The surface treatment methods and requirements of cement concrete projects are related to the requirements of engineering characteristics. Therefore, the equipment and construction techniques used are different according to the requirements of the project. The main purpose of bridge deck chiseling is to solve the problem of adhesion between layers. The floating slurry of the cement concrete bridge deck is the main factor that induces the failure of the bridge deck waterproof layer, the failure of the interlayer bonding and the failure of the bridge deck paving. Therefore, if the bridge deck laitance is not completely cut out, under the action of the driving load and vibration, the laitance will cause delamination failure due to insufficient shear resistance, and will break under the action of water erosion, resulting in the destruction of the upper asphalt concrete layer. .

1. Bridge deck chiseling should not only remove the laitance, but also form an uneven surface, that is, the difference between the peaks and troughs of the surface after being chiseled, the mil value should be large, only in this way can the layers be firmly bonded. Shaving of semi-rigid pavement base layer The cutting depth and operation requirements of semi-rigid pavement base layer of expressway before laying asphalt concrete, as well as the requirements of chiseling equipment and bridge deck.

2. The purpose of these two surface treatments is to make the asphalt concrete pavement and the base layer be able to bond firmly, and to prevent water seepage, the former is to chisel the polished old cement concrete pavement into a rough surface, the latter It is to remove tire marks on the airport runway. The purpose of the two is to correct and restore the anti-skid and effectively improve the ability to resist vibration and deformation.

3. The chiseling of cement pavement and airport runway The chiseling requirement of cement pavement and airport runway is to prevent vehicles from slipping when driving and landing.