Abstract: In view of the complex service environment of damaged concrete in northwest China, the orthogonal test scheme of repair concrete was designed by using replacements rate of silica powder, sodium silicate, UEA expansion agent and amount of basalt fiber as main factors. Based on the performance of concrete, including mechanical property, volume stability and workability, twelve test indexes, i.e., compressive strength at 3, 7 and 28 d, expansion rate at 1, 3, 7, 14, 28, 45, 60 and 90 d and slump determined in order of importance, were introduced. For the test results, the model of maximizing deviation and grey correlation was established to evaluate the mix ratio of repair concrete. By using it, a mix ratio X4 of repair concrete was optimized, which had good slump, high strength in early stage and good strength development in later stage. In addition, this comprehensive evaluation model can scientifically and reasonably reflect the subjective opinion of the evaluator on the importance of the indexes and the objectivity of the actual test results. It can be used for the comprehensive evaluation and the optimization of concrete proportion under the condition of multi-factor and multi-dynamic index.
通讯作者: *杨淑雁,宁夏大学土木与水利工程学院副教授、硕士研究生导师。2008年武汉理工大学材料学专业硕士毕业,2014年上海交通大学结构工程专业博士毕业,同年到宁夏大学工作至今。2019—2020年赴美国俄亥俄州立大学土木与环境工程学院访学一年半。目前主要从事钢筋混凝土结构耐久性方面的研究工作,重点是硫酸盐、氯盐以及冻融循环对钢筋混凝土结构造成的病害。发表论文20余篇,包括Construction and Building Materials、Journal of Structural Engineering、Materials and Structures、Journal of Shanghai Jiaotong University、《建筑材料学报》等。
引用本文:
杨淑雁, 徐盼盼, 宋俊杰, 陈小龙. 基于离差最大化-灰色关联的修补混凝土配合比评价[J]. 材料导报, 2024, 38(6): 22040151-7.
YANG Shuyan, XU Panpan, SONG Junjie, CHEN Xiaolong. Evaluation on Proportion of Repair Concrete Based on Maximum Deviation and Grey Correlation. Materials Reports, 2024, 38(6): 22040151-7.
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2024, Vol. 38 
