一、防水材料中延伸率性能的定义和作用 随着防水技术的发展,防水材料中延伸率性能越来越被重视。各种高延伸率的新型防水材料亦不断的涌现,延伸率从传统的纸胎沥青油毡的1％～3％发展到高聚物改性沥青防水卷材的10％～200％,一直发展到合成高分子防水材料的300％甚至500％。可以说,新型防水材料的发展过程也是材料延伸率不断提高的过程。显然,防水材料的延伸率性能在防水工程中的作用是极其重要的。 First, the definition and role of elongation properties in waterproof materials With the development of waterproof technology, the elongation properties of waterproof materials are increasingly valued. A variety of new high-elongation waterproof materials have also emerged, and the elongation rate has increased from 1% to 3% of the conventional felted bitumen felt to 10% to 200% of the polymer modified bituminous waterproofing material. 300% or even 500% of synthetic polymer waterproof material. It can be said that the development of new types of waterproof materials is also a process in which the material elongation rate is continuously increasing. Obviously, the effect of the elongation property of the waterproof material in the waterproofing project is extremely important.