Abstract: The fly-ash added in concrete is an effective measure to improve the concrete property, but it can make the early mechanical properties of the concrete descented. The tensile characteristics of the fly-ash concrete are studied through tests. The acting mechanism of fly-ash in concrete is analyzed in this paper. The method of blending admixtures in fly-ash concrete can improve its early mechanical characteristics. The experiment indicates that its action is obvious.

摘要： 在混凝土中掺粉煤灰是改善混凝土性能的有效措施，但掺粉煤灰将使混凝土的早期力学性能下降。本文通过试验，重点对掺粉煤灰混凝土的拉伸性能进行研究，分析了粉煤灰在混凝土中的作用机理，采用复合掺外加剂的方法改善粉煤灰混凝土早期力学性能，试验表明其作用是明显的。