EN 12620:2002/prA1

Aggregates for concrete

This European Standard specifies the properties of aggregates and filler aggregates obtained by processing natural, manufactured or recycled materials and mixtures of these aggregates for use in concrete.

Gesteinskörnungen für Beton

Granulats pour béton

Agregati za beton

General Information

• Status: Not Published
• ICS: 91.100.15 - Mineral materials and products
• ICS: 91.100.30 - Concrete and concrete products
• Technical Committee: CEN/TC 154 - Aggregates
• Drafting Committee: CEN/TC 154/SC 2 - Aggregates for concrete, including those for use in roads and pavements
• Current Stage: 5060 - Closure of Vote - Formal Approval
• Start Date: 15-Jan-2008
• Due Date: 10-Jan-2009
• Completion Date: 15-Jan-2008
• Directive: 305/2011 - Regulation (eu) No 305/2011 of the European Parliament and of the Council of 9 march 2011 laying down harmonised conditions for the marketing of construction products and repealing council directive 89/106/eec
• Directive: 89/106/EEC - Construction products
• Mandate: M/125 - Mandate to CEN/CENELEC concerning the execution of standardization work for harmonized standards on aggregates
• Ref Project: SIST EN 12620:2002/oprA1:2006 - Aggregates for concrete

Relations

• Merged Into: EN 12620:2002+A1:2008 - Aggregates for concrete
• Effective Date: 18-Jan-2023
• Amends: EN 12620:2002 - Aggregates for concrete
• Effective Date: 22-Dec-2008

Overview

EN 12620:2002/prA1 - Aggregates for Concrete is a crucial European standard developed by CEN Technical Committee CEN/TC 154. This standard defines the properties and classification requirements for aggregates and filler aggregates used in concrete production. It covers natural, manufactured, and recycled aggregates, including mixtures, ensuring consistent quality for concrete construction applications. The amendment (prA1) introduces provisions for recycled aggregates, enhancing sustainability in concrete production by addressing their specific testing, classification, and chemical properties.

Key Topics

• Aggregate Types and Sources
  EN 12620:2002/prA1 includes natural, manufactured, and recycled aggregates, clearly defining requirements for each type. Recycled aggregates are extensively addressed with specific test methods, reflecting their growing importance in sustainable concrete production.

• Physical and Chemical Properties

  • Volume Stability: Drying shrinkage tests following EN 1367-4 apply, with special guidelines for recycled aggregates.
  • Chemical Composition: Chloride content, sulfate levels, and organic contaminants are regulated to prevent adverse effects on concrete durability and setting time. New test standards like prEN 933-11, prEN 1744-5, and prEN 1744-6 support these evaluations.
  • Influence on Setting Time: Recycled aggregates undergo tests to assess their impact on cement paste setting, ensuring concrete performance consistency.

• Classification of Recycled Aggregates
  The standard specifies detailed constituent classifications for coarse recycled aggregates using percentage mass categories. This classification helps producers and users verify compliance and compatibility with concrete mix designs.

• Factory Production Control (FPC)
  Stringent monitoring procedures for raw materials, especially for recycled aggregates, include documentation of origin, suppliers, and transport. Minimum testing frequencies for key properties are defined to maintain quality assurance.

• Durability Considerations
  Annexes include guidance on weathering resistance, alkali-silica reactions, and the effect of chemical constituents specifically for recycled aggregates. These help predict long-term concrete performance and durability.

Applications

• Concrete Production
  EN 12620:2002/prA1 ensures that aggregates used in ready-mixed and precast concrete comply with strict quality and safety parameters, including indicators of durability, chemical stability, and physical characteristics.

• Sustainable Construction
  By incorporating recycled aggregates, this standard supports environmentally friendly construction practices, encouraging reuse of materials while safeguarding structural integrity.

• Quality Assurance in Construction Materials
  Producers and suppliers of aggregates benefit from standardized testing procedures and classification systems, facilitating consistent product specification and effective communication along the supply chain.

• Compliance with European Regulations
  The standard aligns with key EU Directives such as 89/106/EEC, enabling CE marking and compliance documentation for concrete aggregates marketed within the European Union.

Related Standards

• EN 1367-4 – Tests for mechanical and physical properties of aggregates, including drying shrinkage relevant to volume stability.
• prEN 933-11 – Classification test methods for constituents of coarse recycled aggregates.
• prEN 1744-1, -5, and -6 – Chemical test methods for aggregates, including determination of acid soluble chlorides and influence on cement setting.
• EN 1744-1 – General chemical properties test methods for aggregates.
• EN 1097-6 – Determination of particle density and water absorption of aggregates.

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Keywords: EN 12620, aggregates for concrete, recycled aggregates, concrete aggregates standard, aggregate classification, chemical properties, volume stability, sustainable construction materials, CEN standards, factory production control, concrete durability, European standard for aggregates, chloride content, sulfate content, alkali-silica reaction, concrete quality control.

Standards Content (Sample)

SLOVENSKI SIST EN
12620:2002/oprA1:2006
PREDSTANDARD
september 2006
Agregati za beton
Aggregates for concrete
ICS 91.100.15; 91.100.30 Referenčna številka
©  Standard je založil in izdal Slovenski inštitut za standardizacijo. Razmnoževanje ali kopiranje celote ali delov tega dokumenta ni dovoljeno

EUROPEAN STANDARD
DRAFT
EN 12620:2002
NORME EUROPÉENNE
EUROPÄISCHE NORM
prA1
June 2006
ICS 91.100.15; 91.100.30
English Version
Aggregates for concrete
Granulats pour béton Gesteinskörnungen für Beton
This draft amendment is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee CEN/TC 154.
This draft amendment A1, if approved, will modify the European Standard EN 12620:2002. If this draft becomes an amendment, CEN
members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for inclusion of this amendment
into the relevant national standard without any alteration.
This draft amendment 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 Management Centre has the same status
as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,
Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania,
Slovakia, Slovenia, Spain, Sweden, Switzerland 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
Management Centre: rue de Stassart, 36  B-1050 Brussels
© 2006 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 12620:2002/prA1:2006: E
worldwide for CEN national Members.

Foreword
This document (EN 12620:2002/prA1:2006) has been prepared by Technical Committee CEN/TC
154 "Aggregates", the secretariat of which is held by BSI.
This document is currently submitted to the CEN Enquiry.
This amendment introduces clauses for recycled aggregates. The clauses call up new test
methods, prEN 933-11, prEN 1744-5 and prEN 1744-6 and an amendment to EN 1367-4. These
standards are at an advanced stage of preparation.
This Amendment to the European Standard EN 12620: 2002 has been prepared under a
mandate given to CEN by the European Commission and the European Free Trade Association,
and supports essential requirements of EU Directive 89/106 EEC.
For relationship with EU Directive(s), see informative Annex ZA, which is an integral part of this
document.
2 Normative references
Insert the following normative references:

prEN 933-11, Tests for geometrical properties of aggregates – Part 11: Classification test for the
constituents of coarse recycled aggregates

prEN 1744-5, Tests for chemical properties of aggregates – Part 5: Determination of acid soluble
chloride salts
prEN 1744-6, Tests for chemical properties of aggregates – Part 6: Determination of the influence
of recycled aggregate extract on the initial setting time of cement

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5 Physical requirements
5.7.2 Volume stability – drying shrinkage

'NOTE' 'NOTE 1'.
Delete and substitute
Add new note as follows:
"NOTE 2 For recycled aggregates, when required, the drying shrinkage associated with the aggregates
should be determined in accordance with Annex A of EN 1367-4."

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Add new sub-clause 5.8 as follows (and renumber all subsequent Tables in the standard):

5.8 Classification of the constituents of coarse recycled aggregates and
recycled concrete aggregates
The proportions of constituent materials in coarse recycled aggregate shall be determined in
accordance with prEN 933-11 and shall comply with the requirements of Table 18.

Table 18 – Categories for constituents of coarse recycled aggregates

Constituent Content Category
Percentage by mass
R ≥90 R 90
C C
R 70
≥70 C
R Declared
<70 C
No requirement R NR
C
R +R R 90
≥90
C U CU
R 70
≥70 CU
R 50
≥ CU
R Declared
CU
<50
No requirement R NR
CU
R ≤10 R 10
B B
R 30
≤30 B
R 50
B
≤50
R Declared
B
>50
No requirement R NR
B
R R 1-
A ≤1 A
R 5-
≤5 A
R 10-
≤10 A
FL +FL FL 1
S NS ≤1 total
FL 3
≤3 total
FL FL 0,01
NS ≤0,01 NS
FL 0,05
≤0,05
NS
FL 0,1
≤0,1 NS
X+R ≤0,2 X R
G G0,2
X R
≤0,5 G0,5
X R
G1
≤1
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6 Chemical requirements
6.2 Chlorides
Add the following at the end of the sub-clause (i.e. after the NOTE):
"The acid-soluble chloride ion content of recycled aggregates for concrete shall be determined in
accordance with prEN 1744-5, and shall, on request, be declared by the producer."

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Add new sub-clause 6.3.3 as follows:
6.3.3 Water soluble sulfate content of recycled aggregates

When required, the water soluble sulfate content of recycled aggregates determined in
accordance with EN 1744-1, shall be declared in accordance with the relevant category specified
in Table 22.
Table 22 – Categories for maximum values of water-soluble sulfate content
of recycled aggregates
Water-soluble sulfate content Category
Percentage by mass SS
≤ SS
0,2 0,2
No requirement SS
NR
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6.4 Other constituents
6.4.1 Constituents which alter the rate of setting and hardening of concrete
Delete the last paragraph ("When required . . . . results declared.") and substitute the following
new text and table:
"When required, the presence of lightweight organic contaminators shall be tested in accordance
with EN 1744-1.
When required, recycled aggregates shall be assessed for the influence of water-soluble
materials from the aggregates on the initial setting time of cement paste in accordance with prEN
1744-6. The aggregate shall comply with the requirements of Table 23."

Table 23 – Categories for influence of water-soluble materials
from recycled aggregates on the initial setting time of cement paste

Change in initial setting time Category
(%) (A)
≤ 7 A
A25
≤ 25
A
> 25 Declared
No requirement ANR
Two screening tests for the presence of organic matter are in common use, the sodium hydroxide
test and the fulvo acid test (see EN 1744-1, 15.1 and 15.2). Both tests may be applied to
recycled aggregates. If the supernatant liquid in these tests is lighter than the standard colours
the aggregates may be considered to be free from organic matter.

NOTE 3 Sugars do not affect the colour of the supernatant liquid in the sodium hydroxide or the fulvo
acid test. If it is suspected that sugars or sugar type materials are present, the aggregate should be tested
using the water extract test (see EN 1744-6). The requirements for the influence on setting time shown
above should apply."
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8 Designation
8.1 Designation and description

Delete "c) aggregates size" and substitute the following:
"c) for recycled aggregate, the class according to Table 18;
d) aggregate size
NOTE For recycled aggregate, the processing depot will suffice for the source in (a). Type should be
given as recycled aggregate in (b)."

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Annex F
(informative)
Notes for guidance on the freezing and thawing resistance of aggregates

F.2.4 Other indicative tests
Insert the following paragraph at the end of the sub-clause:
"It should be noted that if recycled aggregates containing cementitious materials are to be tested
for weathering resistance, then the magnesium sulfate test is unsuitable."

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Annex G
(informative)
Guidance on the effects of some chemical constituents or aggregates
on the durability of concrete in which they are incorporated.
G.1 Chlorides
G.1.1 Chlorides in natural aggregates
Insert a new subclause title " " below the main
clause title "G.1 Chlorides" (and above the existing text).

Insert the following new subclause below the existing text:
"G.1.2 Chlorides in recycled aggregate
For recycled aggregates, particularly those containing hardened concrete or mortar, chlorides
may be combined in the calcium aluminate and other phases. The combined chlorides are
unlikely to be extracted using water in the procedures described in Clause 7 of EN 1744-1 even if
the sample is ground to a fine powder before extraction.
For most recycled aggregates, chloride ion contents are likely to be low. The acid-soluble
chloride content, determined in accordance with prEN 1744-5, will probably overestimate the
availability of chlorides and this value should be used in the calculation of the chloride ion content
of the concrete. This may provide an additional margin of safety."

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G.2  Sulfates
Insert the following new paragraph below the existing text:
"Water-soluble sulfates in recycled aggregates determined in accordance with EN 1744-1 are
essentially potentially reactive sulfates (e.g. gypsum plaster) and may also give rise to expansive
disruption of concrete."
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G.3  Alkali-silica reaction
G.3.1 Alkali-silica reaction with natural aggregates
Insert a new subclause title "  "
below the main clause title "G.3 Alkali-silica reaction" (and above the existing text).

Insert the following new subclause below the existing text:
"G.3.2  Alkali-silica reaction with recycled aggregate
The use of recycled aggregates may influence the suitability of the above precautions. In the case
of recycled conc
...