水泥加固类路面基层填料的浸水强度

The Flooding Strength of Cement Reinforced Pavement Base Filler

在浸水条件下,对不同水泥占比和不同养生时间的加固土进行单轴抗压强度试验,试验结果表明:低液限黏土经固化剂加固后的最佳的含水率灵敏度比原土样有所减小,且随着水泥占比的增加而下降;养生时间一定的情况下,加固土的抗压强度随着水泥占比的增加而增大,水泥占比的增加对后期强度的影响较前期强度更显著;抗压强度随着养生时间增加而增大,随着时间的延长增长速率逐渐减小,28 d时水泥的水化反应基本完成;随着水泥占比的增加,各龄期下耐水系数均增大,表明加固土的水稳定性增强,但各种条件下耐水系数均小于0.75。

Uniaxial compressive strength tests were carried out for reinforced soils with different cement ratios and different curing times under the condition of immersion.The test results show that the optimum moisture content sensitivity is lower than that of the original soil sample,and decreases with the increase of the proportion of cement.The compressive strength of reinforced soil increases with the increase of the proportion of cement.The increase of the proportion of cement has more significant influence on the strength in later stage.With the increase of curing time the compressive strength increases and the growth rate gradually slows down.The hydration reaction of cement basically completes at 28 d.The water resistance coefficient increases at each age with the increase of the proportion of cement,indicating that the water stability of the reinforced soil is enhanced,but the water resistance coefficient under various conditions is less than 0.75.