The roof is the most imp費話ortant role of the housin區不g cover and load-bearing structure, one妹子 of its most important function is算報 "wind and rain". According to the體他 different slope商錯, the roof can be 兵現divided into flat roof and sl會亮oping roof. Generall頻是y flat roof slope in 10%, the most com近志monly used slope is 關姐2~3%, the slope of the slope r文票oof is more than 10%. In our cou慢公ntry, the slope roof is used 兵間in traditional buildings. T鐘鐵he slope of the roof is large, flexi短說ble, rapid drainage, waterpro慢的of effect is also good. Since 60s, 討門in order to redu服影ce the weight of t新白he roof, reduce project cost, 知地improve the roof of prefabricated, gene門媽rally for reinforced co雪制ncrete flat roof, the use of prefabr視懂icated hollow roof嗎愛 slab and the cast-in-place 員件reinforced concrete r視來oof slab. The f術用lat roof has the ad如你vantages of low co冷農st, convenient construc裡事tion, simple structure and simple 報錯appearance, and is suitable for va門明rious shapes and sizes.
Flat roof has the following 家聽structure:
1 multi-storey resi子黃dential buildings: generally 5~7 l妹拿ayer brick structure, prefabrica拍弟ted circular plate or cast in situ 少了flat roof, low cost, large volum購飛e wide.
2 high-rise buil校冷dings: mostly frame, frame sh嗎工ear wall, tube and other st書亮ructural forms, c還理ast-in-place roof p美分anels, roof area is relatively small b喝科ut large deformation, mainly for resid業黃ential, office buildings or comm快月ercial tourism facilities.
3 industrial plant: mostly single st話門ory industrial frame, fra商相me structure, l話少arge roof panels. Due to the la視員rge span of the roof and the inf謝如luence of external deformat事小ion.
4 large public buildings: large s醫鐵pan, large space, the s資農tructure and the form of complex, l員短arge deformation, such as train去生 stations, memorial hall, etc拿房.. Building roof, especially fo站報r the vast areas of northern China, ma學地inly to solve the problem of insu店公lation and waterproof, so the typica女多l structure of t錢美he roof is:
A. structure of the bas木雪ic level: mostly prefab看樂ricated circular plate o拿場r cast-in-place reinforced c友新oncrete roof bo兵體ard.
B. vapor barrier: in order to低妹 prevent moisture into 嗎區the insulation 輛坐layer and set, mostly秒內 a layer of cold base oil or 開高a layer of asphalt felt.
C. insulation layer: t著站here are two kinds of cast-in-place 區厭and precast assembly章畫, commonly used in thermal 白科insulation materials, cement perli林對te, coke residue, aerated concrete 麗會block, polystyrene f學大oam board, etc..
D. cement mortar 從內screed
E. waterproof layer: ca事在n be coiled material and coating of f船睡lexible waterproof layer, can als朋弟o be a rigid waterproof layer of fine s道請tone concrete with flex票間ible caulking composition.科這
F. protective layer: for t人歌he flexible roofing waterp器話roof layer, in order to prevent prema弟上ture aging, usually add a prot還有ective layer on the waterproof layer, u厭山sing mung bean sand, cement tiles, 費都brick, light colored coating or cast fi放路ne stone concrete.