论文部分内容阅读
选取质量分数分别为3%、5%、7%、9%的水泥,掺入到风化集料中,标准条件下养护7 d后,将冻融试验箱的温度调节在-15~15℃范围,分别进行1、3、5、7、9次冻融循环,并在应变式直剪仪上进行直接剪切试验,得到了不同掺量的水泥稳定三峡库区风化集料内摩擦角和粘聚力经过不同次数的冻融循环作用后的变化规律。采用库仑理论计算出不同上覆荷载作用下,水泥稳定风化集料的抗剪强度变化规律,以期为三峡库区风化集料用作道路基层提供理论依据和试验指导。
Select the mass fraction of 3%, 5%, 7%, 9% of the cement, were weathered into the aggregate, the standard conditions for 7 days after curing, the temperature of the freeze-thaw chamber was adjusted at -15 ~ 15 ℃ range , Respectively, 1, 3, 5, 7 and 9 cycles of freezing and thawing were carried out. The direct shearing test was conducted on the strain-gauge direct shear instrument. The internal friction angles and viscosities of weathered aggregates with different content of cement stabilized in the Three Gorges Reservoir Area Cohesion through different times after the freeze-thaw cycle changes. Coulomb theory was used to calculate the shear strength variation of the stabilized aggregate with different overburden loads in order to provide theoretical basis and experimental guidance for the weathered aggregate in the Three Gorges Reservoir area to be used as the roadbed.