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View Full Version : Construction Technology of Synchronized Crushed Stone Seal



quangongzi
12-09-2016, 02:15 AM
Requirement: From the perspective of preventive maintenance of asphalt pavement, simultaneous crushed-rock seal technology does not impose higher requirements on construction conditions compared with other technologies, but in order to improve the maintenance performance, this new Technology advantage, or need to have certain conditions. First of all, the road surface damage should be diagnosed, to clear the key issues to be repaired; full consideration of asphalt binder and aggregate quality standards, such as its wettability, adhesion, abrasion resistance, compression resistance; Technical specifications to allow the scope of the paving operation; the right and rational choice of materials to determine the level, the correct operation of paving equipment.Small Road Roller - Shanghai Doan Machinery Technology Co.,Ltd (http://smallroadroller.com)

Synchronous gravel seal construction process: the commonly used structure: the general use of intermittent grading structure, gravel seal stone particle size range with strict requirements, that is the best particle size stone. Taking into account the difficulty of stone processing and anti-skid performance requirements of the road can be 2 ~ 4mm, 4 ~ 6mm, 6 ~ 10mm, 8 ~ 12mm, 10 ~ 14mm 5 files, the more commonly used particle size range of 4 ~ 6mm , 6 ~ 10mm these two, and 8 ~ 12mm and 10 ~ 14mm two stalls are mainly used for low-grade road transition in the lower layer or the middle layer. According to the road surface smoothness and anti-skid performance requirements to determine the stone particle size range. General road cover can be a gravel seal layer, poor in road surface roughness can be said to use the appropriate size of the stone as the lower sealing layer leveling, and then do the sealing layer. Gravel seal as a low-grade highway pavement to be 2 or 3 layers, each layer of stone particle size should be matched with each other to produce embedded crowded role, generally follow the principle of fine under thick; before sealing the original pavement to seriously Cleaning, operation process should ensure that a sufficient number of rubber roller in order to reduce the temperature of asphalt or emulsified asphalt demulsification can be completed in time after the rolling positioning process. In addition, after the closure layer can be opened to traffic, but in the early should limit the speed, to be fully open after 2h traffic, so as to prevent rapid traffic caused by stone splash; modified asphalt as binder, in order to ensure uniform formation of mist spray , Asphalt film thickness, must ensure that the temperature of the asphalt in the range of 160 ℃ ~ 170 ℃; synchronous gravel seal car nozzle height, the thickness of the resulting asphalt film will be different (because the various nozzles ejected fan And the thickness of the asphalt film can be adjusted according to the height of the nozzle. The synchronous gravel sealer should be driven uniformly at the appropriate speed. Under this condition, the spreading rate of the stone and the binder must be matched ; As a surface layer or wear layer of crushed stone seal layer, the use of the original road surface roughness and strength to meet the requirements.
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