防水材料的選用.doc
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防水材料的選用
選用防水材料是防水設計的重要一環，具有決定性的意義�，F在材料品種繁多、形態不一，性能各異，價格高低懸殊；施工方式各具不同。因此要求選定的材料必須適應工程要求：工程地質水文，結構類型，施工季節，當地氣候，建筑使用功能以及特殊部位等，對防水材料都有具體要求。
一、 氣候條件選材
1、我國地域遼闊，南北氣溫高低懸殊，江南地區夏季氣溫達四十余度，持續數日，暴露在屋面的防水層，長時間的暴曬，過早地推動防水功能。選用的材料應是耐紫外線強的，軟化點高的，如APP改性瀝青卷材、三元乙丙橡膠卷材、聚氯乙烯卷材。
2、南方多雨，北方多雪，西部干旱。年降雨量在1000mm以上的約有15個省市自治區，陰雨連綿的日子的二百天，屋面始
Selection of waterproof material
Use waterproof materials waterproof design an important part of decisive significance. Now a wide variety of materials, different forms, performance varied, the price disparity between high and low; construction with a different way. So that the selected material must meet the engineering requirements: engineering geology, hydrology, structure type, construction season, local climate, building functions, and special parts, etc., have specific requirements on the waterproof material.
I. Selection of climatic conditions
1, China's vast, high and low temperature disparity between north and south, south in summer temperature of more than forty degrees for several days, exposed roof waterproofing layer, long exposure, prematurely promote water resistance. The material used should be strong resistance to UV, high softening point, such as the APP modified bitumen roll roofing, EPDM, PVC membrane.
2, South rainy, snowy north, the western dry. More than 1000mm annual rainfall in some 15 provinces, rainy days of 200 days, before the roof