SBR modified asphalt bridge deck waterproofing coating

SBR modified asphalt bridge deck waterproofing coating is a styrene-based materials, together with a variety of rubber modified bitumen compound with water as a medium, the preparation of an aqueous waterproof coating. The product is non-toxic, tasteless, no pollution, cold construction; main advantage is the rubber modified asphalt to form a continuous network and interpenetrating, crosslinked polymer exhibits properties of the modified; dry after coating, keeping rubber elasticity, low temperature flexibility; shear and strong, able to withstand long-term load and compression deck requirement to prevent structural damage caused by water leakage, slow road bridge life. Is the most ideal bridge waterproof material, can be used for roofing, underground, tunnel, cave and other water projects, seepage, corrosion, waterproof wall. SBR modified asphalt bridge deck waterproofing paint not only has good water resistance, and road and bridge surface layer can absorb the stress and noise, as a stress-absorbing layer; because of their degree of elasticity and plastic deformation, can carry the load without being destroyed . Bridge surface alleviate aging, anti-life. Pre-construction preparation (a) Before waterproof bonding layer construction, requirements of concrete bridge decks do smooth, dry, clean, no floating pulp, no oil, no protruding steel and other hard objects, processing methods are: 1, raised, 2, depression, for cracks class, you should first V-hewn, remove debris; milling or grinding machine is available with chisel hammer leveling; projections of steel cut to the roots, rust after treatment ends with an epoxy resin filled with the same grade cement mortar; recessed area for a larger and more gentle place to chisel a shallow trench to landscape the low side, to facilitate drainage; 3, laitance loose, peeling, etc. can be washed in clear planing machine; 4, oil composition, Available soda decompose the bird or oxygen flame gun fire, is not complete until no traces of oil should be chiseled; control deck flatness of less than 5 mm, it should be smooth and rough rather than smooth so that the waterproof adhesive layer and cement enough friction between the concrete form, resist interlaminar shear caused by heavy vehicles braking force. Approach slab false seam in strict accordance with drawings rubber asphalt pad NOTE joint compound. Finally, before the construction of waterproof bonding layer to completely remove the bridge and take the board dust, stone chips, sand and other residue, steel brush, high pressure water jets to clean, no water until the deck, waterproof adhesive dried layer construction. (B) construction preparation 1, SBR waterproof adhesive layer using self-propelled asphalt distributor, mainly insulation asphalt tank, heating system, transmission, circulation sprinkler systems, steering mechanism and inspection, measuring instruments and other components. Spraying is controlled by controlling the amount of spreaders spraying nozzle width, nozzle height, speed, pump output and other operating parameters to achieve, before the formal construction, must first be tested spill, determine the amount of spraying asphalt distributor Working relationship between parameters. 2, spreaders carry out the necessary inspection and maintenance, such as checking oil adequacy instrument is normal, pipe and fittings for leaks, various manipulation device is flexible. 3, before the paint loading, cleared spreaders: Thoroughly clean the original asphalt car tank, cleaning the car chassis, removing dirt debris, remove all piping original asphalt binder. 4, or asphalt in the asphalt pump inlet aperture is provided on board plus 3 mm ~ 5 mm mesh to prevent debris entering the pool asphalt spreaders, to prevent clogging of the nozzle, resulting in the bridge can not be evenly spraying. (C) Spray claim 1, SBR waterproof coating is heated in the mixing station should be heated to 185 ℃, spreaders bitumen heating system heat insulation, guarantee asphalt distributor over 180 ℃. 2, asphalt distributor asphalt spraying should remain stable speed and spray amount, and keep the entire width of the spray evenly spraying, spraying device nozzle attention should be applied to the asphalt consistency, to ensure a mist, and sprinkle the tubing into a 15 ° ~ height 25 ° angle, sprinkle tubing should make the same spot for two to three spray nozzles spray the asphalt, with no gray left blank on the edge and other local not spilled into parts, should be applied to the modified artificial fill asphalt thickness reaches maximal thickness. 3, both ends of the deck with kraft paper or color of the cloth or felt, oil will start and end boundary bedding neat to asphalt distributor when starting and stopping sprinkle spray without the normal state in advance to pave the way out of the asphalt fell on good kraft paper and can be kept clean throughout the site. 4, SBR waterproof adhesive layer thickness requirements, spreaders should be considered when setting quality spraying and spraying asphalt density loss. 5, spraying quality, mainly through spraying and spraying volume uniformity measure, spraying is mainly determined by observation uniformity, spread quantities converted by spraying the material density is determined thickness. Spray SBR waterproof bonding layer twice: the first layer of coating to be dried and then a second time spray. (Iv) completion of construction of the bridge traffic control SBR waterproof adhesive layer in front of the asphalt concrete surface construction traffic control to ban heavy duty vehicular traffic, other vehicles restricted access, control speed below 5 km / h, the brakes may not or turn around, in order to avoid destruction, while making dust pollution prevention measures; and on which one shall be arbitrarily stacked items, to prevent produce vandalism. When the formal construction of asphalt concrete surface layer, but also pay attention to not damage the truck and paver SBR waterproof adhesive layer. Note SBR modified asphalt bridge deck waterproofing coating: Material construction temperature above 5 ℃. Shall stir paint before use. Rain not construction, not more than five wind construction. Above 0 ℃ storage, transportation, avoid exposure, storage period of six months.