The hygroscopic properties of nine kinds of graded soil materials under different temperature and humidity conditions are studied by saturated salt solution method.The results show that when the ambient temperature is between 10℃ and 30℃,the equilibrium hygroscopicity of soil materials increases first and then decreases with the increase of temperature,and the hygroscopicity reaches the maximum in the range of 20℃ and 25℃.In low temperature environment,the effect of lower pairs on the moisture absorption of soil materials is relatively small,and the moisture absorption rate is relatively slow.When the ratio of soil-sand-stone is 28:67:6,the hygroscopic performance of the soil material is relatively poor(the minimum equilibrium moisture content is about 2.66％),while the ratio of soil-sand-stone is 45:13:42,the hygroscopic performance of the soil material is relatively good(the maximum equilibrium moisture content 3.95％).The small particle size and high component content of the soil material show better hygroscopic performance.In addition,data fitting method is used to analyze the prediction models of different hygrometric properties,and finally the influence of temperature factor on the predicted value is corrected,and the correlation coefficient between the correction coefficient and temperature is in line with the quadratic function α=-0.0656t2+0.4185t+0.3033,and the correlation coefficient is as high as 0.935 4.The above conclusions provide a scientific and convenient method for the quantitative calculation of soil material balancing environmental temperature and humidity performance.
NETL
NSTL
万方数据
