聚乙烯醇—水泥自硬砂是一种把有机粘结剂(聚乙烯醇)和无机粘结剂(水泥)混合应用的自硬砂。近年来,上海机械制造工艺研究所、南京曙光机械厂、南京工学院等单位曾对这种自硬砂进行了初步试验,取得一定成效,并对这种自硬砂形成的机理进行了初步探讨。试验内容包括聚乙烯醇溶液浓度、气温对聚乙烯醇—水泥自硬砂自硬速度和强度的影响;原砂、 Polyvinyl alcohol - cement Self-hardening sand is a self-hardening sand mixed with organic binder (polyvinyl alcohol) and inorganic binder (cement). In recent years, Shanghai Machinery Manufacturing Technology Institute, Nanjing Shuguang Machinery Factory, Nanjing Institute of Technology and other units of this kind of hard sand has been the initial test, and achieved some results, and the mechanism of the formation of this hard sand preliminary study . The test includes the concentration of polyvinyl alcohol solution, the temperature on the polyvinyl alcohol-cement self-hardening sand hardness and strength of the impact of the original sand,