There are water droplets in the ceiling, then it should be poor waterproof performance of the ceiling, the ground moisture penetrates into the basement, and we live in it will be very uncomfortable, then how do we do a good waterproof basement? The waterproofing of the basement floor is as follows: point-bonded No. 350 petroleum asphalt felt layer protection, 2 thick polyurethane waterproof coating; underground outdoor wall construction waterproof is 2 thick polyurethane waterproof coating; outdoor part basement roof construction waterproof is 2 layers 3 thickness APP Modified Asphalt waterproofing membrane. The success of waterproofing is based on the compactness of impervious concrete, followed by the construction quality of the building's waterproof layer. First, the concrete waterproof 1, construction preparation (1) Completion of reticle inspection and pre-inspection work of steel bars and templates. Care should be taken to check whether the lead wire and bolts of the fixed form pass through the concrete wall. If necessary, waterproof measures should be taken. In particular, is the equipment piping or embedded parts well-waterproofed? The wooden formwork is moistened in advance and the debris falling into the mold is clean. (2) According to the construction plan, do a good job of technical disclosure. (3) Each raw material must be tested to match the concrete mix ratio. The test impermeability mark should be increased by 0.2MPa according to the design requirements. The amount of cement per cubic meter of concrete (including fines) shall be not less than 320kg. Sand content is 35%～40%, lime-sand ratio must be kept 1:2～1:2.5, water-cement ratio is not more than 0.6, slump is less than 5cm. If concrete is pumped, admixtures should be based on technical requirements. Decision. (4) During the construction of underground waterproofing works, precipitation drainage shall be continued. 2, operating process (1) Concrete mixing To ensure the quality of commercial concrete, the mixing must be strictly in accordance with the mixing ratio notice of the laboratory, and no modification is allowed. During the construction of the rainy season, the moisture content of sand and stone shall be measured daily in order to adjust the water consumption. The material is poured into the hopper in the order of stone, cement, and sand. Dry the mixture for 0.5 to 1 minutes before adding water. Stir 1 to 2 minutes after adding water. The slump is controlled between 3 and 5 cm, usually about 3 cm. (2) Concrete transportation After the concrete is discharged from the mixer, it is transported by the pump truck to the watering site in time. (3) Concrete watering The floor shall be continuously watered and no cold joints shall be left. When pouring the wall on the concrete floor, it is necessary to clean the surface, and then spread a layer of 2 to 5 cm thick cement mortar (that is, using the original concrete mix to remove stones) or the same mix of reduced stone concrete. The first step of pouring concrete height is 40cm, after each step of watering 50 ~ 60cm, according to the order of construction plans to water. In order to ensure that there is no segregation when the concrete is poured, the concrete should be allowed to fall freely from a height, and the drop distance should not exceed 2m. If the height exceeds 2m, it must fall along the string or chute. (4) The waterproof concrete shall be mechanically vibrated to ensure that the concrete is dense. General use plug-in, flat type Or attached vibrators. With a plug-in vibrator, the insertion should be rapid, pull out slowly, and vibrate until the surface panning without bubbles. The spacing between the insertion points should not be greater than 50cm to prevent leakage. The section of the structure is relatively small, and the densely packed parts are operated strictly according to the principle of layered watering and stratified vibrating. Vibrating and ashing should begin with a symmetrical position to prevent the template from moving around. When watering into the surface, the surface of the concrete must be leveled and pressed firmly and evenly. (5) Prepare compression and impermeability concrete blocks at the pouring sites. (6) Treatment of special parts: Waterproofing the pull bolts in the template: Underground wall through the wall bolts to consider the waterproof requirements, the use of water-resistant steel pull the screw. In order to avoid leaving traces on the wall when cutting the screw to affect the concrete effect and the construction of the waterproof coiled material, an 18-gauge Φ40 wedge-shaped cork is put on both ends of the screw during mold sealing. After the screw is cut off, a high-strength grade waterproof cement mortar is used to fill the pit. Four Axis Machining Service,Five Axis Machining,Four Axis Machining,Five Axis Machining Service Lizhi Precision Manufacturing Technology Co.,Ltd , https://www.autoindust.com
How to do a good waterproof job in the basement to face the rainy season