| 摘要 |
PURPOSE: A waterproof cement and a waterproof process using the cement are provided, for improving the waterproofness and simplifying the construction process. CONSTITUTION: A waterproof cement comprises Portland cement and mineral materials comprising SiO2, Al2O3, Fe2O3 and CaO. The Portland cement and the mineral materials are mixed preferably in a ratio of 3: 1-7: 1, and more preferably 5.5: 1. Preferably the content of CaO contained in the mineral materials is lower than that of CaO contained in a general cement, and the content of SiO2, Al2O3 and SO3 contained in the mineral materials is higher than that of SiO2, Al2O3 and SO3 contained in a general cement. The cement comprises 35-45 percent by weight of SiO2, 15-20 percent by weight of Al2O3, 13-20 percent by weight of CaO and 10-15 percent by weight of SO3. The waterproof process comprises the steps of: mixing Portland cement and the mineral materials to obtain a mixture; adding sand to the mixture; adding water to the mixture and mixing for about 6-8 min; coating onto the object; curing for 24-60 hours, preferably 50 hours; and curing for 7-11 days in humid condition.
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