Rotary vane vacuum pump used in the concrete construction _

the use of the rotary vane vacuum pump is a kind of concrete mechanical dewatering method. Rotary vane vacuum pump application in the concrete construction, which can effectively prevent surface shrinkage, improve the frost resistance, reduce the water cement ratio, shorten the flattening, plaster, drawing. Mould processing clearance time sped up the template turnover, improve the construction efficiency, reduce the labor intensity and create conditions for concrete mechanical construction. Asphalt concrete road engineering, and other types of cement concrete pavement project, through the design length times width ( Including turning area) Computing, not deduct all kinds of Wells of the area.

at this stage, the top commercial concrete water pump is widely used in civil construction. The pumping concrete products with large slump and many cement slurry. During the period of construction cracks often occur. Civil engineering is very nervous, very high quality requirements. Recommended rotary vane vacuum pump suction technology, which can achieve good effect.

used for vacuum suction vacuum vane vacuum pumps forming principle is what?

vacuum suction and water absorption process using high liquidity of commercial concrete, into the mold, then use rotary vane vacuum pump suction. By using the pressure differential between the atmospheric pressure and vacuum chamber, discharge of commercial concrete mixture excess moisture. Gas station.

when vacuum processing, in commercial concrete on the surface of the vacuum chamber formed in the vacuum, vacuum unit expressed in vacuum for pa. With the extension of vacuum processing time, the parts of the commercial concrete water and air is expelled, solid phase particles near each other, continue to be squeezed out water, slurry concentration, water - Cement ratio to reduce with the increasing commercial concrete. For commercial concrete after vacuum suction treatment, the residual water cement ratio is not less than 0. 3, will not affect the normal cement hydration.

through rotary vane vacuum pump suction technique in engineering, the application of this technology has the following features:

1. To speed up the construction. Aspiration type commodities concrete using liquidity concrete, slump, casting, paving, vibration time is short, easy to operate. Immediately after vacuum adsorption, can daub, shorten the rest time, reduce the influence of season and climate conditions, and shorten the construction period.

2。 Improve the quality of floor unit. Floor is made of vacuum suction technology, commodity concrete structure is compact, high strength, uniform material, beautiful appearance, quality assurance. In addition, the extreme smoothness, compaction and slurry enhance the durability of concrete surface can greatly improve the commodity, such as wear resistance, impermeability and crack resistance.

3。 Improve the working conditions. Using mechanical smooth and daub instead of manual operation can reduce the labor intensity and improve efficiency. Due to the use of fluid commercial concrete, to avoid the strong vibration for a long time, reduces the noise, and improve the working environment and operating conditions.

4。 Save raw materials, reduce the engineering cost. Compared with the normal production process, vacuum suction process adds to the cost of vacuum adsorption equipment, but reduces the template leasing fees; Construction speed is fast, can greatly reduce the production cost.

this paper mainly introduces the application of rotary vane vacuum pump in the concrete construction method. After engineering floor adopts vacuum suction technology, can better control the surface cracking phenomenon, reduce the initial water cement ratio, improve the commercial concrete. Compactness to speed up the construction speed and achieved a certain economic benefits. Commercial concrete vacuum suction process is to improve the construction quality, speed up the construction progress of advanced technology. In water, vibration and smooth after, put the sucker on the commercial concrete surface, start the vacuum equipment, and suck out free water from commercial concrete. A method of lowering concrete water-cement ratio. It has been widely used in road and large industrial plants, airports, ports, DAMS and other projects.

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