正交试验法在低掺量碱渣全固废混凝土中的应用  

Application of Orthogonal Test Method in Low Alkaline Solid Waste Concrete

作　　者：李亚齐[1] 倪文[1] 徐东[1] 高巍[1] Li Yaqi Ni Wen Xu Dong Gao Wei(Civil and Resource Engineering and Resource, University of Science and Technology Beijing, Beijing 100083, China)

机构地区：[1]北京科技大学土木与资源工程学院,北京100083

出　　处：《粉煤灰综合利用》2017年第1期29-32,38,共5页Fly Ash Comprehensive Utilization

基　　金：国务院其它部委资金支持研究项目:(编号201509049)

摘　　要：采用正交试验方法对低碱渣全固废碱渣混凝土的配合比进行研究,考察了碱渣、脱硫石膏和钢渣三个因素的掺量对混凝土抗压强度和坍落度的影响情况。结果表明影响混凝土整体性能因素的大小为;钢渣>脱硫石膏>碱渣。通过对试验结果的均值、极差分析,从而得出碱渣因素对混凝土性能影响最大,确定各因素的比例关系为碱渣:脱硫石膏:钢渣=1:2:5。对净浆试块进行微观分析,发现胶凝体系中生成的钙矾石和C-S-H凝胶是贡献混凝土强度的主要因素。In this paper, orthogonal test method was used to study the mix proportion of alkali slag solid waste concrete, and the effects of alkali slag, desulphurization gypsum and steel slag on the compressive strength and slump of concrete were investigated. The results show that the factors affecting the overall performance of concrete size is; steel slag〉 desulfurization gypsum〉 alkali sludge. Through the mean and range analysis of the test results, it is concluded that the alkali sludge has the greatest influence on the concrete performance, and the proportion of each factor is determined as alkali sludge： desulfurized gypsum： steel slag = 1： 2： 5. It is found that ettringite and C-S-H gels formed in the gelation system are the main factors contributing to the strength of the concrete.

关 键 词：碱渣 全固废混凝土 正交试验 抗压强度 坍落度 钙矾石 C-S-H凝胶 

分 类 号：TU528[建筑科学—建筑技术科学]