Effect of moisture content of wet fly ASH on basic properties of mortar and concrete

Abstract

This study is aimed to investigate feasibility of using wet low CaO fly Ash as a cement replacing material in concrete. Effect of moisture content of wet fly Ash on basic properties of mortar and concrete is studied. The properties of mortar and concrete made with the wet fly Ash are investigated and compared with those made with dry fly ash. Wet fly ashes prepared in the laboratory are used in the investigation. Moisture contents of the wet fly ashes are 25%, 45%, and 65%. The wet exposure period of fly Ash is 3 months. The test results revealed that strength activity index and flow of mortar made with wet fly Ash are slightly improved. Slump and compressive strength of concrete made with wet fly Ash are also improved when compared to those made with dry fly ash. The effect of different moisture contents of the wet fly Ash can be explained by the concept of double mixing method. The micro hardness test results showed that ITZ of the concrete made with wet fly Ash is improved due to the effect of double mixing method.