ISSN: 1546-962X
Page Count: 12

A Logical Pozzolanic Index and Its Use in Concrete Proportioning

Dunstan, ER
Director of Technical ServicesPh.D. Research, CemexUniversity of South Florida, TampaTampa,Florida

A, Zayed
Associate Professor, University of South Florida, Tampa,Florida

(Received 20 May 2005; accepted 24 October 2005)

Abstract

A new approach to pozzolanic index is proposed. The proposed index (from 0 to 1) is based on the percentage of the pozzolan that reacts with lime. The index is logical in that it is a description of the level of reactivity of the pozzolan. The optimum pozzolan percentage for use with cement can be calculated using the index. An index can be estimated from pozzolanic reactions with lime or based on its contribution to the strength of concrete or mortar. A model for concrete strength incorporating the index is proposed that can be used to estimate concrete strength.

Keywords:
pozzolan, index, concrete, proportioning, optimum

Paper ID: JAI13416
DOI: 10.1520/JAI13416
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