SIST EN 771-2:2011+A1:2015
(Main)Specification for masonry units - Part 2: Calcium silicate masonry units
Specification for masonry units - Part 2: Calcium silicate masonry units
This European Standard 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 European Standard 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 !assessment and verification of constancy of performance (AVCP)" of the product to this European Standard. The marking requirement for products covered by this document is also included.
This European Standard 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
Ta evropski standard določa značilnosti in zahteve za zmogljivost apneno peščenih zidakov, ki so predvideni predvsem za uporabo pri zidavi notranjih sten, zunanjih sten, kleti, temeljev in zunanjosti dimnikov.
Ta evropski standard velja za vse apneno peščene zidake, vključno z zidaki nepravokotne paralelepipedne oblike, zidaki posebnih oblik in pomožnimi zidaki.
Opredeljuje zmogljivosti v zvezi z npr. močjo, gostoto in dimenzijsko natančnostjo, izmerjeno v skladu z ustreznimi preskusnimi metodami, navedenimi v ločenih evropskih standardih..
Omogoča »ocenjevanje in preverjanje nespremenljivosti zmogljivosti (AVCP)« proizvodov v skladu s tem evropskim standardom. Vključena je tudi zahteva za označevanje proizvodov, ki jih zajema ta dokument.
Ta evropski standard ne določa standardnih velikosti za opečne zidake niti ne določa standardnih delovnih dimenzij, kotov in polmerov opečnih zidakov posebnih oblik.
Ne zajema zidakov z več kot 60 % praznega prostora in proizvodov, narejenih iz skrilavca kot glavne surovine.
Ne zajema panelov etažne višine.
Ne zajema zidakov, ki se uporabljajo kot izolacijska zaščita pred vlago, zidakov z vgrajenim materialom za toplotno izolacijo, vezanim na stranice zidaka, ki so lahko izpostavljene ognju, ali zidakov za dimne cevi dimnikov.
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN 771-2:2011+A1:2015
01-oktober-2015
1DGRPHãþD
SIST EN 771-2:2011
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+A1:2015
ICS:
91.100.15 Mineralni materiali in izdelki Mineral materials and
products
SIST EN 771-2:2011+A1:2015 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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SIST EN 771-2:2011+A1:2015
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SIST EN 771-2:2011+A1:2015
EUROPEAN STANDARD
EN 771-2:2011+A1
NORME EUROPÉENNE
EUROPÄISCHE NORM
August 2015
ICS 91.100.25 Supersedes EN 771-2:2011
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 European Standard was approved by CEN on 10 March 2011 and includes Amendment 1 approved by CEN on 11 January 2015.
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, 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.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2015 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 771-2:2011+A1:2015 E
worldwide for CEN national Members.
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SIST EN 771-2:2011+A1:2015
EN 771-2:2011+A1:2015 (E)
Contents Page
European foreword .4
1 Scope .5
2 Normative references .5
3 Terms and definitions .6
4 Materials and manufacture .8
5 Requirements for calcium silicate masonry units .8
5.1 General .8
5.2 Dimensions and tolerances .9
5.2.1 Dimensions .9
5.2.2 Dimensional tolerances . 10
5.3 Configuration . 10
5.4 Dry density . 11
5.4.1 Gross dry density . 11
5.4.2 Net dry density . 11
5.5 Compressive strength . 12
5.6 Thermal properties . 12
5.7 Durability . 12
5.8 Water vapour permeability . 13
5.9 Reaction to fire . 13
5.10 Water absorption . 13
5.11 Moisture movement . 13
5.12 Bond strength . 14
5.12.1 General . 14
5.12.2 Declaration based on fixed values . 14
5.12.3 Declaration based on tests . 14
5.13 Dangerous substances . 14
6 !Description, designation, designation code and classification of calcium silicate
masonry units" . 14
6.1 Description and designation . 14
6.2 Designation codes . 15
6.3 Classification . 17
7 Marking . 17
8 !Assessment and verification of constancy of performance (AVCP)" . 17
8.1 General . 17
8.2 Product type determination . 17
8.3 Factory production control . 18
8.3.1 General . 18
8.3.2 Testing and measuring equipment . 19
8.3.3 Production Equipment . 19
8.3.4 Raw materials . 19
8.3.5 Production process . 19
8.3.6 Finished product testing . 19
8.3.7 Statistical techniques . 19
8.3.8 Marking and stock control of products . 20
8.3.9 Traceability . 20
8.3.10 Nonconforming products . 20
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SIST EN 771-2:2011+A1:2015
EN 771-2:2011+A1:2015 (E)
Annex A (normative) !Sampling for product type determination tests and for independent
testing of consignments" . 21
A.1 General . 21
A.2 Sampling procedure . 21
A.2.1 General . 21
A.2.2 Random sampling . 21
A.2.3 Representative sampling . 21
A.2.4 Dividing the sample . 22
A.2.5 Number of masonry units required for testing . 22
Annex B (normative) Cutting schemes . 24
B.1 General . 24
B.2 Representative portions for compressive strength determination . 24
B.3 Representative portions for determination of freeze-thaw resistance . 25
Annex C (normative) Tolerances on accessory units . 26
C.1 Dimensions of rectangular and non-rectangular accessory calcium silicate masonry units . 26
C.2 Tolerances for accessory calcium silicate masonry units . 28
Annex D (informative) Classification systems . 30
D.1 Classification based on compressive strength . 30
D.2 Classification based on gross dry density . 30
Annex E (informative) Guidance for test frequencies for designing a FPC system to demonstrate
conformity of finished products with the requirements of the standard and the
declaration of the manufacturer . 32
Annex ZA (informative) !Clauses of this European Standard addressing the provisions of the
EU Construction Products Regulation" . 34
ZA.1 Scope and relevant characteristics . 34
ZA.2 Procedure for AVCP of calcium silicate masonry units . 36
ZA.2.1 System(s) of AVCP . 36
ZA.2.2 Declaration of performance (DoP) . 38
ZA.3 CE marking and labelling. 42
Bibliography . 45
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SIST EN 771-2:2011+A1:2015
EN 771-2:2011+A1:2015 (E)
European foreword
This document (EN 771-2:2011+A1:2015) 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 February 2016, and conflicting national standards shall be withdrawn
at the latest by May 2017.
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 771-2:2011".
This document includes Amendment 1 approved by CEN on 2015-01-11.
The start and finish of text introduced or altered by amendment is indicated in the text by tags !".
This document has been prepared under a mandate given to CEN by the European Commission and the
European Free Trade Association, and supports !the 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."
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, 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 the United Kingdom.
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SIST EN 771-2:2011+A1:2015
EN 771-2:2011+A1:2015 (E)
1 Scope
This European Standard 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 European Standard 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 !assessment and verification of constancy of performance (AVCP)" of the product to
this European Standard. The marking requirement for products covered by this document is also included.
This European Standard 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.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated
references, only the edition cited applies. For undated references, the latest edition of the referenced
document (including any amendments) applies.
EN 772-1, Methods of test for masonry units ― Part 1: Determination of compressive strength
EN 772-2, Methods of test for masonry units ― Part 2: Determination of percentage area of voids in
aggregate concrete masonry units (by paper indentation)
EN 772-9, Methods of test for masonry units ― Part 9: Determination of volume and percentage of voids and
net volume of clay and calcium silicate masonry units by sand filling
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 772-18:2011, Methods of test for masonry units ― Part 18: Determination of freeze-thaw resistance of
calcium silicate masonry units
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 772-21, Methods of test for masonry units ― Part 21: Determination of water absorption of clay and
calcium silicate masonry units by cold water absorption
EN 1052-3, Methods of test for masonry ― Part 3: Determination of initial shear strength
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SIST EN 771-2:2011+A1:2015
EN 771-2:2011+A1:2015 (E)
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)
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
calcium silicate masonry unit
masonry unit made predominantly from lime and siliceous materials, hardened by high pressure steam
3.3
shale
fine grained sedimentary rock, finely laminated and consisting of mainly quartz and clay minerals
3.4
co-ordinating size
size of the co-ordinating space allocated to a masonry unit including allowances for joints and tolerances
3.5
work size
size of a masonry unit specified for its manufacture, to which the actual size conforms within permissible
deviations
3.6
actual size
size of a masonry unit as measured
3.7
regular shaped masonry unit
masonry unit with an overall rectangular parallelepiped shape
3.8
specially shaped masonry unit
masonry unit which is not a rectangular parallelepiped
3.9
accessory unit
masonry unit which is shaped to provide a particular function, e.g. to complete the geometry of the masonry
NOTE It may be obtained by cutting a large unit.
3.10
interlocking feature
shaped matched projections and indentations on masonry units
EXAMPLE Tongue and groove systems.
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SIST EN 771-2:2011+A1:2015
EN 771-2:2011+A1:2015 (E)
3.11
hole
formed void which may or may not pass completely through a masonry unit
3.12
perforation
formed void which passes completely through a masonry unit
3.13
cell
formed void which does not pass through a masonry unit
3.14
frog
depression formed in one or both bed faces of a unit, the total volume of all such depressions which does not
exceed a certain limit of the overall volume of the unit, i.e. length × width × height
3.15
recess
depression or indentation in one or more surfaces of a masonry unit
EXAMPLE Mortar pocket, rendering keyway.
3.16
shell
peripheral material between the hole(s) and the outer surfaces of a masonry unit
3.17
web
solid material between the holes in a masonry unit
3.18
normalized compressive strength of masonry units
compressive strength of masonry units converted to the air dry compressive strength of an equivalent 100 mm
wide and 100 mm high masonry unit
NOTE See procedure given in EN 772-1.
3.19
mean compressive strength of masonry units
arithmetic mean of the compressive strengths of masonry units
3.20
characteristic compressive strength of masonry units
compressive strength corresponding to the 5 % fractile of the compressive strength of masonry units
3.21
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
3.22
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.
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SIST EN 771-2:2011+A1:2015
EN 771-2:2011+A1:2015 (E)
3.23
Category II masonry units
units not intended to comply with the level of confidence of Category I units
3.24
combined thickness of webs and shells
sum of the thicknesses of the shells and webs from one face or header of a masonry unit to the opposite face
or header respectively along whichever path, via the formed voids, gives the smallest value, expressed as a
percentage of the unit width or length respectively
3.25
grip hole
hole in a masonry unit to enable it to be more readily grasped and lifted by hand or machine
3.26
product group
products from one manufacturer having common values for one or more characteristics
3.27
consignment
shipment from the supplier
!
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 Materials and manufacture
Calcium silicate masonry units are produced predominantly from a mixture of lime and natural siliceous
materials (sand, crushed or uncrushed siliceous gravel or rock or a mixture thereof), hardened by high
pressure steam.
Calcium silicate masonry units produced with a majority of other siliceous materials are permitted if these
materials have no deleterious effect on the properties of the product. The presence of such a material shall be
declared.
5 Requirements for calcium silicate 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.
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SIST EN 771-2:2011+A1:2015
EN 771-2:2011+A1:2015 (E)
It should be noted that the test methods are not always applicable to specially shaped and accessory units as
defined in 3.8. and 3.9.
The conformity criteria given in the following subclauses relate to !product type determination" (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 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 dimensions of a calcium silicate masonry unit shall be declared in mm for length, width and height, in that
order. They shall be given in terms of work size.
NOTE In addition the co-ordinating size may be given. See Figure 1.
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
When a specified number of calcium silicate masonry units is sampled from a consignment in accordance with
Annex A and tested in accordance with EN 772-16, the tolerances shall be indicated as in 5.2.2.1. The
determination of length, width and height shall be by one measurement taken approximately in the centre of
each specimen (EN 772-16:2011, 7.1, procedure d)). When there is a need to exclude irregular surfaces
(tongues and grooves, grip holes, etc.) in providing the dimension, EN 772-16:2011 procedure e) shall be
used.
Dimensions and tolerances of accessory units need only be declared by the manufacturer, if the accessory
units are placed on the market as individual products and do not form part of a customised consignment.
When a specified number of accessory units is sampled from a consignment in accordance with Annex A,
dimensions and tolerances shall be as given in Annex C.
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SIST EN 771-2:2011+A1:2015
EN 771-2:2011+A1:2015 (E)
5.2.2 Dimensional tolerances
5.2.2.1 Tolerances
The dimensional tolerance category shall be declared in accordance with Table 1. The actual deviations for
the mean length, width and height and the actual deviations for individual length, width and height shall not be
greater than the permissible deviations as specified in Table 1 for the declared dimensional tolerance
category.
Actual deviations for the mean are differences between declared work sizes and the mean measured values.
Actual deviations for individual values are differences between the mean measured values and the measured
individual values.
These dimensional tolerances shall not apply to the direction perpendicular to a treated face of a sliced,
fractured or structured unit.
Table 1 — Dimensional tolerance categories and tolerances for calcium silicate
masonry units (in millimetres)
Dimensional tolerance categories for calcium silicate masonry units
Dimensions
T1 T2 T3 Tm
Mean height of sample work size height work size height —
± 2 ± 1
Mean length of sample work size length work size length work size length
± 2 ± 2 ± 2
Mean width of sample work size width work size width work size width
± 2 ± 2 ± 2
!a deviation in mm
declared by the
Individual height mean height of mean height of work size height
manufacturer (may be
sample ± 2 sample ± 1,0 ± 1,0
closer or wider than the
Individual length mean length of mean length of work size length
other categories)"
sample ± 2 sample ± 2 ± 3
Individual width mean width of mean width of work size width
sample ± 2 sample ± 2 ± 3
Flatness of bed faces — — 1,0
Plane parallelism of bed faces — — 1,0
5.2.2.2 Flatness of bed faces
When calcium silicate masonry units are sampled from a consignment 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 declared
value.
5.2.2.3 Plane parallelism of bed faces
When calcium silicate masonry units are sampled from a consignment in accordance with Annex A and tested
in accordance with EN 772-16:2011 by procedure d), the deviation from plane parallelism shall not exceed the
declared value.
5.3 Configuration
When relevant to the uses, for which calcium silicate masonry units are 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
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SIST EN 771-2:2011+A1:2015
EN 771-2:2011+A1:2015 (E)
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:
— shape and features, including th
...
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