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JGJ 52-2006《普通混凝土用砂、石质量及检验方法》标准中,在砂石碱活性的评定中采用符合当时的国家标准GB 175-1999《硅酸盐水泥、普通硅酸盐水泥》要求的普通硅酸盐水泥。但之后的GB 175-2007《通用硅酸盐水泥》中关于普通硅酸盐水泥的混合材掺量改为>5%且≤20%,上限提高了。为了JGJ 52中碱活性试验方法的有效和结果的再现性,采用不同混合材料水泥对高活性的板岩的膨胀性进行测试。结果表明:混合材料的品种和掺量对碱活性的判定结果影响很大,不宜采用普通硅酸盐水泥作为评定骨料碱活性用水泥。
JGJ 52-2006 Standard for Sand and Stone Quality and Test Method for Ordinary Concrete, the requirements of the national standard GB 175-1999 “Portland cement and ordinary portland cement” are adopted in the evaluation of the grit alkalinity. Ordinary Portland cement. However, the subsequent GB 175-2007 “Universal Portland Cement” Portland cement mixed with the amount of mixed material to> 5% and ≤ 20%, the ceiling increased. For efficient and reproducible results of the JGJ 52 alkaline activity test method, the swelling properties of highly active slate were tested using different mixed-material cements. The results showed that the varieties and contents of the mixed materials had a great influence on the determination of alkali activity. Ordinary Portland cement should not be used as the cement for evaluating the alkali activity of aggregate.