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根据试验结果的综合分析,作者认为,掺粉煤灰通常会导致混凝土的碱度和抗碳化能力的降低,降低程度主要取决于粉煤灰掺量、品质和采用的水泥品种以及养护龄期等因素。根据混凝土使用条件的不同及对混凝土耐久性要求的不同,人们可以通过控制粉煤灰掺量、选择恰当的配合比或掺外加剂等措施,使粉煤灰混凝土对钢筋的保护性能不低于基准混凝土。
According to the comprehensive analysis of the test results, the authors believe that fly ash will usually lead to a decrease in the alkalinity and anti-carbonation ability of the concrete. The degree of reduction depends mainly on the amount of fly ash, the quality, the type of cement used, and the age of curing. factor. According to the different conditions of concrete use and the different requirements for concrete durability, people can control the fly ash concrete by adding iron ore, selecting the right mix ratio, or adding additives, so that the protection performance of fly ash concrete to steel bars is not lower than Benchmark concrete.