In this study, the physical triggered self-healing cementitious composites were prepared by mixing the epoxy resin based microcapsules with the cement, and its mechanical properties and microstructure were investigated as well. The effects of the different content of the microcapsules, proportion of prepressing stress, confining pressure and curing days on the mechanical parameters and microstructure of cementitious composite were carried out by the triaxial compression test and the mercury intrusion porosimetry (MIP) tests. The results indicated that the strength, cohesion, internal friction angle of specimens gradually decreased with an increase in microcapsules content or with an increasing of preloading stress, and the deterioration degree gradually increased with an increase in the microcapsule content or the preloading stress, but peak strain increased to vary degree. The mechanical parameters of the healed samples were repaired to different degrees compared with damaged samples. Microcapsules have significant and positive influences on the healing rates and recovery rates of mechanical properties, pore structure. The healing effect of cementitious materials was improved with increasing microcapsule content. However, the effects of microcapsules on microstructure of sound samples has to be considered.

在这项研究中，通过将环氧树脂基微胶囊与水泥混合制备了物理触发的自修复水泥基复合材料，并对其力学性能和微观结构进行了研究。通过三轴压缩试验和压汞法测试了微胶囊的不同含量，预压比例，围压和固化天数对胶凝复合材料力学参数和微观结构的影响。结果表明，随着微胶囊含量的增加或预压应力的增加，试样的强度，内聚力，内摩擦角逐渐减小；随着微胶囊含量或预压应力的增加，样品的强度，内聚角，劣化程度逐渐增大。但峰值应变有所不同。与损坏的样品相比，修复后的样品的机械参数得到了不同程度的修复。微胶囊对机械性能，孔结构的愈合速率和恢复速率具有显着且积极的影响。随着微胶囊含量的增加，胶凝材料的愈合效果得到改善。但是，必须考虑微胶囊对声音样品微观结构的影响。