BS 812-112:1990

Committees responsible
Foreword
1 Scope
2 Definitions
3 Principle
4 Sampling
5 Apparatus
6 Preparation of test portions and specimens
7 Procedure
8 Calculations and expression of results
9 Precision
10 Test report
Appendix A - Recommended method for determining
             the aggregate impact value for other
             size fractions of aggregate
Appendix B - Details of the evaluation of precision data
Publications referred to

Methods which give a relative measure of the resistance of an aggregate to sudden shock or impact.

This Part of BS 812 describes methods for the determination of the aggregate impact value (AIV) which gives a relative measure of the resistance of an aggregate to sudden shock or impact.

Two procedures are described, one in which the aggregate is tested in a dry condition, and the other in a soaked condition.

The methods are applicable to aggregates passing at 14.0 mm test sieve and retained on a 10.0 mm test sieve. For smaller size fractions, a recommended method is described in appendix A.

Aggregate sizes larger than 14 mm are not appropriate to the aggregate impact value test.

NOTE 1 For the determination of the resistance of an aggregate to a slowly applied compressive load, see BS 812-110.

NOTE 2 The titles of the publications referred to in this standard are listed in the inside back cover.