Yunnan Hydraulic Wet Spray Machine Jingheng Hydraulic Wet Spray Machine Manufacturer

Description :

　　Hydraulic wet spraying machines can be divided into hydraulic pumping wet spraying machines and piston wet spraying machines based on their working principles. The hydraulic wet spraying machine has more stable performance and is derived from the concrete pump. The vulnerable part is one pair of eyeglass plates. The other components are very durable, but their disadvantage is that they are a bit bulky. Don't move.

　　Construction process of hydraulic concrete wet spraying machine: 1. Preparation of construction materials. The entry of wet sprayed concrete materials must be inspected. In addition to complying with relevant national and railway standards, they should also meet the following requirements: (1) Cement: selected and inspected to be qualified. If you are helpful, please purchase and download. Thank you! 1 page (2) Coarse aggregate: Use hard, durable, well graded crushed stones or pebbles, with a grading composition of 5-10mm and a particle size of 16mm, and pass inspection. (3) Fine aggregate: Made of hard and durable medium or coarse sand, with a fineness modulus of 3.2 and an apparent density of 2720kg/m3, it has passed inspection. (4) Efficient water reducing agent: It has little effect on the strength of concrete and the bond strength with surrounding rock; Has no corrosive effect on concrete and steel; Has little effect on the setting time of concrete; Poor moisture absorption and easy storage; Not polluting the environment and harmless to human health. The wet shotcrete for the tunnel in this project uses high-performance polycarboxylate superplasticizer, which has passed the inspection. (5) Rapid setting agent: Special liquid rapid setting agent for wet spraying is used. Before use, compatibility with cement and rapid setting effect tests are conducted, and it is required that the initial setting should not exceed 5 minutes and the final setting should not exceed 12 minutes. The inspection is qualified.. (6) Water: The water quality should meet the relevant standards for engineering water use, and the water should not contain harmful impurities that affect the normal setting and hardening of cement. Sewage, acidic water with a pH value less than 4, and water with a sulfate content exceeding 1% of water weight should not be used.

　　The mix proportion design of shotcrete is selected through experiments based on the properties of raw materials, technical conditions of concrete, and design requirements. The initial strength meets the construction needs, and the 24-hour strength reaches 10.0MPa. The outer slope of the tunnel is made of C25 sprayed concrete, and the initial support inside the tunnel is made of C30 and C25 concrete.

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