Study of the effect of Silica fume on the Self-healing ability of High Strength Concrete with Crystalline Admixture
Keywords:
Crystalline Admixture, High strength Concrete, Self-healing, Silica FumeAbstract
The aim of this study is analyzing the self-healing capability of High strength concrete (M70) with Silica fume
and Crystalline admixture in four types of environmental exposures i.e. Water Immersion, Wet/Dry Cycles, Water contact
and Air Exposure. The percentage replacement of cement with silica fume were: 5%, 10%, 15% and with the addition of
1.1 % crystalline admixture .The specimens were pre-cracked at 28 days, in the range of 0.10-0.40 mm and the time set
for healing was 42 days. The result shows that all the mixes have considerable amount of closing ability and strength
regaining capability for all exposure conditions. The concrete with 10% Silica Fume (SF) and 1.1% Crystalline
Admixture (CA) has complete crack closing ability and 100% strength regained capability for WI and W/D conditions.