SIST EN 12620:2002/oprA1:2006
Aggregates for concrete
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
Relations
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
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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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.
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EN 12620:2002/prA1:2006 (E)
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.
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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
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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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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
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
50
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
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EN 12620:2002/prA1:2006 (E)
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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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."
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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.
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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
≤ 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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EN 12620:2002/prA1:2006 (E)
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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EN 12620:2002/prA1:2006 (E)
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:
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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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