Grouts for ceramic tiles - Part 2: Test methods

This document specifies the methods for determining characteristics for grouts used in internal and external installation of ceramic tiles.
This document does not contain performance requirements or recommendations for the design and installation of ceramic tiles.
The following test methods are described:
-   Determination of flexural and compressive strength (9.1);
-   Determination of water absorption (9.2);
-   Determination of shrinkage (9.3);
-   Determination of resistance to abrasion (9.4);
-   Determination of chemical resistance (9.5).
Grouts for ceramic tiles can be used also for other kinds of tiles (natural and agglomerated stones, etc.), if they do not adversely affect the stones.
WARNING - This document can involve hazardous materials and operations. It is important that persons using this document are familiar with normal laboratory practice. This document does not purport to address all the safety problems, if any, associated with its use. It is the responsibility of the user to establish appropriate safety and health practices and to ensure compliance with any European and national regulatory conditions.

Fugenmörtel für keramische Fliesen und Platten - Teil 2: Prüfverfahren

In diesem Dokument werden die Verfahren zur Bestimmung der Merkmale von Mörtel festgelegt, der bei der Verlegung von keramischen Fliesen und Platten im Außenbereich verwendet wird.
Dieses Dokument enthält keine Leistungsanforderungen oder Empfehlungen hinsichtlich der Formgestaltung und Verlegung von keramischen Fliesen und Platten.
Folgende Prüfverfahren werden beschrieben:
-   Bestimmung der Biegefestigkeit und der Druckfestigkeit (9.1);
-   Bestimmung der Wasseraufnahme (9.2);
-   Bestimmung der Schwindung (9.3);
-   Bestimmung der Abriebbeständigkeit (9.4);
-   Bestimmung der Chemikalienbeständigkeit (9.5).
Fugenmörtel für keramische Fliesen und Platten können auch für andere Arten von Fliesen und Platten (aus Natur- und Betonwerkstein usw.) verwendet werden, sofern sie auf diese Steinmaterialien keine negativen Einflüsse ausüben.
WARNUNG - Dieses Dokument kann sich auf gefährliche Materialien und Handlungen beziehen. Es ist wichtig, dass Personen, die dieses Dokument anwenden, mit der üblichen Laborpraxis vertraut sind. Dieses Dokument beinhaltet keine vollständige Aufzählung von gegebenenfalls zutreffenden Sicherheitsproblemen, die mit seiner Anwendung verbunden sein könnten. Es liegt in der Verantwortung der anwendenden Stelle, Sicherheits- und Gesundheitsvorschriften einzuhalten und die Übereinstimmung mit europäischen oder nationalen Vorschriften sicherzustellen.

Mortiers de jointoiement pour carreaux et dalles céramiques - Partie 2 : Méthodes d'essai

Le présent document spécifie les méthodes permettant de déterminer les caractéristiques des mortiers utilisés pour la réalisation des joints entre carreaux et dalles céramiques en intérieur ou en extérieur.
Le présent document ne contient pas de spécifications ni de recommandations pour la conception et la pose des carreaux et dalles céramiques.
Les méthodes d’essai suivantes sont décrites :
-   détermination de la résistance à la flexion et à la compression (9.1) ;
-   détermination de l’absorption d’eau (9.2) ;
-   détermination du retrait (9.3) ;
-   détermination de la résistance à l’abrasion (9.4) ;
-   détermination de la résistance chimique (9.5).
Les mortiers de jointoiement pour carreaux et dalles céramiques peuvent également être utilisés pour d’autres types de carrelages (pierres naturelles et reconstituées, etc.) s’ils sont compatibles avec ces pierres.
AVERTISSEMENT - Le présent document peut impliquer l’utilisation de matériaux et la mise en oeuvre de modes opératoires dangereux. Il est important que les personnes utilisant le présent document connaissent bien les pratiques courantes de laboratoire. Le présent document n’a pas pour but de traiter tous les problèmes de sécurité qui sont, le cas échéant, liés à son utilisation. Il incombe à l’utilisateur de la présente norme d’établir des pratiques appropriées en matière d’hygiène et de sécurité, et de s’assurer de la conformité à la réglementation européenne et nationale en vigueur.

Fugirne mase za keramične ploščice - 2. del: Preskusne metode

Ta dokument določa metode za ugotavljanje lastnosti fugirnih mas, ki se uporabljajo pri polaganju keramičnih ploščic v prostoru in na prostem.
Ta dokument ne zajema zahtev glede učinkovitosti ali priporočil za načrtovanje in polaganje keramičnih ploščic.
Opisane so naslednje preskusne metode:
–   določevanje upogibne in tlačne trdnosti (9.1);
–   določevanje vpijanja vode (9.2);
–   določevanje krčenja (9.3);
–   določevanje odpornosti proti obrabi (9.4);
–   določevanje odpornosti proti kemikalijam (9.5).
Fugirne mase za keramične ploščice se lahko uporabljajo tudi za druge vrste ploščic (iz naravnega in aglomeriranega kamna itd.), če ne vplivajo škodljivo na kamen.
OPOZORILO: V dokumentu so lahko opisani nevarni materiali in postopki. Osebe, ki uporabljajo ta dokument, morajo biti seznanjene z običajno laboratorijsko prakso. Ta dokument ne obravnava vseh morebitnih varnostnih težav, ki se navezujejo na njegovo uporabo. Za vzpostavitev ustreznih varnostnih in zdravstvenih praks ter za zagotovitev skladnosti z veljavnimi evropskimi in nacionalnimi regulativnimi pogoji je odgovoren uporabnik.

General Information

Status
Published
Public Enquiry End Date
13-Sep-2021
Publication Date
28-Sep-2022
Technical Committee
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
22-Sep-2022
Due Date
27-Nov-2022
Completion Date
29-Sep-2022

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Standards Content (sample)

SLOVENSKI STANDARD
SIST EN 13888-2:2022
01-november-2022
Nadomešča:
SIST EN 12808-1:2009
SIST EN 12808-2:2009
SIST EN 12808-3:2009
SIST EN 12808-4:2009
SIST EN 12808-4:2009/AC:2011
SIST EN 12808-5:2009
Fugirne mase za keramične ploščice - 2. del: Preskusne metode
Grouts for ceramic tiles - Part 2: Test methods
Fugenmörtel für keramische Fliesen und Platten - Teil 2: Prüfverfahren

Mortiers de jointoiement pour carreaux et dalles céramiques - Partie 2 : Méthodes

d'essai
Ta slovenski standard je istoveten z: EN 13888-2:2022
ICS:
91.100.10 Cement. Mavec. Apno. Malta Cement. Gypsum. Lime.
Mortar
91.100.23 Keramične ploščice Ceramic tiles
SIST EN 13888-2:2022 en,fr,de

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------
SIST EN 13888-2:2022
---------------------- Page: 2 ----------------------
SIST EN 13888-2:2022
EN 13888-2
EUROPEAN STANDARD
NORME EUROPÉENNE
September 2022
EUROPÄISCHE NORM
ICS 91.100.10 Supersedes EN 12808-1:2008, EN 12808-2:2008, EN
12808-3:2008, EN 12808-4:2009, EN 12808-5:2008
English Version
Grouts for ceramic tiles - Part 2: Test methods

Mortiers de jointoiement pour carreaux et dalles Fugenmörtel für keramische Fliesen und Platten - Teil

céramiques - Partie 2 : Méthodes d'essai 2: Prüfverfahren
This European Standard was approved by CEN on 8 August 2022.

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, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,

Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and

United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels

© 2022 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 13888-2:2022 E

worldwide for CEN national Members.
---------------------- Page: 3 ----------------------
SIST EN 13888-2:2022
EN 13888-2:2022 (E)
Contents Page

European foreword ...................................................................................................................................................... 3

1 Scope .................................................................................................................................................................... 4

2 Normative references .................................................................................................................................... 4

3 Terms and definitions ................................................................................................................................... 4

4 Sampling ............................................................................................................................................................. 4

5 Test conditions ................................................................................................................................................ 5

6 Test materials .................................................................................................................................................. 5

7 Mixing of grouts ............................................................................................................................................... 5

8 Test report ......................................................................................................................................................... 6

9 Test methods .................................................................................................................................................... 6

9.1 Determination of flexural and compressive strength ....................................................................... 6

9.2 Determination of water absorption ....................................................................................................... 10

9.3 Determination of shrinkage ...................................................................................................................... 12

9.4 Determination of resistance to abrasion ............................................................................................. 16

9.5 Determination of chemical resistance .................................................................................................. 20

Bibliography ................................................................................................................................................................. 24

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SIST EN 13888-2:2022
EN 13888-2:2022 (E)
European foreword

This document (EN 13888-2:2022) has been prepared by Technical Committee CEN/TC 67 “Ceramic

tiles”, the secretariat of which is held by UNI.

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 March 2023, and conflicting national standards shall be

withdrawn at the latest by March 2023.

Attention is drawn to the possibility that some of the elements of this document may be the subject of

patent rights. CEN shall not be held responsible for identifying any or all such patent rights.

This document supersedes EN 12808-1:2008, EN 12808-2:2008, EN 12808-3:2008, EN 12808-4:2009

and EN 12808-5:2008.

This document belongs to series EN 13888, Grouts for ceramic tiles, which consists of the following parts:

— Part 1: Requirements, classification, designation, marking and labelling;
— Part 2: Test methods.

Any feedback and questions on this document should be directed to the users’ national standards body.

A complete listing of these bodies can be found on the CEN website.

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, France, Germany, Greece, Hungary, Iceland, Ireland,

Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of North

Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and the United

Kingdom.
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SIST EN 13888-2:2022
EN 13888-2:2022 (E)
1 Scope

This document specifies the methods for determining characteristics for grouts used in internal and

external installation of ceramic tiles.

This document does not contain performance requirements or recommendations for the design and

installation of ceramic tiles.
The following test methods are described:
— Determination of flexural and compressive strength (9.1);
— Determination of water absorption (9.2);
— Determination of shrinkage (9.3);
— Determination of resistance to abrasion (9.4);
— Determination of chemical resistance (9.5).

Grouts for ceramic tiles can also be used for other kinds of tiles (natural and agglomerated stones, etc.),

if they do not adversely affect the stones.

WARNING — This document can involve hazardous materials and operations. It is important that

persons using this document are familiar with normal laboratory practice. This document does not

purport to address all the safety problems, if any, associated with its use. It is the responsibility of the

user to establish appropriate safety and health practices and to ensure compliance with any European

and national regulatory conditions.
2 Normative references

The following documents are referred to in the text in such a way that some or all of their content

constitutes requirements 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 196-1:2016, Methods of testing cement - Part 1: Determination of strength
EN 1067, Adhesives - Examination and preparation of samples for testing

EN ISO 10545-6, Ceramic tiles - Part 6: Determination of resistance to deep abrasion for unglazed tiles

(ISO 10545-6)
EN ISO 15605, Adhesives - Sampling (ISO 15605)
3 Terms and definitions
No terms and definitions are listed in this document.

ISO and IEC maintain terminological databases for use in standardization at the following addresses:

— ISO Online browsing platform: available at https://www.iso.org/obp
— IEC Electropedia: available at https://www.electropedia.org/
4 Sampling

Take at least 2 kg sample of the grout in accordance with EN ISO 15605 and EN 1067.

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SIST EN 13888-2:2022
EN 13888-2:2022 (E)
5 Test conditions

Standard conditions shall be (23 ± 2) °C and (50 ± 5) % relative humidity and the speed of air in the

testing area less than 0,2 m/s.

The tolerance in the time of conditioning for all test specimens shall be as shown in Table 1 below:

Table 1 — Allowed tolerance in testing time for all specimens requiring conditioning

Allowed tolerance tor
Specimen conditioning time
testing
6 h ±15 min
7 d ±3 h
14 d ±6 h
21 d ±9 h
28 d ±12 h
Testing shall be performed within the specified time window.
6 Test materials
Condition all test materials for at least 24 h under standard conditions.
The grout to be tested shall be within its shelf life, where this is specified.
7 Mixing of grouts

The amount of water and/or liquid admix required for preparing the cementitious grout shall be as stated

by the manufacturer in parts by weight, i.e. liquid to dry powder.

Prepare at least 2 kg of the grout in a mixer of the type described in EN 196-1:2016, 4.4, using the slow

speed settings, (140 ± 5) r/min rotation and (62 ± 5) r/min planetary movement.
Carry out the following procedure:
— pour the liquid into the pan;
— scatter the dry powder over the liquid;
— mix for 30 s;
— take out the mixing paddle;
— scrape down the paddle and pan within 1 min;
— put the paddle back in place and mix for 1 min.

Let the grout mature if and as specified in the manufacturer's instructions, and then mix for a further 15 s.

In the case of reaction resin grouts, follow the manufacturer's instructions.
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SIST EN 13888-2:2022
EN 13888-2:2022 (E)
8 Test report
The test report shall provide the following information:
a) number, title and issue of this document;
b) place and date of sampling;
c) type of grout, commercial designation and manufacturer name;
d) identification of the test sample;
e) handling and storage of samples before testing;
f) test conditions;
g) date of testing;
h) amount of water or liquid used for preparing the grout;
i) result of the visual inspection of the specimen before testing;
j) any other factor that could have influenced the result;
k) test results (individual and mean values and mode of failure where required):
1) flexural and compressive strength;
2) water absorption;
3) shrinkage
4) resistance to abrasion;
5) chemical resistance.
9 Test methods
9.1 Determination of flexural and compressive strength
9.1.1 Apparatus

9.1.1.1 Three gang mould shall consist of three horizontal compartments so that three prismatic

specimens 40 mm x 40 mm x 160 mm can be prepared simultaneously (see EN 196-1:2016, 4.5).

9.1.1.2 Jolting apparatus or jolting table used for the compaction of 40 mm x 40 mm x 160 mm grout

specimen, which shall comply with EN 196-1:2016, 4.6.

9.1.1.3 Flexural strength testing machine shall be capable of applying the load with suitable capacity and

sensitivity for the test. The machine shall be provided with a flexure device in accordance with

EN 196-1:2016, 4.7 (see Figure 1).
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SIST EN 13888-2:2022
EN 13888-2:2022 (E)

9.1.1.4 Compressive strength testing machine shall comply with EN 196-1:2016, 4.8. The test requires

the use of a jig (in accordance with EN 196-1:2016, 4.9) to be incorporated in the lower platen; the upper

platen receives the load from the machine through an intermediate spherical seating (see Figure 2).

9.1.2 Preparation of test specimens

Mould the specimens immediately after the preparation of the grout, with the mould firmly clamped to

the jolting table.

Introduce, using a suitable scoop, the first of two layers of grout into each of the compartments, directly

from the mixing bowl. Spread the layer uniformly, then compact using 60 jolts.
Introduce the second layer of grout, level and compact with a further 60 jolts.

Lift the mould gently from the jolting table, strike off excess of material and smooth the surface with a flat

trowel. Wipe off the grout left on the perimeter of the mould.
Cover the mould with a glass plate according to EN 196-1.

Place the mould, suitably identified, on a horizontal base in standard conditions, (23 ± 2) °C and

(50 ± 5) % R.H.
After 24 h carefully remove the specimen from the mould.

Keep the demoulded prism in standard conditions for 27 d, leaving a clearance of at least 25 mm on all

sides.
Prepare three specimens for each grout.
9.1.3 Flexural strength under standard conditions

After conditioning has been completed, place the prism in the testing machine (9.1.1.3) with one side face

on the supporting rollers and with the longitudinal axis normal to the support.

Apply the load vertically in accordance with the procedure described in EN 196-1:2016, 9.1.

Keep the prism halves in standard conditions until tested in compression.
9.1.4 Compressive strength under standard conditions

Test the prism halves broken in flexion, by means of the equipment specified in 9.1.1.4 and following the

procedure described in EN 196-1:2016, 9.2.
9.1.5 Flexural and compressive strength after freeze-thaw cycles
Prepare the test units in accordance with 9.1.2.

Condition the test units for 6 d in standard conditions and then immerse in water for 21 d before carrying

out 25 freeze-thaw cycles, in accordance with the following procedure.
For each freeze-thaw cycle:

— remove the test units from the water and lower the temperature to (−15 ± 3) °C within 2 h ± 20 min;

— maintain the test units at (−15 ± 3) °C for 2 h ± 20 min;

— immerse the test units in water at (20 ± 3) °C and raise the temperature of water to (15 ± 3) °C for at

least 2 h ± 20 min.
Repeat the cycle 25 times.
---------------------- Page: 9 ----------------------
SIST EN 13888-2:2022
EN 13888-2:2022 (E)

Condition the test units for 3 d in standard conditions after the last cycle and prior to test examine them

and record a brief description of surface appearance of the specimen. Determine the flexural strength in

accordance with 9.1.3 and the compressive strength in accordance with 9.1.4.
9.1.6 Evaluation of results
9.1.6.1 Flexural strength
The flexural strength (R ) is calculated from:
1,5 FL
R = N / mm (1)
where
b is the length of the side of the square section of the prism, in millimetres;
F is the load applied to the middle of the prism at fracture, in newtons;
L is the distance between the supports, in millimetres.
Calculate the mean of the three determinations to the nearest 0,1 N /mm .
9.1.6.2 Compressive strength
The compressive strength (R ) is calculated from:
c 2
R = N / mm (2)
1 600
where
F is the maximum load at fracture, in newtons;

1 600 = 40 mm x 40 mm is the area of the platens or auxiliary plates, in square millimetres.

Calculate the mean of the six results obtained from the test to the nearest 0,1 N / mm .

9.1.7 Test report

The information listed in Clause 8, items a) to j) shall be provided plus item k) 1: flexural and compressive

strength.
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SIST EN 13888-2:2022
EN 13888-2:2022 (E)
Dimensions in millimetres
Figure 1 — Arrangement of loading for determination of flexural strength
---------------------- Page: 11 ----------------------
SIST EN 13888-2:2022
EN 13888-2:2022 (E)
Key
1 ball bearings
2 sliding assembly
3 return spring
4 spherical seating of machine
5 upper platen of machine
6 spherical seating of the jig
7 upper platen of the jig
8 specimen
9 lower plate
10 lower platen of the jig
11 lower platen of the machine
Figure 2 — Typical jig for compressive strength testing
9.2 Determination of water absorption
9.2.1 Apparatus

9.2.1.1 Three gang mould with ground surfaces, made of steel, used for the preparation of 40 mm x

40 mm x 160 mm prisms, in accordance with EN 196-1:2016, 4.5.

9.2.1.2 Jolting apparatus or jolting table used for the compaction of 40 mm x 40 mm x 160 mm grout

specimen, in accordance with EN 196-1:2016, 4.6.
9.2.1.3 Tray with a flat base, large enough to contain three test specimens.
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SIST EN 13888-2:2022
EN 13888-2:2022 (E)
9.2.2 Preparation of test specimens

Insert a 1 mm thick, rigid, plastic (e.g. PTFE) or metal divider into each compartment of the mould,

approximately in the middle, parallel to the ends.

Mould the specimens immediately after the preparation of the grout, with the mould firmly clamped to

the jolting table.

Introduce, using a suitable scoop, the first of two layers of grout into each of the compartments, directly

from the mixing bowl. Spread the layer uniformly, then compact using 60 jolts.
Introduce the second layer of grout, level and compact with a further 60 jolts.

Lift the mould gently from the jolting table, strike off excess of material and smooth the surface with a flat

trowel. Wipe off the grout left on the perimeter of the mould. Cover the mould with a glass plate according

to EN 196-1.

Place the mould, suitably identified, on a horizontal base in standard conditions, (23 ± 2) °C and

(50 ± 5) % R.H.
After 24 h, carefully remove the specimen from the mould.

Keep the demoulded prisms for 27 d in standard conditions, leaving a clearance of at least 25 mm on all

sides.
Prepare six specimens for each grout.
9.2.3 Test procedure

After 21 d from specimen preparation, seal the side faces by means of a neutral curing silicone sealant so

as to be water impermeable.

After 28 d from specimen preparation, weigh, with 0,1 g precision, each test sample and then place them

in the tray with the upper surface down, immersed in water 5 mm to 10 mm deep, taking care to prevent

the prism faces from coming in contact with each other.
Maintain the water level constantly by adding water when necessary.

After 30 min, remove the test samples from water, quickly dry them by blotting with a dampened cloth

and immediately weigh. Replace in the tray and r
...

SLOVENSKI STANDARD
oSIST prEN 13888-2:2021
01-september-2021
Fugirne mase za keramične ploščice - 2. del: Preskusne metode
Grouts for ceramic tiles - Part 2: Test methods
Mörtel für Keramische Fliesen und Platten - Teil 2: Prüfverfahren

Mortiers de jointoiement pour carreaux et dalles céramiques - Partie 2 : Méthodes

d'essai
Ta slovenski standard je istoveten z: prEN 13888-2
ICS:
91.100.10 Cement. Mavec. Apno. Malta Cement. Gypsum. Lime.
Mortar
oSIST prEN 13888-2:2021 en,fr,de

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------
oSIST prEN 13888-2:2021
---------------------- Page: 2 ----------------------
oSIST prEN 13888-2:2021
DRAFT
EUROPEAN STANDARD
prEN 13888-2
NORME EUROPÉENNE
EUROPÄISCHE NORM
July 2021
ICS 91.100.10 Will supersede EN 12808-1:2008, EN 12808-2:2008,
EN 12808-3:2008, EN 12808-4:2009, EN 12808-
5:2008
English Version
Grouts for ceramic tiles - Part 2: Test methods

Mortiers de jointoiement pour carreaux et dalles Mörtel für Keramische Fliesen und Platten - Teil 2:

céramiques - Partie 2 : Méthodes d'essai Prüfverfahren

This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee

CEN/TC 67.

If this draft becomes a European Standard, 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.

This draft European Standard was established by CEN 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, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,

Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and

United Kingdom.

Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are

aware and to provide supporting documentation.

Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without

notice and shall not be referred to as a European Standard.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels

© 2021 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 13888-2:2021 E

worldwide for CEN national Members.
---------------------- Page: 3 ----------------------
oSIST prEN 13888-2:2021
prEN 13888-2:2021 (E)
Contents Page

European foreword ...................................................................................................................................................... 3

1 Scope .................................................................................................................................................................... 4

2 Normative references .................................................................................................................................... 4

3 Terms and definitions ................................................................................................................................... 4

4 Sampling ............................................................................................................................................................. 4

5 Test conditions ................................................................................................................................................ 5

6 Test materials .................................................................................................................................................. 5

7 Mixing of grouts ............................................................................................................................................... 5

8 Test report ......................................................................................................................................................... 6

9 Test methods .................................................................................................................................................... 6

9.1 Determination of flexural and compressive strength ....................................................................... 6

9.1.1 Apparatus .......................................................................................................................................................... 6

9.1.2 Preparation of test specimens ................................................................................................................... 7

9.1.3 Flexural strength under standard conditions ...................................................................................... 7

9.1.4 Compressive strength under standard conditions ............................................................................. 7

9.1.5 Flexural and compressive strength after freeze-thaw cycles ......................................................... 7

9.1.6 Evaluation of results ...................................................................................................................................... 8

9.1.7 Test report ......................................................................................................................................................... 8

9.2 Determination of water absorption ....................................................................................................... 10

9.2.1 Apparatus ........................................................................................................................................................ 10

9.2.2 Preparation of test specimens ................................................................................................................. 11

9.2.3 Test procedure ............................................................................................................................................... 11

9.2.4 Evaluation and expression of results .................................................................................................... 11

9.2.5 Test report ....................................................................................................................................................... 12

9.3 Determination of shrinkage ...................................................................................................................... 12

9.3.1 Apparatus ........................................................................................................................................................ 12

9.3.2 Preparation of test specimens ................................................................................................................. 12

9.3.3 Test procedure ............................................................................................................................................... 13

9.3.4 Evaluation of results .................................................................................................................................... 13

9.3.5 Test report ....................................................................................................................................................... 13

9.4 Determination of resistance to abrasion ............................................................................................. 16

9.4.1 Apparatus ........................................................................................................................................................ 16

9.4.2 Preparation of test specimens ................................................................................................................. 16

9.4.3 Test procedure ............................................................................................................................................... 17

9.4.4 Expression of results ................................................................................................................................... 17

9.4.5 Test report ....................................................................................................................................................... 17

9.5 Determination of chemical resistance .................................................................................................. 20

9.5.1 Apparatus ........................................................................................................................................................ 20

9.5.2 Test specimen ................................................................................................................................................ 20

9.5.3 Test procedure ............................................................................................................................................... 21

9.5.4 Evaluation and expression of results .................................................................................................... 22

9.5.5 Test report ....................................................................................................................................................... 23

Bibliography ................................................................................................................................................................. 24

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oSIST prEN 13888-2:2021
prEN 13888-2:2021 (E)
European foreword

This document (prEN 13888-2:2021) has been prepared by Technical Committee CEN/TC 67 “Ceramic

tiles”, the secretariat of which is held by UNI.
This document is currently submitted to the CEN Enquiry.
This document will supersede EN 12808-1:2008, EN 12808-2:2008, EN 12808-3:2008,
EN 12808-4:2009 and EN 12808-5:2008.

This document belongs to series prEN 13888, Grouts for ceramic tiles, which consists of the following

parts:
— Part 1: Requirements, classification, designation, marking and labelling;
— Part 2: Test methods.
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oSIST prEN 13888-2:2021
prEN 13888-2:2021 (E)
1 Scope

This document specifies the methods for determining characteristics for grouts used in internal and

external installation of ceramic tiles.

This document does not contain performance requirements or recommendations for the design and

installation of ceramic tiles.
The following test methods are described:
— Determination of flexural and compressive strength (9.1);
— Determination of water absorption (9.2);
— Determination of shrinkage (9.3);
— Determination of resistance to abrasion (9.4);
— Determination of chemical resistance (9.5).

Grouts for ceramic tiles can be used also for other kinds of tiles (natural and agglomerated stones, etc.),

if they do not adversely affect the stones.

WARNING — This document can involve hazardous materials and operations. It is important that

persons using this document are familiar with normal laboratory practice. This document does not

purport to address all the safety problems, if any, associated with its use. It is the responsibility of the

user to establish appropriate safety and health practices and to ensure compliance with any European

and national regulatory conditions.
2 Normative references

The following documents are referred to in the text in such a way that some or all of their content

constitutes requirements 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 196-1:2016, Methods of testing cement - Part 1: Determination of strength
EN 1067, Adhesives - Examination and preparation of samples for testing

EN ISO 10545-6, Ceramic tiles - Part 6: Determination of resistance to deep abrasion for unglazed tiles

(ISO 10545-6)
EN ISO 15605, Adhesives - Sampling (ISO 15605)
3 Terms and definitions
No terms and definitions are listed in this document.

ISO and IEC maintain terminological databases for use in standardization at the following addresses:

• ISO Online browsing platform: available at https://www.iso.org/obp
• IEC Electropedia: available at https://www.electropedia.org/
4 Sampling

Take at least 2 kg sample of the grout in accordance with EN ISO 15605 and EN 1067.

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oSIST prEN 13888-2:2021
prEN 13888-2:2021 (E)
5 Test conditions

Standard conditions shall be (23 ± 2) °C and (50 ± 5) % relative humidity and the speed of air in the

testing area less than 0,2 m/s.

The tolerance in the time of conditioning for all test specimens shall be as shown in Table 1 below:

Table 1 — Allowed tolerance in testing time for all samples requiring conditioning

Sample conditioning time Allowed tolerance tor testing
6 h ±15 min
7 d ±3 h
14 d ±6 h
21 d ±9 h
28 d ±12 h
Testing shall be performed within the specified time window.
6 Test materials
Condition all test materials for at least 24 h under standard conditions.
The grout to be tested shall be within its shelf life, where this is specified.
7 Mixing of grouts

The amount of water and/or liquid admix required for preparing the cementitious grout shall be as

stated by the manufacturer in parts by weight, i.e. liquid to dry powder.

Prepare at least 2 kg of the grout in a mixer of the type described in EN 196-1:2016, 4.4, using the slow

speed settings, (140 ± 5) r/min rotation and (62 ± 5) r/min planetary movement.
Carry out the following procedure:
— pour the liquid into the pan;
— scatter the dry powder over the liquid;
— mix for 30 s;
— take out the mixing paddle;
— scrape down the paddle and pan within 1 min;
— replace the paddle and mix for 1 min.

Let the grout mature if and as specified in the manufacturer's instructions, and then mix for a further

15 s.
In the case of reaction resin grouts follow the manufacturer's instructions.
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oSIST prEN 13888-2:2021
prEN 13888-2:2021 (E)
8 Test report
The test report shall provide the following information:
a) number, title and issue of this document;
b) place and date of sampling;
c) type of grout, commercial designation and manufacturer name;
d) identification of the test sample;
e) handling and storage of samples before testing;
f) test conditions;
g) date of testing;
h) amount of water or liquid used for preparing the grout;
i) result of the visual inspection of the specimen before testing;
j) any other factor that could have influenced the result;
k) test results (individual and mean values and mode of failure where required):
1. flexural and compressive strength;
2. water absorption;
3. shrinkage
4. resistance to abrasion;
5. chemical resistance.
9 Test methods
9.1 Determination of flexural and compressive strength
9.1.1 Apparatus

9.1.1.1 Three gang mould shall consist of three horizontal compartments so that three prismatic

specimens 40 mm x 40 mm x 160 mm can be prepared simultaneously (see EN 196-1:2016, 4.5).

9.1.1.2 Jolting apparatus or jolting table used for the compaction of 40 mm x 40 mm x 160 mm grout

specimen; shall comply with EN 196-1:2016, 4.6.

9.1.1.3 Flexural strength testing machine shall be capable of applying the load with suitable capacity

and sensitivity for the test. The machine shall be provided with a flexure device in accordance with

EN 196-1:2016, 4.7 (see Figure 1).
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oSIST prEN 13888-2:2021
prEN 13888-2:2021 (E)

9.1.1.4 Compressive strength testing machine shall comply with EN 196-1:2016, 4.8. The test requires

the use of a jig (in accordance with EN 196-1:2016, 4.9) to be incorporated in the lower platen; the

upper platen receives the load from the machine through an intermediate spherical seating (see

Figure 2).
9.1.2 Preparation of test specimens

Mould the specimens immediately after the preparation of the grout, with the mould firmly clamped to

the jolting table.

Introduce, using a suitable scoop, the first of two layers of grout into each of the compartments, directly

from the mixing bowl. Spread the layer uniformly, then compact using 60 jolts.
Introduce the second layer of grout, level and compact with a further 60 jolts.

Lift the mould gently from the jolting table, strike off excess of material and smooth the surface with a

flat trowel. Wipe off the grout left on the perimeter of the mould.
Cover the mould with a plate glass sheet according to EN 196-1.

Place the mould, suitably identified, on a horizontal base in standard conditions, (23 ± 2) °C and

(50 ± 5) % R.H.
After 24 h carefully remove the specimen from the mould.

Keep the demoulded prism in standard conditions for 27 d, leaving a clearance of at least 25 mm on all

sides.
Prepare three specimen for each grout.
9.1.3 Flexural strength under standard conditions

After conditioning has been completed place the prism in the testing machine (9.1.1.3) with one side

face on the supporting rollers and with the longitudinal axis normal to the support.

Apply the load vertically in accordance with the procedure described in EN 196-1:2016, 9.1.

Keep the prism halves in standard conditions until tested in compression.
9.1.4 Compressive strength under standard conditions

Test the prism halves broken in flexion, by means of the equipment specified in 9.1.1.4 and following

the procedure described in EN 196-1:2016, 9.2.
9.1.5 Flexural and compressive strength after freeze-thaw cycles
Prepare the test units in accordance with 9.1.2.

Condition the test units for 6 d in standard conditions and then immerse in water for 21 d before

carrying out 25 freeze-thaw cycles, in accordance with the following procedure.
For each freeze-thaw cycle:

— remove the test units from the water and lower the temperature to (−15 ± 3) °C within 2 h ± 20 min;

— maintain the test units at (−15 ± 3) °C for 2 h ± 20 min;

— immerse the test units in water at (20 ± 3) °C and raise the temperature of water to (15 ± 3) °C for

at least 2 h ± 20 min.
Repeat the cycle 25 times.
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oSIST prEN 13888-2:2021
prEN 13888-2:2021 (E)

Condition the test units for 3 d in standard conditions after the last cycle and prior to test examine them

and record a brief description of surface appearance of the specimen. Determine the flexural strength in

accordance with 9.1.3 and the compressive strength in accordance with 9.1.4.
9.1.6 Evaluation of results
9.1.6.1 Flexural strength
The flexural strength (R ) is calculated from:
1,5 FL
R = N / mm (1)
where
b is the length of the side of the square section of the prism, in millimetres
F is the load applied to the middle of the prism at fracture, in newton
L the distance between the supports, in millimetres
Calculate the mean of the three determinations to the nearest 0,1 N /mm .
9.1.6.2 Compressive strength
The compressive strength (R ) is calculated from:
c 2
(2)
R = N / mm
1 600
where
F is the maximum load at fracture, in newton

1 600 = 40 mm x 40 mm is the area of the platens or auxiliary plates, in square millimetres

Calculate the mean of the six results obtained from the test to the nearest 0,1 N / mm .

9.1.7 Test report

The information listed in Clause 8, items a) to j) shall be provided plus item k) 1: flexural and

compressive strength.
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oSIST prEN 13888-2:2021
prEN 13888-2:2021 (E)
Dimensions in millimetres
Figure 1 — Arrangement of loading for determination of flexural
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oSIST prEN 13888-2:2021
prEN 13888-2:2021 (E)
Key
1 Ball bearings
2 Sliding assembly
3 Return spring
4 Spherical seating of machine
5 Upper platen of machine
6 Spherical seating of the jig
7 Upper platen of the jig
8 Specimen
9 Lower plate
10 Lower platen of the jig
11 Lower platen of the machine
Figure 2 — Typical jig for compressive strength testing
9.2 Determination of water absorption
9.2.1 Apparatus

9.2.1.1 Three gang mould with ground surfaces, made of steel, used for the preparation of 40 mm x

40 mm x 160 mm prisms, in accordance with EN 196-1:2016, 4.5.

9.2.1.2 Jolting apparatus or jolting table used for the compaction of 40 mm x 40 mm x 160 mm grout

specimen, in accordance with EN 196-1:2016, 4.6.
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oSIST prEN 13888-2:2021
prEN 13888-2:2021 (E)
9.2.1.3 Tray with a flat base, large enough to contain three test specimens.
9.2.2 Preparation of test specimens
Insert a 1 mm thick, rigid, plastic (e.g. PTFE) or metal divider into e
...

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