Common knowledge of coating: common problems of basement waterproofing

Core tip: the basement waterproof design adheres to the principle of "multiple fortification, combination of rigid and flexible waterproof materials, comprehensive prevention and control" Combined with engineering examples, the paper discusses several problems and construction methods existing in practice, and introduces the construction methods of basement, such as external anti external sticking method, external anti internal sticking method and off wall lining waterproof method This paper summarizes the treatment of detailed structure of basement and construction precautions The 21st century is a century when human beings develop and utilize the underground space vigorously The waterproof technology of underground engineering has become a hot issue in academic and engineering circles A large number of engineering practices have proved that, Paint agent, top 10 Chinese wall paint brands Recommended introduction: interior wall paint and exterior wall paint can achieve beautiful, clean and pleasant effects, but the effects in different environments are different, so the color of the paint will be different There are ten brands of Chinese paint, ten brands of global paint, ten brands of Chinese wall paint, and ten brands of Chinese paint, Famous trademark of Chinese paint and coating In private rooms, most of us choose according to our own personality, personal hobbies and living habits The younger generation will choose the interior wall paint with rich colors and bright colors, while the older ones will have some working experience Paint Home News: basement waterproof design adhere to the principle of "multiple fortification, combination of rigid and flexible waterproof materials, comprehensive prevention and control" Combined with engineering examples, the paper discusses several problems and construction methods existing in practice, and introduces the construction methods of basement, such as external anti external sticking method, external anti internal sticking method and off wall lining waterproof method This paper summarizes the treatment of the detailed structure of the basement and the construction precautions The 21st century is a century when human beings develop and utilize the underground space vigorously The waterproof technology of underground engineering has become a hot issue in academic and engineering circles A large number of engineering practices have proved that the success or failure of an underground engineering project largely depends on the effect of groundwater treatment For example, due to the structural reasons, the structural layer is cracked, or due to the neglect of moisture-proof and waterproof work, the ground tide or groundwater will take the opportunity to enter In serious cases, the underground works cannot be used or even affect the durability of the building Therefore, at present, the waterproof level and use requirements of the basement are relatively high The waterproof level of civil buildings and public buildings underground engineering should meet the level I standard, that is, no water seepage is allowed, and the surface of the enclosure structure and the lining structure is free of moisture stains This paper discusses the waterproof problem of basement with engineering examples Because most of the projects are built in the city, the site is narrow, and the construction is difficult, so the engineering design and waterproof scheme should be considered in combination with the site environment and construction conditions Looking at the practice of underground building waterproofing at home and abroad for many years, in addition to the waterproof concrete mixed with admixture has been widely used in the enclosure structure, one or two kinds of waterproof materials, such as polymer modified asphalt waterproof roll, should be selected as the waterproof layer for the main body of the enclosure structure with waterproof grade I and II , JS composite waterproof coating, hydrophobic waterproof agent, elastomer joint and sealing materials (metal, rubber water stop belt, sealing paste), polyethylene polypropylene fiber, etc General design method: one is to continuously paste the modified asphalt waterproof coiled material on the surface of the main body of the enclosure along the floor to the external surface Before pasting, apply a 20mm thick 1:3 cement mortar leveling layer on the wall, apply a layer of cold primer oil, and then paste The Paste height shall be 0.5-1m higher than the water head For the waterproof treatment of the basement floor, the concrete cushion is poured on the soil layer as the bottom plate, with a thickness of about 100 mm The waterproof layer shall be spread over the whole basement, and then a 20mm thick cement mortar protective layer shall be plastered on the waterproof layer to facilitate the pouring of reinforced concrete Sufficient length must be reserved for the floor waterproof layer to overlap with the vertical waterproof layer of the wall, and the protection of the joint waterproof layer shall be well done The other is that the floor and wall of the basement are generally made of waterproof reinforced concrete A certain amount of admixtures, such as aluminum chloride, calcium chloride and iron oxide, are added into the concrete, which can react with the calcium hydroxide in the process of cement hydration to form water-insoluble colloids such as aluminum hydroxide and iron hydroxide, and synthesize complex salt crystals with the triple calcification of aluminosilicate in the cement These colloids and crystals are filled in the pores of the concrete, so as to improve the performance of the concrete Its compactness The aggregate with different particle size can also be used for grading, and the content of concrete mortar can be increased to make the mortar filled between the aggregates, so as to block the seepage channel due to the direct contact between the aggregates, so as to achieve the purpose of waterproof The concrete outer wall and foundation base plate should not be too thin Generally, the outer wall should be more than 200 mm and the base plate should be more than 150 mm thick In addition, cement mortar shall be applied on the outside of the wall, and then hot asphalt shall be applied Home of coatings is specialized in coatings, diatom mud, paint coating, coating technology, fire retardant coating news and coating, diatom mud, paint coating, coating technology, fire retardant coating decoration knowledge and decoration renderings,