4. C «ng t ¸ c chèng more4.1. Preparing the surface waterproof-Clean, opaque Hash classes in outdoor concrete cement, excess mortar for inert structural concrete surface with hand tools: hammer, chisel, chisel hammer hash curly ...-Concrete surface texture, check out and carve the mouth open wide slotted rift 1-2 cm, 2 cm deep, ice bags, purse-like niches, holes pitting ... will be opaque quit the adhesion section contingency, carve broad and deep to dense concrete.-Around the mouth of the drainage holes regularly perforated concrete floor grooves 3 cm deep, 2-3 cm wide, to be able to get more waterproofing, installation of water-stop products thanh Truong bloom (Subodh Zhang) and reinforced by mortar pouring compensate not shrinkage.-The entire Grinding surface need waterproof processing by grinding mounted brushes brushes to make iron sprung exfoliates off impurities, dirt remains to have the surface clean, definitely for the penetrant waterproofing solution.-Cleaning clean the dirt on the entire surface should handle waterproofing with brooms, sweeping brush or air blowing or industrial vacuum cleaners.4.2. process of waterproofing-Processing of reinforced waterproofing for the empty holes, crevices, holes, puffiness niches beard ... on the concrete floor by Sika Sika/Latex Latex oil lakes TH and mortar pouring clearing no shrinkage.-Handle wrap gum Cheung (Cheung Shui Bar) in the slots of the scale, then poured floor penetration tube stock clearing the mortar does not co.After the concrete is dry, remove the hard rock mi formwork we conduct waterproofing that paste, spray or quyét according to the following specific procedures Scan Urethane waterproofing and Sikatop Seal 107Step 1: draw the water and wall corner: bo-Before construction of the scanning products (components of the cement stem or root bu believe) how we should draw water to avoid water came through concrete waterproofing status will not seep into the concrete hull then create links (to Avoid condensation of water on the surface of the concrete)-Foot concrete wall corner Bo golden sand + Sika latex latex/TH-Scanning of thin layer of waterproof glue and glass grid bo corner with wide concrete lattice from 10-15 cm.Step 2: waterproofing:-Depending on each type of product we should execute 2 or 3 layers to ensure the sealed surface coating waterproofing needs.-Construction of the waterproofing layer angles vertically from top to bottom, after class after class before the scanned surface dry (about 2-24 h, depending on the outdoor temperature as well as customized product type used).-The average thickness of each layer is 1 mm. The dosage used for each class is 1-2 kg (depending on the level of need and prescribed seepage countering of each type of product to be used), so the complete dose is 2-6 kg/m2-Should divide the amount into several smaller containers to mix materials for many construction applications at the same time.Step 3: the points that need attention:-With the original product should cement need good maintenance requirements to ensure the material is the most security and made a good adhesive to the surface need waterproof as well as create the dense membrane.-Should not mix in too much material at the same time to avoid the execution not up-When the paint surface finishing coating should add layers of protection mortar (cement + sand) onto the surface of the waterproofing layer.
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