Effect of Using Rice husk ash to Replace Portland Cement on Compressive strength of Concrete Under Pressure mold

Abstract

 The objective of this research is to study the effect of the use of rice husk ash (RHA) as a partial replacement of cement on the compressive strength for concrete under pressure mold. By using 28-day compressive, of which equals to 240 ksc. Using RHA from biomass power plant - A.T. Biopower Co.,Ltd. in Phichit province. Two types of RHA, ground (GRH) and unground (URH) are used to replace Portland cement  at 10% and 20% by weight of binder. The compressive strengths of concrete are tested at 7, 28, 60 and 90 days, and they all show that the replacement of GRH in Portland cement type I give higher strength of concrete than URH and CON-P. For the development for compressive strength of concrete under pressure mold, the replacement of GRH at 20% by weight in Portland cement can produce higher compressive strength than the replacement of GRH at 10%.