BS 812-123:1999

Committees responsible
Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Principle
5 Sampling
6 Apparatus
7 Materials
8 Preparation of aggregate test portions
9 Mix design
10 Temperature and humidity conditions
11 Preparation of test prisms
12 Storage and measurement
13 Calculation and expression of results
14 Test report
Annex A (informative) - Procedure for checking the
        uniformity of the temperature within the room
        or cabinet used for storing the test prisms
        at (38 +/- 2) degree C
Annex B (normative) - Proforma for calculating batch
        masses
Annex C (informative) - Precision
Bibliography

Defines a method of measuring the expansion of concrete produced by alkali-silica reaction involving specific combinations of aggregates.

This British Standard specifies a method of measuring the expansion of concrete produced by alkali-silica reaction involving specific combinations of aggregates.

The method is designed as an accelerated laboratory test for a specific combination of aggregates and is not considered to be a performance test for concrete.

NOTE Aggregates are usually tested in the same combination as when they are actually used. When the aggregate combination to be used is not decided, however, the test sample of aggregate is tested in combination with both an inert aggregate and an aggregate geologically similar to itself in proportions specified in the method. This procedure provides a generally satisfactory assessment of the aggregate by accommodating any pessimum value which it may possess.