光滑的混凝土表面作水泥砂浆面层,是建筑工人最头痛的事。一般先用火碱洗去混凝土表面的油渍,凿毛,撒水湿润,用素水泥浆加4～5％的107胶做结合层,再抹水泥砂浆。该作法工序复杂,劳动强度大,还极易造成空鼓、开裂等质量问题。北京市城建二公司在首体速滑馆工程施工中,采用陕西泾原建材厂生产的 DZM-19型胶粉作为粘接材料,提高了工 Smooth concrete surface as cement mortar surface is the biggest headache for construction workers. Generally, first use fire caustic soda to wash away the concrete surface oil, cut the hair, sprinkle water wet, add 4 to 5% of 107 glue to mix layer with cement paste, and then wipe the cement mortar. This method has complicated processes, labor intensity, and can easily cause hollowing, cracking and other quality problems. In the construction of the first body speed skating museum, the Beijing Urban Construction No. 2 Company adopted the DZM-19 type rubber powder produced by Shaanxi Ebara Building Materials Factory as a bonding material, and improved the work.