Economy of RHA （Rice Husk Ash） in Concrete for Low-Cost Housing Delivery in Nigeria  

作　　者：Olonade Kolawole Adisa 

机构地区：[1]Department of Civil Engineering, Obafemi Awolowo University, lle-lfe 220005, Nigeria

出　　处：《Journal of Civil Engineering and Architecture》2013年第11期1464-1470,共7页土木工程与建筑（英文版）

摘　　要：Delivery of housing units in adequate quantity and quality has been the pursuits of individuals and successive governments in Nigeria. Still, the gap between demand and supply is becoming wider on daily basis due to exorbitant cost of building materials that is beyond the reach of average Nigerians. Concrete being the most acceptable construction material is expensive due to high cost of cement. Efforts made to reduce the cost of cement were to no avail, thus there is need to look elsewhere. Past researches showed that substituting cement with 15% of RHA （rice husk ash） in concrete improves the performance of concrete and reduces global warming as a result of emissions from cement production. This paper looks into the effect of using RHA as partial substitute of cement on the cost of a low-cost housing unit. Results showed that cement based construction materials are responsible for 82.58% of the total cost in which cement is responsible for 42%. When 15% RHA was used to substitute cement over N90,000 was saved, amounting to about 7% of the total cost of the building. In addition, depletion of natural resources was reduced.

关 键 词：Housing delivery POZZOLAN rice husk ash global warming low-cost housing. 

分 类 号：TS212.7[轻工技术与工程—粮食、油脂及植物蛋白工程] TV641.43[轻工技术与工程—食品科学与工程]