石屑粉煤灰改良膨胀土的胀缩和强度特性

Expansion shrinkage and strength characteristics of expansive soil improved by fly ash

在建筑物地基及公路路基修建过程中,膨胀土因膨胀特性对其易产生严重的危害,为探讨石屑粉煤灰对膨胀土的胀缩与强度性能的改良效果,在膨胀土中掺加不同品质及不同比例的粉煤灰,通过对膨胀土膨胀性能的抑制效果及强度的改良效果试验,研究石屑粉煤灰品质及掺量对膨胀土胀缩及强度的影响,试验结果表明:掺入石屑粉煤灰能有效抑制膨胀土的膨胀特性,且品质较好的粉煤灰效果更明显。掺加粉煤灰可有效抑制膨胀土膨胀特性,保障建筑物地基及公路路基的稳定性。

In the process of building foundation and highway subgrade construction,due to the expansion of the expansive soils is easy to produce serious harm,to study the expansion of stone dust fly ash on expansive soil shrinkage and strength performance improvement effect,in expansive soil mixed with different quality and different proportions of fly ash,through inhibiting effect on the properties of expansive soil expansion and strength of test,the stone chips quality and dosage of fly ash on expansive soil swell-shrink and intensity,the influence of the test results show that the incorporation of stone chips can effectively restrain the expansion of the expansive soil properties of fly ash,and good quality of fly ash effect more apparent The addition of fly ash can effectively restrain the expansion characteristics of expansive soil and guarantee the stability of building foundation and highway subgrade.