塑料薄膜,从六十年代已开始在市政工程中应用。主要应用于混凝土路面的养生,起到了节约用水、文明施工的良好作用。在雨污水管道中,由于混凝土量小,水化热低,尤其对于水泥砂浆抹面、管口抹带等较小的部位,能否应用还未尝试过。八一年我队承担的南旱河雨污水管道工程,管线比较长,(污水D=1600毫米、L= Plastic films have been used in municipal engineering since the 1960s. Mainly used in the health of concrete pavement, has played a good role in saving water and civilized construction. In rain sewers, due to the small amount of concrete and the low heat of hydration, it has not been attempted to apply even the smaller parts such as cement mortar trowel and pipe mouth wipe. In the rain-fed sewer project of the South Drought River that was undertaken by our team in August of 2013, the pipeline was relatively long (sewage D=1,600mm, L=