SIST EN 998-2:2017
(Main)Specification for mortar for masonry - Part 2: Masonry mortar
Specification for mortar for masonry - Part 2: Masonry mortar
This European Standard specifies requirements for factory-made masonry mortars (bedding, jointing and pointing) for use in masonry walls, columns and partitions (e.g. facing and rendered masonry, load bearing or non-load bearing masonry structures for buildings and civil engineering works).
This European Standard defines for fresh mortar the performance related to workable life, chloride content, air content, density and correction time (for thin-layer mortar only). For hardened mortar it defines, e.g. performances related to compressive strength, bond strength, density measured according to the corresponding test methods contained in separate European Standards.
This European Standard 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 covers masonry mortars defined in Clause 3 with the exception of site made mortar. However, this European Standard or part of this European Standard may be used in conjunction with codes of application and national specifications covering site made mortar.
Festlegungen für Mörtel im Mauerwerksbau - Teil 2: Mauermörtel
Diese Europäische Norm legt die Anforderungen für Werkmauermörtel (für Untermauerungen, Fugenglattstrich und Verfugen) zur Verwendung in Wänden, Pfeilern und Trennwänden aus Mauerwerk (z. B. Verblendmauerwerk und verputztes Mauerwerk, tragende und nicht tragende Mauerwerkskonstruktionen für Hoch- und Tiefbauten) fest.
Für Frischmörtel beschreibt diese Europäische Norm die Leistungsanforderungen in Bezug auf Verarbeitbarkeitszeit, Chloridgehalt, Luftgehalt, Rohdichte und Korrigierbarkeitszeit (nur für Dünnbettmörtel). Für Festmörtel werden die Leistungsanforderungen z. B. in Bezug auf Druckfestigkeit, Verbundfestigkeit und Rohdichte definiert. Alle Eigenschaften werden nach den entsprechend festgelegten Prüfverfahren, die in gesonderten Europäischen Normen enthalten sind, ermittelt.
Diese Europäische Norm stellt ein Verfahren zur Bewertung und Überprüfung der Leistungsbeständigkeit (AVPC) der Produkte mit dieser Europäischen Norm zur Verfügung. Anforderungen an die Kennzeichnung der von dieser Europäischen Norm abgedeckten Produkte sind enthalten.
Diese Europäische Norm gilt für Mauermörtel nach Abschnitt 3 mit der Ausnahme von Baustellenmörtel. Diese Europäische Norm oder Teile davon dürfen jedoch im Zusammenhang mit Anwendungsvorschriften und nationalen Festlegungen auch für Baustellenmörtel angewendet werden.
Définitions et spécifications des mortiers pour maçonnerie - Partie 2: Mortiers de montage des éléments de maçonnerie
Specifikacija za malte za zidanje - 2. del: Malta za zidanje
Ta evropski standard določa zahteve za tovarniško izdelane malte za zidanje (podlage, spoji in fugiranje) za uporabo na zidovih, stebrih in pregradah (npr. zidava fasad in oblaganje, nosilne ali nenosilne zidarske konstrukcije za visoke in nizke gradnje).
Ta evropski standard opredeljuje zmogljivost sveže malte v zvezi z obdelavnim časom, vsebnostjo kloridov, vsebnostjo zraka, gostoto in časom popravka (samo za tankoslojno malto). Za strjeno malto opredeljuje npr. zmogljivost v zvezi s tlačno trdnostjo, sprijemno trdnostjo, gostoto, izmerjeno v skladu z ustreznimi preskusnimi metodami, navedenimi v ločenih evropskih standardih.
Ta evropski standard 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 zajema malte za zidanje, opredeljene v točki 3, z izjemo malt, pripravljenih na gradbišču. Vendar se lahko ta evropski standard ali njegov del uporablja v povezavi s pravilniki za uporabo in nacionalnimi specifikacijami, ki zajemajo malte, pripravljene na gradbišču.
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN 998-2:2017
01-januar-2017
1DGRPHãþD
SIST EN 998-2:2010
Specifikacija za malte za zidanje - 2. del: Malta za zidanje
Specification for mortar for masonry - Part 2: Masonry mortar
Festlegungen für Mörtel im Mauerwerksbau - Teil 2: Mauermörtel
Définitions et spécifications des mortiers pour maçonnerie - Partie 2: Mortiers de
montage des éléments de maçonnerie
Ta slovenski standard je istoveten z: EN 998-2:2016
ICS:
91.100.10 Cement. Mavec. Apno. Malta Cement. Gypsum. Lime.
Mortar
SIST EN 998-2:2017 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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SIST EN 998-2:2017
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SIST EN 998-2:2017
EN 998-2
EUROPEAN STANDARD
NORME EUROPÉENNE
November 2016
EUROPÄISCHE NORM
ICS 91.100.10 Supersedes EN 998-2:2010
English Version
Specification for mortar for masonry - Part 2: Masonry
mortar
Définitions et spécifications des mortiers pour Festlegungen für Mörtel im Mauerwerksbau - Teil 2:
maçonnerie - Partie 2: Mortiers de montage des Mauermörtel
éléments de maçonnerie
This European Standard was approved by CEN on 9 April 2016.
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
© 2016 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 998-2:2016 E
worldwide for CEN national Members.
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EN 998-2:2016 (E)
Contents Page
European foreword . 4
Introduction . 6
1 Scope . 7
2 Normative references . 7
3 Terms and definitions . 8
4 Materials . 10
5 Product characteristics . 10
5.1 General . 10
5.2 Characteristics of fresh mortar . 11
5.2.1 Workable life . 11
5.2.2 Chloride content . 11
5.2.3 Air content . 11
5.3 Proportion of constituents. 11
5.4 Characteristics of hardened mortar . 11
5.4.1 Compressive strength . 11
5.4.2 Bond strength . 12
5.4.3 Water absorption . 13
5.4.4 Water vapour permeability . 13
5.4.5 Density (dry hardened mortar) . 13
5.4.6 Thermal conductivity . 13
5.4.7 Durability . 13
5.4.8 Reaction to fire . 13
5.4.9 Dangerous substances . 13
5.5 Additional requirements for thin layer mortars . 14
5.5.1 General . 14
5.5.2 Aggregates . 14
5.5.3 Correction time . 14
5.6 Mixing of mortar on site . 14
6 Designation of masonry mortar . 14
7 Marking and labelling . 15
8 Assessment and verification of constancy of performance (AVCP) . 15
8.1 General . 15
8.2 Product-type determination . 15
8.2.1 General . 15
8.2.2 Sampling . 16
8.2.3 Reference test . 16
8.2.4 Repeating of product-type determination . 16
8.2.5 Recording . 16
8.2.6 Application of test methods . 16
8.3 Factory Production Control, FPC . 16
8.3.1 General . 16
8.3.2 Process control. 16
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8.3.3 Finished product conformity . 17
8.3.4 Statistical techniques . 17
8.3.5 Traceability – marking and stock control of products . 17
8.3.6 Non-conforming products . 18
Annex A (normative) Sampling for product-type determination and independent testing of
consignments . 19
A.1 General . 19
A.2 Sampling procedure . 19
Annex B (informative) Use of masonry units and masonry mortar . 20
Annex C (normative) Characteristic initial shear strength of designed masonry mortars. 22
Annex D (informative) Indicative test frequencies for Factory Production Control (FPC) . 23
Annex ZA (informative) Relationship of this European Standard with Regulation (EU)
No.305/2011 . 25
ZA.1 Scope and relevant characteristics . 25
ZA.2 System of Assessment and Verification of Constancy of Performance (AVCP) . 26
ZA.3 Assignment of AVCP tasks . 26
Bibliography . 28
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EN 998-2:2016 (E)
European foreword
This document (EN 998-2:2016) has been prepared by Technical Committee CEN/TC 125 “Masonry”,
the secretariat of which is held by BSI.
This document supersedes EN 998-2:2010.
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 May 2017, and conflicting national standards shall be
withdrawn at the latest by August 2018.
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).
It also takes into account the general rules for reinforced and unreinforced masonry in Eurocode 6.
For relationship with EU Regulation, see informative Annex ZA, which is an integral part of this
document.
The most significant changes compared to the previous edition include:
a) implementation of new regulatory (CPR) terminology where relevant;
b) new subclause 5.4.2.2 on Flexural bond strength (deriving from Finnish legal query);
c) revised clauses on Assessment and verification of constancy of performance (AVCP);
d) new explanatory note added to tabulated values in Annex C;
e) new annex with indicative frequencies on testing for factory production control (informative);
f) revised Annex ZA (informative);
g) some minor editorial changes.
No changes to existing technical classes and/or threshold levels have been made.
EN 998, Specification for mortar for masonry consists of:
— Part 1: Rendering and plastering mortar;
— Part 2: Masonry mortar.
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.
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According to the CEN/CENELEC Internal Regulations, the national standards organisations 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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EN 998-2:2016 (E)
Introduction
The characteristics required of a mortar are related to its use.
They are considered in two groups, namely those relating to the fresh, unhardened mortar and those to
the hardened mortar.
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EN 998-2:2016 (E)
1 Scope
This European Standard specifies requirements for factory-made masonry mortars (bedding, jointing
and pointing) for use in masonry walls, columns and partitions (e.g. facing and rendered masonry, load
bearing or non-load bearing masonry structures for buildings and civil engineering works).
This European Standard defines for fresh mortar the performance related to workable life, chloride
content, air content, density and correction time (for thin-layer mortar only). For hardened mortar it
defines, e.g. performance related to compressive strength, bond strength, density measured according
to the corresponding test methods contained in separate European Standards.
This European Standard 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 covers masonry mortars defined in Clause 3 with the exception of site made
mortar. However, this European Standard or part of this European Standard may be used in conjunction
with codes of application and national specifications covering site made mortar.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are
indispensable for its application. For dated references, only the edition cited applies. For undated
references, the latest edition of the referenced document (including any amendments) applies.
EN 771 (all parts), Specification for masonry units
EN 1015-1, Methods of test for mortar for masonry - Part 1: Determination of particle size distribution (by
sieve analysis)
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 masonary - Part 11: Determination of flexural and compressive
strength of hardened mortar
EN 1015-17, Methods of test for mortar for masonry - Part 17: Determination of water-soluble chloride
content of fresh mortars
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 1052-3, Methods of test for masonry - Part 3: Determination of initial shear strength
EN 1052-5, Methods of test for masonry - Part 5: Determination of bond strength by the bond wrench
method
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EN 998-2:2016 (E)
EN 1745:2012, Masonry and masonry products - Methods for determining thermal properties
EN 13501-1, Fire classification of construction products and building elements — Part 1: Classification
using test data from reaction to fire tests
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
masonry mortar
mix of one or more inorganic binders, aggregates, water, and sometimes additions and/or admixtures
for bedding, jointing and pointing of masonry
3.2
fresh masonry mortar
mortar completely mixed and ready for use
3.3
Type of masonry mortar, defined according to concept
3.3.1
designed masonry mortar
mortar whose composition and manufacturing method is chosen by the producer in order to achieve
specified properties (performance concept)
3.3.2
prescribed masonry mortar
mortar made in predetermined proportions, the properties of which are assumed from the stated
proportion of the constituents (recipe concept)
3.4
Type of masonry mortar, defined according to properties and/or use
3.4.1
general purpose masonry mortar (G)
masonry mortar without special characteristics
3.4.2
thin layer masonry mortar (T)
designed masonry mortar with a maximum aggregate size less than or equal to a prescribed figure
(see 5.5.2)
3.4.3
lightweight masonry mortar (L)
designed masonry mortar with a dry hardened density below a prescribed figure (see 5.4.5)
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3.5
Type of masonry mortar, defined according to the mode of manufacture
3.5.1
factory-made masonry mortar
mortar batched and mixed in a factory
Note 1 to entry: It can be "dry mortar" which is ready-mixed, only requiring the addition of water or "wet
mortar" which is supplied ready for use.
3.5.2
semi-finished factory made masonry mortar
mortar described in either 3.5.2.1 or 3.5.2.2
3.5.2.1
pre-batched masonry 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
3.5.2.2
premixed lime-sand- masonry mortar
mortar whose constituents are wholly batched and mixed in a factory, supplied to the building site
where further constituents specified or provided by the factory are added (e.g. cement)
3.5.3
site-made masonry mortar
mortar composed of individual constituents batched and mixed on the building site
3.6
binder
material used to hold solid particles together in a coherent mass, e.g. cement, building lime
3.7
aggregate
granular material that does not contribute to the hardening reaction of the mortar
3.8
admixture
material added in small quantities to produce specified modifications to the properties
3.9
addition
finely divided inorganic material (which is not an aggregate or binder) that can be added to mortar in
order to improve or achieve special properties
3.10
bond strength
adhesion between the masonry mortar and the masonry unit
Note 1 to entry: The bond strength can either be determined as shear bond strength or as flexural bond
strength.
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3.11
declared value
value that a manufacturer is confident in achieving, taking into account the precision of test method, the
variability of the production process(es) and the product performance
Note 1 to entry: Characteristic strength values may be determined in accordance with the relevant test
methods.
3.12
masonry subjected to severe exposure
masonry or elements of masonry which are subjected to saturation with water (driving rain, ground
water) combined with frequent freeze/thaw-cycling due to climatic conditions, and absence of
protective features
3.13
masonry subjected to moderate exposure
masonry or elements of masonry which are exposed to moisture and freeze/thaw-cycling, excluding
constructions subjected to severe exposure
3.14
masonry subjected to passive exposure
masonry or elements of masonry which are not intended to be exposed to moisture and freezing
conditions
3.15
product-type
set of representative performance levels or classes of a construction product, in relation to its essential
characteristics, produced using a given combination of raw materials or other elements in a specific
production process
Note 1 to entry: The definition is taken from Regulation (EU) No. 305/2011.
4 Materials
Raw materials shall have characteristics permitting the finished product to conform to the
requirements of this European Standard. The manufacturer shall keep records of how suitability of
materials is established.
5 Product characteristics
5.1 General
The requirements on characteristics for fresh and hardened mortar specified in this European Standard
shall be defined in terms of the test methods and other procedures referred to in this European
Standard. The conformity criteria given in the following subclauses relate to product-type
determination (see 8.2) and consignments testing (in accordance with Annex A). For production
evaluation, the manufacturer shall define the conformity criteria in the factory production control
documentation (see 8.3).
NOTE The characteristics of mortar are specified under laboratory conditions and cannot always be directly
compared with the characteristics obtained under site conditions.
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5.2 Characteristics of fresh mortar
5.2.1 Workable life
The workable life shall be declared by the manufacturer. When the masonry mortar is sampled in
accordance with EN 1015-2 and tested in accordance with EN 1015-9, the workable life shall not be less
than the declared value.
5.2.2 Chloride content
When relevant, the chloride content of the mortar as delivered shall be declared by the manufacturer.
When sampled in accordance with EN 1015-2 and either tested in accordance with EN 1015-17 using
the procedure for determining water soluble chloride content or using a calculation based on measured
chloride ion content of the constituents of the mortar, the chloride content shall not be higher than the
declared value.
The chloride content should not exceed 0,1 % Cl of the mortar by dry mass.
5.2.3 Air content
When relevant for the use for which the masonry mortar is placed on the market the range in which the
air content will fall shall be declared by the manufacturer. When sampled in accordance with EN 1015-2
and tested in accordance with EN 1015-7 the air content shall fall within the declared range.
For masonry mortar where porous aggregates are used the air content may alternatively be determined
by testing the fresh mortar density according to EN 1015-6.
5.3 Proportion of constituents
For prescribed mortars, the mix proportions by volume or by weight of all the constituents shall be
declared by the manufacturer. In addition, the compressive strength shall be declared using publicly
available references establishing relationship between same mix proportions of the same constituents
and compressive strength.
5.4 Characteristics of hardened mortar
5.4.1 Compressive strength
For designed mortars, the compressive strength of masonry mortar shall be declared by the
manufacturer. The manufacturer may declare, alternatively or as supplement, the compressive strength
class in accordance with Table 1, where the compressive strength is designated by an 'M' followed by
the compressive strength class in N/mm², which it exceeds.
Table 1 — Mortar classes
Class M 1 M 2,5 M 5 M 10 M 15 M 20 M d
Compressive strength
1 2,5 5 10 15 20 d
2
N/mm
2
d is a compressive strength greater than 20 N/mm as a multiple of 5 declared by the manufacturer.
When the masonry mortar is sampled in accordance with EN 1015-2 and tested in accordance with
EN 1015-11, the compressive strength shall not be less than the declared compressive strength or the
declared compressive strength class. The declaration shall be followed by information on the test
sample preparation used (with or without absorbent filter paper).
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5.4.2 Bond strength
5.4.2.1 Shear bond strength
For designed masonry, mortars intended to be used in elements subjected to structural requirements
the shear bond strength of the mortar in combination with a masonry unit shall be declared in terms of
the characteristic initial shear strength. The declaration may be made either on the basis of tests as
a) below or tabulated values as b) below. The manufacturer shall declare the basis for his declaration.
a) Declaration based on tests
The characteristic initial shear strength of the mortar in combination with a specific type of unit in
accordance with EN 771 may be based on tests on mortar sampled in accordance with EN 1015-2 and
tested with the relevant unit in accordance with EN 1052-3. The characteristic initial shear strength
shall not be less than the declared value.
b) Declaration based on tabulated values
When no declaration is made under a) the characteristic initial shear strength of the mortar in
combination with a range of unit types shall be declared by reference to Annex C.
NOTE Shear bond strength depends on the mortar, the masonry unit, its moisture content and the
workmanship.
5.4.2.2 Flexural bond strength
For designed masonry mortars intended to be used in elements subjected to structural requirements
and when relevant for the intended place of use, the flexural bond strength of the mortar in
combination with a masonry unit shall be declared either in terms of the characteristic flexural bond
strength, as a) below, or in terms of the characteristic flexural strength of the masonry, as b) below. The
manufacturer shall declare the basis for his declaration.
a) Declaration based on flexural bond strength tests
The characteristic flexural bond strength of the mortar in combination with a specific type of unit in
accordance with EN 771 may be based on tests on mortar sampled in accordance with EN 1015-2 and
tested with the relevant unit in accordance with EN 1052-5. The characteristic flexural bond strength
shall not be less than the declared value.
b) Declaration based on direct flexural strength (masonry) tests
The characteristic flexural strength of the mortar in combination with a specific type of unit in
accordance with EN 771 may be based on tests on mortar sampled in accordance with EN 1015-2 and
tested with the relevant unit in accordance with EN 1052-2 either in the plane of failure parallel or
perpendicular to the bed joints, or both. The characteristic flexural strength shall not be less than the
declared value.
NOTE 1 Flexural bond strength depends on the mortar, the masonry unit, its moisture content and the
workmanship.
NOTE 2 In accordance with EN 1996-1-1, the declared flexural bond strength can be used in publicly available
references to obtain the characteristic flexural strength of masonry from the same combinations of mortars and
units.
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5.4.3 Water absorption
For masonry mortar intended to be used in external elements and exposed directly to the weather, the
water absorption shall be declared by the manufacturer. When sampled in accordance with EN 1015-2
and tested in accordance with EN 1015-18, the water absorption shall not be higher than the declared
value.
5.4.4 Water vapour permeability
For masonry mortar intended to be used in external elements, the water vapour permeability shall be
declared by the manufacturer by reference to EN 1745:2012, Table A.12 giving tabulated values for
water vapour diffusion coefficient for mortar.
5.4.5 Density (dry hardened mortar)
When relevant for the use for
...
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