文献类型：期刊文献

英文题名：Experimental study on full-volume slag alkali-activated mortars: Air-cooled blast furnace slag versus machine-made sand as fine aggregates

作者：Shi, Jinyan[1];Tan, Jinxia[1];Liu, Baoju[1];Chen, Jiazhuo[1];Dai, Jingdan[1];He, Zhihai[2]

机构：[1]Cent South Univ, Sch Civil Engn, Changsha 410075, Peoples R China;[2]Shaoxing Univ, Sch Civil Engn, Shaoxing 312000, Peoples R China

年份：2021

卷号：403

外文期刊名：JOURNAL OF HAZARDOUS MATERIALS

收录：SCI-EXPANDED(收录号：WOS:000595860700008)、、EI(收录号：20204009293445)、Scopus(收录号：2-s2.0-85091763914)、WOS

基金：This study was supported by National Key Research and Development Program of China (2017YFB1201204).

语种：英文

外文关键词：Air-cooled blast furnace slag; Fine Aggregate; Alkali-activated mortar; Solid waste; Mechanical properties

外文摘要：As the industrial waste from blast furnace ironmaking, air-cooled blast furnace slag (ACBFS) puts a lot of pressure on the environment. It is becoming more and more urgent to deal with the increasing ACBFS. In this study, the concept of "full-volume slag alkali-activated mortars (FSAM)" is proposed using ground granulated water-cooled blast furnace slag (GGBS) as aluminosilicate material and ACBFS to replace machine-made sand, aiming to solve the current situation of increasing scarcity of natural resources. The characteristics of ACBFS are investigated, and its stability and heavy metal leaching all meet the requirements as a building material. The results show that the flowability and mechanical properties of FSAM are significantly enhanced with the substitution rate of ACBFS increases. Meanwhile, the incorporation of ACBFS is also beneficial to improve the compactness of the microstructure of the mortar, thereby improving the impermeability (Water, ion and gas) of FSAM. In addition, the specimen mixed with ACBFS showed good high temperature resistance due to the porous feature of the aggregate. Furthermore, using a small amount of limestone powder to replace GGBS can slightly improve the performance of FSAM. Therefore, ACBFS is recommended to be used in FSAM, which meets safety, cost and environmental benefits.