| 摘要 |
The Specification described a process for the treatment of hardened concrete which comprises applying to the surface of the concrete, or compressing into the concrete, an aqueous solution containing:a) a polymerisable component comprising at least one hydroxyalkyl acrylate or methacrylate, the alkyl group of which contains 1 to 4 carbon atoms, the said polymerisable component being present in an amount of 5 to 50% by weight of the said solution;b) a water-soluble compound of a polyvalent metal capable of forming a chelate with the polymer formed from the monomer (s) of component a) and;c) a polymerisation accelerator comprising a soluble redox system. After application of the solution to the concrete, the polymerisable component polymerises on or near the surface of the concrete to form a water-repellent film which prevents or reduces the penetration of water into the concrete. |
