Construction Equipment

    Subject to enter the construction site when the paint should be strictly in accordance with the construction specifications check mark, model, name, color, batch number, production date, quantity and production certification, etc., and to indicate the kinds of paint (including uses, such as primer, paint, paint), to ensure compliance with construction specifications.
    Meanwhile, the paint into the construction site, the construction schedule in batches into the inventory should be, and should be stored in the painting area 50m outside the outer security coffers. In addition, the use of paint should be commensurate with the longest shelf life, extended not be used.
    2.1.4 Construction Equipment
    Construction equipment including air compressors, sandblasting machine, spraying machine, fan, heating machine, etc., and construction equipment in place should be prepared before use, installation and commissioning work to ensure their safe operation.
    2.2 Construction blasting
    (1) Blasting shall, before the steel box girder polished surface treatment, such as the acute angle of the surface of the steel edges, corners, etc. polished into R ≥ 2.00mm above the arc, and remove the steel slag, pinholes, burr. In polished before doing ventilation, dehumidification and dust and other measures, and then use pneumatic grinder for grinding.
    (2) construction blasting, due to the unique characteristics of the blasting machine and steel corrosion requirements, etc., should be used for angular grit abrasive and grit size should G14 ~ G18, the particle diameter is preferably 1.0mm ~ 1.7mm, hardness HRC40 ~ HRC50, and shall no oil, dust and damp without caking, no soluble salts.
    (3) construction blasting process parameters: sandblasting gun nozzle air pressure ≥ 0.7MPa; blast from 100mm ~ 300mm; blasting angle 60o ~ 70o; sandblasting nozzle diameter 8mm ~ 10mm.
    (4) blasting operations, the jet surface should be evenly; sandblasting the surface should be no oil, no rust, no corrosion, oxide, no paint, etc.; sandblasting steel base surface should be a solid color, roughness should reach Rz40μm ~ Rz80μm.
    2.3 tungsten carbide insertsl spray aluminum construction
    After blasting operations shall be conducted in 4h arc thermal spray aluminum construction