粉煤灰水泥土抗压强度影响因素试验研究

Factors Influencing the Compressive Strength of Fly Ash-Cement Mixed Soils

为了研究不同条件对粉煤灰水泥土抗压强度造成的影响,对不同配合比、不同养护龄期以及不同养护环境的试样进行了无侧限抗压强度试验以及微观电镜扫描。试验结果表明:材料配合比、龄期及养护环境对于粉煤灰水泥土的抗压强度影响均十分明显。在相同养护龄期及环境条件下,配合比中水泥占固化剂总质量的比例越高,粉煤灰水泥土的抗压强度越高;在相同配合比及养护环境条件下,试样的抗压强度随着养护龄期的增长而增大;而在相同配合比及养护龄期条件下,养护环境中湿度因素对试样抗压强度产生决定性影响,湿度越低,试样抗压强度越高,湿度越高,则抗压强度越低,而其主要与试样中土的含水率有关。

In order to study the influence of different conditions on the compressive strength of fly ash-cement mixed soils, the unconfined compressive strength as well as electronic microscope scanning tests on mixed soil samples with different mixing ratios curing ages and curing environments were carried out. The test results show that the mixing ratio, curing age and environment all have the obvious influence on the compressive strength of the mixed soil samples. Under the same curing age and environment, the higher cement content in soils, the higher the compressive strength of the mixed soils. Under the same mixing ratio and curing environment, the compressive strength of the soil sample increases with the growth of curing age. Under the same mixing ratio and curing age, humidity has a decisive influence on the compressive strength of the tested samples, the lower the humidity, the higher the compressive strength of the soils samples, the higher the humidity, the lower the compressive strength, which is mainly related to the moisture content of soil samples.