KSP-9 jet wet concrete KSP-9 wet concrete pouring jet spray fine aggregate concrete construction method. Commonly used in the pouring of the lining of the tunnel lining, the thin-walled structures such as a wall, ceiling or other structure and steel protective layer. Sprayed concrete dry mix the Law and wet mixing method two. The dry mix cement, sand, stone mixing uniformity of the wet concrete of the KSP-9 jet with compressed air to the nozzle and sprinkler irrigation method with the pressure of the water mixed in the dry state. This method must be skilled personnel to operate the water-cement ratio should be small, gravel shall be graded particle size must not be too large, the amount of cement should not be too small, generally 28 to 34 MPa concrete strength and good adhesion can be obtained. But jet speed, the situation is more serious dust pollution and rebound, subject to certain restrictions on the use. Wet concrete of the KSP-9 jet wet mixing method is marinated concrete sent through pressure pump to the nozzle, and then compressed air spray irrigation method. Construction is appropriate with the mix with the spray of the way, in order to reduce the consistency changes. Lower ejection speed of this method, due to the water-cement ratio increases, the lower the initial strength of the concrete is also but springback improved, the material with the easy to control, the working efficiency than the dry mix method is high. KSP-9 jet wet concrete KSP-9 wet concrete jet characteristics: high quality, reliable work, stable performance, easy operation. Covers different models of the explosion-proof and non-explosion-proof, to adapt to the different construction environment. Walking with a rubber tire, rail wheels (gauge = 600mm, 762mm, 900mm) tires and other forms available for easy selection. New composite compression spring, better sealing. The shotcrete using compressed air, will be a certain ratio of the concrete mixing materials through pipelines and high-speed jet by the spray surface condensation hardening, to form concrete support layer. In recent years, the shotcrete technology with its simple process, the unique effects of economic cost and fast construction speed, in the areas of construction, rail and road tunnel construction, mine development, slope reinforcement widely used. Wet concrete jet 1. KSP-9-type cement, cement should be preferred setting and hardening, good water-holding capacity of ordinary portland cement, followed by the volcanic ash cement, cement grade of not less than 325 #. The fine aggregate shotcrete sand, grit is appropriate fineness modulus greater than 2.5. The water drenched day in advance to tide sand to lift and into a group that lingers is appropriate. KSP-9 wet concrete jet 3. Coarse aggregate shotcrete with stones, particle size should be controlled Conveying pipe diameter of 1/2 or less, the maximum particle diameter of not more than 20mm. Such as gravel particle size is too large, will cause pipe blockage or concrete rebound in construction increased significantly. The springback was mainly the coarse aggregate. According to statistics, in which stones account for 60% to 70%. Mixes coarse aggregate content, the amount of springback will increase, and the larger the aggregate size, the more likely to fall from the sprayed surface bombs. It has been determined, the particle size of 20mm coarse aggregate rebound than 10mm coarse aggregate increased by nearly 60%. The water sprayed concrete water with ordinary concrete may not use the sewage and pH <4 acidic water, the amount of sulfuric acid SO4 2 - more than 1% water and salt water. The company sells a spraying machine model as follows: 1, wet spraying machine: KPS series of wet concrete jet KSP-5/9 wet concrete jet, HSP wet concrete spraying machine and other products; mine tide spray machine: PC5T mine the tide spray machine, PZ Series spraying machine: PZ-5 shotcrete machine, PZ-5B mine explosion spraying machine, PZ-5B motor explosion spraying machine, PZ-5B whole explosion-proof shotcrete machine, and PZ series concrete spraying machines and other products; other species: PCZ-5-type spraying machine, PZG-5C shotcrete machine, HPZ-5 concrete Jets, HPC-VB concrete jet, as well as a variety of other Inoue used the building, spraying machine. 5 shotcrete machine parts: gears, spraying machine steel liner plate, spraying machine quick connector Karan, the material cavity spraying machine, seal plate spraying machine, spraying machine, shotcrete tube, spraying machine nozzle, shotcrete cyclone Accessories nozzle seat of the machine nozzle assembly, spraying machine, spraying machine elbow, spraying machine, rubber sheet, spraying machine spring, spraying machine, spraying machine clamping device, spraying machine tapered sleeve and a series of spraying machine accessories. Machine production capacity of 9m3 / h Concrete Mix ratio 1:4-5C / A use material water-cement ratio ≤ 0.4 maximum transmission distance of 30m maximum aggregate size Φ20mm the conveying tube inner diameter Φ51mm/Φ64mm working air pressure 0.2-0.4Mpa Air consumption amount 10-12m3/min feeding height of 1.1m motor power 7.5KW voltage level 380V machine weight 850kg Dimensions (L × W × H) 2100 × 950 × 1300 (mm)