Maintenance essentials asphalt road pavement disease

[wangkiky]

<p>Asphalt road asphalt Pavement Maintenance should be based on prevention, early occurrence of disease, it is necessary to detect, early hands-on, take preventive maintenance to reduce disease risks to a minimum, to prevent the "minor illnesses dragged big bungle disease. " Key close watch "five points." First run sand point, less than 10 square meters in area, due to the asphalt stripping, ran fine aggregate, surface honeycomb. The second is the local point of settlement, the settlement of more than 2 cm in the vertical and horizontal directions 1m range, driving significant beating. Third, pump pulp, pavement cracks, crack Net infiltration of water to the grassroots, the grassroots appear washed slurry pump. Fourth downs points above the pavement layer partial longitudinal passage formed washboard transverse passage appears car rut. Fifth crack point, horizontal seam, longitudinal seam, soft, rigid joints (eg joint approach slab), etc. cracks dislocation, dislocation height of greater than 5 mm. </P>
<P> The main method of road maintenance, there are four, one impermeable coating. Mainly in the road network for the crack, but no significant deformation, nor jack pulp phenomenon, you can use a thin coat of adhesive patches, to prevent water penetration. Second, pouring water. When the road surface cracks but there was obviously wrong station, and no bite edge phenomenon, filling hot asphalt approach can be used for water treatment. Third heat drying feeding. Pavement cracks appeared, cellular, rutting pavement deformation is not a serious point, heat drying may be appropriate to add new material, artificial stir compaction reinforcement. Fourth Wabu filling. If the disease has spread to the pavement layer below even basic level, you must dig the disease in addition to all the region, stratified filling. Asphalt pavement repair work, the following three aspects need to pay attention to the essentials. </P>
<P> First, pouring hot asphalt repair, pay attention to three points. 1, before pouring, to use a hair dryer and iron claw fracture debris dust cleaned; 2, when hot asphalt heating, the temperature to reach more than 130 ℃, to maintain its good liquidity; 3, after the completion of infusion, to the asphalt cooled to about 60 ℃, when the plasticity remain, with a shovel to eradicate excess surface asphalt pavement to prevent contamination. </P>
<P> Second, the surface layer of the thermal stoppage time, pay attention to three points. 1, the heat drying diseased road to wait until the temperature reaches 100 ℃ or more before starting work; 2, will have to use the iron rake road surface and eradicate diseases harrowing surface of the large aggregates to ensure that the repair effect; 3, add a new after the material to comb shake uniform, dense compacted. </P>
<P> Third, when Wabu filling, pay attention to four points. 1, chiseled disease layer, after clearing waste, use a hair dryer to repair high voltage interface completely blowing ensure repair the bed clean and free of debris and floating dust; 2, sprinkle sticky layer of oil to full screen, and does not flow, unleavened dough should not be dead; 3, layered filling thickness greater than 6 cm Otherwise, surrounded by packing seams to be slightly higher, and stratified to compaction, the degree of compaction to be above 95%; 4, after the filling is completed, use cold patch glue painted four weeks seams to prevent water infiltration. </P>

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