THE FAILURE OF BRITISH STANDARD TESTS IN THE PREDICTION OF AGGREGATE DURABILITY. DURABILITY AND PERFORMANCE OF BITUMINOUS HIGHWAY MATERIALS, HATFIELD POLYTECHNIC, 3-4 APRIL 1989
The limitations of the ability of conventional BS 812: 1975 test methods (see IRRD 269286-269288) to predict aggregate durability are illustrated in this paper by comparing them with new approaches to aggregate testing where the methods have been chosen on their ability to discriminate good from bad. The magnesium sulphate soundness test which is likely to be included into BS 812 as a means of assessing aggregate soundness or durability is shown to be a reliable test in the case of basalt aggregate. The disadvantages of this method are: (a) that it may not be suitable for all rockfaces and (b) it takes at least 14 working days. Alternative methods chosen mainly on their ability to provide results quickly, efficiently and which involve the minimum amount of equipment and cost are presented. These include the combination of test results to produce a durability index (for example the dynamic rock durability index or the basalt durability index) or by accelerating the existing methods by the use of microwave heating. For the covering abstract of the conference see IRRD 823743.
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Corporate Authors:
Hatfield Polytechnic, England
School of Engineering, College Lane, P.O. Box 109
Hatfield, Hertfordshire, England -
Authors:
- WOODSIDE, A R
- WOODWARD, WDH
- Publication Date: 1989
Language
- English
Media Info
- Pagination: 12 p.
Subject/Index Terms
- TRT Terms: Aggregates; Basalt; Conferences; Durability; Evaluation and assessment; Standards; Test procedures; Waves; Weathering
- Uncontrolled Terms: Micro
- Geographic Terms: United Kingdom
- Subject Areas: Data and Information Technology; Geotechnology; Planning and Forecasting;
Filing Info
- Accession Number: 00498710
- Record Type: Publication
- Source Agency: Transport and Road Research Laboratory (TRRL)
- Files: ITRD, TRIS
- Created Date: Sep 30 1990 12:00AM