| 摘要 |
A self repairing concrete containing microcapsules of polyurethane, which can repair micro cracks in the concrete, comprises, in mass ratio: concrete/microcapsules/water = 100:1-15:15-50. A method of making the same includes: weighing enough water, adding microcapsules of polyurethane into water and stirring until the microcapsules disperse sufficiently; adding the mixture into a mixing vessel, adding cement in corresponding mass into the vessel; stirring; adding filler materials including sands, stones etc.; casting in the field with 1/3 of the total mass each time; vibrating and expelling the air therein until mould fills with slurry. The microcapsules release epoxy resin during their brokenness, then the latter has chemical reaction with solidifying agent in micro cracks to repair defective structure. Thus the invention reaches the result of self diagnosing and repairing micro cracks in concrete, preventing their spread, maintaining mechanical configuration of buildings. It has great economic value and environmental value. |
