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我国南方雨量充沛,地下水位较高,室内混凝土地面返潮是常见的现象.我们曾对返潮的地面进行过处理,具体的做法是:将原混凝土地面打毛,用水冲洗干净,然后用107胶掺防水粉并与水泥和水调制成的稀浆在地面上薄刮一层(约2～3 mm厚),待稀浆硬化后,刷热沥青油二道,再在油层面上浇3 cm 厚的200号细石混凝土。采用这种方法对地面处理后,防潮效果良好.室内地面返潮与混凝土的质量有关,混凝土振捣不密实、拌合物过稀、水泥受潮和水泥用量不足,都会使混凝土内部形成大量的孔隙与毛细孔,地下水分就通过毛细孔与孔隙上渗到地面,使地面出现返潮现象。因此,我们在新建的建筑物中,对混凝土地坪采取了以下的预防措施:1.将室内地坪填高,使其高出室外地面30～
South China has abundant rainfall, high groundwater level, and indoor concrete floor return is a common phenomenon. We have treated the surface of the damp ground. The specific approach is: to roughen the original concrete floor, wash it with water, and then mix it with 107 glue. The waterproof slurry is mixed with cement and water to form a thin layer (approximately 2 to 3 mm thick) on the ground. After the slurry is hardened, the asphalt is hot brushed and then poured 3 cm thick on the oil level. No. 200 fine stone concrete. After this method is applied to the ground, the dampproof effect is good. The indoor floor dampening is related to the quality of the concrete. The vibrating concrete is not compacted, the mixture is too thin, the cement is damp, and the amount of cement is insufficient. Capillary pores, groundwater through the pores and pores seepage to the ground, so that the ground appears to dampen phenomenon. Therefore, in the newly-built buildings, we have taken the following precautionary measures for the concrete floor: 1. Fill up the indoor floor so that it is higher than the outdoor ground 30~