oSIST prEN 196-13:2026

SLOVENSKI STANDARD
01-oktober-2026
Metode preskušanja cementa - 13. del: Učinkovita vsebnost alkalij
Methods of testing cement - Part 13: Effective alkali content
Prüfverfahren für Zement – Teil 13: Effektiver Alkaligehalt
Méthodes d'essais des ciments - Partie 13 : Teneur en alcalins effectifs
Ta slovenski standard je istoveten z: prEN 196-13
ICS:
91.100.10 Cement. Mavec. Apno. Malta Cement. Gypsum. Lime.
Mortar
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

DRAFT
EUROPEAN STANDARD
NORME EUROPÉENNE
EUROPÄISCHE NORM
August 2026
ICS 91.100.10
English Version
Methods of testing cement - Part 13: Effective alkali
content
Méthodes d'essais des ciments - Partie 13 : Teneur en Prüfverfahren für Zement - Teil 13: Effektiver
alcalins effectifs Alkaligehalt
This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee
CEN/TC 51.
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, Türkiye 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
© 2026 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 196-13:2026 E
worldwide for CEN national Members.

Contents Page
European foreword . 4
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 5
4 Reagents . 6
4.1 Distilled water . 6
4.2 Dilute hydrochloric acid (1+9): mix 9 volumes of water with 1 volume of concentrated
hydrochloric acid. . 6
4.3 Hydrochloric acid 0,05 mol/l, p.a . 6
4.4 sodium stock solution 1 000 mg/l: Dissolve (2,542 ± 0,001) g of sodium chloride in water
in a 1000 ml volumetric flask an make up to the mark. Commercially available solution can
also be used. . 6
4.5 potassium stock solution 1 000 mg/l: Dissolve (1,907 ± 0,001) g of potassium chloride in
water in a 1 000 ml volumetric flask an make up to the mark. Commercially available
solution can also be used. . 6
4.6 Buffer solution: Dissolve 50 g of caesium chloride and 250 g of aluminium nitrate
(Al(NO ) .9H O) in water and make up to 100 ml. . 6
3 3 2
4.7 Methyl orange indicator (dimethylaminoazobenzene p-sodium sulfonate): Dissolve
(0,020 ± 0,002) g of methyl orange in water and make up to 1 000 ml. . 6
4.8 Sodium carbonate (Na CO ) dried to constant mass at (250 ± 10) °C . 6
2 3
5 Apparatus . 6
5.1 Balance, analytical balance, capable of weighing to an accuracy of ± 0,01 g. 6
5.2 Climatic cabinet or chamber, capable of maintaining a temperature of (20,0 ± 2,0) °C . 6
5.3 Suction bottle, 250 ml . 6
5.4 Microlitre pipette, 1 ml to 5 ml or syringe with needle . 6
5.5 Filter with a filter pore size of 0,45 µm. Filter made of hydrophile Polytetrafluoroethylene
(PTFE) . 6
5.6 Volumetric pipette, 100 ml . 6
5.7 Volumetric burette, 50 ml . 6
5.8 Titration device (e.g. titrator) . 6
5.9 Argon or N gas . 6
5.10 Wide-neck bottle, made of Polyethylen (PE), Polypropylen (PP), Polyvinylchlorid (PVC) or
equivalent with screw cap (250 ml or 300 ml) . 6
5.11 Glass rod . 6
6 Effective alkalis from SWE test (surplus water extraction method) . 6
6.1 Principle . 6
6.2 Preparation of surplus water by extraction method (SWE) . 7
6.3 Determination of effective alkali content . 7
6.3.1 Method A: Determining the concentration of sodium and potassium . 7
6.3.2 Calculation . 8
6.3.3 Method B: determining the hydroxyl ion concentration (alternative) . 9
6.4 Test report . 10
6.5 Precision . 10
6.5.1 Repeatability . 10
6.5.2 Reproducibility . 10
Bibliography . 11
EN 196-13:2026 (E)
European foreword
This document (prEN 196-13:2026) has been prepared by Technical Committee CEN/TC 51 “Cement and
building limes”, the secretariat of which is held by NBN.
This document is currently submitted to the CEN Enquiry.
1 Scope
This document specifies the apparatus and procedure for determining the effective alkali content of
cements and other hydraulic binders. The method determines the effective alkali content after 28 days of
hydration by extracting pore water from cement stone and determining the concentration of sodium and
potassium (method A) or hydroxyl ions in the solution (method B).
2 Normative references
The following documents are referred to in the text in such a way that some or all 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 196-2, Methods of testing cement — Part 2: Che
...