硅酸盐通报2024，Vol.43Issue(10)：3666-3676,11.
聚乙烯醇纤维沙漠砂混凝土配合比试验研究
Experimental Study on Mix Proportion of Polyvinyl Alcohol Fiber Reinforced Desert Sand Concrete
摘要
Abstract
In order to give full play to the particle filling advantage of desert sand and improve the mechanical properties of desert sand concrete,this paper carried out an experimental study on the mix proportion design method of polyvinyl alcohol fiber reinforced desert sand concrete based on Dinger-Funk close-packing theory.Firstly,applying the Dinger-Funk close-packing theory,the optimized sand rate is 42％,the optimized desert sand mass replacement ratio is 10％,20％and 30％,the concrete aggregate particle gradation is improved,the fineness modulus of mixed fine aggregate is reduced from 3.27 to 2.92,2.81 and 2.71,and the effective porosity is reduced from 2.50％to 1.65％,1.45％and 1.51％,respectively.Secondly,the orthogonal test method was used to study the effects of water-cement ratio,desert sand mass replacement ratio,and the volume dosage of polyvinyl alcohol fiber on the workability,compressive strength,splitting tensile strength and flexural strength of concrete.The results show that,with the increase of desert sand mass replacement ratio and fiber dosage,the workability of concrete firstly increase and then decrease,and the compressive strength,splitting tensile strength and flexural strength show the trend of firstly increasing and then decreasing.Considering the test results of the workability and mechanical properties,the optimal mix proportion of C30 polyvinyl alcohol fiber reinforced desert sand concrete is determined to be 0.45 water-cement ratio,20％of desert sand mass replacement ratio,and 0.10％of polyvinyl alcohol fiber volume dosage.关键词
聚乙烯醇纤维/沙漠砂混凝土/配合比设计/Dinger-Funk紧密堆积理论/正交试验Key words
polyvinyl alcohol fiber/desert sand concrete/mix proportion design/Dinger-Funk close-packing theory/orthogonal test分类
建筑与水利引用本文复制引用
周丽娜,吉富娜,李学志,潘文贵,马财龙..聚乙烯醇纤维沙漠砂混凝土配合比试验研究[J].硅酸盐通报,2024,43(10):3666-3676,11.基金项目
国家自然科学基金(52368040) （52368040）
新疆维吾尔自治区高层次人才引进项目(TCBR202107) （TCBR202107）
新疆维吾尔自治区科技计划重点研发专项(2022B03034-2) （2022B03034-2）
