屋顶（Roof）.docVIP

屋顶（Roof） (1) waterproof treatment. 1, roofing practices Fine stone concrete and admixture (such as filling agent, waterproofing agent, expansive agent, etc.) is a non isolation layer approach, namely in the reinforced concrete roof panel directly pouring fine stone concrete of 35mm ~ 40mm thick, can with bidirectional 200mm * 202mm steel mesh; another is the isolation layer practice at the grassroots level and the waterproof layer protection, avoid the effect of deformation on the roof waterproof layer. Sand, clay, mortar, waste oil or cement, paper bags, films and other insulation layer. Requirements for rigid waterproof roofing: 1) material requirements: fine stone concrete should be no less than C2 0, should use ordinary portland cement, its label is not less than C40, cement dosage should be not less than 320kg/m3, water to cement ratio of 0.5 to 0.55 is appropriate. With washed hard crushed stone or gravel, its particle size is 5mm ~ 13mm. The particle size of sand is 0.3mm to 0.5mm. Contains no more than 3% sludge. 2) structural requirements: supporting structure of rigid waterproof roof, integrity should be good, to prevent excessive deformation of the roof panel, roof panel selection should be based on the stiffness of the plate as the main basis, considering the construction load. 3) construction requirements: construction quality assurance, local edge angle construction to be in place. In order to make the roof panel and waterproof layer more closely combined, the roof board should be watered, wet, and brush water cement ratio of 0.6 of the pure water mud, vertical and horizontal together. After pouring concrete, application of heavy 30kg ~ 50kg rolling stone, and rolling back and forth, until the press like cement like galling, then the smooth, smooth surface, when the surface of the waterproof layer can move without leaving footprints, coverage and watering for seven days. The width of the roof panel shall be uniform, the width of the upper opening shall