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Specification for chiseling and roughing of concrete

Time: June 3, 2020 09:30 source: unknown author: admin

Specification for chiseling and roughing of concrete
High pressure roughing and punching machine is mainly used in construction, hydropower dam, bridge and other projects, and its application range is very wide. It has been widely used in many concrete construction fields because of its high roughening efficiency, close combination of new and old concrete, improvement of engineering quality and energy conservation and environmental protection. In order to improve the working efficiency of the chisel machine, strictly follow the concrete Operation specification of chisel machine Operation is also necessary.
1、 Technical requirements before punching and chiseling
1. Determine the time. Too early roughing will lead to loose stones on the working face, and too late will greatly reduce the effect and efficiency of punching. Therefore, the roughing operators should be familiar with the punching standards and be able to master the punching time.
2、 Inspection and preparation before operation of punching and chiseling machines
1. Before the start of punching operation, if there are sundries on the working surface, the sundries should be removed first.
2. Before connecting the power supply, check whether the voltage indicated by the punching machine is the same as the connected voltage, and use the socket with leakage proof circuit breaker protection. When using the extension cable, it should be considered that the cable used can meet the capacity of the punching machine.
3. Before roughing and chiseling, the sequence and time of roughing operation should be planned, and the layout and inspection of water and electricity pipelines should be carried out. Check whether the voltage on the line is the same as the voltage required by the punching machine. The electrical system must be handled by qualified technicians, and safety measures such as overload protection and leakage protection should be set.
4. Connect the water pipe to the water supply. Then connect the water pipe with the water inlet on the scouring machine, and pay attention to removing the sediment from the interface and the filter net.
5. Start the equipment to carry out punching operation experiment, first use a small pressure, and then determine the starting time and water pressure of punching.
2 chipping Technical matters in punching operation
1. The best angle between the punching gun and the ground is 45 ° and the nozzle is 10-20cm away from the working face.
2. When the cement slurry has thick or high strength, fan-shaped nozzle should be used to cut and decompose the milk skin, and then the rotary nozzle should be used for roughing to obtain higher working efficiency. The rotary nozzle can be directly used for roughing when the slurry has a thin emulsion.
3. When punching and chiseling, the parts with large fluctuation and dense reinforcement should be roughened from multiple angles.
4. When punching and chiseling, the cement slurry attached to the steel bar, embedded parts and formwork can be washed clean.
5. When punching and chiseling, the edges and corners of the roughened surface and the water forbidden area shall be covered with protective materials in advance.
6. For the working surface with thermal insulation facilities, if the area of the working surface is large, resulting in long time of roughing operation, the thermal insulation facilities at the roughing position must be restored in time.
7. Roughing and chiseling standards: remove all laitance, loose materials and pollutants on the joint surface, subject to the slight exposure of coarse sand or small stones and no milk skin, and the coarse aggregate shall not be washed out.
3 chipping Matters needing attention in roughing construction
1. Do not touch the punching machine when hands are wet or barefoot.
2. When the punching machine is started, the plug cannot be pulled out from the socket at will. When the punching machine is finished, turn off the power supply and water supply switch in time.
The important reason for the machine to run without water is that the water is not enough.
4. It is not allowed to carry out scouring operation when the temperature is lower than 0 ℃.
5. Do not operate the equipment for more than 2-3 minutes when the spray gun is closed, otherwise, the temperature of circulating water will rise rapidly and the sealing pump will be damaged.
6. It is forbidden to add covering when the punching machine is working.
7. Do not use the punching machine in case of thunder or rain, or spray water onto the punching machine or charged body.
8. It is not allowed to point the nozzle to people, especially to avoid rushing to other people's feet and legs during operation.
9. The construction personnel shall wear appropriate protective clothing when punching and chiseling.
10. When it is found that the punching machine is damaged, the power and water supply switches should be turned off immediately, and the treatment should be carried out in time.
11. Maintain and repair the roughing and chiseling machines in time, and remove the dirt on the surface in time.