掺加粉煤灰的砂浆和混凝土抗压强度相关性研究

Correlation research between the mortar and concrete mixed with fly ash on Compressive Strength

为了解掺加粉煤灰的砂浆和混凝土抗压强度相关性,成型了不同粉煤灰掺量的砂浆和混凝土试样。在砂浆和混凝土试样标准养护到一定龄期后,基于《建筑砂浆基本性能试验方法标准》JGJ/T70—2009和《普通混凝土力学性能试验方法标准》GB/T50081—2002中方法进行抗压强度试验,发现:在标养不超过360 d、粉煤灰掺量0～40%范围内,粉煤灰掺量和龄期分别对砂浆和混凝土抗压强度的影响趋势基本一致,可以用成型砂浆试件代替混凝土试件,来找寻一定配比混凝土最大抗压强度所对应的粉煤灰掺量。

In order to get the correlation between the compressive strength of mortar and concrete mixed with fly ash, different samples with varied content of fly ash were prepared. After the mortar samples were cured for a certain age in a standard environment, based on the methods of ＂Standard Test Methods for Basic Performance of Building Mortars＂ JGJ/T70-2009 and ＂Standards for Test Methods for Mechanical Properties of Normal Concrete＂ GB/T50081-2002., the compressive strengthis tested. The results show the impact of fly ash content and age on the compressive strength of mortar and concrete were basically the same in the range of no more than 360 d for standard cultivation and 0 to 40% for fly ashcontent. It is a good way that concrete specimens were replaced with Mortar specimens to find the best fly ash content corresponding to the best compressive strength of concretewith limited ratio.