1. Construction tools: gasoline blowtorch (3.5 liters), pulley, brush, press, scissors, tape measure, broom, etc.
Second, the base treatment: the base is a cement mortar leveling layer, which must be solid and flat, and there can be no looseness, bulging, uneven surface and roughness, otherwise it must be treated.
Third, the base must be dry, and the moisture content should be within 9%. During the test, the coiled material is laid on the surface of the base, and after 3-5 hours, if there is basically no water drop on the lower surface, the construction can be started.
Four, before construction, carefully clean up the cement mortar residue, dust and sundries on the surface of the grass-roots unit, and then paint the bottom oil, requiring uniform painting and drying for more than 8 hours at a time (depending on the temperature, it is advisable not to stick feet).
5. Treatment of complex parts: the corner of yin and yang is made into a figure of eight, and the corner parts such as parapet, pipe root, chimney, exhaust hole, downpipe and expansion joint are made into additional layers. , generally 30cm wide, overlapping 6-8cm.
Six, coil paving: before paving the coil, measure the waterproof area to be constructed, and then use the material reasonably according to the size of the material. Starting from the lowest point, put the coil in a suitable position, leaving 8cm for the long side and 10cm for the short side. Then ignite the blowtorch, aim at the bottom of the coil and the base surface, and heat evenly (the blowtorch nozzle is about 30cm away from the coil surface). Immediately after the surface of the coil melts, roll the coil forward and compact and flatten the coil. The summer-planting part should be extruded with molten asphalt. Don't get involved in air and foreign matter when rolling to prevent deflection, bulging and wrinkling. Finally, seal the joint evenly and carefully with a blowtorch and a press to prevent the edge from warping.
Seven. Labor protection and safety protection: during transportation and construction, the coiled material should be prevented from being scratched and punctured by hard objects, and it is forbidden to trample it at will after construction, and the use protection work should be done well. Wear gloves during construction to avoid burns and scalds, and store flammable items such as gasoline cans and coiled materials separately, away from fire sources, to prevent fire and industrial accidents.
Construction scheme of sbs waterproofing membrane (2)
I. Overview of the Project:
1, project name: Xuzhou Construction Engineering Trading Center
2. Project Location: Xincheng District, Xuzhou City
3. Engineering material: SBS modified asphalt waterproofing membrane (3.0mm)
Second, the construction preparation
1, material
SBS waterproofing membrane, base oil, gasoline and SBS waterproofing membrane must have factory certificate when entering the site, and can only be used after passing the second interview.
2. Tools
Gasoline blowtorch, tape measure, art knife, roller brush, spray gun, broom, etc.
3, waterproof base application of cement mortar leveling, Yin and Yang Angle into an arc, its radius r is greater than or equal to 150 mm leveling layer to keep dry, its moisture content is not greater than 9%, the surface should be solid, no sand, no pits. When the leveling layer cracks, when the crack width is less than 0.5 mm, the sealing material should be painted; When it is greater than 0.5 mm, it should be chiseled along the seam and embedded with dense materials.
Third, the construction deployment
1, engineering quality: excellent
2. Organization: In order to ensure the realization of the objectives of site management, quality, safety and civilized construction, our company appointed Gong Baojun team to be responsible for the construction of this project.
3. Labor force plan: waterproof construction of foundation slab and permanent protective wall, with skilled workers 10-20 people.
Four, the main construction methods:
According to the characteristics of this project and the site conditions, the sticking process is constructed by hot melt method.
1, process
Surface cleaning at the grass-roots level → cold priming oil brushing → additional layer treatment →SBS modified asphalt waterproofing membrane paving → inspection and acceptance → protective layer construction.
Grass-roots cleaning: thoroughly clean the impurities and dust on the grass-roots surface and brush the cold primer.
Brush cold priming oil: evenly brush a layer of cold priming oil on the surface of cement mortar. Small areas or details can be brushed with a brush dipped in oil, and the brushing should be uniform and consistent, and there should be no white or bottoming. Dry for 2-4 hours.
Additional layer treatment: all the corners of yin and yang are covered with an additional layer of coiled material. Laying method is to cut the coiled material into 500mm width, and the lap width is 150mm. If you paste two layers, you can omit them.
2. Coil pasting: cut the modified asphalt waterproof coil according to the paving length and roll it for later use. Take the plane (horizontal leveling elevation) 600mm away from the side wall as the starting point of the coil lap, the lap width of the long side of the flat facade coil is 100mm, and the lap width of the short side is150 mm. When pasting, use a gasoline blowtorch to make the coil form a 60-degree angle with the base surface of the adhesive towel, and bake it evenly back and forth. The heating time of the coil is not easy to be too long or too short, and it is best to just bake asphalt oil. The two ends of the hand-held coil are slowly rolled forward, which requires uniform force, no air pockets, and the width of the blank holder should be well controlled. The upper and lower layers of coiled materials are staggered by 1/3 width.
3. Coil joint treatment: whether the coil is vertical or horizontal, (1) the overlapping width of its long side and short side should be not less than 100mm and 150mm, and the overlapping parts of the coil should be heated by a blowtorch and sealed evenly and carefully with a trowel.
4, parapet coil paste: parapet coil paste: laying facade, bottom-up coil, in order to facilitate operation, the coil length is cut into about 2m, when the shop is stuck, the lower section of the coil is first glued by hot melt method, and then a person moves from the lower part of the coil with a blowtorch, and forcibly flattens and compacts it up and left and right sides, with the extruded asphalt oil as the best, and the height is not less than 600 mm from the plane.
Before the parapet is waterproof, the concrete wall should be removed first, and the concrete bumps such as slurry running at the rubbing place should be removed. The screw head of the wall should be cut into a "concave" shape, and the notch should be smoothed with waterproof mortar. The whole wall should be leveled with cement mortar and dried until the moisture content is less than 9%, then the waterproof coiled material can be pasted.
5. Paving at the casing of the pipeline out of the roof: If there is a flange, a coiled material should be pasted on the flange with a pasting width of not less than 100 mm, and the corrosion and sundries on the casing should be removed before paving. If the casing has no flange, an extra layer of rings and strips should be added.
Five, waterproof engineering quality requirements
1. The waterproof layer shall be firmly bonded without damage, warping, opening and folding.
2, coil and coil pick-up error is not more than 65438+/-00 mm. ..
3, coil lap seam, convergent closed must be tight, firm, no defects such as stratification.
4, waterproof layer without leakage phenomenon.
Six, the construction matters needing attention
1, strictly abide by all kinds of safety and civilized construction rules and regulations on the site of the general contractor;
2, the construction personnel must wear labor protection articles in accordance with the provisions, before entering the work area, in accordance with the provisions, shall not be illegal operation;
3. Smoking and fire are strictly prohibited on site;
4. Waterproof materials should be managed by designated personnel, distributed by classification, and kept at a safe distance, especially materials that are volatile, flammable and have diluents (such as gasoline and xylene);
5, pay attention to the protection of finished products, shall not be carved holes on the waterproof layer, shall not wear spikes on the waterproof layer.