SIST EN 771-2:2011/kFprA1:2014

Specification for masonry units - Part 2: Calcium silicate masonry units

This document specifies the characteristics and performance requirements of calcium silicate masonry units for which the main intended uses are inner walls, outer walls, cellars, foundations and external chimney masonry. This document is intended to apply to all calcium silicate masonry units, including those of an overall nonrectangular parallelepiped shape, specially shaped and accessory units.It defines the performance related to e.g. strength, density and dimensional accuracy, measured according to the corresponding test methods contained in separate European Standards. It provides for the evaluation of conformity of the product to this European Standard. The marking requirement for products covered by this document is also included. This document does not specify standard sizes for calcium silicate masonry units, nor standard work dimensions and angles of specially shaped and accessory units. It does not cover units with more than 60 % volume of voids, nor products made from shale as a major raw material. It does not cover storey height panels. It does not cover units intended for use as a damp proof course, nor units with an incorporated thermal insulation material bonded to the faces of the unit susceptible to be exposed to fire nor chimney flue units.

Festlegungen für Mauersteine - Teil 2: Kalksandsteine

Spécifications pour éléments de maçonnerie - Partie 2: Eléments de maçonnerie en silico-calcaire

Specifikacija za zidake - 2. del: Apneno peščeni zidaki

General Information

• Status: Not Published
• Public Enquiry End Date: 29-Oct-2014
• ICS: 91.100.15 - Mineral materials and products
• Technical Committee: CAA - Mineral binders and masonry
• Current Stage: 5520 - Unique Acceptance Procedure (UAP) (Adopted Project)
• Start Date: 18-Aug-2014
• Due Date: 05-Jan-2015
• Completion Date: 18-Dec-2014
• Directive: 305/2011 - Regulation (eu) No 305/2011 of the European Parliament and of the Council of 9 march 2011 laying down harmonised conditions for the marketing of construction products and repealing council directive 89/106/eec
• Directive: 89/106/EEC - Construction products
• Mandate: M/116 - Mandate to CEN/CENELEC concerning the execution of standardization work for harmonized standards on masonry and related products
• Ref Project: EN 771-2:2011/FprA1 - Specification for masonry units - Part 2: Calcium silicate masonry units

Relations

• Consolidated By: SIST EN 771-2:2011+A1:2015 - Specification for masonry units - Part 2: Calcium silicate masonry units
• Effective Date: 18-Jan-2023
• Amends: SIST EN 771-2:2011 - Specification for masonry units - Part 2: Calcium silicate masonry units
• Effective Date: 01-Oct-2014
• Consolidated By: SIST EN 771-2:2011+A1:2015 - Specification for masonry units - Part 2: Calcium silicate masonry units
• Effective Date: 19-Jan-2023
• Amends: SIST EN 771-2:2011 - Specification for masonry units - Part 2: Calcium silicate masonry units
• Effective Date: 08-Jun-2022

Standards Content (Sample)

SLOVENSKI STANDARD
SIST EN 771-2:2011/kFprA1:2014
01-oktober-2014
6SHFLILNDFLMD]D]LGDNHGHO$SQHQRSHãþHQL]LGDNL
Specification for masonry units - Part 2: Calcium silicate masonry units
Festlegungen für Mauersteine - Teil 2: Kalksandsteine
Spécifications pour éléments de maçonnerie - Partie 2: Eléments de maçonnerie en
silico-calcaire
Ta slovenski standard je istoveten z: EN 771-2:2011/FprA1
ICS:
91.100.15 Mineralni materiali in izdelki Mineral materials and
products
SIST EN 771-2:2011/kFprA1:2014 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------

SIST EN 771-2:2011/kFprA1:2014

---------------------- Page: 2 ----------------------

SIST EN 771-2:2011/kFprA1:2014

EUROPEAN STANDARD
FINAL DRAFT
EN 771-2:2011
NORME EUROPÉENNE

EUROPÄISCHE NORM
FprA1
July 2014
ICS 91.100.25
English Version
Specification for masonry units - Part 2: Calcium silicate
masonry units
Spécifications pour éléments de maçonnerie - Partie 2: Festlegungen für Mauersteine - Teil 2: Kalksandsteine
Eléments de maçonnerie en silico-calcaire
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 771-2:2011. 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 771-2:2011/FprA1:2014 E
worldwide for CEN national Members.

---------------------- Page: 3 ----------------------

SIST EN 771-2:2011/kFprA1:2014
EN 771-2:2011/FprA1:2014 (E)
Contents
Page
Foreword .3
1 Modification to the Foreword .4
2 Modification to the Scope .4
3 Modifications to Clause 3, Terms and definitions .4
4 Modification to 5.1, General .4
5 Modification to 5.2.2.1, Tolerances .4
6 Modification to 5.5, Compressive strength .4
7 Modification to 5.7, Durability .4
8 Addition of a new subclause 5.13 .5
9 Modification to Clause 6, Description, designation and classification of calcium silicate
masonry units .5
10 Addition of a new subclause 6.2 .5
11 Modification to Clause 8, Evaluation of conformity .7
12 Modification to 8.1, General .7
13 Modification to 8.2, Initial type tests .7
14 Modification to 8.3.1, General .8
15 Modification to 8.3.10, Nonconforming products .8
16 Modification to Annex A .8
17 Modification to A.1 .8
18 Modification to A.2.5 .8
19 Modification to Annex ZA .9

2

---------------------- Page: 4 ----------------------

SIST EN 771-2:2011/kFprA1:2014
EN 771-2:2011/FprA1:2014 (E)
Foreword
This document (EN 771-2:2011/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.

3

---------------------- Page: 5 ----------------------

SIST EN 771-2:2011/kFprA1:2014
EN 771-2:2011/FprA1:2014 (E)
1 Modification to the Foreword
th
In the 5 paragraph, replace “the essential requirements of the EU Construction Products Directive
(89/106/EEC).” with “basic requirements for construction works of the EU Construction Products Regulation
(Regulation (EU) No 305/2011).”.
th
Replace the 6 paragraph with the following:
“For relationship with EU Regulation/Directive(s), see informative Annex ZA, which is an integral part of this
document.”.
2 Modification to the Scope
th
In the 4 paragraph, replace “evaluation of conformity“ with “assessment and verification of constancy of
performance (AVCP)”.
3 Modifications to Clause 3, Terms and definitions
Add new clauses:
“3.28
protected masonry
masonry (walls, columns or partitions) which is protected against water penetration and is not in contact with
soil and ground water
Note 1 to entry: It can either be masonry in external walls which is protected, (e.g. by a layer of suitable render or by
cladding), or it can be the inner leaf of a cavity wall or it can be an internal wall. It may or may not be loadbearing.
3.29
unprotected masonry
masonry (walls, columns or partitions) which may be exposed to rain, freeze/thaw and/or may be in contact
with soil and ground water without a suitable protection
Note 1 to entry: It can either be masonry in external walls which is fully unprotected, or which is intended to be
provided by a limited protection (e.g. by a thin layer of render). It may or may not be loadbearing”.
4 Modification to 5.1, General
rd
In the 3 paragraph, replace “to initial type testing“ with “to product type determination”.
5 Modification to 5.2.2.1, Tolerances
Replace the text in the last column of Table 1 with the following:
“a deviation in mm declared by the manufacturer (may be closer or wider than the other categories)”.
6 Modification to 5.5, Compressive strength
In the NOTE, delete “for the purpose of CE marking”.
7 Modification to 5.7, Durability
st
Replace the 1 paragraph with the following:
“For calcium silicate masonry units intended to be used where there is a risk of freezing and thawing while in a
wet condition, the manufacturer shall declare the freeze/thaw resistance category according to Table 2.”.
4

---------------------- Page: 6 ----------------------

SIST EN 771-2:2011/kFprA1:2014
EN 771-2:2011/FprA1:2014 (E)
8 Addition of a new subclause 5.13
Add a new clause:
“5.13 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/.".
9 Modification to Clause 6, Description, designation and classification of calcium
silicate masonry units
Replace the heading with the following:
“Description, designation, designation code and classification of calcium silicate masonry units”.
10 Addition of a new subclause 6.2
Add a new subclause 6.2 and update numbering:
“6.2 Designation codes
A designation code may be used as part of the designation as shown in Table 3.
Table 3 — Definition of the designation code
Clause in the Position in the
Characteristic Unit Code
standard designation code
unit type 1 – CS
P or U
P: intended to be
used for protected
masonry
intended use 2 –
U: intended to be
used for
unprotected
masonry
3.22 Category I
masonry units
category 3 – I or II
3.22 Category II
masonry units
mean compressive
2
N/mm
1)
strength
**,*/**,*
5.5 Compressive
or
4
type of specimen
strength
– **,*p**,*
(/ = whole unit or
p = cut prism)
5

---------------------- Page: 7 ----------------------

SIST EN 771-2:2011/kFprA1:2014
EN 771-2:2011/FprA1:2014 (E)
normalised
2
compressive
N/mm
1)
strength
min. and max. gross
5.4.1 Gross dry
3
dry density 5
kg/m xxxx − yyyy
density
(given as range)
5.2.1 Dimensions 6 mm
l × w × t llll × www × ttt
5.2.2 Dimensional dimensional 2)
no fixed position – T1, T2 or T3
tolerances tolerance category
3)
5.3 Configuration illustration or group no fixed position – G1, G1S or G2
freeze/thaw
5.7 Durability no fixed position – F1 or F2
category
5.9 Reaction to fire class no fixed position – A1
initial shear strength B**,*/- (GPM only),
for general purpose B-/**,* (TLM only)
2
5.12 Bond strength no fixed position
N/mm or “-“
(GPM) and/or thin or
layer mortar (TLM) B**,*/**,* (both)
5.10 Water
W
no fixed position % W**
s
absorption
5.8 Water vapour water vapour
no fixed position – V*/**
permeability diffusion coefficient
thermal conductivity
5.6 Thermal
no fixed position W/mK Lx,xx
λ
properties
10,dry,unit
1) by default the direction of load is perpendicular to bed faces, for other directions the designation code is not applicable
2) designation code is not applicable in case of category Tm
3) by reference to EN 1996-1-1 resp. EN 1996-1-2

The characteristics shall be given in the given order (fixed positions) except for those characteristics with no
fixed position. “NPD” is expressed by omitting the respective characteristic.
NOTE 1 NPD means ‘No Performance Determined. For the use of NPD option see annex ZA.
NOTE 2 A designation code for a calcium silicate masonry unit (CS) where the following characteristics are declared:
Intended use: P
Category I
2
Mean compressive strength 25,0 N/mm
Type of specimen cut prism
2
Normalised compressive strength 20,0 N/mm
3 3
Gross dry density range 2 010 kg/m – 2 200 kg/m
Dimensions (length × width × height) 998 mm × 175 mm × 623 mm
Dimensional tolerance category T3
Unit Group G1
Reaction to fire A1
2
Bond strength (initial shear strength) GPM: 0,15 N/mm
2
TLM: 0,35 N/mm

will be the following one
CS P I 25,0p20,0 2010-2200 998x175x623 T3 G1 A1 B0,15/0,35".

6

---------------------- Page: 8 ----------------------

SIST EN 771-2:2011/kFprA1:2014
EN 771-2:2011/FprA1:2014 (E)
11 Modification to Clause 8, Evaluation of conformity
Replace the title with the following:
“Assessment and verification of constancy of performance (AVCP)”.
12 Modification to 8.1, General
st
In the 1 paragraph, replace “values” with “performance”.
st
In the 1 indent, replace “initial type testing of the product” with “product type determination”.
nd
Replace the 2 paragraph with the following:
“Alternative methods of test to the reference methods specified 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:”.
13 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 shall be carried out to confirm that the properties predicted from the development
meet the requirements of this standard and the performance of the characteristics to be declared for the
product.
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 determination results determined by someone else (e.g. another
manufacturer or a Research, Technology & Development service provider) to justify his own declaration of
performance regarding a product that is manufactured according to the same design and with raw materials,
constituents and manufacturing methods of the same kind, provided that permission is given by the owner of
the results, and the results are valid for both products.
The tests to be conducted shall be the tests or calculations as described in Table A.1 for the properties
selected from the following list relevant to the manufacturer’s declaration for the product type’s intended use:
 dimensions and dimensional tolerances;
 configuration;
 gross dry density;
 net dry density;
 compressive strength;
7

---------------------- Page: 9 ----------------------

SIST EN 771-2:2011/kFprA1:2014
EN 771-2:2011/FprA1:2014 (E)
 thermal properties;
 durability;
 water vapour permeability;
 water absorption;
 bond strength
Sampling for product type determination shall be in accordance with Annex A.
The results of type tests shall be recorded.
NOTE For the performance characteristics to be determined in order to address the Declaration of Performance and
CE marking provisions, see Table ZA.1.1 and Table ZA.1.2.”.
14 Modification to 8.3.1, General
st
In the 1 paragraph, replace “values” with “performance of the characteristics”.
15 Modification to 8.3.10, Nonconforming products
st
Replace the 1 paragraph with:
“The procedure for dealing with nonconforming products shall be documented. Products that do not conform
with the requirements or the performances of the product type shall be segregated and marked accordingly.
However, these products may be reassessed by the manufacturer and assigned to a different product type.”.
16 Modification to Annex A
Replace the title with the following:
“Sampling for product type determination tests and for independent testing of consignments”.
17 Modification to A.1
Replace A.1 with the following:
“A.1 General
This sampling procedure shall apply for product type determination tests and in the event that there is a
requirement for an assessment of product compliance.
Only those characteristics declared by the manufacturer shall be assessed by this procedure.
The number of calcium silicate masonry units required to determine compliance with the specification shall be
3
sampled from a consignment no greater than 20 m (see Table A.1).”.
18 Modification to A.2.5
Replace the existing A.2.5 with the following:
“A.2.5 Number of masonry units required for testing
The sample size for each test shall be in accordance with Table A.1.
8

---------------------- Page: 10 ----------------------

SIST EN 771-2:2011/kFprA1:2014
EN 771-2:2011/FprA1:2014 (E)
Table A.1 — Number of units required for tests
Clause
Property Test method Remarks
No.
  Number of units required for sample. If Annex B is ap-
plicable, the number of units in brackets is to be used.
Dimensions 5.2 EN 772-16 6 For accessory units no
minimum requirement
Configuration 5.3 EN 772-2, EN 772-9, –
EN 772-16
Flatness of bed 5.2.2.2 EN 772-20 3 –
faces
Plane parallelism 5.2.2.3 EN 772-16 3 –
of bed faces
Dry density 5.4 EN 772-9 6 (3) –
EN 772-13
Compressive 5.5 EN 772-1 6 (3) 10 (5) If the coefficient of variation is
strength known to be greater than 15 %,
the number of units shall be 10.
Thermal properties 5.6 EN 1745 3 –
Durability against 5.7 EN 772-18 12 (6) Only half of the sample will be
freeze/thaw tested. The other half of the
sample is for eventual testing
of loss of compressive strength
(see EN 772-18)
Water absorption 5.10 EN 772-21 6 (3) –
Moisture 5.11 National provision in – –
movement place of use of unit
Bond strength 5.12 EN 1052-3 Type I Type II –
specimen specimen
Procedure A 27 18
Procedure B 18 12
Dangerous 5.13 National provision in National provisions –
substances place of use of unit
NOTE Additional units should be taken to allow for any damage that may occur in transit to the testing laboratory. If
appropriate, e.g. when the units are not affected by a test procedure, the same units may be used for different tests.
”.
19 Modification to Annex ZA
Replace Annex ZA with the following new annex:
“
9

---------------------- Page: 11 ----------------------

SIST EN 771-2:2011/kFprA1:2014
EN 771-2:2011/FprA1:2014 (E)
Annex ZA
(informative)

Clauses of this European Standard addressing the provisions of the EU
Construction Products Regulation
ZA.1 Scope and relevant characteristics
This European Standard has been prepared under Mandate M/116 (as amended) "Masonry and related
products" given to CEN by the European Commission and the European Free Trade Association.
If this European standard is cited in the Official Journal of the European Union (OJEU), the clauses of this
standard, shown in this annex, are considered to meet the provisions of the relevant mandate, under the
Regulation (EU) No. 305/2011.
This annex deals with the CE marking of the calcium silicate masonry units intended for the uses indicated in
Table ZA.1.1 and Table ZA.1.2 and shows the relevant clauses applicable.
This annex has the same scope as in Clause 1 of this standard related to the aspects covered by the mandate
and is defined by Table ZA.1.1 and Table ZA.1.2.
Table ZA.1.1 — Relevant clauses for calcium silicate masonry units
in protected masonry walls, columns and partitions
Product: Calcium silicate masonry units
Intended use: In protected masonry walls, columns and partitions
Clauses in this European Regulatory
Essential Characteristics Standard related to levels an
...