一、前言 长期来人们在房屋建筑防水层上习惯采用三油二毡的做法,这种做法存在着容易起鼓、老化、流淌等缺点。这种防水层一旦渗漏之后维修困难,需要大面积揭开,通常七、八年就需全面翻修。其中最令人烦恼的是熬煮沥青,不但操作麻烦,而且有害工人健康,污染环境。近年来我们采用防水性能较好的氯丁防水涂料代替沥青粘贴油毡的防水做法,在针织三厂等工程屋面上使用,经过三年多的实践考验,效果良好,我们正在继续推广使用。 I. INTRODUCTION For a long time people used to use the three oils and two felts on the waterproof layer of building construction. This practice has the disadvantages of easy drumming, aging and run-off. Once this type of waterproof layer is difficult to maintain after seepage, it needs to be uncovered in large areas, and it is usually necessary to completely renovate it in seven or eight years. One of the most troubling is the cooking of bitumen, which is not only troublesome but also harmful to the health of workers and polluting the environment. In recent years, we have adopted a neoprene water-repellent coating with better waterproof performance instead of asphalt-bonded linoleum for waterproofing. We have used it in engineering roofs such as the Knitting Third Factory. After more than three years of practical tests, the results are good and we are continuing to promote the use.