This article presents the experimental results on accelerated carbonation‐induced corrosion and related durability properties such as AC impendence, half‐cell potential, water permeability, and volume of permeable voids test of concrete made with high‐volume Class F fly ash (FA). Concrete specimens were prepared by substituting ordinary portland cement with FA at varying replacement levels (0–70%). High‐volume FA concrete shows the continuous gain in the compressive strength and ultrasonic pulse velocity over a period of 365 days. The durability properties of concrete made with FA up to 50% shows the significant improvement. The scanning electron microscopy photomicrographs also support the findings and shows that the replacement of cement with FA densifies the concrete matrix due to the formation of more calcium silicate hydrate gels.

中文翻译：

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大量粉煤灰混凝土的机械和耐久性研究

本文介绍了加速碳化引起的腐蚀以及相关耐久性特性的实验结果，例如交流阻抗，半电池电势，水渗透性以及用大体积F级粉煤灰（FA）制成的混凝土的可渗透空隙体积测试。通过用不同替代水平（0-70％）的FA代替普通硅酸盐水泥来制备混凝土标本。高体积FA混凝土在365天的时间内显示出抗压强度和超声脉冲速度的连续增加。FA含量高达50％的混凝土的耐久性能显示出显着的改善。扫描电子显微镜显微照片也支持了这一发现，并显示由于用更多的硅酸钙水合物凝胶形成，用FA代替水泥致密了混凝土基质。