Effects of Shirasu natural pozzolan and limestone powder on the strength and aggressive chemical resistance of concrete
Van Toan Pham
Phuong Trinh Bui
Shirasu natural pozzolan
This study investigated the effects of using limestone powder and Shirasu natural pozzolan, as partial replacements for fine aggregate, on the mechanical properties and resistance of concrete to an aggressive solution containing 3% H2SO4 and 5% MgCl2. The data show that replacing 5% of the fine aggregate with limestone powder results in more severe deterioration of the concrete by the chemical solution. However, replacing 55% of the fine aggregate with Shirasu both increases compressive strength after a 28-day cure and improves chemical resistance of concrete. In addition, the deterioration mechanism of concrete immersed in the aggressive solution was examined in this study.
Construction and Building Materials
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Graduate School of Advanced Science and Engineering
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