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新拌混凝土水灰比测定方法

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Abstract:

水灰比是决定混凝土品质和耐久性的一个重要参数,因此准确测定新拌混凝土的水灰比对工程实际有着极其重大的意义。本文总结并讨论了文献中报道的新拌混凝土水灰比测定方法。其中微波法是目前为止最简单实用的方法之一,然而其只能测定新拌物中的含水量,需结合其它测定水泥含量的方法才能确定水灰比。电阻率法精度高,但需预先建立水灰比与电阻率之间的关系曲线。其它方法或精度不足,或缺乏现场操作性,从而没有得到广泛的认可。本文对新拌混凝土中水泥含量的测定方法也进行了回顾及讨论。

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