Effect of microcapsule layout on crack repair

2nd International Conference on Frontiers of Materials Synthesis and Processing

Fu, Mingming^1 ; Wang, Ting^1

Binzhou University, Chemical Engineering and Safety Department, Shandong, Binzhou

256600, China^1

关键词: compressive performanc;    Compressive tests;    Layout methods;    Microcapsules;    Residual strength;    similar simulation;    Similarity principle;    Uni-axial compression tests;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/493/1/012088/pdf
DOI  :  10.1088/1757-899X/493/1/012088

来源: IOP

【 摘 要 】

Similar rock specimens without microcapsules were prepared on the basis of similarity principle, and uniaxial compression tests were carried out to obtain the general law of rock fracture propagation. Microcapsules were mixed into rock specimens in three ways. The first way is uniform mixing. The second method is to add microcapsules at different levels. The third way is to add microcapsules along the crack propagation angle. The uniaxial preloading tests were carried out to obtain the compressive strength of the microcapsules. After the curing of 7d and 14d, three specimens were subjected to compressive test again and the strength recovery rate was calculated. Draw the following conclusions: After pre-compression repair, the compressive strength increases, indicating that microcapsules play a repair role; adding microcapsules along the average angle of crack propagation is the best way to repair the crack; the stress-strain curves show good elastic-plastic, the pressure relief curve is stable, and the residual strength is stable.