INDEX OF AGGREGATE PARTICLE SHAPE AND TEXTURE OF COARSE AGGREGATE AS A PARAMETER FOR CONCRETE MIX PROPORTIONING

The size, grading, shape and surface texture of aggregates have significant influence on the properties of concrete, both in fresh and hardened state. Specifications in various codes, on concrete mix proportioning, regarding size and grading of the aggregate are much more clear than their counterparts regarding shape and surface texture, which is broadly classified into angular/crushed and rounded/uncrushed. The lack of quantitative definition of aggregate particle shape and surface texture often leads to inconsistent results, and requirement of number of trials for achieving desirable properties of concrete. This article discusses the use of the Index of Aggregate Particle Shape and Texture (IAPST) as per ASTM D-3398-97, which provides a quantitative measure of shape and surface texture of aggregate. The authors present data for 45 concrete mixes and consider the potential of IAPST of coarse aggregate as a parameter for concrete mix proportioning. The relationship of IAPST of coarse aggregate with water content, VFFA and compaction factor indicates its importance as a useful parameter for further rationalizing the process of concrete mix proportioning.

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  • Corporate Authors:

    Elsevier

    The Boulevard, Langford Lane
    Kidlington, Oxford  United Kingdom  OX5 1GB
  • Authors:
    • Jamkar, S S
    • Rao, CBK
  • Publication Date: 2004-11

Language

  • English

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Filing Info

  • Accession Number: 00986434
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Feb 8 2005 12:00AM