SIST EN 771-4:2011
(Main)Specification for masonry units - Part 4: Autoclaved aerated concrete masonry units
Specification for masonry units - Part 4: Autoclaved aerated concrete masonry units
This European Standard specifies the characteristics and performance requirements of autoclaved aerated concrete (AAC) masonry units for which the main intended uses are different types of load bearing and nonload bearing applications in all forms of walling including single leaf, cavity, partitions, retaining, basement and general use below ground level, including walling for fire protection, thermal insulation, sound insulation and the fabric of chimneys (excluding chimney flue units). It defines the performance related to e.g. strength, density, dimensional accuracy etc. and provides for the evaluation of conformity of the product to this European Standard. The marking requirement for products covered by this European Standard is included. This European Standard does not cover the requirements for storey height panels, flue linings and masonry units with an incorporated thermal insulation material bonded to the faces of the unit susceptible to be exposed to fire. It does not specify standard sizes for autoclaved aerated concrete units nor standard work dimensions and angles of specially shaped and accessory units. It does not give permissible deviations for specially shaped and accessory units. It does not cover products intended for use as a damp proof course or the lining of a chimney.
Festlegungen für Mauersteine - Teil 4: Porenbetonsteine
Diese Europäische Norm legt die Eigenschaften und Leistungsanforderungen für dampfgehärtete Porenbeton-steine fest, die vorwiegend in tragendem oder nichttragendem Mauerwerk in Bauwerken des Hoch- oder Tief-baus verwendet werden und für alle Arten von Mauerwerk einschließlich einschaligen Mauerwerks, zweischaligen Mauerwerks, Trennwänden, Stützmauern und Fundamenten sowie für die allgemeine Verwendung unter der Erdoberfläche geeignet sind, einschließlich Brand-, Wärme- und Schallschutz. Sie werden auch zur Herstellung von Schornsteinmauerwerk (ausgenommen bei der Auskleidung von Rauch-abzügen) verwendet. Sie legt die Anforderungen, z. B. an Festigkeit, Rohdichte und Maßgenauigkeit usw., und die die Konformitäts-bewertung des von dieser Europäischen Norm erfassten Produktes fest. Die Kennzeichnung der von dieser Europäischen Norm erfassten Produkte ist festgelegt. Diese Europäische Norm gilt nicht für geschosshohe Tafeln, Steine für die Auskleidung von Rauchabzügen oder für Steine zur Herstellung von feuchtesperrenden Schichten. Sie gilt nicht für Steine mit einem Wärme-dämmstoff, der auf die Seiten des Steins, die Feuer ausgesetzt sein können, aufgebracht ist. Sie gibt weder genormte Größen für Porenbetonsteine noch Sollmaße und Winkel für Form- und Ergänzungssteine an. Sie enthält keine Grenzabmaße für Form- und Ergänzungssteine. Produkte zur Herstellung von feuchte-sperrenden Schichten oder zur Auskleidung von Schornsteinen werden nicht behandelt.
Spécifications pour éléments de maçonnerie - Partie 4 : Eléments de maçonnerie en béton cellulaire autoclave
La présente Norme européenne spécifie les caractéristiques et les exigences de performances des blocs de
maçonnerie en béton cellulaire autoclavé (BCA) dont les principales utilisations prévues sont différents types
d'applications porteuses et non porteuses sous toutes les formes de murs, y compris les murs à simple ou
double paroi, les cloisons, les murs de soutènement, les soubassements et les murs utilisés en sous-sol. Ils
peuvent constituer une protection contre l'incendie, une isolation thermique et acoustique et un chemisage
pour les conduits de fumée (excepté pour les conduits intérieurs de fumée).
Elle définit d'une part les performances relatives par exemple à la résistance, la masse volumique et les
tolérances dimensionnelles et permet d'autre part d'évaluer la conformité du produit par rapport à cette Norme
européenne.
Elle inclut également les exigences de marquage des produits qui y sont traités.
Cette Norme européenne ne couvre pas les exigences concernant les panneaux hauteur d'étage, les conduits
intérieurs de fumée ni les blocs comportant un isolant thermique rapporté sur les faces susceptibles d'être
exposées au feu. Elle ne spécifie pas les formats normalisés des blocs en béton cellulaire autoclavé, les
dimensions de fabrication courante, ni les caractéristiques angulaires des blocs de forme particulière et des
blocs accessoires. Elle ne donne pas les tolérances dimensionnelles pour les blocs de forme particulière et
les blocs accessoires. Elle ne couvre pas les produits destinés à servir d'assise anti-humidité ou de conduits
intérieurs de fumée.
Specifikacija za zidake - 4. del: Zidaki iz avtoklaviranega celičnega betona
Ta evropski standard določa značilnosti in zahteve za zmogljivosti za zidake iz avtoklaviranega celičnega betona, ki so v glavnem predvideni za uporabo pri raznovrstnih nosilnih in nenosilnih aplikacijah pri vseh oblikah sten, vključno z enoslojnim zidom, votlim zidom, predelki, opornimi stenami, kletmi in splošno uporabo pod zemljo, ki vključuje stene za zaščito pred požarom, toplotno izolacijo, zvočno izolacijo in strukturo dimnikov (razen dimnih cevi). Opredeljuje zmogljivost v zvezi z npr. močjo, gostoto, dimenzijsko natančnostjo, itd. in zagotavlja oceno skladnosti proizvoda s tem evropskim standardom. Vključena je zahteva za označevanje proizvodov, ki jih zajema ta evropski standard. Ta evropski standard ne zajema zahtev za panele etažne višine, obloge dimnih cevi in zidake z vgrajenim materialom za toplotno izolacijo, vezanim na stranice zidaka, ki so lahko izpostavljene ognju. Ne določa standardnih velikosti za zidake iz avtoklaviranega celičnega betona niti ne določa standardnih delovnih dimenzij in kotov zidakov posebnih oblik in pomožnih zidakov. Ne podaja dovoljenih odstopanj za zidake posebnih oblik in pomožne zidake. Ne zajema proizvodov, ki se uporabljajo kot izolacijska zaščita pred vlago ali obloga dimnika.
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN 771-4:2011
01-julij-2011
1DGRPHãþD
SIST EN 771-4:2004
SIST EN 771-4:2004/A1:2005
6SHFLILNDFLMD]D]LGDNHGHO =LGDNLL]DYWRNODYLUDQHJDFHOLþQHJDEHWRQD
Specification for masonry units - Part 4: Autoclaved aerated concrete masonry units
Festlegungen für Mauersteine - Teil 4: Porenbetonsteine
Spécifications pour éléments de maçonnerie - Partie 4 : Eléments de maçonnerie en
béton cellulaire autoclave
Ta slovenski standard je istoveten z: EN 771-4:2011
ICS:
91.100.30 Beton in betonski izdelki Concrete and concrete
products
SIST EN 771-4:2011 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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SIST EN 771-4:2011
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SIST EN 771-4:2011
EUROPEAN STANDARD
EN 771-4
NORME EUROPÉENNE
EUROPÄISCHE NORM
May 2011
ICS 91.100.30 Supersedes EN 771-4:2003
English Version
Specification for masonry units - Part 4: Autoclaved aerated
concrete masonry units
Spécifications pour éléments de maçonnerie - Partie 4: Festlegungen für Mauersteine - Teil 4: Porenbetonsteine
Éléments de maçonnerie en béton cellulaire autoclavé
This European Standard was approved by CEN on 17 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 771-4:2011: E
worldwide for CEN national Members.
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SIST EN 771-4:2011
EN 771-4:2011 (E)
Contents Page
Foreword .4
1 Scope .5
2 Normative references .5
3 Terms and definitions .6
4 Materials and manufacture .7
4.1 General .7
4.2 Materials of manufacture .8
5 Requirements for AAC masonry units .8
5.1 General .8
5.2 Dimensions and tolerances .8
5.2.1 Dimensions .8
5.2.2 Tolerances .9
5.3 Configuration . 10
5.4 Density . 11
5.4.1 Gross dry density . 11
5.4.2 Net dry density . 11
5.4.3 Limit deviations . 12
5.5 Compressive strength . 12
5.6 Thermal properties . 12
5.7 Durability . 12
5.8 Moisture movement . 12
5.9 Water vapour permeability . 13
5.10 Water absorption . 13
5.11 Reaction to fire . 13
5.12 Shear bond strength . 13
5.12.1 General . 13
5.12.2 Declaration based on fixed values . 13
5.12.3 Declaration based on tests . 13
5.13 Flexural bond strength . 14
6 Description, designation and classification of AAC masonry units . 14
6.1 Description and designation . 14
6.2 Classification . 14
7 Marking . 15
8 Evaluation of conformity . 15
8.1 General . 15
8.2 Initial type tests . 15
8.3 Factory production control . 16
8.3.1 General . 16
8.3.2 Testing and measuring equipment . 16
8.3.3 Production equipment . 17
8.3.4 Raw materials . 17
8.3.5 Production process . 17
8.3.6 Finished product testing . 17
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
2
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SIST EN 771-4:2011
EN 771-4:2011 (E)
Annex A (normative) Sampling for initial type testing and for independent testing of
consignments . 18
A.1 General . 18
A.2 Sampling procedure for an assessment of product compliance . 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 (normative) Cutting schemes . 20
B.1 Cutting scheme for producing cubes or prisms from AAC masonry units in order to
determine the dry density . 20
B.2 Cutting scheme for producing cubes from AAC masonry units in order to determine
compressive strength . 21
Annex C (informative) Guidance on FPC frequencies. 22
Annex ZA (informative) Clauses of this European Standard addressing the provisions of the EU
Construction Products Directive . 24
ZA.1 Scope and relevant characteristics . 24
ZA.2 Procedure(s) for attestation of conformity of autoclaved aerated concrete masonry units . 26
ZA.2.1 System(s) of attestation of conformity . 26
ZA.2.2 EC Certificate and Declaration of Conformity . 27
ZA.3 CE marking and labelling. 28
Bibliography . 32
3
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SIST EN 771-4:2011
EN 771-4:2011 (E)
Foreword
This document (EN 771-4:2011) 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 771-4:2003.
This document has been prepared under a mandate given to CEN by the European Commission and the
European Free Trade Association and supports the essential requirements of the 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 reinforced and unreinforced masonry in
Eurocode 6.
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.
4
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SIST EN 771-4:2011
EN 771-4:2011 (E)
1 Scope
This European Standard specifies the characteristics and performance requirements of autoclaved aerated
concrete (AAC) masonry units for which the main intended uses are different types of load bearing and non-
load bearing applications in all forms of walling including single leaf, cavity, partitions, retaining, basement and
general use below ground level, including walling for fire protection, thermal insulation, sound insulation and
the fabric of chimneys (excluding chimney flue units).
It defines the performance related to e.g. strength, density, dimensional accuracy etc. and provides for the
evaluation of conformity of the product to this European Standard.
The marking requirement for products covered by this European Standard is included.
This European Standard does not cover the requirements for storey height panels, flue linings and masonry
units with an incorporated thermal insulation material bonded to the faces of the unit susceptible to be
exposed to fire. It does not specify standard sizes for autoclaved aerated concrete units nor standard work
dimensions and angles of specially shaped and accessory units. It does not give permissible deviations for
specially shaped and accessory units. It does not cover products intended for use as a damp proof course or
the lining of a chimney.
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 680, Determination of the drying shrinkage of autoclaved aerated concrete
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 772-13, Methods of test for masonry units — Part 13: Determination of net and gross dry density of
masonry units (except for natural stone)
EN 772-16:2011, 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 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 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)
5
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SIST EN 771-4:2011
EN 771-4:2011 (E)
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
masonry unit
preformed component intended for use in masonry construction
3.2
autoclaved aerated concrete (AAC) masonry unit
masonry unit manufactured from hydraulic binders such as cement and/or lime, combined with siliceous
based fine material, cell generating material and water
NOTE AAC masonry units may be provided with recesses, tongued and grooved jointing systems and other
interlocking features.
3.3
co-ordinating size
size of the co-ordinating space allocated to a masonry unit including allowances for joints and tolerances
3.4
work size
size of masonry unit specified for its manufacture, to which the actual size conforms within permissible
deviations
3.5
actual size
size of a masonry unit as measured
3.6
regular shaped masonry unit
masonry unit with an overall rectangular parallelepiped shape
3.7
specially shaped masonry unit
masonry unit which is not a rectangular parallelepiped
3.8
accessory unit
masonry unit which is shaped to provide a particular function
3.9
interlocking features
shaped matched projections and indentations on masonry units, e.g. tongue and groove systems
3.10
hole
formed void which may or may not pass completely through a masonry unit
3.11
vertical perforation
formed void which passes completely through a masonry unit perpendicular to the bed face
3.12
horizontal perforation
formed void which passes completely through a masonry unit parallel to the bed faces
6
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SIST EN 771-4:2011
EN 771-4:2011 (E)
3.13
cell
formed void which does not pass through a masonry unit
3.14
recess
depression or indentation in one or more surfaces of a masonry unit (e.g. mortar pocket, rendering keyway)
3.15
griphole
hole in a masonry unit to enable it to be more readily grasped and lifted by hand or by machine
3.16
declared value
value that a manufacturer is confident of achieving, bearing in mind the precision of test and variability of the
manufacturing process
3.17
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.
3.18
Category II masonry units
units not intended to comply with the level of confidence of Category I units
3.19
normalised compressive strength of masonry units
compressive strength of masonry units converted to the air dry compressive strength of an equivalent 100 mm
wide by 100 mm high masonry unit
NOTE See procedure given in EN 772-1:2011, Annex A.
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 a 5 % fractile of the compressive strength
3.22
product group
products from one manufacturer having common values for one or more characteristics
3.23
consignment
shipment from the supplier
4 Materials and manufacture
4.1 General
AAC masonry units shall be manufactured using hydraulic binders such as cement and/or lime combined with
fine siliceous based material, cell-generating material and water and cured with high pressure steam in
autoclaves.
7
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SIST EN 771-4:2011
EN 771-4:2011 (E)
NOTE The raw materials are mixed together and cast into moulds where the mix is allowed to rise and set into cakes.
After this part of the process, the cake is cut into the required sizes of masonry units and cured.
4.2 Materials of manufacture
The following materials of manufacture combined with additives and agents where appropriate, may be used
in the manufacturing process:
siliceous based material;
cement;
lime;
water;
cell-generating material.
Other materials may also be included in the manufacturing process.
5 Requirements for AAC masonry units
5.1 General
The requirements and properties specified in this standard shall be defined in terms of 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
(see 3.7 and 3.8).
The conformity criteria given in the following subclauses 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 manufactured dimensions of an AAC masonry unit shall be declared in mm for length, width and height, in
that order.
8
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SIST EN 771-4:2011
EN 771-4:2011 (E)
Key
1 Length 3 Height 5 Face
2 Width 4 Bed 6 Header
NOTE This relates to the normal use of the masonry unit in the wall.
Figure 1 — Dimensions and surfaces
They shall be given in terms of work size.
NOTE In addition the co-ordinating size may be given.
AAC masonry units shall be sampled in accordance with Annex A and tested in accordance with EN 772-16.
The deviation of the measured dimensions from the declared dimensions shall not exceed the value given in
Table 2. The declared dimensions shall not exceed the value given in Table 1.
Table 1 — Maximum dimensions for AAC masonry units
Dimensions in millimetres
Length 1 500
Width 600
Height 1 000
5.2.2 Tolerances
5.2.2.1 Permissible deviations for regular shaped units
The permissible deviations for individual masonry units shall be as given in Table 2 for mortar specified in
accordance with EN 998-2.
9
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SIST EN 771-4:2011
EN 771-4:2011 (E)
Table 2 — Limit deviations for regular shaped units (in millimetres)
AAC units for erection with joints made of:
General purpose and Thin layer mortar
Dimensions
lightweight mortar
GPLM TLMA TLMB
Length
+3
± 3 ± 1,5
−5
Height
+3
−5 ± 2 ± 1,0
Width
± 3 ± 2 ± 1,5
Flatness of bed faces
No requirement No requirement ≤ 1,0
Plane parallelism of bed faces
No requirement No requirement ≤ 1,0
NOTE Closer tolerances may be declared by the manufacturer for one or more dimensions.
5.2.2.2 Flatness of bed faces
When AAC masonry units category TLMB, intended for use with thin layer mortar, are sampled in accordance
with Annex A and tested in accordance with EN 772-20, the deviation from flatness of the bed faces shall not
exceed the values given in Table 2.
5.2.2.3 Plane parallelism of bed faces
When AAC masonry units category TLMB, 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 f), the deviation from plane
parallelism shall not exceed the values given in Table 2.
5.2.2.4 Permissible deviations for other shaped units
The permissible deviations for non-regular units are not specified in this standard.
5.3 Configuration
For plain regular shaped units it is not necessary to specify the shape. For other units, the geometry of the unit
and the volume, direction and shape of perforation and holes shall be declared using definitions in Clause 3 or
by reference to a drawing.
NOTE AAC masonry units are generally used in conjunction with general purpose, thin layer and lightweight mortars.
The following are commonly employed:
a) Mortar joints between plain rectangular shaped AAC masonry units;
b) Tongued and grooved jointing systems using tongued and grooved AAC masonry units;
c) Mortar joints between profiled AAC masonry units where the profile is designed to accommodate mortar.
When relevant to the uses for which the unit is put on the market, the configuration shall be declared.
The declaration may be made by reference to one or another of the groups defined in EN 1996-1-1 or
EN 1996-1-2 and/or it may include one or more items such as those in the following list, as relevant:
10
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SIST EN 771-4:2011
EN 771-4:2011 (E)
shape and features, including the direction of perforations (by means of a drawing or illustration, when
relevant);
volume of all formed voids as a percentage of the length × width × height of the unit;
volume of the largest of any formed voids as a percentage of the length × width × height of the unit;
volume of grip holes as a percentage of the length × width × height of the unit;
thickness of webs;
thickness of shells;
combined thickness of webs and shells from face to face;
combined thickness of webs and shells from header to header;
area of voids on a bed face as a percentage of the length × width of the unit.
When conformity with these configuration requirements 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.
5.4 Density
5.4.1 Gross dry density
3
The gross dry density of an AAC masonry unit shall be declared in kg/m . For all plain regular shaped
masonry units, the mean gross dry density of AAC masonry units shall be determined in accordance with
EN 772-13 from units sampled in accordance with Annex A. When not using whole masonry units, these shall
be prepared in accordance with Annex B.
NOTE This declaration may be made for the evaluation of:
− loading;
− airborne sound insulation;
− thermal insulation;
− fire resistance.
In addition, the manufacturer may declare the minimum and maximum individual values of gross dry density.
5.4.2 Net dry density
When relevant to the uses for which AAC units are put on the market, the manufacturer shall declare the net
3
dry density of AAC masonry unit in kg/m . For units other than plain regular shaped units, the mean net dry
density of AAC masonry units shall be determined in accordance with EN 772-13 from units sampled in
accordance with Annex A. When not using whole masonry units, these shall be prepared in accordance with
Annex B.
3 3
NOTE The net density of AAC masonry units is usually within the range 300 kg/m to 1 000 kg/m .
In addition, the manufacturer may declare the minimum and maximum individual values of net dry density.
11
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SIST EN 771-4:2011
EN 771-4:2011 (E)
5.4.3 Limit deviations
3
The limit deviation of the measured dry density from the declared dry density shall not exceed ± 50 kg/m .
NOTE Closer deviations may be declared.
5.5 Compressive strength
2
The strength of the masonry units in compression shall be declared in N/mm by the manufacturer and shall
2
not be less than 1,5 N/mm (declared value — for definition, see 3.16). It shall be expressed as one of:
a) the mean compressive strength of the unit;
b) the characteristic compressive strength of the unit.
The manufacturer shall also declare the normalised compressive strength when relevant. EN 772-1 gives
instructions on how to convert the declared compressive strength into the normalised compressive strength.
In addition, the manufacturer shall declare whether the autoclaved aerated con
...
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Festlegungen für Mauersteine - Teil 4: PorenbetonsteineSpécifications pour éléments de maçonnerie - Partie 4 : Eléments de maçonnerie en béton cellulaire autoclaveSpecification for masonry units - Part 4: Autoclaved aerated concrete masonry units91.100.30Beton in betonski izdelkiConcrete and concrete productsICS:Ta slovenski standard je istoveten z:FprEN 771-4kSIST FprEN 771-4:2010en,fr,de01-december-2010kSIST FprEN 771-4:2010SLOVENSKI
STANDARD
kSIST FprEN 771-4:2010
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
FINAL DRAFT
FprEN 771-4
September 2010 ICS 91.100.30 Will supersede EN 771-4:2003English Version
Specification for masonry units - Part 4: Autoclaved aerated concrete masonry units
Spécifications pour éléments de maçonnerie - Partie 4 : Eléments de maçonnerie en béton cellulaire autoclave
Festlegungen für Mauersteine - Teil 4: Porenbetonsteine 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
Management Centre:
Avenue Marnix 17,
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 771-4:2010: EkSIST FprEN 771-4:2010
FprEN 771-4:2010 (E) 2 Contents Page Foreword .41 Scope .52 Normative references .53 Terms and definitions .64 Materials and manufacture .74.1 General .74.2 Materials of manufacture .85 Requirements for AAC masonry units .85.1 General .85.2 Dimensions and tolerances .85.2.1 Dimensions .85.2.2 Tolerances .95.3 Configuration . 105.4 Density . 115.4.1 Gross dry density . 115.4.2 Net dry density . 115.4.3 Limit deviations . 125.5 Compressive strength . 125.6 Thermal properties . 125.7 Durability . 125.8 Moisture movement . 125.9 Water vapour permeability . 135.10 Water absorption . 135.11 Reaction to fire . 135.12 Shear bond strength . 135.12.1 General . 135.12.2 Declaration based on fixed values . 135.12.3 Declaration based on tests . 135.13 Flexural bond strength . 146 Description, designation and classification of AAC masonry units . 146.1 Description and designation . 146.2 Classification . 147 Marking . 158 Evaluation of conformity . 158.1 General . 158.2 Initial type tests . 158.3 Factory production control . 168.3.1 General . 168.3.2 Testing and measuring equipment . 168.3.3 Production equipment . 178.3.4 Raw materials . 178.3.5 Production process . 178.3.6 Finished product testing . 178.3.7 Statistical techniques . 178.3.8 Marking and stock control of products . 178.3.9 Traceability . 178.3.10 Nonconforming products . 17kSIST FprEN 771-4:2010
FprEN 771-4:2010 (E) 3 Annex A (normative)
Sampling for initial type testing and for independent testing of consignments . 18A.1 General . 18A.2 Sampling procedure for an assessment of product compliance . 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 (normative)
Cutting schemes . 20 Cutting scheme for producing cubes or prisms from AAC masonry units in order to determine the dry density . 20B.1 20B.2 Cutting scheme for producing cubes from AAC masonry units in order to determine compressive strength . 21Annex C (informative)
Guidance on FPC frequencies. 22Annex ZA (informative)
Clauses of this European Standard addressing the provisions of the EU Construction Products Directive . 24ZA.1 Scope and relevant characteristics . 24ZA.2 Procedure(s) for attestation of conformity of autoclaved aerated concrete masonry units . 26ZA.2.1 System(s) of attestation of conformity . 26ZA.2.2 EC Certificate and Declaration of Conformity . 27ZA.3 CE marking and labelling. 28Bibliography . 32 kSIST FprEN 771-4:2010
FprEN 771-4:2010 (E) 4 Foreword This document (FprEN 771-4:2010) 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 771-4:2003. This document has been prepared under a mandate given to CEN by the European Commission and the European Free Trade Association and supports the essential requirements of the EU Construction Products Directive (89/106/EEC). For relationship with EU Directives, see informative Annex ZA which is an integral part of this document. It also takes into account the general rules for reinforced and unreinforced masonry in Eurocode 6.
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
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FprEN 771-4:2010 (E) 5 1 Scope This European Standard specifies the characteristics and performance requirements of autoclaved aerated concrete (AAC) masonry units for which the main intended uses are different types of load bearing and non-load bearing applications in all forms of walling including single leaf, cavity, partitions, retaining, basement and general use below ground level, including walling for fire protection, thermal insulation, sound insulation and the fabric of chimneys (excluding chimney flue units). It defines the performance related to e.g. strength, density, dimensional accuracy etc. and provides for the evaluation of conformity of the product to this European Standard. The marking requirement for products covered by this European Standard is included. This European Standard does not cover the requirements for storey height panels, flue linings and masonry units with an incorporated thermal insulation material bonded to the faces of the unit susceptible to be exposed to fire. It does not specify standard sizes for autoclaved aerated concrete units nor standard work dimensions and angles of specially shaped and accessory units. It does not give permissible deviations for specially shaped and accessory units. It does not cover products intended for use as a damp proof course or the lining of a chimney. 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 680, Determination of the drying shrinkage of autoclaved aerated concrete 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 772-13, Methods of test for masonry units — Part 13: Determination of net and gross dry density of masonry units (except for natural stone) EN 772-16, 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, Masonry and masonry products — Methods for determining thermal properties 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) kSIST FprEN 771-4:2010
FprEN 771-4:2010 (E) 6 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 masonry unit preformed component intended for use in masonry construction 3.2 autoclaved aerated concrete (AAC) masonry unit masonry unit manufactured from hydraulic binders such as cement and/or lime, combined with siliceous based fine material, cell generating material and water NOTE AAC masonry units may be provided with recesses, tongued and grooved jointing systems and other interlocking features. 3.3 co-ordinating size size of the co-ordinating space allocated to a masonry unit including allowances for joints and tolerances 3.4 work size size of masonry unit specified for its manufacture, to which the actual size conforms within permissible deviations 3.5 actual size size of a masonry unit as measured 3.6 regular shaped masonry unit masonry unit with an overall rectangular parallelepiped shape 3.7 specially shaped masonry unit masonry unit which is not a rectangular parallelepiped 3.8 accessory unit masonry unit which is shaped to provide a particular function 3.9 interlocking features shaped matched projections and indentations on masonry units, e.g. tongue and groove systems 3.10 hole formed void which may or may not pass completely through a masonry unit 3.11 vertical perforation formed void which passes completely through a masonry unit perpendicular to the bed face 3.12 horizontal perforation formed void which passes completely through a masonry unit parallel to the bed faces kSIST FprEN 771-4:2010
FprEN 771-4:2010 (E) 7 3.13 cell formed void which does not pass through a masonry unit 3.14 recess depression or indentation in one or more surfaces of a masonry unit (e.g. mortar pocket, rendering keyway) 3.15 griphole hole in a masonry unit to enable it to be more readily grasped and lifted by hand or by machine 3.16 declared value value that a manufacturer is confident of achieving, bearing in mind the precision of test and variability of the manufacturing process 3.17 Category I masonry units units with a declared compressive strength with a probability of failure to reach it not exceeding 5 %. This may be determined via the mean or characteristic value 3.18 Category II masonry units units not intended to comply with the level of confidence of Category I units 3.19 normalised compressive strength of masonry units compressive strength of masonry units converted to the air dry compressive strength of an equivalent 100 mm wide by 100 mm high masonry unit NOTE See procedure given in EN 772-1:2000, Annex A. 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 a 5 % fractile of the compressive strength 3.22 product group products from one manufacturer having common values for one or more characteristics 3.23 consignment shipment from the supplier 4 Materials and manufacture 4.1 General AAC masonry units shall be manufactured using hydraulic binders such as cement and/or lime combined with fine siliceous based material, cell-generating material and water and cured with high pressure steam in autoclaves. kSIST FprEN 771-4:2010
FprEN 771-4:2010 (E) 8 NOTE The raw materials are mixed together and cast into moulds where the mix is allowed to rise and set into cakes. After this part of the process, the cake is cut into the required sizes of masonry units and cured. 4.2 Materials of manufacture The following materials of manufacture combined with additives and agents where appropriate, may be used in the manufacturing process: siliceous based material; cement; lime; water; cell-generating material. Other materials may also be included in the manufacturing process. 5 Requirements for AAC masonry units 5.1 General The requirements and properties specified in this standard shall be defined in terms of 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 (see 3.7 and 3.8). The conformity criteria given in the following subclauses 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 manufactured dimensions of an AAC masonry unit shall be declared in mm for length, width and height, in that order. kSIST FprEN 771-4:2010
FprEN 771-4:2010 (E) 9
Key 1 Length 3 Height 5 Face 2 Width 4 Bed 6 Header
NOTE This relates to the normal use of the masonry unit in the wall. Figure 1 — Dimensions and surfaces They shall be given in terms of work size. NOTE In addition the co-ordinating size may be given. AAC masonry units shall be sampled in accordance with Annex A and tested in accordance with EN 772-16. The deviation of the measured dimensions from the declared dimensions shall not exceed the value given in Table 2. The declared dimensions shall not exceed the value given in Table 1. Table 1 — Maximum dimensions for AAC masonry units
Dimensions in millimetres Length 1 500 Width 600 Height 1 000
5.2.2 Tolerances 5.2.2.1 Permissible deviations for regular shaped units The permissible deviations for individual masonry units shall be as given in Table 2 for mortar specified in accordance with FprEN 998-2. kSIST FprEN 771-4:2010
FprEN 771-4:2010 (E) 10 Table 2 — Limit deviations for regular shaped units (in millimetres) Dimensions AAC units for erection with joints made of: General purpose and lightweight mortar Thin layer mortar GPLM TLMA TLMB Length +3 −5
± 3
± 1,5 Height +3 −5
± 2
± 1,0 Width ± 3 ± 2 ± 1,5 Flatness of bed faces No requirement No requirement ≤ 1,0 Plane parallelism of bed faces No requirement No requirement ≤ 1,0
NOTE Closer tolerances may be declared by the manufacturer for one or more dimensions. 5.2.2.2 Flatness of bed faces When AAC masonry units category TLMB, intended for use with thin layer mortar, are sampled in accordance with Annex A and tested in accordance with EN 772-20, the deviation from flatness of the bed faces shall not exceed the values given in Table 2. 5.2.2.3 Plane parallelism of bed faces When AAC masonry units category TLMB, intended for use with thin layer mortar, are sampled in accordance with Annex A and tested in accordance with EN 772-16 by procedure f), the deviation from plane parallelism shall not exceed the values given in Table 2. 5.2.2.4 Permissible deviations for other shaped units The permissible deviations for non-regular units are not specified in this standard. 5.3 Configuration For plain regular shaped units it is not necessary to specify the shape. For other units, the geometry of the unit and the volume, direction and shape of perforation and holes shall be declared using definitions in Clause 3 or by reference to a drawing. NOTE AAC masonry units are generally used in conjunction with general purpose, thin layer and lightweight mortars. The following are commonly employed: a) Mortar joints between plain rectangular shaped AAC masonry units; b) Tongued and grooved jointing systems using tongued and grooved AAC masonry units; c) Mortar joints between profiled AAC masonry units where the profile is designed to accommodate mortar. When relevant to the uses for which the unit is put on the market, the configuration shall be declared. The declaration may be made by reference to one or another of the groups defined in EN 1996-1-1 or EN 1996-1-2 and/or it may include one or more items such as those in the following list, as relevant: kSIST FprEN 771-4:2010
FprEN 771-4:2010 (E) 11 shape and features, including the direction of perforations (by means of a drawing or illustration, when relevant); volume of all formed voids as a percentage of the length × width × height of the unit; volume of the largest of any formed voids as a percentage of the length × width × height of the unit; volume of grip holes as a percentage of the length × width × height of the unit; thickness of webs; thickness of shells; combined thickness of webs and shells from face to face; combined thickness of webs and shells from header to header; area of voids on a bed face as a percentage of the length × width of the unit. When conformity with these configuration requirements cannot be assessed by visual inspection, masonry units shall be sampled in accordance with A.3, measured in accordance with EN 772-16 and the values calculated. 5.4 Density 5.4.1 Gross dry density The gross dry density of an AAC masonry unit shall be declared in kg/m3. For all plain regular shaped masonry units, the mean gross dry density of AAC masonry units shall be determined in accordance with EN 772-13 from units sampled in accordance with Annex A. When not using whole masonry units, these shall be prepared in accordance with Annex B. NOTE This declaration may be made for the evaluation of: − loading; − airborne sound insulation; − thermal insulation; − fire resistance. In addition, the manufacturer may declare the minimum and maximum individual values of gross dry density. 5.4.2 Net dry density When relevant to the uses for which AAC units are put on the market, the manufacturer shall declare the net dry density of AAC masonry unit in kg/m3. For units other than plain regular shaped units, the mean net dry density of AAC masonry units shall be determined in accordance with EN 772-13 from units sampled in accordance with Annex A. When not using whole masonry units, these shall be prepared in accordance with Annex B. NOTE The net density of AAC masonry units is normally within the range 300 kg/m3 to 1 000 kg/m3. In addition, the manufacturer may declare the minimum and maximum individual values of net dry density. kSIST FprEN 771-4:2010
FprEN 771-4:2010 (E) 12 5.4.3 Limit deviations The limit deviation of the measured dry density from the declared dry density shall not exceed ± 50 kg/m3. NOTE Closer deviations may be declared. 5.5 Compressive strength The strength of the masonry units in compression shall be declared in N/mm2 by the manufacturer and shall not be less than 1,5 N/mm2 (declared value — for definition, see 3.16). It shall be expressed as one of: a) the mean compressive strength of the unit; b) the characteristic compressive strength of the unit. The manufacturer shall also declare the normalised compressive strength when relevant. EN 772-1 gives instructions on how to convert the declared compressive strength into the normalised compressive strength. In addition, the manufacturer shall declare whether the autoclaved aerated concrete masonry unit is Category I or Category II (see ZA.2). If AAC masonry units are sampled from a consignment in accordance with Annex A and tested in accordance with EN 772-1, with surface preparation and conditioning as given in that document, the compressive strength shall not be less than the declared value and no individual AAC masonry unit shall have a compressive strength of less than 80 % of the mean declared value or 90 % of the characteristic declared value. When not using whole masonry units, refer to B.2 for the cutting scheme. The dimensions of such specimens shall be declared. 5.6 Thermal properties When relevant to the uses for which the unit is put on the market and in all cases for units intended to be used in elements subject to thermal requirements, the manufacturer shall provide the mean λ10,dry,unit-value and the determination model as prescribed in prEN 1745, or alternatively the unit density and configuration, shall be provided. Additionally another fractile may be provided. In such cases both the additional fractile and the corresponding λ10,dry,unit-value shall be given. When autoclaved aerated concrete masonry units are sampled in accordance with Annex A and tested in accordance with prEN 1745 following the model provided, the λ-value of the specified number of autoclaved aerated concrete masonry units shall not be greater than the λ-value provided. When relevant to the uses for which the units are put on the market, the value of the specific heat capacity of the units given in prEN 1745 may be provided. 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 Moisture movement When relevant to the uses for which the unit is put on the market and in all cas
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