The so-called synchronous gravel seal, is the use of special equipment that is synchronized gravel seal car and bonding materials (modified asphalt or modified emulsified asphalt) simultaneously spread on the road, through natural driving or tire roller rolling Single layer of asphalt gravel wear layer, he is mainly used as a pavement surface layer can also be used for low-grade highway surface construction. The simultaneous gravel seal concentrates the spraying of the binder with the aggregate process in a vehicle at the same time, allowing the gravel particles to come into contact with the sprayed adhesive immediately. At this point, due to hot asphalt or emulsified asphalt flow is better, can be buried at any time deeper into the binder. The simultaneous gravel sealing technology shortens the spacing between the adhesive spray and the aggregate spreading, increases the area of the aggregate particles and the binder, makes it easier to ensure a stable ratio between them, improves the work efficiency, Reduce the equipment cultivation, reducing the construction costs. Asphalt pavement after the treatment of synchronous gravel seal, the road has a good anti-skid performance and impermeability performance, can effectively cure the road lean oil, drop particles, minor cracks, rutting, subsidence and other diseases, mainly for the road Preventive and Reproductive Maintenance The simultaneous gravel sealer is used to synchronize the spraying of the asphalt binder and the spreading of the stone so that there is the most adequate surface contact between the asphalt binder and the aggregate to achieve the maximum between them Bonding of special equipment.Road Repair Equipment - Doan Machinery
Whether for road maintenance or as a transitional pavement, the performance of synchronous gravel seal is significantly better than other methods, thus greatly reducing the road maintenance and repair costs. On the original road disease repair role. After the road surface of the road surface of the small cracks, reticulate, lean oil, oil and so have a good repair effect. Short construction period. Sealing the road can be speed limit open traffic, ease the traffic situation, to ensure the normal use of the road. Construction process is simple, practical, wide range of applications. Reduce road maintenance costs. Compared with the traditional black road maintenance, synchronous gravel seal layer use efficiency is high, unit construction cost is low, can save 40% to 60% of the funds.
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The practical results show that the microwave heating has the characteristics of fast heating speed, uniform heating and large heating depth. By means of microwave heating, the microwave is used to improve the heating and maintenance of the vehicle. The cost of repairing pits is lower than that of traditional heat radiation heating integrated maintenance vehicles, and the measures taken by microwave heating integrated maintenance vehicles to prevent microwave leakage are introduced.
With the increasing mileage of expressway traffic in Fujian Province, the increasing age of the province, the current 11 only traditional radiation heating asphalt pavement repair car has been unable to meet the province's highway asphalt pavement maintenance needs. In order to ensure the smooth development of maintenance tasks, to ensure the safe and smooth flow of the highway, the purchase of new, suitable for the maintenance of the province's asphalt pavement integrated maintenance equipment has become a top priority. From August to November 2010, Fujian Expressway Maintenance Engineering Co., Ltd. introduced a microwave heating asphalt integrated maintenance vehicle in Longyan area conservation company trial, and the relevant performance indicators, the cost of the actual calculation.Road Repair Equipment - Doan Machinery
The Principle and Advantages and Disadvantages of Existing Asphalt Pavement Repair
Fujian Province Highway Maintenance Engineering Co., Ltd. to undertake Fujian Province, 2700 km highway maintenance tasks. Pavement pit repair task is mainly composed of 11 early asphalt pavement integrated maintenance vehicles to complete. The car on the asphalt pavement heating method for the heat radiation heating. The principle of heating: liquid liquefied gas after vaporization in the bottom of the heating wall to fully burn, heat through the refractory bricks blowing to the ground, intermittent heating, layers of penetration. This type of heating is actually a visible light in the pavement, because its conduction and convection accounted for a large proportion of radiation heat is small, easy to make the road was scorched or oxidized. It is not conducive to the recycling of asphalt mixture. The advantages of the thermal radiation heating method are: heating wall heat storage capacity, radiation temperature is high, thus ensuring sufficient radiation energy. Refractory brick work, the temperature reached more than 1000 ℃, the surface of a red, easy ignition, and the temperature in the work area more uniform. The main drawback is that, despite the use of intermittent heating, it is not easy to control the surface temperature of the heated pavement. Because a large number of visible radiation is very concentrated, energy radiation fluctuations, the peak temperature of the road again and again, not easy to balance. Refractory bricks have lower strength, higher cost, continuous high temperature use and easy to damage after vibration, increase the use of cost. Refractory brick replacement professionals and professional tools, maintenance is very convenient.
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