关键词: 自修复;微胶囊;裂缝修复

Abstract: In order to solve concrete cracking and improve the service life of buildings and durable performance.As used herein,we used urea-formaldehyde resin as microcapsule wall, epoxy resin E-44 asmicrocapsules capsule core, we take in-situ synthesized method advid two step to synthesismicrocapsules.This experiment explored by controlling the balance of the mass ratio between the wall and the core keep up with 3:10,the molar ratio of urea and formaldehyde is 4:1,temperature 85℃,stirring time was 3 h and someoters factors,to preparation a structure compact intact microcapsules. double mixed with a curing agent and microcapsules prepared different microcapsules dosage self-repairing mortar content,to explore the dosage of curing agent and microcapsule's impact on self-repair mortar strength,and applying a pre-pressure to self-repairingmortar in different proportions and control with the blank to explore factors of self-repairingmortar content strength and repair rate.The results show that when the microcapsule content is 6%,pre-pressure is 50% self-repairing mortar had highest repair rate.

Key words: self-repairing;microcapsule;crack repaire