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Geological Society, London, Engineering Geology Special Publications; 1998; v. 13; p. 149-157;
DOI: 10.1144/GSL.ENG.1998.013.01.12
© 1998 Geological Society of London

Section 3: Aggregate testing and the use of alternative aggregates

Assessing the wear characteristics of aggregate exposed at the road surface

A. R. Woodside & W. D. H. Woodward

Highway Engineering Research Centre, School of the Built Environment, University of Ulster,, 75 Belfast Road, Carrickfergus, Co. Antrim BT 38 8PH, UK

This paper considers the assessment of highway surfacing aggregate wear using the Aggregate Abrasion Value and micro-Deval test methods. Their historical development is discussed. The influence of test sample preparation and number of chippings assessed is compared. Data for both methods are presented for a range of rock types. Dry, wet and soaked versions of the micro-Deval test are compared. The use of a density correction to modify the micro-Deval test value is proposed. The ability of the Aggregate Abrasion Value and micro-Deval test methods to assess heterogeneous aggregates is assessed.