EFFECT OF SOME ADMIXTURES ON HEAT OF HYDRATION REACTION OF CEMENT PASTES PRODUCED IN YEMEN, SAUDI ARABIA, AND EGYPT.

Document Type : Research Paper

Authors

1 Associate Professor, Department of Chemistry, University of Sana'a Yemen.

2 Associate Professor, Department of Chemistry, University of Sana'a, Yemen

3 Graduated student , Department of Chemistry, University of Sana'a, Yemen.

Abstract

Blended cement pastes were prepared with and without silica fume and fly ash using an initial water/cement ratio of 0.40. Effect of these two mineral admixtures (silica fume, and fly ash) on the heat evolution of hydration reactions of Portland cement produced in Yemen, Egypt and Saudi Arabia has been studied at various hydration times. The heat of hydration of OPC in the presence of admixtures was studied, by using calorimetric method. The results show that the heat of hydration of Portland cement is retarded in the presence of both the admixtures

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JES. Journal of Engineering Sciences
Volume 37, No 5
September and October 2009
Pages 1041-1048

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