Effect of Rice Husk Ash as cement replacement in the compressive strength of hydraulic cement mortar cube

This study introduces the use of Rice Husk Ash (RHA) as a cement replacement in testing the compressive strength of hydraulic cement mortar cubes. The sample cement and sand were acquired from a local hardware store and the RHA from rice mills of Bocaue, Bulacan. The sample mortars were molded from 2-in. cubes using a cement-sand ratio of 1:2.75 (1 part cement, 2.75 parts sand by weight). The samples were tested during its 15th day strength. Regression equations and correlation were obtained to provide the best fit curve that can be used in predicting the compressive strength of a cement mortar with RHA replacement. Other physical and chemical properties are not taken into notice in this study.