详情

Use of Rice Husk Ash (RHA) in Flowable Fill Concrete Mix Material

项目名称：	Use of Rice Husk Ash (RHA) in Flowable Fill Concrete Mix Material
摘要：	Rice hull (RH) is one of the main agricultural residues obtained from the outer covering of rice grains during the milling process. RH constitutes 20% of about 700 million tons of paddy produced in the world. When burnt, 20% of RH is transformed into rice husk ash (RHA). RHA is a cementitious material, and locally produced RHA in Arkansas contains about 75% silica in an amorphous form and has an extremely high surface area. RHA is also economically beneficial in producing concrete, but its performance as a construction material has been investigated very little. Based on the preliminary data of the research team of this project, locally produced RHA is not capable of producing �regular� concrete of compressive strength of greater than 3000 psi. Rather, low strength concrete such as Flowable Fill Concrete (FFC) can be produced using the �as is� RHA. However, the usage, test protocols and procedures of FFC are different from �regular� concrete. Arkansas Department of Transportation (ARDOT) has ranked this problem statement in its Top 10 Problems for possible solution in 2018-2019. The main objective of the proposed study is to assess the feasibility of the use local RHA in producing FFC. Specific objectives are to: (i) prepare FFC and determine their workability and flow behavior, (ii) evaluate the effect of curing time and environmental conditions on strength properties and durability of RHA-modified FFC, and (iii) evaluate the optimum dosages of RHA as pozzolan in preparing FFC.
状态：	Completed
资金：	79010
资助组织：	Office of the Assistant Secretary for Research and Technology
管理组织：	Transportation Consortium of South-Central States
项目负责人：	Hossain, Zahid
执行机构：	Arkansas State University
主要研究人员：	Hossain, Zahid
开始时间：	20180315
预计完成日期：	20190915
实际结束时间：	20190915