掺尾矿砂泡沫轻质土的制备及性能研究

Performance Research and Preparation of Foamed Light-weight Soil with Tailing Sand

泡沫轻质土可用于公路、基坑支护结构或墙后土体置换,以减少墙后主动土压力。研究了在水胶比和孔隙率不同的情况下,泡沫轻质土的干密度、孔隙率、尾料掺量与强度和导热系数等性能,研究了彼此之间的关系。水灰比>0.5时,强度随水灰比的降低而增大;水灰比<0.5时,随水粉比的减小而降低;导热系数、抗压强度均随孔隙率的增加和密度的降低而降低。

To reduce the active pressure,the foamed light-weight soil is used for the soil displacement in highway,foundation excavation supporting or wall. Respectively,this paper studied that disciplinarians of porosity,wet density,the quality of tailing,strength and the coefficient of thermal conductivity in different water-cement ratio and porosity. When water-cement is bigger than 0. 5,strength increased with decreasing water-cement ratio. When water-cement is smaller than 0. 5,strength decreased with decreasing water-cement ratio. Coefficient of thermal conductivity,compressive strength decreases with the increasing density and decrease porosity.