The hand-held single/double/three head roughing machine is mainly used for chiseling the concrete surface of expressway, railway bridge deck and box girder, removing, repairing, renovating and strengthening the concrete surface of building walls, floors, and municipal works. In the process of use, it not only improves the working efficiency and quality, but also makes the working surface even in roughness. After removing the laitance from the surface layer, the paving concrete is firmly bonded, Finally, the service life and safety factor of the working object have been greatly improved.
The hand-held single head roughing machine is light, flexible and easy to operate. The frequency of chiseling is 2400 times per minute. The working efficiency is determined according to the site environment and construction requirements. For example, C30-C50 concrete is 3~8 square meters per hour. It needs to be operated with an air compressor with a pressure of 0.5m3/5kg. High strength carbide chisel head.
During construction, the concrete pavement layer shall reach the design concrete strength, and the surface shall be flat, clean, and free of impurities, oil stains, dust, etc. The concrete surface of the bridge deck pavement shall be roughened with a roughing machine to remove the laitance and sundries on the surface, and then cleaned with a rotary wire brush cleaner. Then, the floatation, sedimentation and fine particles shall be removed with a blower or vacuum cleaner, and the concrete surface shall be washed with a high-pressure water gun. After drying, the construction can be started. The main reason for roughening is to chisel away the laitance on the concrete surface, so that the concrete at the new old junction is dense and firmly bonded.
