Effect of mineral admixtures on the hydration heat of mortar in super high strength concrete

Title: Effect of mineral admixtures on the hydration heat of mortar in super high strength concrete
Author(s): L. Jianzhong, S. Wei, M. Changwen, L. Jiaping
Paper category : conference
Book title: International Conference on Microstructure Related Durability of Cementitious Composites
Editor(s): W. Sun, K. van Breugel, C. Miao, G. Ye and H. Chen
Print-ISBN: 978-2-35158-065-3
e-ISBN: 978-2-35158-084-4
Publisher: RILEM Publications
Publication year: 2008
Pages: 199 - 206
Total Pages: 8
Nb references: 9
Language: English

Abstract: The facts of high cement content, high hydration heat and high rate of heat evolution have seriously impeded the application of super high strength concrete. Mineral admixture is one of the best materials which can reduce the hydration head and the hydration exothermic rate of high performance concrete. The influences of silica fume, fly ash and ground granulated blastfurnace slag on the hydration heat and the hydration exothermic process of mortar in super high strength concrete at water to binder ratio of 0.24 were studied by the means of hydration heat experiments. The results show that the hydration exothermic process is accelerated, but the hydration exothermic peak is reduced with the addition of silica fume. On the other hand, with the addition of fly ash or ground granulated blast-furnace slag, the hydration exothermic process is delayed, the arrival time of the highest hydration exothermic rate is postponed, and the hydration heat and hydration exothermic rate are markedly reduce.

Online publication: 2009-06-09
Publication type : full_text
Public price (Euros): 0.00