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直立锁边:怎样完善金属彩钢板屋面防水方案呢?

返回列表 来源: 发布日期: 2020.10.20

直立锁边:怎样完善金属彩钢板屋面防水方案呢?

长期以来,我国厂房维修费用一直占据着工厂成本的很大一部分。其主要原因是金属彩钢板屋面的防水问题被认为是一个简单的问题,也是唯一的问题。一些重要因素被忽视,导致“抓眉毛胡子”。但最终,该车间仍存在漏水、生锈等质量通病。那么,如何改进金属屋面的防水方案呢?

1、 密封材料维护
在对金属彩钢板屋面进行防水养护时,发现使用传统钢结构防水材料往往需要修补。比如卷材容易开裂。我们沿着裂缝两侧切割30-50mm,露出找平层;用无齿锯切割裂缝,宽度为20-40mm,深度为槽宽的50-70%。金属彩钢板屋面除去板缝及两侧的杂质后,在基层上涂处理剂,设置背衬材料,并在接缝处嵌入密封材料,金属彩钢板屋面同时将两侧卷材粘在一起。需要注意的是,卷材嵌入接缝两侧的宽度不应小于30mm,表面应弯曲。
2、 线圈维护
将裂缝两侧300mm宽的面层清理干净,接缝处用涂料或密封膏填塞,接缝上粘贴的一侧点宽度不小于100mm;卷材隔离层用宽度大于300mm的卷材覆盖与原防水层的有效粘结宽度不应小于100mm;搭接处应四周用密封膏密封压实,宽度不应小于10mm。
3、 防水涂料
金属彩钢板屋面 原卷材老化后拆除的部分,应先拆除并清理干净,露出基层,在裂缝处填塞涂料或密封膏,养护后再铺设两层基体增强材料涂料防水层,其厚度不应小于3mm。增强材料可以是缝纫涤纶布,与无纺布有本质区别,无纺布的纤维没有方向性,不透水。用无纺布作为防水层的增强材料所形成的防水层是分层的,涂层不能很好地浸渍无纺布,使用寿命很短。涤纶针织物的经纱方向有增强线,纤维按尺寸方向成股排列,具有优良的力学性能。

For a long time, the maintenance cost of factory buildings in China has occupied a large part of the cost of factories. The main reason is that the waterproof of metal roof is treated as a simple problem and the only problem. Some important factors are ignored, which leads to "grasping the eyebrows and whiskers". However, in the end, the workshop still suffers from common quality problems such as water leakage and rust. So, how to improve the waterproof scheme of metal roof?

1、 Sealing material maintenance
When doing waterproof maintenance for metal roof, we found that the use of conventional steel structure waterproof materials often needs repair. For example, the coiled material is easy to crack. We cut 30-50 mm along both sides of the crack to expose the leveling layer; use a toothless saw to cut the crack with a width of 20-40mm and a depth of 50-70% of the width of the slot. After removing the impurities on the plate joint and both sides, the base course is coated with treatment agent, and the backing material is set, and the sealing material is embedded in the joint, and the coiled material on both sides is glued at the same time. It should be noted that the width of the coiled material embedded in the joint on both sides should not be less than 30mm, and the surface should be curved.
2、 Coil maintenance
The surface course with width of 300 mm on both sides of the crack shall be cleaned, and the joint shall be filled with coating or sealing paste, and the width of one side point sticking on the joint shall not be less than 100 mm; the coiled material isolation layer layer shall be covered with coiled material with a width of more than 300 mm, and the effective bonding width with the original waterproof layer shall not be less than 100 mm; the lap joint shall be sealed and compacted with sealing paste around, and the width shall not be less than 10 mm.
3、 Waterproof coating
The part removed from the aging of the original coil needs to be removed and cleaned first, the base course is exposed, the coating or sealing paste is filled in the crack place, and then two layers of coating waterproof layer with matrix reinforcement material are laid after curing, the thickness of which should not be less than 3mm. The reinforced material can be sewing polyester cloth, which is essentially different from non-woven fabric, and the fiber of non-woven fabric has no directionality And it is impermeable. The waterproof layer formed by using non-woven fabric as the reinforcing material of waterproof layer is delamination, and the coating can not impregnate the non-woven fabric well, so the service life is very short. The warp direction of stitched polyester fabric has reinforcement line, and the fibers are arranged in strands according to dimensional direction, so it has excellent mechanical properties.

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