稻壳灰的理化性质对水泥基材料主要性能的影响综述  

Review on the influence of physicochemical properties of rice husk ash on main properties of cement-based materials

作　　者：陈瑜[1] 吴思华 丁婧雯 CHEN Yu;WU Sihua;DING Jingwen(School of Transportation Engineering,Changsha University of Science and Technology,Changsha 410114,China)

机构地区：[1]长沙理工大学交通运输工程学院,湖南长沙410114

出　　处：《混凝土》2023年第7期97-103,共7页Concrete

基　　金：国家自然科学基金青年项目(51302020)。

摘　　要：由农业副产物燃烧制备的稻壳灰(RHA)具备与硅灰媲美的火山灰活性,作为一种补充胶凝材料,能够显著提高水泥基材料的各项性能。综述RHA的生产工艺、材料性能及其对水泥基材料主要技术性能影响的相关研究,如水泥水化、强度、氯离子渗透、抗硫酸盐侵蚀、碳化和收缩等主要性能的影响。结果表明,RHA颗粒的多孔结构起到的保水功能对后期水泥水化有极好的辅助作用;基于对RHA-水泥基材料各方面性能的总结,认为RHA的优选含量范围为10%~20%。最后,由于稻壳回收存在困难、制备工艺的局限性以及缺乏分类标准等问题,导致RHA在混凝土中的应用研究还处于起步阶段,有待于进一步开拓和拓展。Rice husk ash(RHA)prepared by combustion of agricultural by-products has pozzolanic activity comparable to silica fume and can be used as a supplementary cementitious material to significantly improve the properties of cementitious materials.The production process,material properties and the influence of RHA on the main technical properties of cement-based materials are reviewed,such as cement hydration,strength,chloride penetration,sulfate resistance,carbonation and shrinkage.The results show that the porous structure of RHA particles plays an important role in the hydration of cement.Based on the summary of various properties of RHA-cement-based materials,it is considered that the optimal content range of RHA is 10%~20%.Finally,due to the difficulties in rice husk recovery,the limitations of preparation technology and the lack of classification standards,the application of RHA in concrete is still in its initial stage and needs to be further explored and expanded.

关 键 词：稻壳灰 水泥基材料 火山灰活性 微观机理 

分 类 号：TU528.041[建筑科学—建筑技术科学]