Chloride Resistance of Concrete with Bottom Ash from MSW Power Plant

Abstract

The objective of research is to use the bottom ash from municipal solid waste (MSW) power plant to improve concrete properties. The chloride resistance of concrete is investigated. The bottom ash ratios to fine aggregate replacement are 0%, 10%, 20%, 30%, 40%, and 50% by weight. Cube compressive strength is designed 240 ksc and 320 ksc at 28 days of curing. The results are shown that the compressive strength and the density of concrete reduce with increasing the bottom ash in mixed concrete. On the contrary, the results of water absorption of concrete trends to increase with increasing the replacement ratio. The chloride penetration is evaluated by using measurement of the total charge passed in accordance with ASTM C1202. The ability of chloride ions to penetrate the concrete is high level for all replacement ratios at 28 days of curing. Therefore, this research indicates that the MSW bottom ash can be replaced fine aggregate in concrete mixes. The concrete containing MSW bottom ash provides the low chloride resistance. The concrete can be used in the area with low chloride content, such as in areas far from the sea.