Physical and Chemical Properties of Rice Straw Ash and Its Effect on the Cement Paste Produced from Different Cement Types

This research was conducted to study the effect of partial replacing of three different types of cement (ordinary Portland cement, high-slag cement, sulphate resistance cement) with Rice Straw Ash (RSA) on the properties of produced cement pastes. Further, the study focused on incinerations and milling method, physical and chemical properties and pozzolanic activity of RSA. The effect of using RSA on water/cement ratio of the standard consistency paste as well as initial and final setting times of cement paste were investigated. The results show that both initial and final setting times increase with increasing the rice straw ash replacement percent