FprEN 18136

SLOVENSKI STANDARD
oSIST prEN 18136:2025
01-marec-2025
Mleti apnenec za beton - Definicija, specifikacije in merila skladnosti
Ground limestone for concrete - Definition, specifications and conformity criteria
Gemahlener Kalkstein für Beton - Definition, Anforderungen und Konformitätskriterien
Additions calcaires pour béton - Définition, spécifications et critères de conformité
Ta slovenski standard je istoveten z: prEN 18136
ICS:
01.040.91 Gradbeni materiali in gradnja Construction materials and
(Slovarji) building (Vocabularies)
91.100.10 Cement. Mavec. Apno. Malta Cement. Gypsum. Lime.
Mortar
91.100.30 Beton in betonski izdelki Concrete and concrete
products
oSIST prEN 18136:2025 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

oSIST prEN 18136:2025
oSIST prEN 18136:2025
DRAFT
EUROPEAN STANDARD
prEN 18136
NORME EUROPÉENNE
EUROPÄISCHE NORM
January 2025
ICS 91.100.30
English Version
Ground limestone for concrete - Definition, specifications
and conformity criteria
Additions calcaires pour béton - Définition, Gemahlener Kalkstein für Beton - Definition,
spécifications et critères de conformité Anforderungen und Konformitätskriterien
This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee
CEN/TC 104.
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
© 2025 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 18136:2025 E
worldwide for CEN national Members.

oSIST prEN 18136:2025
prEN 18136:2025 (E)
Contents Page
European foreword . 4
Introduction . 5
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 6
4 Specifications . 9
4.1 General. 9
4.2 Chemical requirements . 11
4.2.1 General. 11
4.2.2 Calcium carbonate content and total carbonate content . 11
4.2.3 Chloride content . 11
4.2.4 Moisture . 11
4.2.5 Total organic carbon content . 11
4.2.6 Total alkali content . 11
4.2.7 SiO content . 11
4.2.8 Total sulfur . 11
4.2.9 Sulfate content . 11
4.3 Physical requirements . 11
4.3.1 General. 11
4.3.2 Requirements when combined with the test cement . 12
4.3.3 Blaine surface area . 12
4.3.4 Fineness . 12
4.3.5 Particle density . 12
4.4 Other requirements . 13
4.4.1 Durability requirements . 13
4.4.2 Release of dangerous substances and emission of radioactivity . 13
4.4.3 Information to be supplied upon request . 13
5 Standard designation . 13
6 Packaging and labelling . 13
7 Sampling . 14
8 Conformity criteria . 14
8.1 General requirements . 14
8.2 Statistical conformity criteria . 15
8.2.1 General. 15
8.2.2 Inspection by variables . 16
8.2.3 Inspection by attributes . 17
8.2.4 Single result conformity criteria . 17
Annex A (informative) Assessment and Verification of Conformity . 18
A.1 General. 18
A.2 Factory production control . 18
A.2.1 General requirements . 18
oSIST prEN 18136:2025
prEN 18136:2025 (E)
A.2.2 Internal quality control . 20
A.3 Assessment of the performance of the ground limestone . 20
A.4 Autocontrol testing of samples . 20
A.4.1 Sampling and testing . 20
A.4.2 Corrective action . 21
A.4.3 Measuring and test equipment for autocontrol testing . 21
A.4.4 Quality records . 21
A.5 Tasks for the purpose of certification . 21
A.5.1 Initial inspection of the manufacturing plant and of factory production control . 21
A.5.2 Continuing surveillance, assessment and evaluation of factory production control 22
A.5.3 Reports . 23
A.5.4 Actions to be taken in the event of non-conformity - following inspection of the factory
production control and evaluation of the results of autocontrol testing . 23
A.6 Procedure for the certification of conformity of the factory production control . 23
Annex B (informative) Attestation of conformity . 24
Bibliography . 25

oSIST prEN 18136:2025
prEN 18136:2025 (E)
European foreword
This document (prEN 18136:2025) has been prepared by Technical Committee CEN/TC 104 “Concrete
and related products”, the secretariat of which is held by SN.
This document is currently submitted to the CEN Enquiry.
oSIST prEN 18136:2025
prEN 18136:2025 (E)
Introduction
The purpose of this document is to specify the requirements for ground limestone for concrete. It is based
on a survey that has been carried out in European countries already using ground limestone in concrete,
which has enabled the identification of the common core group of characteristics and common values.
The ground limestone referred to in this document, is originated from the exploitation of carbonate rock-
forming minerals (limestone, chalk, marble, dolostone).
Ground limestone is used in concrete production in some European countries, based on national
experience and tradition.
When using ground limestone conforming to this document, consider that certain properties of fresh and
hardened concrete can be influenced. Where relevant, such effects need to be considered in concrete mix
design (see EN 206).
oSIST prEN 18136:2025
prEN 18136:2025 (E)
1 Scope
This document is applicable to ground limestone intended to be used as concrete addition, and for use in
mortar and grouts.
The document specifies requirements for the chemical and physical properties as well as quality control
procedures for ground limestone, for use as an addition for production of concrete conforming to EN 206.
This document does not specify provisions for the practical application of ground limestone in the
production of concrete.
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, Methods of testing cement — Part 1: Determination of strength
EN 196-2, Method of testing cement — Part 2: Chemical analysis of cement
EN 196-3, Methods of testing cement — Part 3: Determination of setting times and soundness
EN 196-6, Methods of testing cement — Part 6: Determination of fineness
EN 196-7, Methods of testing cement — Part 7: Methods of taking and preparing samples of cement
EN 197-1, Cement — Part 1: Composition, specifications and conformity criteria for common cements
EN 933-9, Tests for geometrical properties of aggregates — Part 9: Assessment of fines - Methylene blue test
EN 933-10, Tests for geometrical properties of aggregates — Part 10: Assessment of fines - Grading of filler
aggregates (air jet sieving)
EN 1097-5, Tests for mechanical and physical properties of aggregates — Part 5: Determination of the
water content by drying in a ventilated oven
EN 1097-7, Tests for mechanical and physical properties of aggregates — Part 7: Determination of the
particle density of filler - Pyknometer method
EN 1744-1, Tests for chemical properties of aggregates — Part 1: Chemical analysis
EN 13639, Determination of total organic carbon in limestone
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— IEC Electropedia: available at https://www.electropedia.org/
— ISO Online browsing platform: available at https://www.iso.org/obp
oSIST prEN 18136:2025
prEN 18136:2025 (E)
3.1
ground limestone
fine particles obtained by grinding and/or selection, dry or in aqueous suspension, from carbonate rocks
Note 1 to entry: Eg limestone, chalk, marble, dolostone.
3.2
addition
finely divided inorganic material used in concrete in order to improve certain properties or to achieve
special properties
3.3
test cement
selected source of Portland cement according to 4.3.2.1 used for carrying out the tests needed to evaluate
conformity to the requirements of 4.3.2.2, 4.3.2.3 and 4.3.2.4
3.4
activity index
percentage of the compressive strength of standard mortar bars, prepared with 75 % test cement plus
25 % ground limestone by mass, to the compressive strength of standard mortar bars prepared with
100 % test cement, when tested at the same age
3.5
autocontrol
continuous statistical quality control of the ground limestone based on the testing of samples taken by
the producer or their agent at point(s) of release from the ground limestone producing facility
3.6
control period
period of production and/or dispatch identified for the evaluation of the autocontrol test results
3.7
characteristic value
value of the required property outside of which lies a specified percentage, the percentile Pk, of all the
values of the population
3.8
single result limit value
limit value of a chemical or physical property which – for any single test result – in the case of an upper
limit is not to be exceeded or in the case of a lower limit is, as a minimum, to be reached
3.9
allowable probability of acceptance CR
for a given sampling plan, the allowed probability of acceptance of ground limestone with a characteristic
value outside the specified minimum or maximum values
3.10
sampling plan
specific plan which states the (statistical) sample size(s) to be used, the percentile Pk, and the allowable
probability of acceptance CR
oSIST prEN 18136:2025
prEN 18136:2025 (E)
3.11
spot sample
sample taken at the same time and from one and the same place, relating to the intended tests which can
be obtained by combining one or more immediately consecutive increments
Note 1 to Entry: See EN 196-7.
3.12
certificate of conformity of the factory production control
document issued under the rules of the scheme for the Assessment and Verification of Conformity
indicating that adequate confidence is provided that factory production control is in conformity with the
relevant product specification standard
3.13
existing factory
factory for which the conformity of the factory production control has already been certified using this
European Standard
3.14
factory production control
documented, permanent and internal control of production in a factory
3.15
factory
facility used by a manufacturer for the production of ground limestone using equipment which is suitable
for continuous mass production of Ground Limestone, in particular, equipment for adequate grinding
and/or selection and the necessary silo capacity for the storage and dispatch of each ground limestone
produced
Note 1 to entry: This equipment and the production control applied allow the control of production with sufficient
accuracy to ensure that the requirements of this document are met
3.16
initial period
immediate period starting after the first issuing of the certificate of conformity of the factory production
control for a ground limestone and at the latest from the first dispatching of ground limestone
3.17
new factory
factory for which the conformity of the factory production control has not been certified using this
European Standard
3.18
certification body
third-party conformity assessment body operating certification schemes
3.19
works’ quality documentation
documentation that provides information on the factory production control which is applied by a
manufacturer at a particular factory to ensure constancy of performance of the ground limestone
oSIST prEN 18136:2025
prEN 18136:2025 (E)
4 Specifications
4.1 General
The chemical and physical requirements in 4.2 and 4.3 and are specified as characteristic or declared
values. Conformity to a characteristic value is assessed by means of a statistical quality control procedure
as described in Clause 7. The test methods prescribed in this document are reference methods. Other test
methods may be used provided they give results equivalent to those obtained with the reference method.
In case of a dispute, only the reference method shall be used.
Ground limestone shall be in accordance with one of the three categories given in Table 1 for the chemical
and physical requirements. The producer shall declare the conformity of the ground limestone to one of
the three categories.
Depending on provisions valid in the place of use:
— No Performance Declared (NPD) is possible for Fineness according to 4.3.4 when Blaine surface area
according to 4.3.3 is determined and vice versa.
— NPD is possible for soundness and initial setting time according to 4.3.2.3 and 4.3.2.2 respectively
when total sulfur and sulfate content according to 4.2.8 and 4.2.9 respectively are determined and
vice versa.
oSIST prEN 18136:2025
prEN 18136:2025 (E)
Table 1 — Chemical and physical requirements given as characteristic or declared values
a
Property Test reference Requirements
Category 1 Category 2 Category 3
CaCO (%) EN 196-2 ≥ 95 ≥ 75 ≥ 40
CaCO + MgCO (%) EN 196-2  ≥ 90 ≥ 75
3 3
Chloride content (%) EN 196-2 ≤ 0,10 ≤ 0,10 ≤ 0,10
Clay content (g/kg) EN 933-9 ≤ 3 ≤ 12 ≤ 12
b b b
Moisture (%) EN 1097-5 ≤ 1 ≤ 1 ≤ 1
c c
Total organic carbon content EN 13639 ≤ 0,2 ≤ 0,2 or ≤ 0,5 ≤ 0,2 or ≤ 0,5
(%)
Total alkali content (%) EN 196-2 To declare as a To declare as a To declare as a
maximum maximum maximum
value value value
Activity index EN 196-1 ≥ 0,71 ≥ 0,71 ≥ 0,71
2 d
Blaine surface area (m /kg) EN 196-6 ≥ 280 ≥ 220 ≥ 220
e
Fineness % < 63µm EN 933-10 > 70 > 70 > 70
e
Fineness % < 125µm EN 933-10 > 85 > 85 > 85
e
Fineness %2mm EN 933-10 100 100 100
f
Soundness (mm) EN 196-3 ≤ 10 ≤ 10 ≤ 10
f
Initial setting time (min) EN 196-3 ≤ twice of the control
g h h h
Total sulfur (%) EN 1744-1 ≤ 0,4 ≤ 0,4 ≤ 0,4
g
Sulfate content (%) EN 1744-1 ≤ 0,15 ≤ 0,15 ≤ 0,15
Particle density EN 1097-7 To declare as To declare To declare
an average
as an average as an average
value
value value
i
SiO2 content (%) EN 196–2 To declare as a To declare as a To declare as a
maximum maximum maximum
value value value
a
Requirements expressed in % are given by mass of the ground limestone.
b
To be declared if greater than 1 %.
c
The producer shall declare which limit (0,2 or 0,5) applies for category 2 and category 3.
d
When fineness is determined according to 4.3.4 Fineness and the corresponding requirements of this Table, it
is not mandatory to determine Blaine surface area.
e
When fineness is determined according to 4.3.3 Blaine surface area and the corresponding requirements of this
Table, it is not mandatory to determine fineness according to 4.3.4.
f
When total soundness and initial setting time are determined according to 4.3.2.2 and 4.3.2.3 and the
corresponding requirements of this Table, it is not mandatory to determine total sulphur and sulfate content.
g
When total sulfur and sulfate content are determined according to 4.2.8 and 4.2.9 and the corresponding
requirements of this Table, it is not mandatory to determine setting time and soundness.
h
Ground limestone may contain more than 0,4 % Total sulfur but in that case the maximum Total sulfur content
shall be declared.
i
Declaration of SiO2 content is optional, depending the provisions valid in the place of use.
oSIST prEN 18136:2025
prEN 18136:2025 (E)
4.2 Chemical requirements
4.2.1 General
The chemical properties of the ground limestone shall conform to the requirement in Table 1.
4.2.2 Calcium carbonate content and total carbonate content
The calcium carbonate content expressed as CaCO and Total Carbonate content (CaCO +MgCO ), shall
3 3 3
be determined in accordance with EN 196-2.
4.2.3 Chloride content
–
The chloride content expressed as Cl , shall be determined in accordance with EN 196-2.
4.2.3 Clay content
The clay content shall be determined by the methylene blue test in accordance with EN 933-9 and
expressed in g/kg.
4.2.4 Moisture
The moisture shall be determined in accordance with EN 1097-5 and expressed in % by mass.
Ground limestone moisture shall be declared if greater than 1 %.
In the case ground limestone is supplied in suspension, the dry mass content of the suspension shall not
deviate from the value declared by the supplier by more than ± 2 % by mass of the material when
determined by drying a representative sample of at least 5 g of suspension in a well ventilated oven at
(105 ± 5) °C to constant mass. Constant mass is considered to be reached when successive weighings at
least 1 h apart during drying at (105 ± 5) °C do not differ by more than 0,2 %
4.2.5 Total organic carbon content
The total organic carbon content (TOC) shall be determined in accordance with EN 13639 and expressed
in % by mass. The producer shall declare which limit (0,2 or 0,5) applies for category 2 and category 3.
4.2.6 Total alkali content
The total alkali content shall be determined in accordance with EN 196-2 and declared as Na Oeq. The
result is expressed in % by mass.
4.2.7 SiO content
The total content of SiO2 shall be determined in accordance with EN 196-2 and expressed in % by mass.
4.2.8 Total sulfur
The sulfur content shall be determined in accordance with EN 1744-1 and expressed in % by mass.
4.2.9 Sulfate content
The sulfate content shall be determined in accordance with EN 1744-1 and expressed in % by mass.
4.3 Physical requirements
4.3.1 General
The physical properties of the ground limestone shall conform to the requirement in Table 1.
oSIST prEN 18136:2025
prEN 18136:2025 (E)
4.3.2 Requirements when combined with the test cement
4.3.2.1 Test cement
The test cement according to EN 197-1 shall have the following requirements:
— Type CEM I;
— Strength class 42,5 or higher;
— Fineness (Blaine surface area) not less than 300 m /kg;
— Tricalcium aluminate: 6 % by mass to 12 % by mass;
— Alkalis (Na Oeq): 0,5 % by mass to 1,2 % by mass.
4.3.2.2 Initial Setting time
The initial setting time of a combination (by mass) of 25 % of ground limestone with 75 % of test cement
shall be determined in accordance with EN 196-3 and shall not be greater than twice as long as the initial
setting time of the reference cement.
4.3.2.3 Soundness
The soundness shall be determined on 25 % ground limestone plus 75 % test cement (both by mass) in
accordance with EN 196-3.
4.3.2.4 Activity index
The activity index shall be expressed as the ratio (in percent) of the compressive strength of the
combination (by mass) of 25 % of ground limestone with 75 % of test cement, to the compressive
strength of the test cement on its own. The compressive strengths shall be determined in accordance with
EN 196-1 and the “water: combination” ratio and the “water: cement” ratio shall both be 0,50. The activity
index is evaluated at 28 days.
NOTE The activity index gives no direct information on the strength contribution of ground limestone in
concrete, nor is the use of the ground limestone limited to the mixing ratio used in the activity index test.
4.3.3 Blaine surface area
The specific Blaine surface shall be determined in accordance with the air permeability method specified
in EN 196-6. The result is expressed in m /kg.
2 2
Note: 1 m /kg = 10 cm /g
4.3.4 Fineness
The fineness at 63µm, 125µm and 2mm may be determined by air jet sieving in accordance with
EN 933-10 or Laser diffraction methods in accordance with ISO 13320. In case of dispute, the air jet
sieving method according to EN 933-10 shall be used as the reference method.
Other sieves can may be provided on request.
4.3.5 Particle density
The particle density shall be determined in accordance with EN 1097-7.
oSIST prEN 18136:2025
prEN 18136:2025 (E)
4.4 Other requirements
4.4.1 Durability requirements
The composition and the performance of the ground limestone shall be such that durable concrete may
be produced when using it. Ground limestone conforming to this European Standard is deemed to satisfy
the durability requirements, provided that other requirements for durability of concrete in relevant
standards (EN 206) and/or regulations valid in the place of use are fulfilled.
4.4.2 Release of dangerous substances and emission of radioactivity
Requirements for the release of dangerou
...