据笔者了解,我国内尚无膨润土体系防水材料。现根据广告资料将美国这类防水材料介绍如下,供从事建筑防水材料的科研、生产、使用部门的同志参考。美国粘土公司在怀俄明州及南达柯塔州设有开矿场和工厂,出产高含钠量膨润土,因为所产的矿产是由火山喷发的岩浆风化形成,然后再经加工提炼,所以命名为火山唛膨润土, According to the author’s understanding, there is no bentonite system waterproof material in China. According to the advertising materials, this type of waterproof material in the United States is introduced as follows, for reference by comrades engaged in the research, production, and use of building waterproof materials. U.S. Clay Company has a mine and factory in Wyoming and South Dakota, producing high-sodium bentonite, because the produced minerals are formed by the weathering of volcanic eruptions and then processed and refined, so they are named volcanoes. Bentonite,