文献类型：期刊文献

英文题名：Experimental investigations on the mechanical behavior of iron tailings powder with compound admixture of cement and nano-clay

作者：Li, Na[1];Lv, Shaowei[1];Wang, Wei[1];Guo, Jia[2];Jiang, Ping[1];Liu, Yong[3,4]

机构：[1]Shaoxing Univ, Sch Civil Engn, Shaoxing 312000, Zhejiang, Peoples R China;[2]China Univ Geosci Wuhan, Fac Engn, Dept Civil Engn & Mech, Wuhan 430074, Hubei, Peoples R China;[3]Wuhan Univ, State Key Lab Water Resources, Wuhan 430072, Peoples R China;[4]Wuhan Univ, Hydropower Engn Sch, Wuhan 430072, Peoples R China

年份：2020

卷号：254

外文期刊名：CONSTRUCTION AND BUILDING MATERIALS

收录：SCI-EXPANDED(收录号：WOS:000540695700043)、、EI(收录号：20201808590868)、Scopus(收录号：2-s2.0-85083817011)、WOS

基金：This research was funded by the National Natural Science Foundation of China (Grant numbers [41772311, 51568044]), the Zhejiang Provincial Natural Science Foundation of China (Grant number [LY17E080016]), the Open Research Fund of State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Science (Grant number [Z017013]), the Scientific Research Projects of Zhejiang Department of Housing and Urban and Rural Construction (Grant number [2017K179]), and the International Scientific and Technological Cooperation Projects of Shaoxing University (Grant number [2019LGGH1007]).

语种：英文

外文关键词：Iron tailings powder; Cement; Nano-clay; Composite materials; Mechanical behavior; Micro-scale investigation

外文摘要：In order to examine the mechanical performance of iron tailings powder (ITP) with compound admixture of cement and nano-clay, the mixture ratio of different cement and nano-clay is designed to prepare two kinds of ITP-based materials. The first kind ITP-based material is ITP mixed with 5%, 10%, 20% and 30% cement, and the second kind ITP-based material is the first kind materials mixed with 10% cement and 5% or 10% nano-clay. The unconfined compression strength (UCS) test, scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS) of two kind materials are measured with 7 days and 28 days curing periods, respectively. Results of the UCS test showed that cement and nano-clay are all beneficial for enhancing the UCS of iron tailings powder. When 5-10% nano-clay is substituted for 10% cement, the enhancement in the unconfined compression strength of cement iron tailings powder is nearly similar. Micro-test results showed that the increase in strength could be due to the involvement of cement in the hydration. The main function of nano-clay is to make the microstructure more compact owing to its small particle size. (C) 2020 Elsevier Ltd. All rights reserved.