超细粉煤灰制备C70机制砂高强混凝土的试验研究

摘要

通过对超细粉煤灰掺量、水胶比、集料和胶凝材料体系等配合比参数进行设计和分析，利用超细粉煤灰制备出 C70机制砂高强混凝土，解决了机制砂高强混凝土拌合物黏度大的问题，并对混凝土耐久性能和收缩性能进行了评价。结果表明，该混凝土具有良好的工作性能、力学性能和耐久性能。%C70 manufactured sand high strength concrete was prepared by using ultra-fine fly ash, based on design and analysis of the mix proportion parameters of the ultra-fine fly ash content, water to binder ratio, aggregates and cmentitious materials. The problem of high viscosity of manufactured sand high strength concrete resolved. The performances of durability and shrinkage of concrete were evaluated. The results showed that the concrete had good workability,mechanical and durability properties.