摘要
工作性能作为自密实混凝土(SCC)最重要的性能被广泛深入地研究,除了高砂率和低水灰比以外,矿物掺合料对SCC的工作性能也有很大影响。为了促进SCC的使用和发展,查阅大量国内外文献后总结出近年来矿物掺合料在SCC中的使用情况和研究现状,综述了不同矿物掺合料对SCC工作性能的影响,并归纳其作用机理。总体上讲,粉煤灰、矿渣、硅灰和石灰石粉等常用掺合料分别可以改善SCC的部分工作性能,主要作用机理包括这些粉料的“形态效应”“减水效应”和“体积效应”;而铜渣、废玻璃渣、甘蔗渣灰、浮石粉和锂渣等矿物掺合料对SCC工作性能影响的研究较少,还无法定论,仍需进一步研究。
As the most important performance of self-compacting concrete(SCC),the workability has been studied extensively and deeply.In addition to high sand ratio and low water-cement ratio,mineral admixtures also have a great impact on the workability of SCC.In order to promote the use and development of SCC,after consulting a large number of domestic and foreign documents,this paper summarizes the use and research status of mineral admixtures in SCC in recent years,reviews the influence of different mineral admixtures on the workability of SCC,and specifies their mechanism.Generally speaking,common admixtures such as fly ash,slag,silica fume and limestone powder can improve part of the workability of SCC,and the main mechanism includes the“morphological effect”,“water reducing effect”and“volume effect”of these admixtures.However,there are few studies on the effects of mineral admixtures such as copper slag,waste glass slag,bagasse ash,pumice powder and lithium slag on the workability of SCC,so they are still in doubt,and need to be further studied.
作者
王坤云
胡迪勇
杨竹
WANG Kunyun;HU Diyong;YANG Zhu(College of Environment and Civil Engineering,Chengdu University of Technology,Chengdu 610059,China)
出处
《人民珠江》
2021年第8期46-54,共9页
Pearl River
基金
四川新农村乡风文明建设研究中心开放课题项目(SCXN2019-018)。
