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在给排水、循环水及污水处理等工程的池、井、沟、槽等防水混凝土施工中,除应遵守一般钢筋混凝土工程的施工规范外,还要充分认识防水工程的特殊性,以确保防水混凝土的质量。 1.选择好的施工季节混凝土防水工程不宜在冬季施工。如果非施工不可,一般要搭暖棚;也不宜在夏季高温天气施工,气温高于32℃时,须有遮阳降温措施。 2.对原材料的要求水泥:一般应采用425号以上的普通硅酸盐水泥。不得用小窑生产的水泥,过期水泥不得降标号使用。骨料:粗骨料宜采用质地坚硬的碎石或
In the construction of water-repellent concrete such as pools, wells, trenches, and troughs such as water supply and drainage, circulating water, and sewage treatment, in addition to observing the construction specifications of general reinforced concrete works, we must fully understand the special features of the waterproof engineering to ensure waterproofness. The quality of the concrete. 1. Select a good construction season concrete waterproofing works should not be in the winter construction. If non-construction is not available, it is generally advised to take a warm shed; it is also not suitable for construction in hot summer weather. When the temperature is higher than 32°C, measures must be taken to cool the sun. 2. Requirements for Raw Materials Cement: Ordinary Portland cement, number 425 or higher, should generally be used. It is not allowed to use the cement produced in small kiln. The expired cement must not be used for labeling. Aggregate: Crude aggregate should be made of hard rock or