Effect of grinding on chemical and physical properties of rice husk ash
来源期刊：International Journal of Minerals Metallurgy and Materials2009年第2期
论文作者：Prinya Chindaprasirt Rattana Mahachai
文章页码：242 - 247
摘 要：The effect of grinding on the chemical and physical properties of rice husk ash was studied. Four rice husk ashes with different finenesses,i.e. coarse original rice husk ash (RHA0),RHA1,RHA2,and RHA3 were used for the study. Ordinary Portland cement (OPC) was partially replaced with rice husk ash at 20% by weight of binder. The water to binder ratio (W/B) of the mortar was maintained at 110%±5% with flow table test. Specific gravity,fineness,chemical properties,compressive strength,and porosity test of mortars were determined. The differences in chemical composition of the rice husk ashes with different finenesses from the same batch are small. The use of RHA3 produces the mortars with good strength and low porosity. The strength of the mortar improves with partial replacement of RHA3 in comparison with normal coarse rice husk ash. The use of RHA3 results in a strong and dense mortar,which is due to the better dispersion and filling effect,as well as an increase in the pozzolanic reaction.
Prinya Chindaprasirt2，Rattana Mahachai3
2. Department of Civil Engineering,Faculty of Engineering,Khon Kaen University,40002,Thailand3. Department of Chemistry,Faculty of Science,Khon Kaen University,40002,Thailand
摘 要：The effect of grinding on the chemical and physical properties of rice husk ash was studied. Four rice husk ashes with different finenesses,i.e. coarse original rice husk ash (RHA0),RHA1,RHA2,and RHA3 were used for the study. Ordinary Portland cement (OPC) was partially replaced with rice husk ash at 20% by weight of binder. The water to binder ratio (W/B) of the mortar was maintained at 110%±5% with flow table test. Specific gravity,fineness,chemical properties,compressive strength,and porosity test of mortars were determined. The differences in chemical composition of the rice husk ashes with different finenesses from the same batch are small. The use of RHA3 produces the mortars with good strength and low porosity. The strength of the mortar improves with partial replacement of RHA3 in comparison with normal coarse rice husk ash. The use of RHA3 results in a strong and dense mortar,which is due to the better dispersion and filling effect,as well as an increase in the pozzolanic reaction.
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