Study on concrete with rice husk ash

摘要

Rice husk ash (RHA) possesses high pozzolanic activities and very suitable as partial replacement of cement in concrete. Thisrnpaper presents a comparative study on use of RHA as partial replacement of cement in concrete specimens. Review of thernresearches on physical, mechanical and structural properties of concrete containing RHA as partial replacement of ordinaryrnPortland cement was included in this paper. Simultaneously, concrete specimens were tested with different percentages ofrnRHA as replacement of cement content and with different w/c ratio. Compressive strength, flexural strength, tensile strengthrnand slump test were carried out to evaluate the appropriateness of using RHA in concrete. The replacement of cement byrnRHA in structural concrete represents a good alternative in as economical as strength consideration of concrete, even withoutrnany kind of processing and found environmental benefits related to the disposal of waste. Review of researches shows thatrnRHA-used concrete can resist chloride penetration more than normal ordinary Portland cement concrete.