SIST EN 771-3:2004
(Main)Specification for masonry units - Part 3: Aggregate concrete masonry units (Dense and light-weight aggregates)
Specification for masonry units - Part 3: Aggregate concrete masonry units (Dense and light-weight aggregates)
This EN specifies the characteristics and performance requirements for the physical and mechanical properties of aggregate concrete masonry units made from dense aggregate, lightweight aggregate or a combination of both. Units conforming to this Part of this EN are used exposed or non-exposed in common or facing masonry in building or civil engineering works.
Festlegungen für Mauersteine - Teil 3: Mauersteine aus Beton (mit dichten und porigen Zuschlägen)
Diese Europäische Norm beschreibt die Eigenschaften und Leistungsanforderungen für Mauersteine aus Beton mit dichten und/oder porigen Zuschlägen, die vorwiegend in tragendem oder nichttragendem Mauerwerk einschließlich üblichen Mauerwerks, Verblendmauerwerk oder Sichtmauerwerk in Bauwerken des Hoch- oder Tiefbaus verwendet werden. Die hierin beschriebenen Mauersteine eignen sich für alle Arten von Mauerwerk einschließlich einschaligen Mauerwerks, des Außenmauerwerks von Schornsteinen, zweischaligen Mauerwerks, Trennwänden, Stützmauern und Untergeschossen. Sie dienen dem Brand-, Wärme-, Schallschutz sowie der Schallabsorption.
Diese Europäische Norm gilt ebenfalls für Mauersteine aus Beton mit einer nicht allseitig von Rechtecken begrenzten Form einschließlich Form- und Ergänzungssteinen.
Diese Norm beschreibt die Anforderungen, z.B. an Festigkeit, Rohdichte, Maßgenauigkeit. Ferner werden die Konformitätsbewertung und die Kennzeichnung der von dieser Europäischen Norm erfassten Produkte festgelegt.
Diese Europäische Norm legt keine genormten Größen für Mauersteine aus Beton fest. Sie enthält auch keine Sollmaße oder Winkel für Formsteine aus Beton. Sie gilt nicht für geschosshohe Tafeln, Steine für die Auskleidung von Rauchabzügen oder für Steine zur Herstellung von feuchtesperrenden Schichten. Diese Europäische Norm gilt nicht für Steine mit einem Wärmedämmstoff, der auf die Seiten des Steins, die Feuer ausgesetzt sein können, aufgebracht ist.
Spécifications pour éléments de maçonnerie - Partie 3: Eléments de maçonnerie en béton de granulats (granulats courants et légers)
Cette Norme européenne spécifie les caractéristiques et les exigences de performances des blocs en béton de granulats fabriqués a partir de granulats courants et légers ou une combinaison des deux, utilisés, exposés ou non, en maçonnerie courante ou de parement, porteuse ou non, dans des bâtiments ou des ouvrages de génie civil. Les blocs conviennent pour toutes les formes de murs, y compris les murs a simple ou double paroi, les conduits extérieurs de fumée, les cloisons, les murs de soutenement et de soubassement. Ils peuvent constituer une protection contre les incendies, une isolation thermique et acoustique et constituer une absorption acoustique.
Cette Norme européenne concerne également les éléments de maçonnerie en béton n'ayant pas une forme générale de parallélépipede rectangle, notamment sur les éléments de forme particuliere et les accessoires.
Elle définit d'une part les performances relatives par exemple a la résistance, la masse volumique et les tolérances dimensionnelles et permet d'autre part d'évaluer la conformité du produit par rapport a cette Norme européenne. Elle inclut également les exigences de marquage des produits qui y sont traités.
Cette Norme européenne ne spécifie pas les formats standard des blocs en béton de granulats, les dimensions de fabrication courantes, ni les caractéristiques angulaires des blocs en béton de granulats de forme particuliere. Elle ne couvre pas les panneaux hauteur d'étage, les conduits intérieurs de fumée ni les blocs destinés a servir d'assise anti-humidité. Elle ne couvre pas les blocs comportant un isolant thermique rapporté sur les faces susceptibles d'etre exposées au feu.
Specifikacija za zidake – 3. del: Betonski zidaki (kompaktni in lahki agregati)
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN 771-3:2004
01-januar-2004
Specifikacija za zidake – 3. del: Betonski zidaki (kompaktni in lahki agregati)
Specification for masonry units - Part 3: Aggregate concrete masonry units (Dense and
light-weight aggregates)
Festlegungen für Mauersteine - Teil 3: Mauersteine aus Beton (mit dichten und porigen
Zuschlägen)
Spécifications pour éléments de maçonnerie - Partie 3: Eléments de maçonnerie en
béton de granulats (granulats courants et légers)
Ta slovenski standard je istoveten z: EN 771-3:2003
ICS:
91.100.30
SIST EN 771-3:2004 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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EUROPEAN STANDARD
EN 771-3
NORME EUROPÉENNE
EUROPÄISCHE NORM
July 2003
ICS 91.100.30
English version
Specification for masonry units - Part 3: Aggregate concrete
masonry units (Dense and light-weight aggregates)
Spécifications pour éléments de maçonnerie - Partie 3: Festlegungen für Mauersteine - Teil 3: Mauersteine aus
Blocs en béton de granulats (granulats courants et légers) Beton (mit dichten und porigen Zuschlägen)
This European Standard was approved by CEN on 9 April 2003.
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 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 Management Centre has the same status as the official
versions.
CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece,
Hungary, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Slovakia, Spain, Sweden, Switzerland and United
Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36 B-1050 Brussels
© 2003 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 771-3:2003 E
worldwide for CEN national Members.
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EN 771-3:2003 (E)
Contents
Foreword.3
1 Scope .4
2 Normative references .4
3 Definitions, terms and symbols .5
3.1 Terms and definitions .5
3.2 Symbols.7
4 Materials .7
4.1 General.7
5 Requirements for aggregate concrete masonry units.7
5.1 General.7
5.2 Dimensions and tolerances.7
5.3 Configuration .9
5.4 Density.10
5.5 Mechanical strength .10
5.6 Thermal properties .11
5.7 Durability .11
5.8 Water absorption by capillarity .11
5.9 Moisture movement.12
5.10 Water vapour permeability.12
5.11 Reaction to fire.12
5.12 Shear bond strength.12
5.13 Flexural bond strength.13
6 Description, designation and classification of concrete masonry units .13
6.1 Description and designation of units .13
6.2 Classification.13
7 Marking .14
8 Evaluation of conformity.14
8.1 General.14
8.2 Initial type tests.14
8.3 Factory production control.15
Annex A (normative) Sampling for initial type testing and for independent testing of
consignments.17
Annex B (normative) Compliance criteria for initial type testing and for independent testing
of consignments .20
Annex C (informative) Examples of different shapes of concrete masonry units.24
Annex ZA (informative) Clauses of this European Standard addressing the provisions of the
EU Construction Products Directive .25
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EN 771-3:2003 (E)
Foreword
This document (EN 771-3:2003) 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 January 2004, and conflicting national standards shall
be withdrawn at the latest by April 2005.
This document has been prepared under a mandate given to CEN by the European Commission and the
European Free Trade Association and supports the essential requirements of the EU Construction
Products Directive (89/106/EEC).
For relationship with EU Directives, see informative Annex ZA which is an integral part of this document.
It also takes into account the general rules for reinforced and unreinforced masonry in Eurocode 6.
The Annexes A and B of this European Standard are normative, Annex C is informative.
EN 771 Specification for masonry units consists of:
Part 1: Clay masonry units.
Part 2: Calcium silicate masonry units.
Part 3: Aggregates 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, Czech Republic,
Denmark, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Luxembourg, Malta,
Netherlands, Norway, Portugal, Slovakia, Spain, Sweden, Switzerland and the United Kingdom.
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EN 771-3:2003 (E)
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 concrete masonry units of an overall non rectangular parallelepiped
shape, especially shaped and accessory units.
It defines the performance related to e.g. strength, density, dimensional accuracy, and provides for the
evaluation of conformity of the product to this European Standard. The marking requirements for products
covered by this European Standard is also 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
This European Standard incorporates by dated or undated reference, provisions from other publications.
These normative references are cited at the appropriate places in the text and the publications are listed
hereafter. For dated references, subsequent amendments to or revisions of any of these publications
apply to this European Standard only when incorporated in it by amendment or revision. For undated
references the latest edition of the publication referred to applies (including amendments).
EN 772-1:2000, 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, manufactured stone and natural stone masonry units due to capillary action in 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: 2000, 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 998-2:2001, Specification for mortar for masonry — Part 2 : Masonry mortar
EN 1052-3, Methods of test for masonry — Part 3 : Determination of initial shear strength
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EN 771-3:2003 (E)
EN 1745, Masonry and masonry products — Methods for determining declared and design thermal
values
EN 13501-1, Fire classification of construction products and building elements —
Part 1: Classification using test 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 Definitions, terms and symbols
3.1 Terms and definitions
For the purposes of this European Standard 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.
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EN 771-3:2003 (E)
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, e.g. 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 (e.g. 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
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
3.1.18
Category I masonry units
units with a declared compressive strength with a probability of failure to reach it not exceeding 5 %. This
may be determined via the mean or characteristic value
3.1.19
Category II masonry units
units not intended to comply with the level of confidence of Category I units
3.1.20
normalized compressive 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 Annex A of EN 772-1:2000
3.1.21
mean compressive strength of masonry units
arithmetic mean of the compressive strengths of masonry units
3.1.22
characteristic compressive strength of masonry units
compressive strength corresponding to a 5 % lower fractile of the compressive strength of masonry units
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EN 771-3:2003 (E)
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/mm²;
b
f characteristic compressive strength in N/mm²;
c
f mean compressive strength in N/mm²;
m
f individual result compressive strength, in N/mm²;
bi
4 Materials
4.1 General
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 sub-clauses relates to initial type testing (see 8.2) and, when
relevant, to consignment testing (see Annex A). For the compressive strength of Category I units use a
50 % fractile (p = 0,50) for mean values or 5 % fractile (p = 0,05) for characteristic values and a
confidence level of 95 %.
For production evaluation the manufacturer shall define the conformity criteria in the factory production
control documentation (see 8.3).
5.2 Dimensions and tolerances
5.2.1 Dimensions The manufacturer shall declare the dimensions of the 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
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EN 771-3:2003 (E)
4
2
6
3
5
1
Key
1 Length 2 Width 3 Height
4 Bed 5 Face 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 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
D1 D2 D3
category
length + 3 + 1 + 1
– 5 – 3 – 3
width + 3 + 1 + 1
– 5 – 3 – 3
height + 3 ± 2 ± 1,5
– 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 clause A.2 and tested in accordance with EN 772-16: 2000 (method A) the
results evaluated in accordance with clause B.1 shall conform to the declared tolerance category.
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EN 771-3:2003 (E)
5.3 Configuration
5.3.1 General
The shape and features shall be declared by the manufacturer. The requirements for shape and features
given in 5.3.2 to 5.3.4 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.
NOTE The manufacturer may also declare, whether the units comply with the limits for one or another of the
groups specified in relevant parts of Eurocode 6.
If sampled in accordance with clause A.2 and tested in accordance with EN 772-16, and EN 772-2 if
necessary, the results evaluated in accordance with clause B.2 shall conform to the declared values.
5.3.2 Shell thickness
The minimum thickness of the shells of units shall be declared. If sampled in accordance with clause A.2
and tested in accordance with EN 772-16, the results evaluated in accordance with clause B.2 shall
conform to the declared values.
5.3.3 Holes
The percentage of holes, if any, in the units shall be declared. If sampled in accordance with clause A.2
the percentage volume of holes in units shall be determined by measurement in accordance with EN
772-16 and calculation, or in the case of holes which pass completely through a unit, the percentage of
holes may be determined in accordance with EN 772-2 and calculation, the results evaluated in
accordance with clause B.2 shall conform to the declared values.
5.3.4 Frog
The total volume of frogs shall not exceed 20 % of the overall volume of the unit, i.e. length × width ×
height.
5.3.5 Flatness of surfaces of facing units
When the surface of facing units are declared by the manufacturer to be plain, 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
d
d
diagonal of the surface of the unit declared plane, 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 clause A.2 and tested in accordance with EN 772-20, the results evaluated
in accordance with clause B.2 shall comply with the value given above.
5.3.6 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.
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EN 771-3:2003 (E)
5.4 Density
5.4.1 Gross dry density of the units
The gross dry density of the units shall be declared in kg/m³ by the manufacturer.
NOTE This declaration may be made for the evaluation of:
loading;
airborne sound insulation;
thermal insulation;
fire resistance.
5.4.2 Net dry density of the concrete
When relevant to the uses for which the unit is put on the market and in all cases for units to be used in
elements subject to acoustic requirements, the manufacturer shall declare the net dry density of the
concrete of units in kg/m³.
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 clause A.2 and tested in accordance with EN 772-13 the results evaluated
in accordance with clause 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/mm² by the manufacturer
(declared value – for definition, see 3.1.17). The declared value shall be either the characteristic (5 %
fractile) f or the mean (50 % fractile) f compressive strength of the units.
c m
In addition, the manufacturer shall declare:
whether the concrete masonry unit is Category I or Category II (see clause 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 clause 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.
Units shall be conditioned in accordance with 7.3.2 a) or 7.3.5 of EN 772-1:2000, but when conditioned in
accordance with 7.3.5 the values shall be brought to the air dry condition in accordance with Annex A of
EN 772-1:2000.
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EN 771-3:2003 (E)
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.
If surface preparation is required (see 7.2.1 of EN 772-1:2000), units less than 100 mm in work size h
shall be prepared in accordance with 7.2.4 of EN 772-1:2000 and units of 100 mm and over in
accordance with 7.2.4 or 7.2.5 of EN 772-1:2000.
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 concrete masonry units is sampled from a consignment in accordance with
clause A.2 and tested in accordance with EN 772-6 the results evaluated in accordance with clause B.4
shall be not less than the declared value.
5.6 Thermal properties
When relevant to the uses for which the unit is put on the market and in all cases for masonry units
intended to be used in elements subject to thermal requirements, the manufacturer shall provide
information on the thermal properties of the aggregate concrete masonry units. It shall be done by
reference to EN 1745 or alternatively to 5.3 and 5.4.
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/m²s the maximum
water absorption coefficient due to capillary action of the exposed face of the unit.
If sampled in accordance with clause 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 clause B.1 shall be no more than the declared
value.
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EN 771-3:2003 (E)
NOTE: As an interim measure users of the standard should divide the result obtained through
EN 772-11 by 24,49 (i.e. the square root of 600) in order to obtain the value in g/m²s .
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 clause A.2 and tested in accordance with EN 772-14, the results evaluated
in accordance with Figure B.2 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.
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 subjec
...
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