论文部分内容阅读
近来,许多单位反映,自1958年后的油毡屋面防水质量普遍下降,使用年限缩短,渗漏现象严重,维修、返修困难已成为基建、维修部门的一个老大难问题。经全国五个大区调查,结果也是下降的(表1)。另外,在上海抽查了139个住宅工程的卷材屋面,有渗漏的占42％。1983年底在华北调查了约十万平方米新建房屋的屋面油毡防水工程,达到优良标准的只有8％,不合格的达39％之多,距国家规范和标准的要求差距较大。这些问题主要是漏、渗、裂、鼓、淌、老化、积水、粗糙等。漏渗是裂、鼓、老化
Recently, many organizations have reported that since 1958, the waterproof quality of linoleum roofs has generally declined, the useful life has been shortened, and the leakage phenomenon has become serious. The difficulties in maintenance and repair have become a chronic problem in the infrastructure and maintenance departments. The result of surveys in five regions across the country also declined (Table 1). In addition, 42% of the roofs of the 139 residential projects in Shanghai were leaked. At the end of 1983, it was investigated in North China about 100,000 square meters of newly-built houses for roof linoleum waterproofing projects. Only 8% of them reached excellent standards, and as many as 39% failed, which was a big gap between the requirements of national regulations and standards. These problems are mainly leakage, seepage, cracking, drums, blemishes, aging, water accumulation, and roughness. Leakage is cracking, drumming, aging