摘要
随着天然砂的日益短缺,机制砂已成为建设用砂的重要来源,针对机制砂中石粉含量,目前各国标准最高限值存在较大差异。通过研究石粉含量对C30、C60、C80混凝土工作性、强度、抗渗性能的影响,得出了不同强度机制砂混凝土石粉含量最佳值,试验表明：低强混凝土的最佳石粉含量介于10%~15%之间,高强混凝土的最佳石粉含量介于7%~10%之间,而超高强机制砂混凝土的最佳石粉含量介于3%~5%之间。
With the growing shortage of natural sand, manufactured-sand become an important source of sand.According to the top limited content of micro-fines in manufactured-sand, there are great differences in the standard of every country.The effects of the different content mi- cro-fines in manufactured-sand on the compressive strength, working performance,impermeability in different strength grade concrete are re- searched.The result shows that：Optimum content of micro-fines of low-strength concrete is within 10%-15%, optimum content of micro-fines of high-strength concrete is within 10%-15%, and optimum content of micro-fines of super high-strength concrete is within 3%-5%.
出处
《混凝土》
CAS
CSCD
北大核心
2009年第3期35-37,共3页
Concrete
关键词
机制砂
石粉
抗渗性能
manufactured-sand
micro-fines
impermeability
