连续级配废石胶结充填体强度及变形特性试验研究
发布时间：2019-06-03 03:30
【摘要】：采用MTS815岩石力学试验系统与自制的胶结充填体制作装置,对骨架颗粒满足Talbol级配理论的废石胶结充填体进行单轴抗压试验研究,分析了Talbol幂指数、初始孔隙度、胶结材料种类及含量对充填体强度及变形特性的影响规律。结果表明:充填体单轴抗压强度、弹性模量、变形模量均随Talbol指数n呈先增大、后减小的趋势;采用2次多项式拟合充填体单轴抗压强度与骨架颗粒Talbol指数的关系,得到了使充填体强度及变形特性达到最优的Talbol指数n=0.45。充填体单轴抗压强度基本上随其初始孔隙度的增大而减小,但当孔隙分布均匀性较差时,其试验结果具有一定差异。满足Talbol分布的充填体强度随其胶结材料胶结性能的提高而逐渐增大,其中水泥胶结充填体单轴抗压强度可以达到黏土胶结充填体的6倍以上。另外,胶结材料含量的提高同样可以增大充填体的强度,并能够相应地缩短其应力-应变曲线中的孔隙压密阶段。
[Abstract]:Using MTS815 rock mechanics test system and self-made cement filling system as equipment, the uniaxial compression test of waste stone cement filling body whose skeleton particles meet Talbol gradation theory is carried out, and the Talbol power index and initial porosity are analyzed. Effect of type and content of cementitious materials on strength and deformation characteristics of fillers. The results show that the uniaxial compressive strength, elastic modulus and deformation modulus of the filling body increase at first and then decrease with the Talbol index n. The relationship between uniaxial compressive strength and Talbol index of skeleton particles is fitted by quadratic multivariate fitting, and the Talbol index n 鈮，
本文编号：2491631
[Abstract]:Using MTS815 rock mechanics test system and self-made cement filling system as equipment, the uniaxial compression test of waste stone cement filling body whose skeleton particles meet Talbol gradation theory is carried out, and the Talbol power index and initial porosity are analyzed. Effect of type and content of cementitious materials on strength and deformation characteristics of fillers. The results show that the uniaxial compressive strength, elastic modulus and deformation modulus of the filling body increase at first and then decrease with the Talbol index n. The relationship between uniaxial compressive strength and Talbol index of skeleton particles is fitted by quadratic multivariate fitting, and the Talbol index n 鈮，
本文编号：2491631
本文链接：https://www.wllwen.com/kejilunwen/kuangye/2491631.html
