Volcanic Ash and Pumice as Cement Additives: Pozzolanic, Alkali-Silica Reaction and Autoclave Expansion Characteristics

This article reports on a study of the pozzolanic, alkali-silica reaction (ASR) and autoclave expansion characteristics of volcanic ash (VA) and pumice (VP) powder when used as cement additives. The pozzolanic activity of VA and VP was tested according to the Italian standard and found to be acceptable. Mortar cubes were specially prepared as per ASTM standards for these studies using different mixes with varying percentages of VA and VP (0-40%) as cement replacement. The results are then compared with ASTM requirements to assess the suitability of VA or VP as cement additives. The results show that the effect of VA and finely ground VP in controlling the ASR shows that the value for 10% VA or VP mix is much higher than the value of 100% required per ASTM C618. Mixes with 30% and 40% VA or VP mix satisfy this requirement. The compressive strength values of the mixes with 30% and 40% VA or VP are significantly reduced because of the presence of VA or VP. The authors conclude that the mix with the 20% VA or VP content reasonably achieves the required criteria.

  • Availability:
  • Authors:
    • Hossain, Khandaker M Anwar
  • Publication Date: 2005-6

Language

  • English

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Filing Info

  • Accession Number: 01003047
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Aug 3 2005 10:39AM