Asphalt pavement overhaul and medium repair maintenance decision-making method

Abstract

The invention discloses an asphalt pavement overhaul and medium repair maintenance decision-making method. The method comprises the following steps: 1, milling an asphalt concrete layer of an originalpavement downwards for 15-25 mm, enabling the structure depth of a milled surface to reach 2 mm or above, and then cleaning the milled surface by using spraying and pumping integrated equipment; 2, paving a bonding waterproof layer on the milled surface, pouring gravels and coarse grinding balls into a stirring cylinder, stirring for 10 min, pouring out the coarse grinding balls, pouring in asphalt and the gravels, mixing for 15 min, uniformly pouring the mixture of the asphalt and the gravels into the milled surface, and finally rolling and forming by using a pneumatic tyred roller. The coarse grinding balls and the gravels are poured into the stirring cylinder and stirred in advance, the roughness of the surfaces of the gravels can be increased through the coarse grinding balls, and after the roughness of the surfaces of the gravels is increased, the connecting face of the gravels and asphalt can be increased, so the bonding strength with the asphalt is improved.

Description

technical field [0001] The invention relates to the technical field of asphalt pavement, in particular to a decision-making method for medium and large maintenance of asphalt pavement. Background technique [0002] Highway preventive maintenance is a planned strategy of cost-effective measures. It aims at delaying the time of damage to the built highway system and its ancillary facilities, and maintains or improves the functional performance of the system without increasing structural damage. Carrying capacity. "Plainly speaking, preventive maintenance is essentially early defensive maintenance, which is generally comprehensive and holistic. Its function is to eliminate hidden dangers and unfavorable diseases inside and outside the road and its structures through some pre-measures. Conditions are contained and improved to ensure that it realizes or prolongs the designed service life under normal operating conditions. At present, the preventive maintenance technologies used ...

AI Technical Summary

Problems solved by technology

[0003] At present, a lot of crushed stones are used in the maintenance and repair of asphalt pavement, but the surface roughness of the existing crushed stones is not enough, which easily leads to low bonding strength with asphalt, and the cleaning equipment used can only With water spraying, the sewage formed after spraying and cleaning cannot be re-pumped into the water tank for collection. At the same time, the buffering effect of the existing asphalt is not very good, and the bonding strength is not very high.

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