Influence of Asphalt on Pavement Performance

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MessagePosté le: 28/11/2016 02:45:54    Sujet du message: Influence of Asphalt on Pavement Performance Répondre en citant

1. Requirement: From the point of view of preventive maintenance of asphalt pavement, the synchronous crushed stone sealing technology does not put forward higher requirements for construction conditions compared with other technologies, but in order to improve the maintenance performance,Multifunctional Road Cutting Machine The advantages of new technology, 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.

2, synchronous gravel seal construction process:

(1) commonly used structure: the general use of intermittent gradation structure, crushed stone sealing layer of stone particle size range with strict requirements,road grooving machines performance Introduction that is the best 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.

(2) 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 coarse under the fine;

(3) before the seal layer% of the original examination to seriously clean the original road, the course of the operation should ensure that a sufficient number of rubber roller in order to reduce the temperature of asphalt or emulsified asphalt demulsification in time to complete 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 completely open after 2h traffic,lasting value asphalt recycling machine for sale resellers so as to prevent rapid traffic caused by stone splash;

(4) When using the modified asphalt as the binder, in order to ensure uniform spray, uniform thickness of the asphalt membrane, we must ensure that the temperature of asphalt in the 160 ℃ ~ 170 ℃ range;

(5) The thickness of the asphalt film is different because of the different injector height of the synchronous gravel vehicle (because the overlap of the fan-shaped asphalt sprayed by each nozzle is different), the thickness of the asphalt film is adjusted by adjusting the height of the nozzle Claim;

(6) synchronous gravel seal car should be the appropriate speed of uniform driving, in which the premise of stone and binder material must be the spread of the two match rate;

(7) as a surface layer or wear layer of gravel seal layer, the use of the conditions of the original road surface roughness and strength to meet the requirements.
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MessagePosté le: 28/11/2016 02:45:54    Sujet du message: Publicité

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