Fracture grouting repair

Repairing cracks grouting repair shall meet the following requirements: ( 1) Remove foreign bodies in concrete crack surface loose materials and seam; ( 2) According to the 300 - LQOOmm spacing grouting mouth, crack, crack intersections and cracks in the end of the both sides of embedding grouting mouth; ( 3) Embedding grouting mouth along both sides of the seam in the method of drilling diagonally into hole, hole deep cross through the cracks, and the grouting mouth sealing pads have enough depth of embedment, ensure the sealing effect; ( 4) According to the B. 1. Article 1 to joint sealing process of cracks, the examination of the compressed air mouth connected and closed grouting effect; ( 5) According to the test of the filling slurry ratio accurately weighing, according to the curing time and filling slurry grouting speed increases with the increasing with use; ( 6) According to the vertical seam from bottom to top, from one end to the other side of the horizontal seam, in order to pressure grouting and grouting pressure to zero. 2 - 0. 8MPa:( 7) After waiting for slurry curing, demolition of grouting mouth, and the concrete surface finishing.