BS EN 12620:2002 pdf download
BS EN 12620:2002 pdf download.Aggregates for concrete.
b) 1 % S by mass for aggregates other than air-cooled blastfumace slag.
Special precautions are necessary if pyrrhotite. (an unstable (omi of iron sulfide FeS). is present in the aggregate If this mineral is known to be present, a maximum total sulfur content of 0.1 % as S shall apply.
6.4 Other constituents
6.4.1 Constituents which alter the rate of setting and hardening of concrete
Aggregates and filler aggregates that contain organic or other substances in proportions that alter the rate of setting and hardening of concrete shall be assessed for the effect on stiffening time and compressive strength in accordance with EN 1744.1:1998, 15.3.
The proportions of such materials shall be such that they do not:
a) increase the stiffening time of mortar test specimens by more than 120 min
b) decrease the compressive strength of mortar test specimens by more than 20 % at 28 days.
The presence of organic matter shall be determined in accordance with EN 1744-1:1998. 15.1 (determination of humus content), If the results indicate a high humus content, the presence of fulvo acids shall be determined in accordance with EN 1744-1:1998. 15.2. If the supernetant liquid in these tests is lighter than the standard colours the aggregates shall be considered to be tree from organic matter
NOTE 1 Some inorganic compounds wiich discolour the supernatant liquid in the humus content test do not acfversely affect the setting and hardenwig of concrete
NOTE 2 Sugars do not affect the colour of the supernatant lI,ad In the humus conten test or the tulvo acid test. If It suspected that augers or sugar type matenals we present, the aggregate should be tested using the mortar specimen test (see EN 1744-1:1 PQfl, 15.3). The sbffenang time and compressive strength requirements shown above shoiid apply.
When required the presence of lightweight organic oontaminators shall be tested in accordance with EN 1744-1:1998, 14.2 and the results declared.
6.42 Constituents which affect the volume stability of air-cooled blastfurnace slag
6.4.2.1 Air-cooled blastfurnace slag aggregate shall be free from dicalcium silicate oisintegralon when tested in accordance with EN 1744.1:1998,19.1.
6.4.2.2 Air-cooled blastfurnace slag aggregate shall be free from iron disintegration when tested in accordance with EN 1744-1:1998. 19.2.
6.5 Carbonate content of fine aggregates for concrete pavement surface courses
When it is required to control the carbonate content in fine aggregates for use in concrete surface courses, the carbonate content shall be determined as specified in EN 196-21:1989, clause 5, with the test portion being prepared in accordance with EN 1744-1:1998, 12.3 and the results declared
7 Evaluation of conformity
7.1 General
The producer shall undertake initial type tests (see 7.2) and factory production control (see annex H) to ensure that the product conforms to this European Standard and to declared values as appropriate.
7.2 Inhtialtype tests
Initial type tests relevant to the intended end use shall be carried out to check compliance with specified requirements in the following circumstances:
a) a new source of aggregates is to be used
b) there is a major change in the nature of the raw materials or in the processing conditions whidi may affect the properties of the aggregates
The results of the initial tests shal be documented as the starting point of the factory production control for that
material. This shall particularly indude the Identification of any components likely to emit radiation above normal background levels, any components likely to release polyaromatic carbons or other dangerous substances. If the content of any of these components exceeds the Iwnits in force according to the provions valid in the place of use of the aggregate, the results of the initial tests shall be declared.
7.3 Factory production control
The producer shall have in place a system of factory production control that complies with the requirements of annex H.
The records held by the producer shall indicate what quality control procedures are In operation during the production of the aggregate.
NOTE The form of ,lrol applied to any aggregate depends upon Its Intended use and the regulations relating to that 4
8 Designation
8.1 Designation and description
Aggregates shall be identified in the following temis:
a) source and producer- if the matenel has been rehand led ma depot both source and depot shall be given;
b) type of aggregate (see EN 932-3):
C) agegate size.
8.2 Additional information for the description of an aggregate
The necessity for other information depends on the situation and end use. for example:
a) a code to relate the designation to the description:
b) any other additional information needed to identify the particular aggregate.
