水泥土冻结温度及热物理参数试验研究

通过室内试验对冻结水泥土热物理参数进行了系列试验研究。结果表明:冻结水泥土随水泥掺入比的增加,冻结温度呈线性关系降低,且相同水泥掺入比情况下,粘土冻结温度比砂土的要低。两种水泥土在常温下导热系数和容积热容量随水泥掺入比的增大而减小,导温系数随水泥掺入比的增大而增大;在-10℃条件下导热系数、容积热容量和导温系数随水泥掺入比的增大而减小,但变化不明显。可为类似工程冻结设计提供冻结计算参数。

Test Research to Freezing Point and the Thermal Physical Parameters of Freezing Cement Soil

The thermal physical parameters of freezing cement soil have been studied.The results show that,with the cement content increases,the freezing point of cement soil reduces linearly,and the freezing point of clay is lower than sandy clay when they have the same cement content;In normal temperature,these two kinds of cement soil’s thermal conductivity and volumetric heat capacity reduce but thermal diffusivity increases with cement content increases;At-10 ℃,their thermal conductivity,volumetric heat capacity and thermal diffusivity reduce but not obviously.It can provide the freezing design parameters for similar engineering,by a series of laboratory experiments.