SIST EN 771-3:2011+A1:2015
(Main)Specification for masonry units - Part 3: Aggregate concrete masonry units (Dense and lightweight aggregates)
Specification for masonry units - Part 3: Aggregate concrete masonry units (Dense and lightweight aggregates)
This European Standard specifies the characteristics and performance requirements of aggregate concrete masonry units made from dense and lightweight aggregates or a combination of both for which the main intended uses are common, facing or exposed masonry in load bearing or non-load bearing building and civil engineering applications. The units are suitable for all forms of walling, including single leaf, external leaf to chimneys, cavity wall, partitions, retaining, and basement. They can provide fire protection, thermal insulation, sound insulation and sound absorption.
This European Standard includes aggregate concrete masonry units of an overall non-rectangular parallelepiped shape, !specially" shaped and accessory units.
It defines the performance related to e.g. strength, density, dimensional accuracy, and 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.
This European Standard does not specify standard sizes for aggregate concrete masonry units, nor standard work dimensions and angles of specially shaped aggregate concrete masonry units. It does not cover storey height panels, chimney flue linings nor units intended for use as a damp proof course. It does not cover units with an incorporated thermal insulation material bonded to the faces of the unit susceptible to be exposed to fire.
Festlegungen für Mauersteine - Teil 3: Mauersteine aus Beton (mit dichten und porigen Zuschlägen)
Spécifications pour éléments de maçonnerie - Partie 3: Éléments de maçonnerie en béton de granulats (granulats courants et légers)
Specifikacija za zidake - 3. del: Betonski zidaki (kompaktni in lahki agregati)
Ta evropski standard določa značilnosti in zahteve za zmogljivost betonskih zidakov, narejenih iz kompaktnih in lahkih agregatov ali kombinacije obojega, ki so predvideni predvsem za uporabo pri splošni, fasadni in izpostavljeni zidavi pri nosilnih ali nenosilnih visokih ali nizkih gradnjah. Zidaki so primerni za vse oblike sten, vključno z enojnim slojem in zunanjim slojem pri dimnikih, votlih zidovih, predelkih, opornih zidovih in kleteh. Zagotavljajo lahko zaščito pred požarom, toplotno izolacijo, zvočno izolacijo in zvočno absorpcijo.
Ta evropski standard vključuje betonske zidake nepravokotnih paralelepipednih oblik, zidake »posebnih« oblik in pomožne zidake.
Opredeljuje zmogljivost v zvezi z npr. močjo, gostoto in dimenzijsko natančnostjo ter omogoča ocenjevanje in preverjanje nespremenljivosti zmogljivosti (AVCP) proizvodov v skladu s tem evropskim standardom. Vključena je zahteva za označevanje proizvodov, ki jih zajema ta evropski standard.
Ta evropski standard ne določa standardnih velikosti za betonske zidake niti ne določa standardnih delovnih dimenzij in kotov betonskih zidakov posebnih oblik. Ne zajema panelov etažne višine, oblog za dimne cevi za dimnike ali zidakov, ki se uporabljajo kot izolacijska zaščita pred vlago. Ne zajema zidakov z vgrajenim materialom za toplotno izolacijo, vezanim na stranice zidaka, ki so lahko izpostavljene ognju.
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
01-oktober-2015
1DGRPHãþD
SIST EN 771-3:2011
Specifikacija za zidake - 3. del: Betonski zidaki (kompaktni in lahki agregati)
Specification for masonry units - Part 3: Aggregate concrete masonry units (Dense and
lightweight aggregates)
Festlegungen für Mauersteine - Teil 3: Mauersteine aus Beton (mit dichten und porigen
Zuschlägen)
Spécifications pour éléments de maçonnerie - Partie 3: Éléments de maçonnerie en
béton de granulats (granulats courants et légers)
Ta slovenski standard je istoveten z: EN 771-3:2011+A1:2015
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
EN 771-3:2011+A1
NORME EUROPÉENNE
EUROPÄISCHE NORM
August 2015
ICS 91.100.30 Supersedes EN 771-3:2011
English Version
Specification for masonry units - Part 3: Aggregate concrete
masonry units (Dense and lightweight aggregates)
Spécifications pour éléments de maçonnerie - Partie 3: Festlegungen für Mauersteine - Teil 3: Mauersteine aus
Éléments de maçonnerie en béton de granulats (granulats Beton (mit dichten und porigen Zuschlägen)
courants et légers)
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 771-3:2011+A1:2015 E
worldwide for CEN national Members.
Contents Page
European foreword .4
1 Scope .5
2 Normative references .5
3 Terms, definitions and symbols .6
3.1 Terms and definitions .6
3.2 Symbols .8
4 Materials .8
5 Requirements for aggregate concrete masonry units .9
5.1 General .9
5.2 Dimensions and tolerances .9
5.2.1 Dimensions .9
5.2.2 Dimensional tolerances . 10
5.3 Configuration and appearance . 10
5.3.1 Configuration . 10
5.3.2 Appearance . 11
5.4 Density . 11
5.4.1 Gross dry density of the units . 11
5.4.2 Net dry density of the concrete . 12
5.4.3 Tolerances . 12
5.5 Mechanical strength . 12
5.5.1 Compressive strength . 12
5.5.2 Bending tensile strength . 13
5.6 Thermal properties . 13
5.7 Durability . 13
5.8 Water absorption by capillarity . 14
5.9 Moisture movement . 14
5.10 Water vapour permeability . 14
5.11 Reaction to fire . 14
5.12 Shear bond strength . 14
5.12.1 General . 14
5.12.2 Declaration based on fixed values . 15
5.12.3 Declaration based on tests . 15
5.13 Flexural bond strength . 15
5.14 Dangerous substances . 15
6 Description, designation and classification of aggregate concrete masonry units . 15
6.1 Description and designation of units . 15
6.2 Classification . 16
7 Marking . 16
8 !Assessment and verification of constancy of performance (AVCP)" . 16
8.1 General . 16
8.2 !Product type determination" . 17
8.3 Factory production control . 18
8.3.1 General . 18
8.3.2 Testing and measuring equipment . 18
8.3.3 Production equipment . 18
8.3.4 Raw materials . 18
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 . 19
8.3.9 Traceability . 19
8.3.10 Nonconforming products . 19
Annex A (normative) !Sampling for determination of product type and for independent testing
of consignments" . 20
A.1 General . 20
A.2 Sampling procedure . 20
A.2.1 General . 20
A.2.2 Random sampling . 20
A.2.3 Representative sampling . 20
A.2.4 Dividing the sample . 21
A.2.5 Number of units required for testing . 21
A.3 Place and dates of inspection and testing . 22
Annex B (normative) !Compliance criteria for product type determination and for independent
testing of consignments" . 23
B.1 Dimensions and tolerances (see 5.2) . 23
B.2 Configuration and appearance (see 5.3) . 23
B.3 Density (see 5.4) . 23
B.4 Mechanical strength (see 5.5) . 23
B.4.1 Characteristic strength . 23
B.4.2 Mean strength . 23
B.5 Moisture movement and water absorption by capillarity (see 5.9 and 5.8) . 23
Annex C (informative) Examples of different shapes of aggregate concrete masonry units . 27
Annex D (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 . 28
Annex ZA (informative) !Clauses of this European Standard addressing the provisions of the
EU Construction Products Directive" . 30
ZA.1 Scope and relevant characteristics . 30
ZA.2 Procedure for AVCP of aggregate concrete masonry units . 32
ZA.2.1 System(s) of AVCP . 32
ZA.2.2 Declaration of performance (DoP) . 33
ZA.3 CE marking and labelling. 38
Bibliography . 41
European foreword
This document (EN 771-3:2011+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 771-3:2011".
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 basic requirements for construction works of the EU
Construction Products Regulation (Regulation (EU) No 305/2011).
For relationship with EU Regulation/Directives, 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.
1 Scope
This European Standard specifies the characteristics and performance requirements of aggregate concrete
masonry units made from dense and lightweight aggregates or a combination of both for which the main
intended uses are common, facing or exposed masonry in load bearing or non-load bearing building and civil
engineering applications. The units are suitable for all forms of walling, including single leaf, external leaf to
chimneys, cavity wall, partitions, retaining, and basement. They can provide fire protection, thermal insulation,
sound insulation and sound absorption.
This European Standard includes aggregate concrete masonry units of an overall non-rectangular
parallelepiped shape, !specially" shaped and accessory units.
!It defines the performance related to e.g. strength, density, dimensional accuracy, and 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."
This European Standard does not specify standard sizes for aggregate concrete masonry units, nor standard
work dimensions and angles of specially shaped aggregate concrete masonry units. It does not cover storey
height panels, chimney flue linings nor units intended for use as a damp proof course. It does not cover units
with an incorporated thermal insulation material bonded to the faces of the unit susceptible to be exposed to
fire.
2 Normative references
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 772-1:2011, 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 772-6, Methods of test for masonry units ― Part 6: Determination of bending tensile strength of aggregate
concrete masonry units
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 772-14, Methods of test for masonry units ― Part 14: Determination of moisture movement of aggregate
concrete and manufactured stone masonry units
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)
3 Terms, definitions and symbols
3.1 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1.1
masonry unit
preformed component intended for use in masonry construction
3.1.2
common masonry unit
masonry unit normally intended for use with no faces left visible
3.1.3
facing masonry unit
masonry unit intended for use with one or more faces left visible and which may or may not be exposed to
external climatic conditions
3.1.4
exposed masonry unit
facing masonry unit exposed to external climatic conditions without render or other equivalent protection
3.1.5
aggregate concrete masonry unit
masonry unit manufactured from, cementitious binder, aggregates and water and which may contain
admixtures and additions and colouring pigments and other materials incorporated or applied during or
subsequent to unit manufacture
3.1.6
co-ordinating size
size of a co-ordinating space allocated to a masonry unit including allowances for joints
3.1.7
work size
size of a unit specified for its manufacture, to which the actual size conforms within permissible deviations
3.1.8
actual size
size of a unit as measured
3.1.9
regular shaped masonry unit
masonry unit with an overall rectangular parallelepiped shape
NOTE Examples of different shapes of concrete masonry units are shown in Annex C.
3.1.10
specially shaped masonry unit
masonry unit which is not a rectangular parallelepiped
3.1.11
accessory unit
unit which is shaped to provide a particular function, e.g. to complete the geometry of the masonry
3.1.12
interlocking features
shaped matched projections and indentations on masonry units
EXAMPLE Tongue and groove systems.
3.1.13
hole
formed void which may or may not pass completely through a masonry unit
3.1.14
frog
depression formed in one or both of the 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
3.1.15
recess
depression or indentation in one or more surfaces of a masonry unit
EXAMPLE Mortar pocket, rendering keyway, grooves to provide a discontinuity in the mortar joint, grip hole.
3.1.16
shell
peripheral solid material between the hole(s) and the face or the header of a unit
3.1.17
web
solid material between the formed voids in a masonry unit
3.1.18
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
3.1.19
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.
3.1.20
Category II masonry units
units not intended to comply with the level of confidence of Category I units
3.1.21
normalized compressive strength of masonry units
compressive strength of masonry units converted to the air dry compressive strength of an equivalent 100 mm
wide × 100 mm high masonry unit
NOTE See the procedure given in EN 772-1.
3.1.22
mean compressive strength of masonry units
arithmetic mean of the compressive strengths of masonry units
3.1.23
characteristic compressive strength of masonry units
compressive strength corresponding to a 5 % lower fractile of the compressive strength of masonry units
3.1.24
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
3.1.25
product group
products from one manufacturer having common values for one or more characteristic
3.1.26
consignment
shipment from the supplier
3.1.27
grip hole
hole in a masonry unit to enable it to be more readily grasped and lifted by hand or machine
3.2 Symbols
l
length, in mm
l length of the diagonal, in mm
d
w width, in mm
h height, in mm
f
normalized compressive strength, in N/mm
b
f
characteristic compressive strength, in N/mm
c
f
mean compressive strength, in N/mm
m
f
individual result compressive strength, in N/mm
bi
λ thermal conductivity of a masonry unit in a dry state at an average temperature of 10 °C
10,dry,unit
4 Materials
The specifications of the materials to be used shall be included in the production control documentation (see
8.3). If appropriate European Standards are available, they shall be used except that aggregates need not
comply with grading requirements. If not available, the manufacturer shall specify the materials and have data
on their suitability.
5 Requirements for aggregate concrete 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.
NOTE A declared value may be chosen from the classification system, if any, of the place of manufacture/use of the
units.
It should be noted that the standard test methods are not always applicable to specially shaped and accessory
units as defined in 3.1.10 and 3.1.11.
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 or 5 % fractile (p = 0,05) for characteristic values and a
confidence level of 95 %.
For production evaluation, the manufacturer shall define the conformity criteria in the factory production
control documentation (see 8.3).
5.2 Dimensions and tolerances
5.2.1 Dimensions
The manufacturer shall declare the dimensions of the aggregate concrete masonry units in mm for length,
width and height, in that order (see Figure 1). They shall be given in terms of work size.
NOTE 1 In addition the co-ordinating size may be given.
Key
1 Length 3 Height 5 Face
2 Width 4 Bed 6 Header
NOTE 2 This relates to the normal use of the masonry unit in the wall.
Figure 1 — Dimensions and surfaces
5.2.2 Dimensional tolerances
5.2.2.1 Tolerances
The tolerances on declared work sizes of individual regular shaped units shall conform to Table 1. Closer
tolerances may be declared for one or more dimensions. The manufacturer shall declare the tolerance
category of the units.
Table 1 — Limit deviations in millimetres
Tolerance category D1 D2 D3 D4
Length +3 +1 +1 +1
−5 −3 −3 −3
Width +3 +1 +1 +1
−5 −3 −3 −3
Height +3 ± 2 ± 1,5 ± 1,0
−5
Tolerances for non-regular shaped and accessory units shall be as given in Table 1 or as declared by the
manufacturer.
These tolerances shall not apply to the dimensions between the surfaces of units which are manufactured to
be non planar.
If sampled in accordance with A.2 and tested in accordance with EN 772-16:2011 (method a)), the results
evaluated in accordance with B.1 shall conform to the declared tolerance category.
5.2.2.2 Flatness of bed faces
When aggregate concrete masonry units are declared as tolerance category D4 for use with thin layer mortar,
the manufacturer shall also declare the maximum deviation from flatness of the bed faces.
If sampled in accordance with A.2 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 aggregate concrete masonry units are declared as tolerance category D4 for use with thin layer mortar,
the manufacturer shall also declare the maximum deviation from plane parallelism of the bed faces.
If sampled in accordance with A.2 and tested in accordance with EN 772-16:2011 (method d)), the deviation
from plane parallelism of the bed faces shall not exceed the declared value.
5.3 Configuration and appearance
5.3.1 Configuration
When relevant to the uses for which aggregate concrete 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 EN 1996-1-1 and/or it may include one or more items such as those in the following list, as relevant:
— shape and features, including the direction of any formed voids (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.
The requirements for shape and features will normally apply to regular shaped units, but need not apply to the
surfaces or arises of units with special shapes or to accessory units.
Units may be provided with recesses or interlocking features and with sharp, rounded or chamfered arises.
The total volume of frogs shall not exceed 20 % of the overall volume of the unit, i.e. length × width × height.
Each declared value shall be stated as either an upper limit or a lower limit or as a range of values. When
aggregate concrete masonry units are sampled from a consignment in accordance with A.2 and tested in
accordance with EN 772-16 and EN 772-2, if necessary, the mean value derived from measurements of the
test sample shall be within the range or limit declared.
5.3.2 Appearance
5.3.2.1 Flatness of surfaces of facing units
When the surface of facing units are declared by the manufacturer to be plaine, they shall not deviate from a
plane by more than (0,1 l ) mm or 2 mm whichever is the greater, where l is the length of the diagonal of
d d
the surface of the unit declared plaine, based on the actual size of the unit.
The requirements for flatness shall not apply to the surfaces of units which are manufactured to be non-
planar.
If sampled in accordance with A.2 and tested in accordance with EN 772-20, the results evaluated in
accordance with B.2 shall comply with the value given above.
5.3.2.2 Surface appearance of facing units
When required the surface of facing units may have compliance established on the basis of comparison with
any approved samples. Comparison shall be made from a distance of 3 m in normal daylight conditions. This
compliance shall be established before the units are used.
5.4 Density
5.4.1 Gross dry density of the units
The gross dry density of the units shall be declared in kg/m by the manufacturer.
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 of the concrete
When relevant to the uses for which the unit is put on the market, the manufacturer shall declare the net dry
density of the concrete units in kg/m .
In addition, the manufacturer may declare the minimum and maximum individual values of net dry density.
5.4.3 Tolerances
The mean values of the samples tested shall not deviate by more than ± 10 % from the declared values.
Closer deviations may be declared.
If sampled in accordance with A.2 and tested in accordance with EN 772-13, the results evaluated in
accordance with B.3 shall comply with the declared values.
5.5 Mechanical strength
5.5.1 Compressive strength
5.5.1.1 General
The strength of the masonry units in compression shall be declared in N/mm by the manufacturer (declared
value, see 3.1.18). The declared value shall be either the characteristic 5 % fractile f or the mean 50 %
c
fractile f compressive strength of the units.
m
In addition, the manufacturer shall declare:
— whether the aggregate concrete masonry unit is Category I or Category II (see ZA.2);
— the normalized compressive strength when relevant.
NOTE EN 772-1 gives instructions on how to convert the declared compressive strength into the normalized
compressive strength.
If sampled in accordance with A.2 and tested in accordance with EN 772-1, the results, evaluated in
accordance with B.4.1 for characteristic strength or B.4.2 for mean strength, shall be not less than the
declared value.
The declaration shall relate to and indicate the orientation(s) of the units as tested, the method(s) of bedding
the units and whether any voids present are intended to be fully filled with mortar. The manufacturer shall
declare the conditioning regime and the surface preparation used.
When the units are conditioned in accordance with 7.3.5, the results shall be brought to the air dry condition in
accordance with EN 772-1:2011, Annex A.
Whole units or parts of units may be tested in an orientation other than the orientation of normal use of the
units, provided there is adequate correlation between the direction of testing and of use.
5.5.1.2 Testing of specimens cut from units
Units which cannot be conveniently tested whole, may be sawn into test specimens having the same w to h
ratio as the original unit, provided that the specimen length as tested is not less than the value of h of the
specimen.
Sawn test specimens shall be representative of the original unit section.
The value of h of any sawn specimen shall be not less than 100 mm. If the value h of a sawn specimen is less
than one half the height of the original unit, then specimens shall be sampled from both the upper and lower
parts of the original unit. A sketch indicating the relationship between the cut specimen and the whole unit
shall be included in the test report.
5.5.2 Bending tensile strength
The mean bending tensile strength of units, having a w less than 100 mm and a ratio of l to w greater than 10,
may be declared by the manufacturer instead of compressive strength.
When a specified number of aggregate concrete masonry units is sampled from a consignment in accordance
with A.2 and tested in accordance with EN 772-6, the results evaluated in accordance with B.4 shall be not
less than the declared value.
5.6 Thermal properties
When relevant to the uses for which the units are put on the market and in all cases for masonry units
intended to be used in elements subject to thermal insulation requirements, the manufacturer shall provide the
mean λ -value and the determination model as prescribed in EN 1745 or alternatively give gross dry
10,dry,unit
density (5.4.1) or net dry density (5.4.2) and configuration (5.3.1).
Additionally another fractile may be provided. In such cases both the additional fractile and the corresponding
λ -value shall be given.
10,dry,unit
When the aggregate concrete masonry units are sampled in accordance with Annex A and tested in
accordance with EN 1745 following the model provided, then the obtained λ-value of the specified number of
aggregate concrete masonry units shall be not greater than the provided λ-value.
When relevant to the use for which the units are put on the market, the value of specific heat capacity given in
EN 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.
NOTE When the intended use of the product provides a complete protection against water penetration (e.g. a
suitable layer of render, cladding, inner leaf of a cavity wall, internal walls), no reference to freeze/thaw resistance is
required.
5.8 Water absorption by capillarity
When relevant to the uses for which units are put on to the market and in all cases for units intended to be
used in exposed external elements (see 3.1.4), the manufacturer shall declare in g/m s the maximum water
absorption coefficient due to capillary action of the exposed face of the unit.
If sampled in accordance with A.2 and tested in accordance with EN 772-11 for an immersion time of
(10 ± 0,2) min, the results evaluated in accordance with B.5 shall be no more than the declared value.
5.9 Moisture movement
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 structural requirements, the moisture movement (shrinkage and expansion) of units
shall be declared by the manufacturer.
If sampled in accordance with A.2 and tested in accordance with EN 772-14, the results evaluated in
accordance with Clause B.5 shall be no more than the declared value.
5.10 Water vapour permeability
When relevant to the uses for which the masonry unit is put on the market and in all cases for units intended
to be used in external elements, the manufacturer shall provide information on the water vapour permeability
through the water vapour diffusion coefficient tabulated values given in EN 1745 or determined in accordance
with EN ISO 12572.
5.11 Reaction to fire
For units intended to be used in elements subject to fire requirements the manufacturer shall declare the
reaction to fire classification of the masonry unit.
For masonry units containing a mass or volume fraction of ≤ 1,0 % (whichever is the most onerous) of
homogeneously distributed organic materials the declaration may be fire Class A1 without the need to test.
Masonry units containing a mass or volume fraction of > 1,0 % (whichever is the most onerous) of
homogeneously distributed organic materials shall be classified in accordance with EN 13501-1 and the
appropriate reaction to fire class declared.
Information on reaction to fire class of supplementary insulating material shall be given on the basis of
European Standards as declared by the supplier of the insulating material.
NOTE Attention is drawn to the Commission Decision 96/603/EC, as amended by Commission Decision
2000/605/EC, in which non-combustible masonry units containing not more than a mass or volume fraction of 1,0 %
(whichever is the more onerous) of homogeneously distributed organic materials are classified as reaction to fire Class A1
without testing.
5.12 Shear bond strength
5.12.1 General
For aggregate concrete masonry units intended to be used in elements subjected to structural requirements,
the shear bond strength of the unit in combination with mortar shall be declared in terms of the characteristic
initial shear strength in accordance with EN 1052-3. The declaration may be made either on the basis of fixed
values as in 5.12.2 or tests as in 5.12.3. The manufacturer shall declare whether the value of bond strength
has been obtained from the fixed values or from test.
NOTE In most cases it is expected that the use of fixed values will be sufficient.
5.12.2 Declaration based on fixed values
When no declaration is made in accordance with 5.12.3 the characteristic initial shear strength of the unit in
combination with mortar may be declared by reference to EN 998-2:2010, Annex C.
5.12.3 Declaration based on tests
The characteristic initial shear strength of the unit in combination with a specific type of mortar specified in
accordance with EN 998-2 may be declared based on tests on masonry units sampled from a consignment in
accordance with Annex A and tested in accordance with EN 1052-3. The characteristic initial shear strength
shall not be less than the declared value.
NOTE Bond strength depends on the mortar, the masonry unit and the workmanship.
5.13 Flexural bond strength
When relevant for the intended place of use and the intended application, the flexural bond strength of units
and mortar shall be declared. The declaration shall give the characteristic flexural strength of the masonry
either in the plane of failure perpendicular to the bed joints or the plane of failure parallel to the bed joints or
both, as relevant together with the mortar and unit specification for which the declaration is valid.
When aggregate concrete masonry units are sampled in accordance with Annex A and tested in accordance
with EN 1052-2, the characteristic flexural strength shall not be less than the value declared.
!
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 of 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/."
6 Description, designation and classification of aggregate concrete masonry units
6.1 Description and designation of units
The description and designation of an aggregate concrete masonry unit shall comprise at least the following:
a) number and date of issue of this European Standard;
b) type of unit (see Clause 3);
c) work size dimensions and tolerance category (see 5.2);
d) compressive or bending tensile strength (where appropriate, see 5.5);
e) configuration and appearance (see 5.3).
When relevant to the uses for which the units are put on the market, the description and designation may
include:
f) gross dry density (see 5.4.1);
g) net dry density declared for the concrete, (see 5.4.2);
h) coordinating size (see 5.2.1);
i) moisture movement (see 5.9);
j) thermal properties (see 5.6);
k) other properties.
!NOTE Refer to ZA.3 for CE marking."
6.2 Classification
Specification of the properties of the units may be given by reference to classification systems provided those
systems are based only on single properties included in this European Standard and do not themselves
constitute a barrier to trade.
This does not remove the requireme
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