C70高性能混凝土的正交试验设计与制备  

Orthogonal Design and Preparation of C70 High Performance Concrete

作　　者：何毅 李晨瑶 甯佳明 董欣 王君[2] HE Yi;LI Chen-yao;NING Jia-ming;DONG Xin;WANG Jun(Guangdong Gezhouba Zhaoming Expressway Co Ltd,Zhaoqing 526070,China;State Key Laboratory for Silicate Building Materials,Wuhan University of Technology,Wuhan 430070,China)

机构地区：[1]广东葛洲坝肇明高速公路有限公司,肇庆526070 [2]武汉理工大学硅酸盐建筑材料国家重点实验室,武汉430070

出　　处：《武汉理工大学学报》2023年第9期42-47,共6页Journal of Wuhan University of Technology

基　　金：肇明高速早强抗裂机制砂高性能混凝土的研究与应用(ZMGS-HT-2021-27)。

摘　　要：固定复合掺合料比例:石粉∶钢渣粉∶矿渣粉=10%∶20%∶70%,采用正交设计方法考察了水胶比、砂率、胶凝材料总量以及掺合料掺量对C70高性能混凝土7d和28 d抗压强度与劈裂抗拉强度的影响,并对试验结果进行了直观分析、方差分析和因素指标分析。结果表明:水胶比是影响混凝土抗压强度和劈裂抗拉强度的“显著”性影响因素;并得到优化后推荐的C70高性能混凝土配合比;与普通混凝土相比,其28 d水化程度高,浆体结构更密实。The ratio of fixed composite admixtures:stone powder∶steel slag powder∶slag powder=10%∶20%∶70%.The orthogonal design method was used to investigate the effects of water cement ratio,sand ratio,total amount of cementitious materials,and the amount of admixtures on the compressive strength and splitting tensile strength of C70 high-performance concrete at 7 and 28 days.The test results were visually analyzed,analyzed for variance,and analyzed for factor indicators.The results indicate that the water cement ratio is a significant influencing factor on the compressive strength and splitting tensile strength of concrete;And obtain the optimized recommended mix ratio of C70 high-performance concrete;Compared with ordinary concrete,its 28 d hydration degree is higher and the slurry structure is more dense.

关 键 词：掺合料 混凝土 力学性能 正交设计 

分 类 号：TU528.58[建筑科学—建筑技术科学]