AS 1141.30-1996

1 - AS 1141.30-1996 METHODS FOR SAMPLING AND TESTING AGGREGATES - COARSE AGGREGATE QUALITY BY VISUAL COMPARISON
1 - PREFACE
1 - METHOD
1 - 1 SCOPE
1 - 2 REFERENCED DOCUMENTS
2 - 3 DEFINITIONS
2 - 3.1 Graded aggregate
2 - 3.2 One-sized aggregate
2 - 3.3 Reference specimen
2 - 3.4 Source
2 - 4 APPARATUS
2 - 5 PRODUCT TEST PORTION
3 - 6 PROCEDURE
3 - 7 CALCULATIONS
4 - 8 PROCEDURE CHECK
4 - 9 REPORT
5 - APPENDIX A - REFERENCE SPECIMENS FOR SOUND, MARGINAL AND UNSOUND STONE BASED ON DEGRADATION FACTOR AND SECONDARY MINERAL CONTENT
5 - A1 GENERAL
5 - A2 PROCEDURE

Specifies the method of determining a quality classification by comparing a fresh, clean and dry sample with a reference sample from the same source by the visual quality of its larger particles.

This Standard sets out the method for determining a quality classification of coarse aggregate by visual comparison with pre-prepared reference specimens.The method is used to determine the proportion of particles in a sample with different quality characteristics which can be distinguished by visual characteristics. In some sources, it may be difficult to establish a rock quality classification based on visual comparison alone. In such cases the method is inappropriate.The method requires that the rock source or sources from which the test sample is derived is known. Where a sample contains a combination of aggregate from different sources, each component of the combination must be from a visually recognizable source.The method is appropriate for material up to 75 mm nominal size and tests that fraction of the material retained on the 4.75 mm sieve.A procedure for preparing reference specimens is detailed in Appendix A. The reference specimens shall be available for the completion of this test.

First published as AS 1141.30-1983.
Second edition 1996.