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为了研究硅酸盐水泥改性泥岩的受压破坏过程,利用普通硅酸盐水泥对重塑泥岩试件进行改性处理,通过变形场测试系统观测了改性前后泥岩在单轴压缩过程中变形场的演化过程。研究结果表明:改性后重塑试件,载荷较小时,试件表面发生应力集中;载荷增加,局部变形区的面积增加,并且相邻的局部变形区相互合并形成应变局部化带;加载曲线上载荷接近峰值时,应变局部化带演变成宏观裂纹;随后,宏观裂纹扩展导致试样发生破坏;含水量为30%的泥岩,改性前发生剪胀破坏,以5%硅酸盐水泥改性后发生劈裂破坏。
In order to study the compressive failure process of Portland cement modified mudstone, the modified Portland cement was used to modify the specimen of modified mudstone. The deformation field test system was used to observe the deformation of mudstone during uniaxial compression The evolution of the field. The results show that when the specimen is remodeled and reformed, the stress concentration occurs on the surface of the specimen when the load is small; the load increases and the area of the local deformation area increases, and the adjacent local deformation zones merge with each other to form the strain localization zone; When the load is close to the peak, the strain localization zone evolves into macroscopic cracks. Subsequently, the macroscopic crack propagation leads to the destruction of the specimen. The mudstone with 30% water content is dilapidated and destroyed before the modification, After the occurrence of cleavage damage.