EN 998-1:2003

SLOVENSKI STANDARD
SIST EN 998-1:2004
01-januar-2004
1DGRPHãþD
PSIST prEN 998-1:1996
Specifikacija malt za zidanje – 1. del: Zunanji in notranji omet
Specification for mortar for masonry - Part 1: Rendering and plastering mortar
Festlegungen für Mörtel im Mauerwerksbau - Teil 1: Putzmörtel
Définitions et spécifications des mortiers pour maçonnerie - Partie 1 : Mortiers d'enduits
minéraux extérieurs et intérieurs
Ta slovenski standard je istoveten z: EN 998-1:2003
ICS:
91.100.10 Cement. Mavec. Apno. Malta Cement. Gypsum. Lime.
Mortar
SIST EN 998-1:2004 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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EUROPEAN STANDARD
EN 998-1
NORME EUROPÉENNE
EUROPÄISCHE NORM
April 2003
ICS 91.100.10
English version
Specification for mortar for masonry - Part 1: Rendering and
plastering mortar
Spécifications des mortiers pour maçonnerie - Partie 1: Festlegungen für Mörtel im Mauerwerksbau - Teil 1:
Mortiers d'enduits intérieurs et extérieurs Putzmörtel
This European Standard was approved by CEN on 2 October 2002.
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 998-1:2003 E
worldwide for CEN national Members.

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EN 998-1:2003 (E)
Contents
page
Foreword . 3
Introduction . 4
1 Scope. 5
2 Normative references. 5
3 Terms, definitions and abbreviations . 6
4 Materials. 8
5 Requirements . 8
5.1 General . 8
5.2 Properties of hardened mortars . 9
5.3 Properties of fresh mortars. 13
5.4 Mixing of mortar on site . 13
6 Designation of rendering and plastering mortars . 13
7 Marking and labelling. 13
8 Evaluation of conformity . 14
8.1 General . 14
8.2 Initial type tests . 14
8.3 Factory Production Control .14
Annex A (normative) Sampling for initial type testing and independent testing of
consignments. 16
Annex ZA (informative) Clauses of this European Standard addressing the provisions of
EU Construction Products Directive. 17
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EN 998-1:2003 (E)
Foreword
This document (EN 998-1:2003) has been prepared by Technical Committee CEN/TC 125 "Masonry",
the Secretariat of which is held by BSI, following initial preparation by Working Group 2.
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 October 2003, and conflicting national standards
shall be withdrawn at the latest by January 2005.
This European Standard 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
standard.
In this European Standard Annex A is normative.
EN 998 Specification for mortar for masonry consists of:
Part 1: Rendering and plastering mortar.
Part 2: Masonry mortar.
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 998-1:2003 (E)
Introduction
The properties of rendering and plastering mortars depend essentially on the type or types of binders
used and their respective proportions. Special properties can be achieved by the type of aggregates,
admixtures and/or additions used.
Rendering/plastering mortars are defined
according to the concept as either:
designed mortars; or
prescribed mortars.
according to the mode of manufacture as either:
factory-made mortars;
semi-finished factory mortars; or
site-made mortars.
according to the properties and/or use, as either:
general purpose rendering/plastering mortar;
lightweight rendering/plastering mortar;
coloured rendering mortar;
one-coat rendering mortar;
renovation rendering/plastering mortar;
thermal rendering/plastering insulating mortar.
Rendering/plastering mortars do not attain their final characteristics until properly hardened after
application. The functions performed by a rendering/plastering mortar depend on the properties of the
type of materials used, on the thickness of the coats and the type of application. In addition,
rendering/plastering mortars determine the surface of the construction.
Regional differences in construction practices and climate, and different constituents for
rendering/plastering mortars do not allow for the establishment of standard mix proportions for
prescribed mortar that would be applicable in all of Europe. Therefore the specification of such mix
proportions (recipes) and fields of application should be based on practice and experience available in
the place of use.
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EN 998-1:2003 (E)
1 Scope
This European Standard is applicable to factory made rendering/plastering mortar based on inorganic
binders for external (rendering) and internal (plastering) use on walls, ceilings, columns and partitions.
It contains definitions and final performance requirements.
It does not cover mortars where calcium sulphate binder is the principle active binding agent.
Calcium sulphate binder can be used as an additional binder together with air lime. If air lime is the
principle active binding component, the rendering/plastering mortar is covered by this standard. If the
calcium sulphate binder is the principle active binding component, the mortar is covered by EN 13279.
The classification is carried out by the producer of the mortar.
Special fire resistant- and acoustical mortars, mortars for structural repair and surface treatments of
building elements such as materials for smoothing or trueing, paints, coatings, thin-layer organic
renders/plasters and prefabricated units (e.g. plaster boards) are not dealt with in this standard.
This standard covers rendering/plastering mortars defined in clause 3 with the exception of site made
rendering/plastering mortars. However, this standard or part of this standard may be used in
conjunction with codes of application and national specifications covering site made mortars.
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 1015-2, Methods of test for mortar for masonry — Part 2: Bulk sampling of mortars and
preparation of test mortars.
EN 1015-7, Methods of test for mortar for masonry — Part 7: Determination of air content of fresh
mortar.
EN 1015-9, Methods of test for mortar for masonry — Part 9: Determination of workable life and
correction time of fresh mortar.
EN 1015-10, Methods of test for mortar for masonry — Part 10: Determination of dry bulk density of
hardened mortar.
EN 1015-11, Methods of test for mortar for masonry — Part 11: Determination of flexural and
compressive strength of hardened mortar.
EN 1015-12, Methods of test for mortar for masonry – Part 12: Determination of adhesive strength of
hardened rendering and plastering mortar on substrates.
EN 1015-18, Methods of test for mortar for masonry — Part 18: Determination of water absorption
coefficient due to capillary action of hardened mortar.
EN 1015-19, Methods of test for mortar for masonry — Part 19: Determination of water vapour
permeability of hardened rendering and plastering mortar.
EN 1015-21, Methods of test for mortar for masonry — Part 21: Determination of the compatibility of
one-coat rendering mortars with substrates.
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EN 998-1:2003 (E)
EN 1745:2002, Masonry and masonry products — Methods for determining 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.
3 Terms, definitions and abbreviated terms
For the purposes of this European Standard the following terms, definitions and abbreviated terms
apply.
3.1
rendering/plastering mortar
mix of one or more inorganic binders, aggregates, water and sometimes admixtures and/or additions,
used as external renders or internal plasters
3.2
fresh rendering/plastering mortar
mortar completely mixed and ready for use
3.3 Types of rendering/plastering mortar defined according to concept
3.3.1
designed rendering/plastering mortar
mortar whose composition and manufacturing method is chosen by the producer in order to achieve
specified properties (performance concept)
3.3.2
prescribed rendering/plastering mortar
mortar made in pre-determined proportions, the properties of which are assumed from the stated
proportion of the constituents (recipe concept)
3.4 Types of rendering/plastering mortar according to the mode of manufacture
3.4.1
factory-made rendering/plastering mortar
mortar batched and mixed in a factory. It may be 'dry mortar' which is ready mixed only requiring the
addition of water, or ' wet mortar' which is supplied ready for use
3.4.2 semi-finished rendering/plastering factory mortar:
3.4.2.1
prebatched rendering/plastering mortar
mortar whose constituents are wholly batched in a factory, supplied to the building site and mixed
there according to the manufacturer's specification and conditions
3.4.2.2
premixed lime-sand rendering/plastering mortar
mortar whose constituents are wholly batched and mixed in a plant, supplied to the building site
where further constituents specified or provided by the factory are added (e.g. cement)
3.4.3
site-made rendering/plastering mortar
mortar composed of individual constituents batched and mixed on the building site
3.5 Types of rendering/plastering mortar according to properties and/or use
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EN 998-1:2003 (E)
3.5.1
general purpose rendering/plastering mortar
rendering/plastering mortar without special characteristics. It can be prescribed or designed
3.5.2
lightweight rendering/plastering mortar
designed rendering/plastering mortar with a dry hardened density below a prescribed figure
(see Table 2, L1)
3.5.3
coloured rendering mortar
designed rendering/plastering mortar specially coloured
NOTE The colour is achieved e.g. with pigments or coloured aggregates.
3.5.4
one coat rendering mortar for external use
designed rendering mortar applied in one coat which fulfils all the functions of a multicoat system
used externally and which is usually specifically coloured. One coat mortars for external use may be
manufactured using normal and/or lightweight aggregates
3.5.5
renovation mortar
designed rendering/plastering mortar used on moist masonry walls containing water soluble salts.
These mortars have a high porosity and vapour permeability and reduced capillary action
3.5.6
thermal insulating mortar
designed mortar with specific insulating properties
3.6 Further definitions
3.6.1
declared value
value that a manufacturer is confident in achieving, bearing in mind the precision of test and variability
of process
3.6.2
render/plaster
materials used externally are referred to as render/rendering and materials used internally as
plaster/plastering
3.6.3
rendering/plastering system
sequence of coats to be applied to a background which can be used in conjunction with the possible
use of a support and/or reinforcement and/or a pre-treatment
NOTE In some cases the pre-treatment may be regarded as a separate coat in addition to the specified
system.
3.6.4
render/plaster coat
layer applied in one or more operations or passes with the same mix, with the previous pass not being
allowed to set before the next one is made (i.e. fresh on fresh)
3.6.5
undercoat
lower coat or coats of a system
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EN 998-1:2003 (E)
3.6.6
final coat
last coat, decorative or not, of a multicoat rendering or plastering system
3.7 Abbreviated terms
GP: General purpose rendering/plastering mortar
LW: Lightweight rendering/plastering mortar
CR: Coloured rendering mortar
OC: One coat rendering mortar for external use
R: Renovation mortar
T: Thermal insulating mortar
FP: Fracture pattern
4 Materials
Raw materials shall have characteristics permitting the finished product to conform with the
requirements of this standard. The manufacturer shall keep records of how suitability of materials is
established.
5 Requirements
5.1 General
The requirements and properties for hardened and fresh mortar specified in this standard shall be
defined in terms of the test methods and procedures referred to in this standard. For these tests, the
mortar shall be sampled in accordance with EN 1015-2.
The conformity criteria given in Table 2 for hardened mortar and 5.3 for fresh mortar relate to initial
type tests (see 8.2) and consignment testing (see Annex A). For production evaluation purposes the
conformity criteria shall be defined in the factory production control documentation (see 8.3).
NOTE The mortar properties obtained under laboratory conditions cannot always be directly comparable
with the mortar properties obtained under site conditions.
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EN 998-1:2003 (E)
5.2 Properties of hardened mortars
5.2.1 General
Different fields of use and exposure conditions require mortars with different properties and
performance levels. For this purpose, compressive strength, water absorption and thermal
conductivity shall be classified according to Table 1. The properties relevant to the intended use
and/or type of product shall be declared according to Table 2. The declared values and/or classes
shall meet the requirements specified in Table 2 .
When relevant for the use for which the rendering/plastering mortar is placed on the market,
additional properties to those specified in Table 2 may be declared for each type of mortar where a
dash indicates 'no requirement’.
The declaration for reaction to fire and durability of mortars shall be made in accordance with the
following provisions:
5.2.2 Reaction to fire
Rendering/plastering mortars containing a mass or volume fraction of 1,0 % (whichever is the most
onerous) of homogeneously distributed organic materials are classified as reaction to fire Class A1
without the need to test.
Rendering/plastering mortars 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, in which non-combustible
mortar 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 A 1 without testing.
5.2.3 Durability
5.2.3.1 One-coat rendering mortar
The durability against freeze/thaw of one-coat rendering mortar shall be assessed by testing adhesion
and water permeability after weathering cycles (see Table 2, L4 and L7).
5.2.3.2 All rendering mortars except one-coat
Until a European method of test is available, the freeze-thaw resistance shall be evaluated and
declared to the provisions valid in the intended place of use of the mortar.
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EN 998-1:2003 (E)
Table 1 — Classification for hardened mortar properties
Properties Categories Values
2
CS I 0,4 to 2,5 N/mm
2
CS II 1,5 to 5,0 N/mm
Range of compressive strength at 28
days
2
CS III 3,5 to 7,5 N/mm
2
CS IV 6 N/mm
W 0 not specified
0,5
W 1
Capillary water absorption c 0,40 kg/m²·min
2 0,5
W 2
c 0,20 kg/m .min
T 1 0,1 W/m·K
Thermal conductivity
T 2 0,2 W/m·K
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