SIST EN 771-6:2011
(Main)Specification for masonry units - Part 6: Natural stone masonry units
Specification for masonry units - Part 6: Natural stone masonry units
This European Standard specifies the characteristics and performance requirements of masonry units manufactured from natural stone the width of which is equal to or greater than 80 mm, for which the main intended uses are common, facing or exposed masonry units in loadbearing or non-loadbearing building and civil engineering applications These units are suitable for all forms of coursed or random masonry walling, including single leaf, cavity, partition, retaining and the external masonry to chimneys. They can provide fire protection, thermal insulation, sound insulation and sound absorption. This European Standard includes natural stone masonry units of an overall non-rectangular parallelepiped shape, specially shaped and accessory units for internal and external application. It defines the performance related to e.g. strength, petrographic description, density, porosity, dimensional accuracy, thermal conductivity, water absorption, and frost resistance and provides for the evaluation of conformity of the product to this European Standard. The marking requirements for products covered by this European Standard are also included. This European Standard does not cover storey height panels, natural stone for paving, chimney flue linings nor units intended for use as damp proof course.
Festlegungen für Mauersteine - Teil 6: Natursteine
Diese Europäische Norm legt die Eigenschaften und Leistungsanforderungen an Mauersteine fest, die aus Naturstein mit einer Breite ≥ 80 mm hergestellt und vorwiegend als Normalmauersteine sowie Sicht- und Vormauersteine in tragenden oder nichttragenden Mauerwerksbauten verwendet werden. Diese Mauersteine eignen sich für alle Arten von Schichtenmauerwerk oder unregelmäßigem Mauerwerk einschließlich ein-schaligen und zweischaligen Wänden, Trennwänden, Stützwänden und Schornsteinaußenmauerwerk. Sie können zum Brandschutz, Wärmeschutz, Schallschutz und Schalldämmung beitragen.
Diese Europäische Norm gilt ebenfalls für Mauersteine aus Naturstein mit einer nicht allseitig von Rechtecken begrenzten Form, Formsteine und Ergänzungssteine für den Innen- und Außenbereich.
Sie definiert die Anforderungen z. B. an Festigkeit, petrographische Zusammensetzung, Dichte, Porosität, Maßgenauigkeit, Wärmeleitfähigkeit, Wasseraufnahme und Frostwiderstand und legt die Bewertung der Konformität des Produktes mit der vorliegenden Europäischen Norm fest. Die Anforderungen an die Kenn-zeichnung der von dieser Europäischen Norm erfassten Produkte sind ebenfalls enthalten.
Diese Europäische Norm gilt nicht für geschosshohe Tafeln, Natursteine für Pflaster und für die Auskleidung von Rauchabzügen sowie für Natursteine zur Herstellung feuchtesperrender Schichten.
Spécifications pour éléments de maçonnerie - Partie 6 : Eléments de maçonnerie en pierre naturelle
La présente Norme européenne spécifie les caractéristiques et les exigences de performances des éléments
de maçonnerie en pierre naturelle, dont la largeur ou l'épaisseur est égale ou supérieure à 80 mm, utilisés
essentiellement dans les structures de maçonnerie courante ou de parement, porteuse ou non, dans des
bâtiments ou des ouvrages de génie civil. Ces éléments conviennent à toutes les formes de murs de
maçonnerie appareillée ou non, y compris les murs à simple et double paroi, les cloisons, les murs de
soutènement et la maçonnerie extérieure de conduits de fumée. Ils peuvent constituer une protection contre
les incendies, une isolation thermique ou acoustique et assurer l'absorption des bruits.
La présente Norme européenne couvre les éléments de maçonnerie en pierre naturelle n'ayant pas une forme
générale de parallélépipède rectangle, notamment sur les éléments de forme particulière et les accessoires.
Elle définit les performances relatives, par exemple, à la résistance, la description pétrographique, la masse
volumique, la porosité, la précision dimensionnelle, la conductivité thermique, l'absorption d'eau et la
résistance au gel et décrit l'évaluation de la conformité du produit à la présente Norme européenne. La
présente Norme européenne inclut également les exigences de marquage des produits dont elle traite.
La présente Norme européenne ne couvre pas les panneaux hauteur d'étage, les pierres naturelles pour
pavage, les conduits intérieurs de fumée ni les éléments destinés à être utilisés comme barrière d'étanchéité.
Specifikacija za zidake - 6. del: Zidaki iz naravnega kamna
Ta evropski standard določa značilnosti in zahteve za zmogljivost zidakov iz naravnega kamna, širokih 80 mm ali več, ki so v glavnem predvideni za uporabo pri splošni, fasadni in izpostavljeni zidavi pri nosilnih ali nenosilnih visokih ali nizkih gradnjah. Ti zidaki so primerni za vse oblike sten z zidaki v ravnih vrstah ali naključno razporejenimi zidaki, ki vključujejo enoslojne zidove, votle zidove, predelke, oporne zidove in zunanje stene dimnikov. Lahko zagotavljajo zaščito pred požarom, toplotno izolacijo, zvočno izolacijo in zvočno absorpcijo. Ta evropski standard vključuje zidake iz naravnega kamna nepravokotnih paralelepipednih oblik, zidake posebnih oblik in pomožne zidake za uporabo v notranjosti in zunanjosti. Opredeljuje zmogljivost v zvezi z npr. močjo, petrografskim opisom, gostoto, poroznostjo, dimenzijsko natančnostjo, toplotno prevodnostjo, vpijanjem vode in odpornostjo proti zmrzali ter zagotavlja oceno skladnosti proizvoda s tem evropskim standardom. Vključene so zahteve za označevanje proizvodov, ki jih zajema ta evropski standard. Ta evropski standard ne zajema panelov etažne višine, naravnega kamna za tlakovanje, oblog za dimne cevi za dimnike ali zidakov, ki se uporabljajo kot izolacijska zaščita pred vlago.
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN 771-6:2011
01-julij-2011
1DGRPHãþD
SIST EN 771-6:2005
Specifikacija za zidake - 6. del: Zidaki iz naravnega kamna
Specification for masonry units - Part 6: Natural stone masonry units
Festlegungen für Mauersteine - Teil 6: Natursteine
Spécifications pour éléments de maçonnerie - Partie 6 : Eléments de maçonnerie en
pierre naturelle
Ta slovenski standard je istoveten z: EN 771-6:2011
ICS:
91.100.15 Mineralni materiali in izdelki Mineral materials and
products
SIST EN 771-6:2011 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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SIST EN 771-6:2011
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SIST EN 771-6:2011
EUROPEAN STANDARD
EN 771-6
NORME EUROPÉENNE
EUROPÄISCHE NORM
May 2011
ICS 91.100.15 Supersedes EN 771-6:2005
English Version
Specification for masonry units - Part 6: Natural stone masonry
units
Spécifications pour éléments de maçonnerie - Partie 6 : Festlegungen für Mauersteine - Teil 6: Natursteine
Eléments de maçonnerie en pierre naturelle
This European Standard was approved by CEN on 3 March 2011.
CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European
Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national
standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation
under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same
status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland,
Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2011 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 771-6:2011: E
worldwide for CEN national Members.
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SIST EN 771-6:2011
EN 771-6:2011 (E)
Contents Page
Foreword .4
1 Scope .5
2 Normative references .5
3 Terms and definitions .6
4 Materials of natural stone .8
5 Requirements for natural stone masonry units .8
5.1 General .8
5.2 Denomination .8
5.3 Dimensions and tolerances .8
5.3.1 Dimensions .8
5.3.2 Dimensional tolerances .9
5.4 Configuration . 10
5.4.1 General . 10
5.4.2 Surface appearance . 10
5.5 Apparent density. 10
5.6 Mechanical strengths . 10
5.6.1 Compressive strength . 10
5.6.2 Flexural strength . 11
5.7 Shear bond strength . 11
5.7.1 General . 11
5.7.2 Declaration based on fixed values . 11
5.7.3 Declaration based on tests . 11
5.8 Flexural bond strength . 11
5.9 Open porosity . 12
5.10 Water absorption coefficient by capillarity . 12
5.11 Durability . 12
5.12 Thermal properties . 12
5.13 Reaction to fire . 13
5.14 Water vapour permeability . 13
6 Description, designation and classification of natural stone masonry units . 13
6.1 Description and designation . 13
6.2 Classification . 14
7 Marking . 14
8 Evaluation of conformity . 14
8.1 General . 14
8.2 Initial type testing . 14
8.3 Factory production control . 16
8.3.1 General . 16
8.3.2 Testing and measuring equipment . 16
8.3.3 Production equipment . 16
8.3.4 Raw materials . 16
8.3.5 Production process . 16
8.3.6 Finished product testing . 16
8.3.7 Statistical techniques . 17
8.3.8 Marking and stock control of products . 17
8.3.9 Traceability . 17
8.3.10 Nonconforming products . 17
Annex A (normative) Sampling for initial type testing and for independent testing of
consignments . 18
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EN 771-6:2011 (E)
A.1 General . 18
A.2 Sampling procedure . 18
A.2.1 General . 18
A.2.2 Random sampling . 18
A.2.3 Representative sampling . 18
A.2.4 Dividing the sample . 19
A.2.5 Number of units required for testing . 19
Annex B (informative) Guidance for test frequencies for designing a FPC system to demonstrate
conformity of finished products with the requirements of the standard and the
declaration of the manuafcturer . 20
Annex ZA (informative) Clauses of this European Standard addressing the provisions of the
Construction Products Directive . 21
ZA.1 Scope and relevant characteristics . 21
ZA.2 Procedure(s) for the attestation of conformity of natural stone masonry units . 22
ZA.2.1 System(s) of attestation of conformity . 22
ZA.2.2 EC Certificate and Declaration of Conformity . 23
ZA.3 CE marking and labelling. 25
Bibliography . 28
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SIST EN 771-6:2011
EN 771-6:2011 (E)
Foreword
This document (EN 771-6:2011) has been prepared by Technical Committee CEN/TC 125 “Masonry”, the
secretariat of which is held by BSI.
This European Standard shall be given the status of a national standard, either by publication of an identical
text or by endorsement, at the latest by November 2011, and conflicting national standards shall be withdrawn
at the latest by November 2011.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN 771-6:2005.
This document has been prepared under a mandate given to CEN by the European Commission and the
European Free Trade Association, and supports essential requirements of EU Construction Products Directive
(89/106/EEC).
For relationship with EU Directive(s), see informative Annex ZA, which is an integral part of this document.
This European Standard also takes into account the general rules for unreinforced and reinforced masonry in
EN 1996-1-1.
EN 771, Specification for masonry units consists of:
Part 1: Clay masonry units
Part 2: Calcium silicate masonry units
Part 3: Aggregate concrete masonry units (Dense and light weight aggregates)
Part 4: Autoclaved aerated concrete masonry units
Part 5: Manufactured stone masonry units
Part 6: Natural stone masonry units
According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following
countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech
Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain,
Sweden, Switzerland and the United Kingdom.
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SIST EN 771-6:2011
EN 771-6:2011 (E)
1 Scope
This European Standard specifies the characteristics and performance requirements of masonry units
manufactured from natural stone the width of which is equal to or greater than 80 mm, for which the main
intended uses are common, facing or exposed masonry units in loadbearing or non-loadbearing building and
civil engineering applications These units are suitable for all forms of coursed or random masonry walling,
including single leaf, cavity, partition, retaining and the external masonry to chimneys. They can provide fire
protection, thermal insulation, sound insulation and sound absorption.
This European Standard includes natural stone masonry units of an overall non-rectangular parallelepiped
shape, specially shaped and accessory units for internal and external application.
It defines the performance related to e.g. strength, petrographic description, density, porosity, dimensional
accuracy, thermal conductivity, water absorption, and frost resistance and provides for the evaluation of
conformity of the product to this European Standard. The marking requirements for products covered by this
European Standard are also included.
This European Standard does not cover storey height panels, natural stone for paving, chimney flue linings
nor units intended for use as damp proof course.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated
references, only the edition cited applies. For undated references, the latest edition of the referenced
document (including any amendments) applies.
EN 772-1:2011, Methods of test for masonry units — Part 1: Determination of compressive strength
EN 772-11, Methods of test for masonry units — Part 11: Determination of water absorption of aggregate
concrete, autoclaved aerated concrete, manufactured stone and natural stone masonry units due to capillary
action and the initial rate of water absorption of clay masonry units
EN 772-16:2011, Methods of test for masonry units — Part 16: Determination of dimensions
EN 772-20, Methods of test for masonry units — Part 20: Determination of flatness of faces of aggregate
concrete, manufactured stone and natural stone masonry units
EN 998-2:2010, Specification for mortar for masonry — Part 2: Masonry mortar
EN 1052-2, Methods of test for masonry — Part 2: Determination of flexural strength
EN 1052-3, Methods of test for masonry — Part 3: Determination of initial shear strength
EN 1745, Masonry and masonry products — Methods for determining thermal properties
EN 1936, Natural stone test methods — Determination of real density and apparent density, and of total and
open porosity
EN 12371, Natural stone test methods — Determination of frost resistance
EN 12372, Natural stone test methods — Determination of flexural strength under concentrated load
EN 12407, Natural stone test methods — Petrographic examination
EN 12440, Natural stone — Denomination criteria
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SIST EN 771-6:2011
EN 771-6:2011 (E)
EN ISO 10456, Building materials and products - Hygrothermal properties -Tabulated design values and
procedures for determining declared and design thermal values (ISO 10456:2007)
EN 13373, Natural stone test methods — Determination of geometric characteristics on units
EN 13501-1, Fire classification of construction products and building elements — Part 1: Classification using
data from reaction to fire tests
EN ISO 12572, Hygrothermal performance of building materials and products — Determination of water
vapour transmission properties (ISO 12572:2001)
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
apparent density
ratio between the mass of the dry specimen and its apparent volume
3.2
masonry unit
preformed component intended for use in masonry construction
3.3
face
exposed surface of natural stone masonry units
3.4
natural stone masonry unit
masonry unit manufactured from natural stone
3.5
dimensions and surfaces
defined by reference to figure 1 relates to the name of the dimensions and surfaces for dimensioned stone
and squared rubble stone
3.6
co-ordinating size
size of the co-ordinating space allocated to a masonry unit including allowances for joints and tolerances
3.7
work size
size of a masonry unit specified for its manufacture, to which the actual size conforms within permissible
deviations
3.8
actual size
size of a masonry unit as measured
3.9
rubble stone
masonry unit squared or not of any shape with variable dimensions, whose face is rough or worked
3.10
squared rubble stone
rubble stone which is squared and worked to dimensions declared by the manufacturer
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SIST EN 771-6:2011
EN 771-6:2011 (E)
3.11
regular shaped masonry unit
masonry unit with an overall rectangular parallelepiped shape
3.12
specially shaped masonry unit
masonry unit which is not rectangular parallelepiped
3.13
accessory masonry unit
masonry unit which is shaped to provide a particular function, e.g. to complete the geometry of the masonry
3.14
dimensioned stone
stone worked on all faces to declared dimensions
3.15
extra width
width exceeding the work size, to be adjusted to work-size width after application of the unit on site
3.16
declared value
value that a manufacturer is confident of achieving bearing in mind the precision of the test and the variability
of the manufacturing process
3.17
indicative samples
piece of natural stone of sufficient size to indicate the appearance of the finished work, regarding the
colouring, the vein pattern, the physical structure and face finish
3.18
Category I masonry units
units with a declared compressive strength with a probability of failure to reach it not exceeding 5 %
NOTE This may be determined via the mean or characteristic value.
3.19
Category II masonry units
units not intended to comply with the level of confidence of Category I units
3.20
normalised compressive strength of masonry units
compressive strength of masonry units converted to the air dry compressive strength of an equivalent 100 mm
wide × 100 mm high masonry unit
3.21
mean compressive strength of masonry units
arithmetic mean of the compressive strengths of masonry units
3.22
characteristic compressive strength of masonry units
compressive strength corresponding to the 5 % fractile of the compressive strength of masonry units
3.23
product group
products from one manufacturer having common values for one or more characteristics
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SIST EN 771-6:2011
EN 771-6:2011 (E)
4 Materials of natural stone
Natural stone is a natural product obtained by mining or by quarrying and made into masonry units by a
manufacturing process.
The following groups of materials are considered as natural stone:
Magmatic or igneous rocks: Rocks formed by the cooling and solidification of the magma, e.g. granite,
basalt, diorite, porphyry.
Sedimentary rocks: Rocks formed by deposition (generally in water) and consolidation of organic or
inorganic particles. For example limestone, sandstone, travertine.
Metamorphic rocks: Transformed rocks resulting from action of heat and/or pressure on the pre-existing
rocks. For example slate, gneiss, quartzite, marble.
5 Requirements for natural stone masonry units
5.1 General
The requirements and properties specified in this European Standard shall be defined in terms of the test
methods and other procedures referred to in this European Standard.
It should be noted that the test methods are not always applicable to specially shaped and accessory units as
defined in 3.9 and 3.10.
The conformity criteria given in the following subclauses relate to initial type tests (see 8.2) and to
consignment testing (see Annex A). For the compressive strength of Category I units use a 50 % fractile
(p = 0,50) for mean values or 5 % fractile (p = 0,05) for characteristic values and a confidence level of 95 %.
For production evaluation the manufacturer shall define the conformity criteria in the factory production control
documentation (see 8.3).
5.2 Denomination
The denomination shall be declared in accordance with EN 12440 (meaning traditional name, petrological
family, typical colour and place of origin).
The petrographic name shall be declared in accordance with EN 12407.
5.3 Dimensions and tolerances
5.3.1 Dimensions
The dimensions of a natural stone masonry unit shall be declared (by the manufacturer/supplier) in mm for
length, width and height in that order. They shall be given in terms of work size and in addition the
coordinating size may be given. The assembly dimensions may also be given.
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EN 771-6:2011 (E)
Key
1 Length 3 Height 5 Face
2 Width 4 Bed 6 Header
Figure 1 — Dimensions and surfaces for dimensioned stone and squared rubble stone
5.3.2 Dimensional tolerances
The permissible deviations for individual masonry units shall be as given in Table 1. The manufacturer shall
also declare which tolerance category the dimensioned natural stone masonry units shall fulfil. The
manufacturer may declare closer tolerances for one or more dimensions.
When sampled in accordance with Annex A and tested in accordance with EN 772-16:2011 using
measurement method a), the deviation from the declared dimensions shall not exceed the tolerances for the
dimensions in question taken from Table 1 or any closer tolerance the manufacturer has declared.
In addition the definition of dimensioned stone (finished units) includes the requirement that the faces and
headers are plane without a separate declaration and that the bed faces of category D3 masonry units are
suitable for use with thin layer mortar. When sampled in accordance with Annex A and tested in accordance
with EN 772-20, the flatness shall meet the requirements of Table 1. When sampled in accordance with
Annex A and tested in accordance with EN 13373, the out-of-squareness shall meet the requirements of
Table 1.
When dimensioned stone masonry units category D3, intended for use with thin layer mortar, are sampled in
accordance with Annex A and tested in accordance with EN 772-16:2011 by procedure d, the deviation from
plane parallelism shall not exceed the values given in Table 1.
Table 1 — Dimensional tolerances for natural stone masonry units
Squared rubble
Dimensioned stone
stone
Dimensions Rubble stone
Sawn faces
Faces roughly cut
D1 D2 D3
Length ± 5 mm ± 2 mm ± 2 mm ± 15 mm No requirement
a
No requirement No requirement
Width ± 5 mm ± 2 mm ± 2 mm
Height ± 5 mm ± 2 mm ± 1 mm ± 15 mm No requirement
0,5 % of the longest 0,3 % of the longest 0,3 % of the longest
± 1,5 % for longest
Flatness
dimension of the dimension of the dimension of the straight edge of the
face face face and not more No requirement
face
than ± 1mm for the
bed face
0,5 % for the longest 0,3 % for the 0,3 % for the ± 1,5 % for longest
Squareness
straight edge of the longest straight longest straight No requirement
straight edge of the
face edge of the face edge of the face face
Plane
≤ 1,0 mm
parallelism
a
Not in the case of extra width.
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SIST EN 771-6:2011
EN 771-6:2011 (E)
5.4 Configuration
5.4.1 General
The geometry, shape and features of natural stone masonry units shall be declared by the manufacturer.
The test shall be carried out according to EN 772-16.
5.4.2 Surface appearance
An indicative sample shall show the general tonality and finish of the natural stone, but does not imply any
total uniformity in colour, and veins between the sample and supply.
Indicative samples shall also show the surface finish proposed.
NOTE Indicative samples should be delivered to the customer as an indication of specific characteristics such as
glass seams, spots, holes for travertine, worm holes for marble, crystalline veins, rust stains, geodes, lens etc. which
should not be considered as flaws.
When an indicative sample cannot exhibit sufficiently the characteristic features of the stone, at least three
specimens shall be delivered.
One specimen out of three should indicate the average appearance and the other two the extreme
appearance.
5.5 Apparent density
The manufacturer shall declare the apparent density of six specimens sampled in accordance with Annex A
and tested in accordance with EN 1936.
NOTE The term apparent density used in relation to natural stone units is the same property declared as gross
density in EN 771-1 to EN 771-5.
5.6 Mechanical strengths
5.6.1 Compressive strength
The manufacturer shall declare the mean normalised compressive strength (fb). In addition the manufacturer
may declare the characteristic compressive strength (5 % fractile). In addition, the manufacturer shall declare
whether the natural stone masonry unit is classified as Category I or Category II.
The normalised compressive strength procedure of a natural stone masonry unit is given in EN 772-1:2011,
Annex A.
When the natural stone masonry units are sampled from a consignment in accordance with Annex A and
tested in accordance with EN 772-1 and conditioned in accordance with EN 772-1:2011, 7.3.2 a), the mean
compressive strength of the specified number (at least 10 specimen) of natural stone masonry units from a
consignment shall be not less than the declared compressive strength and no individual unit shall have a
compressive strength of less than 80 % of the declared mean value.
When it is not convenient to test whole units the test specimen may be cubes with (100 ± 5) mm (70 ± 5) mm
or (50 ± 5) mm edge or right circular cylinders with diameter and height which are equal to (100 ± 5) mm
(70 ± 5) mm or (50 ± 5) mm.
The number of specimen shall be at least 10.
Sawn test specimens shall be representative of the original unit section.
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SIST EN 771-6:2011
EN 771-6:2011 (E)
The declaration shall relate to and indicate the intended orientation of natural stone masonry units as tested
and the method of bedding the units. Where, due to its means of formation, the strength properties of the
stone are not isotropic, e.g. due to presence of bedding planes, it may be necessary to declare the
compressive strength normal to more than one face of the test specimen. If the grinding process significantly
alters the contact area of the faces tested or if the flatness tolerance cannot be achieved and the capping
procedure is thereby used, this shall be declared.
The size and shape of the specimen tested shall be reported.
NOTE When shape factors are available e.g. in a database to be used to normalize the compressive strength from
cut cubes or cylinders, these may be used.
5.6.2 Flexural strength
For natural stone masonry units that could be subjected to flexural stress during use, the ma
...
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Specifikacija za zidake - 6. del: Zidaki iz naravnega kamnaFestlegungen für Mauersteine - Teil 6: NatursteineSpécifications pour éléments de maçonnerie - Partie 6 : Eléments de maçonnerie en pierre naturelleSpecification for masonry units - Part 6: Natural stone masonry units91.100.15Mineralni materiali in izdelkiMineral materials and productsICS:Ta slovenski standard je istoveten z:FprEN 771-6kSIST FprEN 771-6:2010en,fr,de01-december-2010kSIST FprEN 771-6:2010SLOVENSKI
STANDARD
kSIST FprEN 771-6:2010
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
FINAL DRAFT
FprEN 771-6
September 2010 ICS 91.100.15 Will supersede EN 771-6:2005English Version
Specification for masonry units - Part 6: Natural stone masonry units
Spécifications pour éléments de maçonnerie - Partie 6 : Eléments de maçonnerie en pierre naturelle
Festlegungen für Mauersteine - Teil 6: Natursteine This draft European Standard is submitted to CEN members for unique acceptance procedure. It has been drawn up by the Technical Committee CEN/TC 125.
If this draft becomes a European Standard, CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration.
This draft European Standard was established by CEN in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without notice and shall not be referred to as a European Standard.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG
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B-1000 Brussels © 2010 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. FprEN 771-6:2010: EkSIST FprEN 771-6:2010
FprEN 771-6:2010 (E) 2 Contents Page Foreword .41 Scope .52 Normative references .53 Terms and definitions .64 Materials of natural stone .75 Requirements for natural stone masonry units .85.1 General .85.2 Denomination .85.3 Dimensions and tolerances .85.3.1 Dimensions .85.3.2 Dimensional tolerances .95.4 Configuration .95.4.1 General .95.4.2 Surface appearance . 105.5 Apparent density. 105.6 Mechanical strengths . 105.6.1 Compressive strength . 105.6.2 Flexural strength . 115.7 Shear bond strength . 115.7.1 General . 115.7.2 Declaration based on fixed values . 115.7.3 Declaration based on tests . 115.8 Flexural bond strength . 115.9 Open porosity . 115.10 Water absorption coefficient by capillarity . 115.11 Durability . 125.12 Thermal properties . 125.13 Reaction to fire . 125.14 Water vapour permeability . 136 Description, designation and classification of natural stone masonry units . 136.1 Description and designation . 136.2 Classification . 137 Marking . 148 Evaluation of conformity . 148.1 General . 148.2 Initial type testing . 148.3 Factory production control . 158.3.1 General . 158.3.2 Testing and measuring equipment . 168.3.3 Production equipment . 168.3.4 Raw materials . 168.3.5 Production process . 168.3.6 Finished product testing . 168.3.7 Statistical techniques . 168.3.8 Marking and stock control of products . 168.3.9 Traceability . 168.3.10 Nonconforming products . 17Annex A (normative)
Sampling for initial type testing and for independent testing of consignments . 18kSIST FprEN 771-6:2010
FprEN 771-6:2010 (E) 3 A.1 General . 18A.2 Sampling procedure . 18A.2.1 General . 18A.2.2 Random sampling . 18A.2.3 Representative sampling . 18A.2.4 Dividing the sample . 19A.2.5 Number of units required for testing . 19Annex B (informative)
Guidance for inspection frequencies . 20Annex ZA (normative)
Clauses of this European Standard addressing the provisions of the Construction Products Directive . 21ZA.1 Scope and relevant characteristics . 21ZA.2 Procedure(s) for the attestation of conformity of natural stone masonry units . 22ZA.2.1 System(s) of attestation of conformity . 22ZA.2.2 EC Certificate and Declaration of Conformity . 23ZA.3 CE marking and labelling. 25Bibliography . 28
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FprEN 771-6:2010 (E) 4 Foreword This document (FprEN 771-6:2010) has been prepared by Technical Committee CEN/TC 125 “Masonry”, the secretariat of which is held by BSI. This document is currently submitted to the Unique Acceptance Procedure. This document will supersede EN 771-6:2005. This document has been prepared under a mandate given to CEN by the European Commission and the European Free Trade Association, and supports essential requirements of EU Construction Products Directive (89/106/EEC). For relationship with EU Directive(s), see informative Annex ZA, which is an integral part of this document. It also takes into account the general rules for unreinforced and reinforced masonry in EN 1996-1-1. EN 771, Specification for masonry units consists of: Part 1: Clay masonry units Part 2: Calcium silicate masonry units Part 3: Aggregate concrete masonry units (Dense and light weight aggregates) Part 4: Autoclaved aerated concrete masonry units Part 5: Manufactured stone masonry units Part 6: Natural stone masonry units kSIST FprEN 771-6:2010
FprEN 771-6:2010 (E) 5 1 Scope This European Standard specifies the characteristics and performance requirements of masonry units manufactured from natural stone the width of which is equal to or greater than 80 mm, for which the main intended uses are common, facing or exposed masonry units in loadbearing or non-loadbearing building and civil engineering applications These units are suitable for all forms of coursed or random masonry walling, including single leaf, cavity, partition, retaining and the external masonry to chimneys. They can provide fire protection, thermal insulation, sound insulation and sound absorption. This European Standard includes natural stone masonry units of an overall non-rectangular parallelepiped shape, specially shaped and accessory units for internal and external application. It defines the performance related to e.g. strength, petrographic description, density, porosity, dimensional accuracy, thermal conductivity, water absorption, and frost resistance and provides for the evaluation of conformity of the product to this European Standard. The marking requirements for products covered by this European Standard are also included. This European Standard does not cover storey height panels, natural stone for paving, chimney flue linings nor units intended for use as damp proof course. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 772-1:2000, Methods of test for masonry units — Part 1: Determination of compressive strength EN 772-11, Methods of test for masonry units — Part 11: Determination of water absorption of aggregate concrete, autoclaved aerated concrete, manufactured stone and natural stone masonry units due to capillary action and the initial rate of water absorption of clay masonry units EN 772-16, Methods of test for masonry units — Part 16: Determination of dimensions EN 772-20, Methods of test for masonry units — Part 20: Determination of flatness of faces of aggregate concrete, manufactured stone and natural stone masonry units FprEN 998-2:2010, Specification for mortar for masonry — Part 2: Masonry mortar EN 1052-2, Methods of test for masonry — Part 2: Determination of flexural strength EN 1052-3, Methods of test for masonry — Part 3: Determination of initial shear strength prEN 1745:2010, Masonry and masonry products — Methods for determining thermal properties EN 1936, Natural stone test methods — Determination of real density and apparent density, and of total and open porosity EN 12371, Natural stone test methods — Determination of frost resistance EN 12372, Natural stone test methods — Determination of flexural strength under concentrated load EN 12407, Natural stone test methods — Petrographic examination EN 12440, Natural stone — Denomination criteria EN 12524, Building materials and products — Hydrothermal properties — Tabulated design values kSIST FprEN 771-6:2010
FprEN 771-6:2010 (E) 6 EN 13373, Natural stone test methods — Determination of geometric characteristics on units EN 13501-1, Fire classification of construction products and building elements — Part 1: Classification using data from reaction to fire tests EN ISO 12572, Hygrothermal performance of building materials and products — Determination of water vapour transmission properties (ISO 12572:2001) 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 apparent density ratio between the mass of the dry specimen and its apparent volume 3.2 masonry unit preformed component intended for use in masonry construction 3.3 face exposed surface of natural stone masonry units 3.4 natural stone masonry unit masonry unit manufactured from natural stone 3.5 dimensions and surfaces defined by reference to figure 1 relates to the name of the dimensions and surfaces for dimensioned stone and squared rubble stone 3.6 co-ordinating size size of the co-ordinating space allocated to a masonry unit including allowances for joints and tolerances 3.7 work size size of a masonry unit specified for its manufacture, to which the actual size conforms within permissible deviations 3.8 actual size size of a masonry unit as measured 3.9 rubble stone masonry unit squared or not of any shape with variable dimensions, whose face is rough or worked 3.10 squared rubble stone rubble stone which is squared and worked to dimensions declared by the manufacturer 3.11 regular shaped masonry unit masonry unit with an overall rectangular parallelepiped shape kSIST FprEN 771-6:2010
FprEN 771-6:2010 (E) 7 3.12 specially shaped masonry unit masonry unit which is not rectangular parallelepiped 3.13 accessory masonry unit masonry unit which is shaped to provide a particular function, e.g. to complete the geometry of the masonry 3.14 dimensioned stone stone worked on all faces to declared dimensions 3.15 extra width width exceeding the work size, to be adjusted to work-size width after application of the unit on site 3.16 declared value value that a manufacturer is confident of achieving bearing in mind the precision of the test and the variability of the manufacturing process 3.17 indicative samples piece of natural stone of sufficient size to indicate the appearance of the finished work, regarding the colouring, the vein pattern, the physical structure and face finish 3.18 Category I masonry units units with a declared compressive strength with a probability of failure to reach it not exceeding 5 % NOTE This may be determined via the mean or characteristic value. 3.19 Category II masonry units units not intended to comply with the level of confidence of Category I units 3.20 normalised compressive strength of masonry units compressive strength of masonry units converted to the air dry compressive strength of an equivalent 100 mm wide × 100 mm high masonry unit 3.21 mean compressive strength of masonry units arithmetic mean of the compressive strengths of masonry units 3.22 characteristic compressive strength of masonry units compressive strength corresponding to the 5 % fractile of the compressive strength of masonry units 3.23 product group products from one manufacturer having common values for one or more characteristics 4 Materials of natural stone Natural stone is a natural product obtained by mining or by quarrying and made into masonry units by a manufacturing process. The following groups of materials are considered as natural stone: kSIST FprEN 771-6:2010
FprEN 771-6:2010 (E) 8 Magmatic or igneous rocks: Rocks formed by the cooling and solidification of the magma, e.g. granite, basalt, diorite, porphyry. Sedimentary rocks: Rocks formed by deposition (generally in water) and consolidation of organic or inorganic particles. For example limestone, sandstone, travertine. Metamorphic rocks: Transformed rocks resulting from action of heat and/or pressure on the pre-existing rocks. For example slate, gneiss, quartzite, marble. 5 Requirements for natural stone masonry units 5.1 General The requirements and properties specified in this European Standard shall be defined in terms of the test methods and other procedures referred to in this European Standard. It should be noted that the test methods are not always applicable to specially shaped and accessory units as defined in 3.9 and 3.10. The conformity criteria given in the following subclauses relate to initial type tests (see 8.2) and to consignment testing (see Annex A). For the compressive strength of Category I units use a 50 % fractile (p = 0,50) for mean values or 5 % fractile (p = 0,05) for characteristic values and a confidence level of 95 %. For production evaluation the manufacturer shall define the conformity criteria in the factory production control documentation (see 8.3). 5.2 Denomination The denomination shall be declared in accordance with EN 12440 (meaning traditional name, petrological family, typical colour and place of origin). The petrographic name shall be declared in accordance with EN 12407. 5.3 Dimensions and tolerances 5.3.1 Dimensions The dimensions of a natural stone masonry unit shall be declared (by the manufacturer/supplier) in mm for length, width and height in that order. They shall be given in terms of work size and in addition the coordinating size may be given. The assembly dimensions may also be given.
Key 1 Length 3 Height 5 Face 2 Width 4 Bed 6 Header Figure 1 — Dimensions and surfaces for dimensioned stone and squared rubble stone kSIST FprEN 771-6:2010
FprEN 771-6:2010 (E) 9 5.3.2 Dimensional tolerances The permissible deviations for individual masonry units shall be as given in Table 1. The manufacturer shall also declare which tolerance category the dimensioned natural stone masonry units shall fulfil. The manufacturer may declare closer tolerances for one or more dimensions. When sampled in accordance with Annex A and tested in accordance with EN 772-16 using measurement method a), the deviation from the declared dimensions shall not exceed the tolerances for the dimensions in question taken from Table 1 or any closer tolerance the manufacturer has declared. In addition the definition of dimensioned stone (finished units) includes the requirement that the faces and headers are plane without a separate declaration and that the bed faces of category D3 masonry units are suitable for use with thin layer mortar. When sampled in accordance with Annex A and tested in accordance with EN 772-20, the flatness shall meet the requirements of Table 1. When sampled in accordance with Annex A and tested in accordance with EN 13373, the out-of-squareness shall meet the requirements of Table 1. When dimensioned stone masonry units category D3, intended for use with thin layer mortar, are sampled in accordance with Annex A and tested in accordance with EN 772-16 by procedure d, the deviation from plane parallelism shall not exceed the values given in Table 1. Table 1 — Dimensional tolerances for natural stone masonry units Dimensions Dimensioned stone Squared rubble stone Rubble stone Sawn faces Faces roughly cut D1 D2 D3 Length ± 5 mm ± 2 mm ± 2 mm ± 15 mm No requirementWidtha ± 5 mm ± 2 mm ± 2 mm No requirement No requirementHeight ± 5 mm ± 2 mm ± 1 mm ± 15 mm No requirementFlatness 0,5 % of the longest dimension of the face 0,3 % of the longest dimension of the face 0,3 % of the longest dimension of the face and not more than ± 1mm for the bed face ± 1,5 % for longest straight edge of the face No requirementSquareness 0,5 % for the longest straight edge of the face 0,3 % for the longest straight edge of the face 0,3 % for the longest straight edge of the face ± 1,5 % for longest straight edge of the face No requirementPlane parallelism
≤ 1,0
a Not in the case of extra width.
5.4 Configuration 5.4.1 General The geometry, shape and features of natural stone masonry units shall be declared by the manufacturer. The test shall be carried out according to EN 772-16. kSIST FprEN 771-6:2010
FprEN 771-6:2010 (E) 10 5.4.2 Surface appearance An indicative sample shall show the general tonality and finish of the natural stone, but does not imply any total uniformity in colour, and veins between the sample and supply. Indicative samples shall also show the surface finish proposed. NOTE Indicative samples should be delivered to the customer as an indication of specific characteristics such as glass seams, spots, holes for travertine, worm holes for marble, crystalline veins, rust stains, geodes, lens etc. which should not be considered as flaws. When an indicative sample cannot exhibit sufficiently the characteristic features of the stone, at least three specimens shall be delivered. One specimen out of three should indicate the average appearance and the other two the extreme appearance. 5.5 Apparent density The manufacturer shall declare the apparent density of six specimens sampled in accordance with Annex A and tested in accordance with EN 1936. NOTE The term apparent density used in relation to natural stone units is the same property declared as gross density in FprEN 771-1 to FprEN 771-5. 5.6 Mechanical strengths 5.6.1 Compressive strength The manufacturer shall declare the mean normalised compressive strength (fb). In addition the manufacturer may declare the characteristic compressive strength (5 % fractile). In addition, the manufacturer shall declare whether the natural stone masonry unit is classified as Category I or Category II. The normalised compressive strength procedure of a natural stone masonry unit is given in EN 772-1:2000, Annex A. When the natural stone masonry units are sampled from a consignment in accordance with Annex A and tested in accordance with EN 772-1 and conditioned in accordance with EN 772-1:2000, 7.3.2 a), then the mean compressive strength of the specified number (at least 10 specimen) of natural stone masonry units from a consignment shall be not less than the declared compressive strength and no individual unit shall have a compressive strength of less than 80 % of the declared mean value. When it is not convenient to test whole units the test specimen may be cubes with (100 ± 5) mm (70 ± 5) mm or (50 ± 5) mm edge or right circular cylinders with diameter and height which are equal to (100 ± 5) mm (70 ± 5) mm or (50 ± 5) mm. The number of specimen shall be at least 10. Sawn test specimens shall be representative of the original unit section. The declaration shall relate to and indicate the intended orientation of natural stone masonry units as tested and the method of bedding the units. Where, due to its means of formation, the strength properties of the stone are not isotropic, e.g. due to presence of bedding planes, it may be necessary to declare the compressive strength normal to more than one face of the test specimen. If the grinding process significantly alters the contact area of the faces tested or if the flatness tolerance cannot be achieved and the capping procedure is thereby used, this shall be declared. The size and shape of the specimen tested shall be reported. kSIST FprEN 771-6:2010
FprEN 771-6:2010 (E) 11 NOTE When shape factors are available e.g. in a database to be used to normalize the compressive strength from cut cubes or cylinders, these may be used. 5.6.2 Flexural strength For natural stone masonry units that could be subjected to flexural stress during use, the manufacturer shall declare the mean flexural strength of ten specimens sampled in accordance with Annex A and tested in accordance with EN 12372. 5.7 Shear bond strength 5.7.1 General For natural stone masonry units intended to be used in elements subjected to structural requirements, the shear bond strength of the unit in combination with mortar shall be declared in terms of the characteristic initial shear strength in accordance with EN 1052-3. The declaration may be made either on the basis of fixed values as in 5.7.2 below or tests as in 5.7.3 below. The manufacturer shall declare whether the value of bond strength has been obtained from the fixed values or from test. NOTE In most cases, it is expected that the use of fixed values will be sufficient. 5.7.2 Declaration based on fixed values When no declaration is made in accordance with 5.7.3, the characteristic initial shear strength of the unit in combination with mortar may be declared by reference to FprEN 998-2:2010, Annex C. 5.7.3 Declaration based on tests The characteristic initial shear strength of the unit in combination with a specific type of mortar specified in accordance with FprEN 998-2 may be declared based on the tests on masonry units sampled from a consignment in accordance with Annex A and tested in accordance with EN 1052-3. The characteristic initial shear strength shall not be less than the declared value. NOTE Bond strength depends on the mortar, the masonry unit and the workmanship. 5.8 Flexural bond strength When relevant to the uses for which natural stone masonry units are put on the market, the flexural bond strength of masonry made with the units and mortar specified in accordance with FprEN 998-2 shall be declared. The declaration shall give the value of the characteristic flexural strength of the masonry combination for either a plane of failure perpendicular to the bed joints or a plane of failure parallel to the bed joints or both, as relevant, and the mortar specification for which the declaration is valid. When natural stone masonry units are sampled in accordance with Annex A and tested
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