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季节性冻土在中国分布广泛,在强烈的冻融循环作用下,路基易出现翻浆冒泥、沉陷和强度弱化等现象。在路基土中掺入粉煤灰和水泥是一种有效的改良措施,为探讨冻融循环条件下水泥土和掺粉煤灰水泥土的强度特性,对水泥土进行冻融循环和无侧限抗压强度试验,研究了水泥掺量、粉煤灰掺量、龄期和冻融循环次数对水泥土无侧限抗压强度的影响。
Seasonal permafrost is widely distributed in China. Under the action of intense freeze-thaw cycles, the phenomenon of sludging, slump and strength weakening appears in the roadbed. In the subgrade soil incorporation of fly ash and cement is an effective improvement measures, in order to explore the freeze-thaw cycle cement soil and fly ash mixed with soil strength characteristics of cement soil freezing and thawing cycles and unconfined The compressive strength test was conducted to study the influence of cement content, fly ash content, age and freeze-thaw cycles on the unconfined compressive strength of cemented soil.