SIST EN 771-5:2004
(Main)Specification for masonry units - Part 5: Manufactured stone masonry units
Specification for masonry units - Part 5: Manufactured stone masonry units
This EN specifies the characteristics and performance requirements of Manufactured Stone Masonry Units for which the main intended uses are facing or exposed masonry in loadbearing or non-loadbearing building and civil engineering applications. The units are suitable for all forms of coursed or random masonry walling, including single leaf, cavity, partition, retaining and the external masonry to chimneys and they can provide fire protection, thermal insulation, sound insulation and sound absorption.
Festlegungen für Mauersteine - Teil 5: Betonwerksteine
Diese Europäische Norm beschreibt die Eigenschaften und Leistungsanforderungen für Betonwerksteine, die vorwiegend für tragendes und nichttragendes Sicht- oder Verblendmauerwerk in Bauwerken des Hoch- und Tiefbaus verwendet werden. Diese Steine sind für alle Arten von Schichtenmauerwerk oder unregelmäßigem Mauerwerk einschließlich einschaligen Mauerwerks, zweischaligen Mauerwerks, Trennwänden, Stützmauern und Außenmauer-werk von Schornsteinen geeignet. Sie können dem Brandschutz, dem Wärmeschutz und dem Schallschutz dienen.
Diese Norm gilt für Betonwerksteine, die so durch Gießen oder Pressen hergestellt werden, dass sie Naturstein ähneln. Die Oberflächen von Betonwerksteinen sind glatt oder strukturiert, z. B. durch Formen, Spalten, Waschen, Sprengen oder Stocken hergestellt und mit gleichen oder unterschiedlichen Ansichten gestaltet. Die Norm gilt für Mauersteine, die einheitlich aus dem gleichen Beton hergestellt sind und für solche, deren seitliche Außenwandungen aus anderen Betonmischungen bestehen. Sie gilt nicht für Mauersteine, deren Außenseiten mit dekorativen Bekleidungen beklebt sind. Mauersteine, die den Anforderungen von prEN 771-3 entsprechen, sind nicht Gegenstand dieser Norm.
Diese Norm beschreibt die Anforderungen, z.B. an Festigkeit, Rohdichte, Maßgenauigkeit und Aussehen. Ferner werden die Konformitätsbewertung und die Kennzeichnung der von dieser Europäischen Norm erfassten Produkte festgelegt.
Diese Europäische Norm gilt nicht für geschosshohe Tafeln, für Mauersteine für die Auskleidung von Rauchabzügen, für Steine mit aufgeklebten, dekorativen Bekleidungen und nicht für Produkte zur Herstellung feuchtesperrender Schichten. Sie enthält keine genormten Größen für Betonwerksteine und keine Sollmaße oder Winkel für Formsteine. Diese Europäische Norm gilt nicht für Steine mit einem Wärmedämmstoff, der auf die Seiten des Steins, die Feuer ausgesetzt sein können, aufgebracht ist.
Spécifications pour éléments de maçonnerie - Partie 5: Eléments de maçonnerie en pierre reconstituée en béton
La présente Norme européenne définit les caractéristiques et les exigences de performances des éléments de maçonnerie en pierre reconstituée en béton utilisés, exposés ou non, principalement en maçonnerie de parement, porteuse ou non, dans des bâtiments ou des ouvrages de génie civil. Ces éléments conviennent a toutes les formes de murs de maçonnerie appareillée ou non, y compris les murs a simple et double paroi, les cloisons, les murs de soutenement 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 traite des éléments de maçonnerie en béton fabriqués en vue d'imiter la pierre naturelle, en mettant en ?uvre des techniques de moulage ou de compression avec ou sans surfaces structurées obtenues, par exemple, par moulage, fendage, lavage, sablage ou usinage et avec ou sans effets de géométrie variable. Elle traite des éléments de maçonnerie mono-béton ainsi que de ceux constitués de bétons bi-couche mais exclut les éléments fabriqués avec une face décorative collée. La présente norme ne concerne pas les éléments de maçonnerie destinés a etre conformes a l'EN 771-3.
Elle définit, d'une part, les performances relatives, par exemple, a la résistance, a la masse volumique, aux tolérances dimensionnelles, a l'aspect de surface et permet, d'autre part, d'évaluer la conformité du produit a la présente Norme européenne. Elle inclut également les exigences de marquage des produits dont elle traite.
La présente Norme européenne ne couvre pas les panneaux hauteur d'étage, les éléments de maçonnerie utilisés pour les conduits intérieurs de fumée ni ceux fabriqués avec une face décorative collée. Elle ne traite pas des produits destinés a servir de barriere d'étanchéité et ne préconise pas non plus les dimensions normalisées des éléments de maçonnerie en pierre reconstituée en béton, les dimensions de fabrication, ni les caracté
Specifikacija za zidake – 5. del: Zidaki iz umetnega kamna
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN 771-5:2004
01-april-2004
Specifikacija za zidake – 5. del: Zidaki iz umetnega kamna
Specification for masonry units - Part 5: Manufactured stone masonry units
Festlegungen für Mauersteine - Teil 5: Betonwerksteine
Spécifications pour éléments de maçonnerie - Partie 5: Eléments de maçonnerie en
pierre reconstituée en béton
Ta slovenski standard je istoveten z: EN 771-5:2003
ICS:
91.100.15 Mineralni materiali in izdelki Mineral materials and
products
SIST EN 771-5:2004 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
---------------------- Page: 1 ----------------------
EUROPEAN STANDARD
EN 771-5
NORME EUROPÉENNE
EUROPÄISCHE NORM
December 2003
ICS 91.100.30
English version
Specification for masonry units - Part 5: Manufactured stone
masonry units
Spécifications pour éléments de maçonnerie - Partie 5: Festlegungen für Mauersteine - Teil 5: Betonwerksteine
Eléments de maçonnerie en pierre reconstituée
This European Standard was approved by CEN on 3 November 2003.
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 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 Management Centre has the same status as the official
versions.
CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece,
Hungary, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Slovakia, Spain, Sweden, Switzerland and United
Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36 B-1050 Brussels
© 2003 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 771-5:2003 E
worldwide for CEN national Members.
---------------------- Page: 2 ----------------------
EN 771-5:2003 (E)
Contents
Foreword .3
1 Scope.4
2 Normative references.4
3 Terms and definitions.5
4 Materials.7
4.1 General .7
5 Requirements for manufactured stone masonry units .7
5.1 General .7
5.2 Dimensions and tolerances .7
5.3 Configuration.8
5.4 Density .9
5.5 Compressive strength .10
5.6 Thermal properties.11
5.7 Durability.11
5.8 Water absorption by capillary.11
5.9 Moisture movement .11
5.10 Water vapour permeability .12
5.11 Reaction to fire .12
5.12 Shear bond strength .12
5.13 Flexural bond strength .12
6 Description, designation and classification of manufactured stone masonry units .13
6.1 Description and designation.13
6.2 Classification.13
7 Marking.13
8 Evaluation of conformity .14
8.1 General .14
8.2 Initial type tests .14
8.3 Factory production control .15
Annex A (normative) Sampling for initial type testing and for independent testing of
consignments.16
Annex B (normative) Normalised compressive strength .18
Annex ZA (informative) Clauses of this European Standard addressing the provisions of
the EU Construction Products Directive .19
2
---------------------- Page: 3 ----------------------
EN 771-5:2003 (E)
Foreword
This document (EN 771-5:2003) 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 June 2004, and conflicting national standards shall
be withdrawn at the latest by September 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 Directive(s).
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 Eurocode 6.
Annex A and annex B of this European Standard are normative.
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, Czech
Republic, Denmark, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Luxembourg,
Malta, Netherlands, Norway, Portugal, Slovakia, Spain, Sweden, Switzerland and the United
Kingdom.
3
---------------------- Page: 4 ----------------------
EN 771-5:2003 (E)
1 Scope
This European Standard specifies the characteristics and performance requirements of manufactured
stone masonry units for which the main intended uses are facing or exposed masonry in load bearing
or non-load bearing building and civil engineering applications. The 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 standard covers concrete masonry units manufactured to resemble natural stone using casting or
pressing techniques with or without textured surfaces produced, by casting, splitting, washing,
blasting or tooling and with or without variable outline effects. It covers homogeneous masonry units
and those consisting of different facing and backing concrete mixes but excludes those manufactured
with an adhesive bonded decorative face. This standard does not cover masonry units intended to
conform to EN 771-3.
It defines the performance related to e.g. strength, density, dimensional accuracy, surface
appearance 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 apply to storey height panels, masonry units used for chimney flues
or units manufactured with an adhesive bonded decorative face. It does not include products intended
to be used as a damp proof course nor does it specify standard sizes for manufactured stone
masonry units or work dimensions and angles of specially shaped units. It does not cover units with
an incorporated thermal insulation material bonded to the faces of the unit susceptible to be exposed
to fire.
2 Normative references
This European Standard incorporates by dated or undated reference, provisions from other
publications. These normative references are cited at the appropriate places in the text, and the
publications are listed hereafter. For dated references, subsequent amendments to or revisions of any
of these publications apply to this European Standard only when incorporated in it by amendment or
revision. For undated references the latest edition of the publication referred to applies (including
amendments).
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, manufactured stone and natural stone masonry units due to capillary action and
the initial rate of water absorption of clay masonry units.
EN 772-13, Methods of test for masonry units — Part 13: Determination of net and gross dry density
of masonry units (except for natural stone).
EN 772-14, Methods of test for masonry units — Part 14: Determination of moisture movement of
aggregate concrete and manufactured stone 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.
EN 998-2: 2003, Specification for mortar for masonry — Part 2: Masonry mortar.
EN 1052-3, Methods of test for masonry — Part 3: Determination of initial shear strength.
4
---------------------- Page: 5 ----------------------
EN 771-5:2003 (E)
EN 1745, Masonry and masonry products — Methods for determining design thermal values.
EN 13501-1, Fire classification of construction products and building elements - Part 1: Classification
using test 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 European Standard, the following terms and definitions apply.
3.1
masonry unit
preformed component intended for use in masonry construction
3.2
facing masonry unit
masonry unit intended for use with one or more faces visible in use which may or may not be exposed
3.3
exposed face
face intended to be exposed to external climatic conditions
3.4
manufactured stone masonry unit
facing masonry unit having at least one exposed face with a close structure formed from either one or
two homogeneous mixtures of aggregate, cementitious binder and other materials moulded under
pressure and/or vibration and with or without further processing, intended to resemble and be used as
an alternative to natural stone
3.5
two-part masonry unit
masonry unit manufactured with different facing and backing concretes
3.6
co-ordinating size
size of the co-ordinating space allocated to a masonry unit including an allowance for joints
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
regular shaped masonry unit
masonry unit with an overall rectangular parallelepiped shape
3.10
specially shaped masonry unit
masonry unit which is not a rectangular parallelepiped
5
---------------------- Page: 6 ----------------------
EN 771-5:2003 (E)
3.11
accessory unit
masonry unit which is shaped to provide a particular function, e.g. to complete the geometry of the
masonry
3.12
interlocking features
shaped, matched projections and indentations on masonry units, e.g. tongue and groove systems
3.13
recess
depression or indentation in one or more surfaces of a masonry unit (e.g. mortar pocket, rendering
keyway, grip hole)
3.14
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
NOTE See procedure given in annex B of this standard.
3.15
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
3.16
profiled surface
surface with pronounced relief
3.17
textured surface
surface which, either during or after manufacture, is subjected to mechanical, physical or chemical
processing
3.18
Category I masonry units
units with a declared compressive strength with a probability of failure to reach it not exceeding 5 %.
This can 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
mean compressive strength of masonry units
arithmetic mean of the compressive strengths of masonry units
3.21
characteristic compressive strength of masonry units
compressive strength corresponding to the 5 % fractile of the compressive strength of masonry units
6
---------------------- Page: 7 ----------------------
EN 771-5:2003 (E)
4 Materials
4.1 General
The specifications of the materials to be used shall be included in the production control
documentation. If appropriate European Standards are available, they shall be used except that
aggregate need not comply with the grading requirements. If not available, the manufacturer shall
specify the materials and have data on their suitability.
5 Requirements for manufactured 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 standard test methods are not always applicable to specially shaped
masonry units and accessory units as defined in 3.10 and 3.11 respectively.
The conformity criteria given in the following sub-clauses relate to initial type testing (see 8.2) and
when relevant 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 Dimensions and tolerances
5.2.1 Dimensions
The manufacturer shall declare the dimensions of the manufactured stone masonry units in
millimetres for length, width and height, in that order (see Figure 1), and shall declare the tolerance
category (see 5.2.2). They shall be given in terms of work size.
NOTE In addition the co-ordinating size can be given.
They shall not exceed 650 mm in any co-ordinating dimension excluding the thickness of any profile
on a non-planar face.
7
---------------------- Page: 8 ----------------------
EN 771-5:2003 (E)
4
2
6
3
5
1
Key
1 Length 2 Width 3 Height
4 Bed 5 Face 6 Header
NOTE This relates to the normal use of the masonry units in the wall.
Figure 1 — Dimensions and surfaces
5.2.2 Tolerances
The actual dimensions of individual regular units shall conform to the declared work size dimensions
subject to the tolerance given in Table 1, except where surfaces are deliberately non-planar, in which
case the manufacturer shall declare the tolerances. The manufacturer may declare closer tolerances
for one or more dimensions.
Table 1 — Limit deviations in millimetres
Tolerance D1 D2 D3
category
Length + 3 + 1
– 5 – 3
Manufacturer’s
Width + 3 + 1 declared
– 5 – 3 values
Height + 3 + 1
– 5 – 3
Tolerances for specially shaped and accessory units shall be declared by the manufacturer.
If sampled in accordance with A.2 and tested in accordance with EN 772-16, the mean value of the
measurements taken of any one dimension of a single unit shall not vary from the manufacturer's
work size by more than the tolerances given above for the declared tolerance category.
5.3 Configuration
5.3.1 General
Units may be homogenous or two-part but in the case of two-part masonry units the facing mix shall
have a thickness of not less than 20 mm. There shall be no delamination between the facing and the
8
---------------------- Page: 9 ----------------------
EN 771-5:2003 (E)
backing concretes. Units for load bearing applications shall be solid or with not more than 25 % of
formed voids by surface area and may be provided with or without recesses or interlocking features.
They are group 1 masonry units for the purposes of Eurocode 6. When compliance with the maximum
area of voids cannot be assessed by visual inspection, masonry units shall be sampled in accordance
with A.2, measured in accordance with EN 772-16 and the values calculated. The area of the voids in
the bed face of any unit shall not exceed 25 % of the bed face area unless declared by the
manufacturer (see 6.1 c)).
5.3.2 Surface appearance
The exposed surfaces of manufactured stone masonry units shall be plain, profiled or textured as
declared by the manufacturer. Compliance of textured or profiled surfaces may be established on the
basis of comparison with any approved samples. Comparison shall be made from a distance of 3 m in
normal daylight conditions.
5.3.3 Flatness of surfaces
Where the surfaces of the unit are declared by the manufacturer to be plain (see 5.3.2), they shall not
deviate from a plane by more than (0,1 L ) mm or 2 mm whichever is the greater, where L is the
d
d
length of the diagonal of the surface declared plain. If sampled in accordance with A.2 and tested in
accordance with EN 772-20, no individual measurement of the deviation from a plane shall exceed
the value given above.
5.4 Density
When relevant to the uses for which the unit is put on the market, and in all cases for masonry units
intended to be used in elements subject to acoustic requirements, the manufacturer shall declare its
gross dry density. For two-part units the net dry density of each part shall be declared.
NOTE This declaration can be made for the evaluation of
loading
sound insulation;
thermal insulation;
fire resistance.
The deviation from the manufacturer's declared mean gross dry density and mean net dry density
shall not be more than 7,5 %.
For the gross dry density of homogeneous units and of two-part units, whole units or representative
samples shall be used. For the net dry density of the constituent concretes of two-part units samples
of the unformed mix may be taken and moulded in a manner to obtain a level of compaction similar to
that attained in the units.
If sampled in accordance with A.2 and tested in accordance with EN 772-13, the mean value of the
dry density (gross or net) of the six units tested shall be within 7,5 % of the manufacturer's declared
value.
9
---------------------- Page: 10 ----------------------
EN 771-5:2003 (E)
5.5 Compressive strength
5.5.1 Declared value
The normalised strength of the manufactured stone masonry units in compression shall be declared
by the manufacturer (declared value-for definition see 3.15). Either the mean or the characteristic
(5 % fractile) value may be declared but it shall be clearly stated which has been declared. The
declaration shall relate to and indicate the intended orientation(s) of the masonry units as tested, the
method(s) of bedding the units and whether any voids present are intended to be fully filled with
mortar. In addition the manufacturer shall declare whether the manufactured stone masonry unit is
classified as Category I or Category II (see ZA.2).
If surface preparation is required (see 7.2.1 of EN 772-1:2000) it shall be carried out in accordance
with 7.2.4 or 7.2.5 of EN 772-1:2000 and the units shall be conditioned in accordance with 7.3.2 a) or
7.3.5 of EN 772-1:2000. The manufacturer shall declare the conditioning regime and the surface
preparation to be used in establishing compliance with the declared compressive strength of the units.
The procedure for normalising the compressive strength of a unit is given in annex B.
The compressive strength shall be determined by testing either whole masonry units or cubes of
dimension 100 mm or 150 mm. Cubes may be cut from a unit or may be prepared from samples of
the unformed mix moulded in a manner to obtain a level of compaction similar to that attained in the
unit.
If sampled in accordance with A.2 and tested in accordance with EN 772-1 using the surface
preparation and conditioning as given above then:
Conformity with the declared Mean Value of the normalised compressive strength shall be met if
the mean of the normalised compressive strengths of the six units tested is not less than the
manufacturer's declared value and no individual normalised compressive strength is less than
0,8·the declared value;
Conformity with the declared Characteristic Value of the normalised compressive strength shall
be met if the individual normalised compressive strengths of the first six units tested are not less
than the manufacturer's declared value except that if only one of the tested units is less than the
declared value but not less than0,9· the declared value, the remaining 6 units shall be tested
and all of the individual normalised compressive strengths of these six units shall be not less than
the declared value.
5.5.2 Minimum value
The minimum strength of manufactured stone masonry units meeting the requirements of this
standard shall be as given in Table 2.
10
---------------------- Page: 11 ----------------------
EN 771-5:2003 (E)
a
Table 2 — Normalised compressive strength of manufactured stone masonry units
Type of masonry unit Mean compressive Characteristic compressive
strength strength
2 2
N/mm N/mm
Homogeneous 20 17,5
Two-part:
facing mix 20 17,5
backing mix 15 13
NOTE 1 The compressive strength values in this table are based on durability and other
considerations.
NOTE 2 When the compressive strength of two-part units is required to establish the strength
of walls in accordance with design codes, only results obtained from testing whole masonry
units should be used.
a
For the normalised compressive strength see annex B.
5.6 Thermal properties
When relevant to the uses for which the unit is put on the market and in all cases for masonry units
intended to be used in elements subject to thermal requirements, the manufacturer shall provide
information on the thermal resistance of the manufactured stone masonry units. It shall be done by
reference to EN 1745, or alternatively to 5.3 and 5.4.
5.7 Durability
When relevant to the uses for which the units are put on the market the manufacturer shall evaluate
and declare the freeze/thaw resistance of the units by reference to the provisions valid in the intended
place of use of the units until an appropriate European Standard is available.
5.8 Water absorption by capillarity
5.8.1 Declared value
The manufacturer shall declare the water absorption due to capillary action of the exposed face of a
manufactured stone masonry unit. Units shall be sampled in accordance with A.2 and tested in
accordance with EN 772-11 with an immersion time of (10 ± 0,2) min.
5.8.2 Maximum value
2
The water absorption due to capillary action of the exposed face of a unit shall not exceed 3,0 g/m s.
5.9 Moisture movement
When relevant to the uses for which the unit is put on the market, and in all cases for masonry units
intended to be used in elements subject to structural requirements, the moisture movement of
manufactured stone masonry units shall be declared by the manufacturer. When sampled in
accordance with A.2 and tested in accordance with EN 772-14 the mean value of the moisture
movement shall not exceed the manufacturer's declared value.
11
---------------------- Page: 12 ----------------------
EN 771-5:2003 (E)
5.10 Water vapour permeability
When relevant to the uses for which the unit is put on the market, the manufacturer shall provide
information on the water vapour permeability through the water vapour diffusion coefficient tabulated
values given in EN 1745, or determined in accordance with EN ISO 12572.
5.11 Reaction to fire
For units intended to be used in elements subject to fire requirements the manufacturer shall declare
the reaction to fire classification of the masonry unit.
For masonry units containing a mass or volume fraction of £ 1,0 % (whichever is the most onerous) of
homogeneously distributed organic materials the declaration may be fire Class A1 without the need to
test.
Masonry units containing a mass or volume fraction of > 1,0 % (whichever is the most onerous) of
homogeneously distributed organic materials shall be classified in accordance with EN 13501-1 and
the appropriate reaction to fire class declared.
NOTE Attention is drawn to the Commission Decision 96/603/EC, amended by Commission Decision
2000/605/EC, in which non-combustible masonry units containing not more than a mass or volume fraction of
1,0 % (whichever is the more onerous) of homogeneously distributed organic materials are classified as reaction
to fire Class A1 without testing.
5.12 Shear bond strength
5.12.1 General
For manufactured 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 5.12.2 below or tests as in 5.12.3 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.
5.12.2 Declaration based on fixed values
When no declaration is made in accordance with 5.12.3 the characteristic initial shear strength of the
unit in combination with mortar may be declared by reference to EN 998-2:2003, annex C.
5.12.3 Declaration based on tests
The characteristic initial shear strength of the unit in combination with a specific type of mortar
specified in accordance with EN 998-2 may be declared based on 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.
5.13 Flexural bond strength
When required by national provisions valid in the intended place of use and relevant to the
application, the flexural bond strength of masonry units, in combination with mortar, shall be evaluated
and declared.
12
---------------------- Page: 13 ----------------------
EN 771-5:2003 (E)
6 Description, designation and classification of manufactured stone masonry
units
6.1 Description and designation
The description and designation of a manufactured stone masonry unit shall comprise at least the
following:
a) the number, title and date of issue of this European Standard;
b) work size dimensions and tolerance category;
c) shape and features including whether homogeneous or two-part, description of surface, and if the
area of voids exceeds 25 %;
d) normalized compressive strength of unit or materials and whether mean or characteristic value
(see 5.5);
When relevant to t
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.