| 摘要 |
PURPOSE: Provided is a liquid mixture to repair and maintain the cracking of concrete construction by an injection method. The resultant liquid mixture has low viscosity and high affinity for cement, resulting in good application at work and durability. CONSTITUTION: The liquid to repair the cracking of concrete construction is prepared by adding acid or alkali catalyst to alkoxide solution, and mixing for 1-2hrs. The alkoxide is expressed M-(OR)n, wherein M is a metal such as Si, Al or Ti, R is an alkyl group such as methyl, ethyl or propyl, and n is an inter of 3-4. The acid is one or more of HCl, HNO3 and H3PO4, and the alkali is one or more NaOH, KOH and Ca(OH)2. The repairing agent is applied to the concrete construction by injection through a syringe or low pressure pump, wherein the concrete construction is wet with water or silicate solution spread before 2hrs. Water or silicate solution is also spread on the concrete coated with the repairing agent beyond 6hrs after coating. The used silicate solution(10-20%) contains silica and alkali(SiO2/Na2O) in a weight ratio of 3-4.
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