Maintenance measures 

   Total cement concrete pavement maintenance measures are: crack repair, some board or replace the whole board; surface localized damage repair; plate bottom elevation or reinforced foundation grouting; dislocation treatment; restore skid resistance and so on. 

1. crack repair 

   (1) Direct method is suitable for the construction of poured concrete shrinkage cracks generated. Not in front of traffic, but found cracks in the concrete slab, available polysulfide epoxy adhesive materials such as polymer chemistry perfusion. 

   (2) For the opening sections of the cracks can be repaired using the new irrigation sewing machine and supporting the construction process: First, vehicles, equipment and materials ready: 

       1) 1 1.5-ton truck, a 18KW generator sets, 1 thermal reactor, two clear sewing machine, a desk blowing sewing machine, 2 sets of irrigation sewing machine 

       2) modified asphalt pouring Next, the construction process (method) 

           a. Set construction site safety warning signs before; 

           b. melt or agitation materials (modified pouring asphalt); 

           c. clear seam: to ensure that the seam depth of 3cm; 

           d. blowing joints: the dust and debris blown clean inside seam; 

           e. pouring: using irrigation sewing machine before pouring the heated nozzle heating the seam, and then pouring. 

2. portion of the plate or piece of board replacement 

   Since then, the seepage cracks soften the grass roots, broken concrete slabs broken into plates, the entire board should be chiseled in the post-cured grass, re-pouring new concrete blocks. Case of seepage at the seams, jack plate void caused mud crack segment, then chiseled 1/3 to 1/2 plate area, after handling the grassroots level, with early strength concrete pouring repair. 

3. surface localized damage repair 

   (1) local wear, patching potholes and peeling: first with a wire brush to remove debris and clean the dust of the defects, the choice of these rapidly solidified high strength materials prepared mortar repair. Or use picks chisel deep 3 ~ 5cm, washed away, the rapid solidification of high-strength material with the above formulation to be repaired concrete stones. 

   (2) wear a large area repairs: Available picks chiseled surface 3 ~ 5cm, with a washing machine, pump high pressure water washed away after using these fast-setting high-strength concrete repair material formulated pebbles plate flush with the neighbor, and then make the same face conservation. 

4. plate bottom plate and foundation reinforcement grouting elevation 

   Between the concrete pavement and grass, because the road leading to subsidence void, filling the bottom plate can be used to raise the sector's approach appears to make it back to the original position. 

5. Recovery scratch resistance 

   General mechanical (such as diamond sawing machine, spiral cutter Saw) groove or file marks. 

6. dislocation treatment 

   Slight dislocation can be taken to repair mechanical planarization or overlay method. As part of the foundation caused by too soft, you should use the board to raise the bottom plate grouting treatment. 

   Cement Concrete Pavement Maintenance Technology is one with a strong scientific and practical subjects. As part of our maintenance department should actively explore, from the practical work, constantly sum up, exchange experiences, to accumulate more conservation technology, feasibility of the method.