Journal
CONSTRUCTION AND BUILDING MATERIALS
Volume 48, Issue -, Pages 479-484Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.conbuildmat.2013.07.016
Keywords
Delayed ettringite formation; Expansion; Mortars; Pozzolan; Heat curing
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Delayed Ettringite Formation (DEF) is an internal sulfate attack caused by early age heating to a temperature of over 70 degrees C. In this paper, the effect of natural Algerian pozzolan on the expansion of cement mortars caused by DEF was investigated. For this purpose, a portion of cement was replaced by natural pozzolan, with three different dosages (10%, 20% and 30%) and finenesses (fine, medium, and coarse). The results obtained highlighted the significant effects of natural pozzolan on DEF and the correlation existing between the expansion of the heat-cured mortars and the evolution of their mechanical properties. (C) 2013 Elsevier Ltd. All rights reserved.
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