Method for repairing asphalt pavement cracks

Abstract

The invention discloses a method for repairing asphalt pavement cracks, comprising the following steps: a. opening a trench: setting the trench size according to the crack size and opening the trench;b. cleaning the trench: cleaning disintegrating slags in the trench and dust at the periphery of the trench after finishing opening the trench; c. pouring a crack: pouring cold crack filling materialin the trench, and performing vibration operation on the cold crack filling material after crack pouring; d. filling materials: filling joint stones in the trench and performing vibration compactionoperation on the stones until the stones after vibration and compaction in the trench level with the pavement; and e. curing. By using the method in the invention, asphalt pavement cracks can be effectively repaired by cold-patch notching and vibration, the cracks and gaps at the periphery thereof can be completely closed, the materials in the trench can be integrated with the original asphalt pavement after repairing, thus having high strength, resisting water encroachment thoroughly, improving the service life of the asphalt pavement remarkably and saving investment on whole-life maintenancecosts of the asphalt pavement greatly.

Description

technical field [0001] The invention relates to the field of traffic road maintenance, in particular to a method for repairing cracks on asphalt pavement. Background technique [0002] After the asphalt pavement pavement is completed and opened to traffic for a period of time, cracks will appear under the action of various factors. If these cracks are not treated in time, with the continuous entry of water, it will make the figure 1 The softening of the base layer and even the subgrade under the middle surface will lead to a decrease in the bearing capacity of the pavement, causing pumping, network cracks, subsidence, and platform misalignment, thereby accelerating the damage to the pavement. [0003] The repairing of cracks in the prior art is mainly divided into two types: thermal filling and cold filling. The caulking material used in thermal joint filling is solid or viscous liquid at room temperature, and cannot be directly filled. It is necessary to configure special...

AI Technical Summary

Problems solved by technology

However, the existing cold filling joints generally adopt artificial direct filling technology, which has great limitations and deficiencies.

First of all, the existing technology can only repair mild cracks with a crack width of less than 3 mm; second, because the emulsified asphalt is directly poured into the cracks, the amount of emulsified asphalt poured is small, and the emulsified asphalt cannot fill the entire crack and its surrounding spaces , the purpose of completely closing the cracks and the surrounding voids cannot be achieved; third, because the cracks are simply filled, the emulsified asphalt has a limited infiltration flow rate in a short period of time, and the height of the material in the cracks is often reached after 24 hours or even longer. will be significantly reduced, and within a certain period of time, as time goes on, the height of the material in the crack will continue to decrease. Therefore, the asphalt pavement treated by the existing cold method often reappears at the crack shortly after maintenance. Cracks; Fourth, the strength of the filling material is much lower than that of the asphalt surface material. Therefore, the repaired cracks often appear spring cracks and autumn cracks, autumn cracks and winter cracks, and the service time is short, requiring multiple repairs, and the maintenance cost of the whole life is high The phenomenon

It can be seen that the existing cold method joint filling technology, the repair process is too simple, can not give full play to the performance advantages of emulsified asphalt materials, the repair effect is poor, and the maintenance investment of asphalt pavement throughout the life is high

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