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在混凝土衬砌渠道防渗中,伸缩缝填缝止水材料的好坏,是直接影响防渗效果和衬砌板裂缝破坏的重要因素。填缝止水材料以往多采用沥青砂浆(现场浇灌或予制)或油毡涂沥青(一毡二油或二毡三油)等。这些材料来源容易,造价较低;但因其在低温下变形性能差,与混凝土缝面的粘结能力低等缺点,经过冬季的考验,不能适应混凝土的收缩变形,绝大多数与混凝土缝面脱离,形成渗水通路,不仅降低了防渗效果,而且提高了地基土的湿度,加
In concrete lining canal seepage control, the expansion joint sealant sealing material is good or bad, is an important factor that directly affects the seepage prevention effect and the cracking of the lining board. Sealant sealing materials used in the past to use asphalt mortar (on-site irrigation or pre-made) or asphalt felt coated (a felt two or three felt two oil) and so on. These materials are easy to source and have low cost. However, due to their poor deformation performance at low temperature and low bonding ability with concrete seams, after winter test, they can not meet the shrinkage and deformation of concrete. Off, the formation of water seepage channel, not only reduces the seepage effect, but also to improve the soil moisture, plus