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

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SIST EN 12620:2002/oprA1:2006
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september 2006
Agregati za beton
Aggregates for concrete
ICS 91.100.15; 91.100.30 Referenčna številka
SIST EN 12620:2002/oprA1:2006(en)

© Standard je založil in izdal Slovenski inštitut za standardizacijo. Razmnoževanje ali kopiranje celote ali delov tega dokumenta ni dovoljeno

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EN 12620:2002
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.
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.
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EN 12620:2002/prA1:2006 (E)

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

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EN 12620:2002/prA1:2006 (E)
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


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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EN 12620:2002/prA1:2006 (E)

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
R 70
≥70 C
R Declared
<70 C
No requirement R NR
R +R R 90
R 70
≥70 CU
R 50
≥ CU
R Declared
No requirement R NR
R ≤10 R 10
R 30
≤30 B
R 50
R Declared
No requirement R NR
R R 1-
A ≤1 A
R 5-
≤5 A
R 10-
≤10 A
S NS ≤1 total
FL 3
≤3 total
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EN 12620:2002/prA1:2006 (E)
FL FL 0,01
NS ≤0,01 NS
FL 0,05
FL 0,1
≤0,1 NS
X+R ≤0,2 X R
G G0,2
≤0,5 G0,5


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EN 12620:2002/prA1:2006 (E)
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."


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


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.
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EN 12620:2002/prA1:2006 (E)

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
≤ 25
> 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."


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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EN 12620:2002/prA1:2006 (E)
Annex F
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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EN 12620:2002/prA1:2006 (E)
Annex G
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."


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."


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:
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EN 12620:2002/prA1:2006 (E)
"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

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