EN 771-4:2011/FprA1
(Amendment)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 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.
Festlegungen für Mauersteine - Teil 4: Porenbetonsteine
Spécifications pour éléments de maçonnerie - Partie 4: Éléments de maçonnerie en béton cellulaire autoclavé
Specifikacija za zidake - 4. del: Zidaki iz avtoklaviranega celičnega betona
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
01-oktober-2014
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: Éléments de maçonnerie en
béton cellulaire autoclavé
Ta slovenski standard je istoveten z: EN 771-4:2011/FprA1
ICS:
91.100.30 Beton in betonski izdelki Concrete and concrete
products
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EUROPEAN STANDARD
FINAL DRAFT
EN 771-4:2011
NORME EUROPÉENNE
EUROPÄISCHE NORM
FprA1
July 2014
ICS 91.100.30
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 draft amendment is submitted to CEN members for unique acceptance procedure. It has been drawn up by the Technical Committee
CEN/TC 125.
This draft amendment A1, if approved, will modify the European Standard EN 771-4:2011. If this draft becomes an amendment, CEN
members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for inclusion of this amendment
into the relevant national standard without any alteration.
This draft amendment 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-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, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United
Kingdom.
Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are aware and to
provide supporting documentation.
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
CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2014 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 771-4:2011/FprA1:2014 E
worldwide for CEN national Members.
Contents
Page
Foreword .3
1 Modification to Foreword .4
2 Modification to the Scope .4
3 Modification to 3.2 .4
4 Modification to 4.1, General .4
5 Modification to 5.1, General .4
6 Modification to 5.4.2, Net dry density .4
7 Modification to 5.5, Compressive strength .5
8 Modification to 5.10, Water absorption.5
9 Modification to 5.11, Reaction to fire .5
10 Addition of a subclause 5.14 .5
11 Modification to 6.1, Description and designation .6
12 Modification to Clause 8, Evaluation of conformity .6
13 Modification to 8.1, General .6
14 Modification to 8.2, Initial type tests .6
15 Modification to 8.3.1, General .7
16 Modification to 8.3.10, Nonconforming products .8
17 Modification to Annex A .8
18 Modification to A.1 .8
19 Modification to A.2.1 .8
20 Modification to A.2.5 .8
21 Modification to Annex ZA .9
Foreword
This document (EN 771-4:2011/FprA1:2014) 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 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.
NOTE Due to fact that the Framework Partnership Agreement between the Commission and CEN & CENELEC is not
signed yet, there are currently no New Approach Consultants in place for 2014. Therefore the provisions of CEN-
CENELEC Guide 15 cannot be met.
This shall not prevent the processing of draft standards nor the offering of harmonized standards to the Commission. In
particular, draft standards can be sent to vote without Consultant assessment.
This note will be removed from the Foreword of the finalized publication.
1 Modification to Foreword
th
th
Replace the 5 and the 6 paragraphs with the following:
“This document has been prepared under a mandate given to CEN by the European Commission and the
European Free Trade Association and supports basic requirements for construction works of the EU
Construction Products Regulation (Regulation (EU) No 305/2011).
For relationship with EU Regulation/Directive(s), see informative Annex ZA, which is an integral part of this
document.".
2 Modification to the Scope
st
Add the following paragraph after the 1 paragraph:
“This European Standard includes AAC masonry units with an incorporated insulation not exposed to fire, and
masonry units of an overall rectangular parallelepiped shape, especially shaped and accessory units. AAC
masonry units may consist of layers of different densities where not all of the layers are loadbearing.”.
nd rd
Replace the 2 and 3 paragraphs with the following:
“It provides for the assessment and verification of constancy of performance (AVCP) of the product to this
European Standard.
The marking requirement for products covered by this European Standard is included.”.
3 Modification to 3.2
Replace the existing definition 3.2 with:
“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 and cured with high pressure steam in autoclaves
Note 1 to entry: AAC masonry units may be provided with recesses, tongued and grooved jointing systems and other
interlocking features and different hollow forms such as units with a ‘U’ shape or with vertical or rectangular perforation.”.
4 Modification to 4.1, General
Replace the NOTE with the following:
“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 in autoclaves.”.
5 Modification to 5.1, General
rd
In the 3 paragraph, replace “relates to initial type testing“ with “relate to product type determination.”.
6 Modification to 5.4.2, Net dry density
Replace the NOTE with the following:
“NOTE The net density of AAC masonry units is normally less than 1 000 kg/m .”.
7 Modification to 5.5, Compressive strength
st 2
In the 1 paragraph, add “for loadbearing masonry” after "1,5 N/mm " to read:
“The strength of the masonry units in compression shall be declared in N/mm by the manufacturer and shall
not be less than 1,5 N/mm for loadbearing masonry (declared value — for definition see 3.15) It shall be
expressed as one of:”
rd
Replace the 3 paragraph with the following:
“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 the compressive strength shall not be less than the
declared value and no individual masonry unit measured within the test sample shall have a compressive
strength of less than 80 % of the mean declared value or 90 % of the characteristic declared value. When
units are conditioned in accordance with 7.3.3 b) the values shall be brought to the air dry condition in
accordance with EN 772-1:2011, Annex A.”.
8 Modification to 5.10, Water absorption
st
In the 1 paragraph, replace “put” with “placed”.
9 Modification to 5.11, Reaction to fire
st
In the 1 paragraph, add “AAC masonry” after "for" to read:
“For AAC masonry units intended to be used in elements subject to fire requirements the manufacturer shall
declare the reaction to fire classification of the masonry unit.”.
10 Addition of a subclause 5.14
Add a new clause:
“5.14 Dangerous substances
National regulations on dangerous substances may require verification and declaration on release, and
sometimes content, when construction products covered by this standard are placed on those markets.
In the absence of European harmonized test methods, verification and declaration on release/content should
be done taking into account national provisions in the place of use.
NOTE An informative database covering European and national provisions on dangerous substances is available at
the Construction web site on EUROPA accessed through: http://ec.europa.eu/enterprise/construction/cpd-ds/.".
11 Modification to 6.1, Description and designation
Replace the NOTE with the following:
“NOTE 1 Refer to clause ZA.3 for (CE) marking.".
12 Modification to Clause 8, Evaluation of conformity
Replace the title with the following:
“Assessment and verification of constancy of performance (AVCP)”.
13 Modification to 8.1, General
Replace the text 8.1 with the following:
"The manufacturer shall demonstrate compliance of this product with the requirements of this European
Standard and with the declared performance for the product properties by carrying out both:
product type determination (see 8.2), which can be physical testing, calculation, reference to tabulated
values or combinations of these methods;
factory production control (see 8.3).
Alternative methods of test to the reference methods in this European Standard may be adopted except for
the product type determination tests and in case of dispute, provided that these alternative methods satisfy the
following:
a) a relationship can be shown to exist between the results from the test and those from alternative test;
b) a safe relationship can be demonstrated when using the alternative method compared to the reference
methods and
c) the information on which the relationship is based is available for inspection.”.
14 Modification to 8.2, Initial type tests
Replace 8.2 with the following:
“8.2 Product type determination
After completion of the development of a new product type and before placing on the market, appropriate
product type determination tests shall be carried out to confirm that the achieved properties of the product
meet the requirements of this standard and the performance of the characteristics to be declared for it by the
manufacturer.
Whenever a major change in the source, blend, or nature of raw materials occurs, or when there is a change
in processing conditions, leading to what the manufacturer considers will constitute a new product type being
produced, the appropriate product type determination shall be repeated.
The manufacturer may define product groups. The product group may differ according to the characteristics in
question.
In the product type determination process a manufacturer may take in consideration already existing results.
A manufacturer may use the product type deter
...
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