The invention relates to a swelling type micro-
capsule /
cement-based self-repair
system.
Calcium alginate is used as
capsule walls,
epoxy resin is used as
capsule cores, accordingly, swelling type micro-capsules can be prepared, and the particle sizes of the micro-capsules range from 300 micrometers to 2.5 mm; basic components in a self-repair
cement-based materials include
cement, sand, the micro-capsules, water and
epoxy resin curing agents, and the adding quantity of the micro-capsules is 0.5-10 wt% of the cement. The cement, the sand and the micro-capsules are uniformly stirred and dispersed, the water and the
epoxy resin curing agents are poured into mixtures with the cement, the sand and the micro-capsules, and pouring forming, form stripping and curing are carried out after the water, the epoxy resin curing agents and the mixtures are uniformly stirred, so that the swelling type micro-capsule / cement-based self-repair
system can be formed. The swelling type micro-capsule / cement-based self-repair
system has the advantages that the micro-capsules have water absorption and swelling characteristics, accordingly, water can be compensated in cement hydration procedures, and the swelling type micro-capsule / cement-based self-repair system has an internal curing function; processes for synthesizing the swelling type micro-capsule / cement-based self-repair system are simple, the swelling type micro-capsule / cement-based self-repair system is good in
mechanical property, is difficult to break in cement mixture stirring procedures and can be uniformly dispersed in the cement-based materials, and accordingly cracks can be self-repaired.