Journal
CEMENT AND CONCRETE RESEARCH
Volume 32, Issue 8, Pages 1181-1188Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/S0008-8846(01)00717-7
Keywords
alkali-activated cement; calorimetry; hydration; compressive strength
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This paper examines the early hydration of alkali-slag cements activated with water glass with different n moduli and sodium metasilicate (Na2SiO3-5H(2)O) in solution at 25 degreesC. The early hydration of alkali-activated blast furnace slag cements has been studied using isothermal conduction calorimetry. The cumulative heat of hydration increases by increasing the n modulus as well as the dosage of water glass, but is still lower than that of Portland cement. The compressive strength of normal-cured water glass slag cements is higher than Portland cement mortars. Drying shrinkage of alkali-slag cements is considerably higher than that of Portland cement. Consequently, industrial use of alkali-slag cement needs better understanding of the hardening mechanism and requires further research based on presented observations and results. (C) 2002 Elsevier Science Ltd. All rights reserved.
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