一、明矾石膨胀剂混凝土防水屋面发展情况我省屋面防水材料多年来基本上采用沥青、油毡。目前,这些材料存在着质量低、耐久性差、供应紧张、施工周期长等问题,往往造成卷材防水屋面的渗漏。由于防水耐久性差还给国家增加大量维修费用。 First, the development of the waterproof concrete roof of the Mingyu stone swelling agent The province’s roofing waterproofing material basically used asphalt and linoleum for many years. At present, these materials have problems such as low quality, poor durability, tight supply, and long construction period, which often cause leakage of the coil waterproof roof. Due to the poor waterproof durability, the country also added a lot of maintenance costs.