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聚氯乙烯胶泥是以煤焦油为主要成份,外加一定量聚氯乙烯树脂、增塑剂、稳定剂和填充料等辅助材料加热熬制而成的防水接缝材料,外观为黑色橡胶状物质。具有良好的弹塑性、可延性、大气稳定性、耐水性及化学稳定性。同时对混凝土、木材均有较好的粘结性能。它在水利水电工程中已较多的用于输水建筑物,诸如渡槽、渠道的接缝材料,均已获得良好的效果。但作为坝面伸缩缝止水嵌缝材料还未见有大面积施工应用实例。浙江省水科所曾承担某援外引水工程预制钢筋混凝土渠道接缝防渗材料试验任务,对聚氯乙烯胶泥进行了材料性能和浇灌工艺试验,并就模拟混凝土裂缝用胶泥嵌缝进行抗渗强度试验。各项试验表明,聚氯乙烯胶泥不但具有上述良好的性能,同时还具有良好的抗渗性能。为此,它将试用于永加县西章水库大坝钢丝网水泥沙浆防渗面板伸缩缝的防渗处理,总嵌缝长度达300余米,至今已蓄水投入运行。经检查,目前情况良好,取得了较好的技术经济效果。现将施工应用情况简述如下,以供参考。
Polyvinyl chloride cement is coal tar as the main ingredient, plus a certain amount of polyvinyl chloride resin, plasticizers, stabilizers and fillers and other auxiliary materials boiled made of waterproof seams material, the appearance of black rubbery material. Has good elasticity, ductility, atmospheric stability, water resistance and chemical stability. At the same time, concrete, wood have better bonding properties. It has been more used in water conservancy and hydropower projects for water conveyance, such as aqueduct, channel seams, have achieved good results. However, as a dam expansion joint sealing material has not yet seen a large area of construction application examples. Zhejiang Institute of Water Resources has undertaken a foreign aid project prefabricated reinforced concrete channel seams impervious material testing tasks, the material properties of PVC mortar and watering process tests, and simulated concrete crack mortar caulking impermeability test. Various tests show that PVC cement not only has the above good performance, but also has good impermeability. To this end, it will try Yongjian County West dam dam steel mesh impervious panel expansion joints seepage control joints, the total caulking length of 300 meters, has been put into operation. After examination, the current situation is good, and achieved good technical and economic results. Now the application of construction is briefly described below, for reference.