Reforming method of old cement concrete road surface

Abstract

The invention relates to a reforming method of an old cement concrete road surface. Several kinds of methods for overhauling and reforming the old cement concrete road surface exist, the most frequently used method comprises the step of additionally paving a road surface with an asphalt mixture overlay layer, but the method has the biggest defect that a reflection crack is extremely liable to be generated at a seam corresponding to an old road surface panel, of the asphalt overlay layer. In order to overcome the defect of the reforming method of the old cement concrete road surface, the invention aims to provide the reforming method which can overcome the defect that the reflection cracks are generated when the old cement concrete road surface is additionally paved with the asphalt layer. The reforming method for solving the technical problem comprises the following steps of additionally paving the old cement concrete road surface with the asphalt layer at an appropriate temperature environment, then performing modified treatment on the additionally paved asphalt, and then in the additional paving process, controlling the thickness of the additionally paved layer.

Description

【Technical field】 [0001] The invention relates to a reconstruction method of old cement concrete pavement, which comprises the step of paving an asphalt overlay layer at low temperature, the step of selecting the thickness of the overlay layer and the step of asphalt modification treatment. 【Background technique】 [0002] There are several methods for overhauling the old cement concrete pavement, but the most commonly used method is to add asphalt mixture overlay on the road surface. This method is not only simple and convenient, but also can effectively improve the performance of the old cement concrete pavement, and the construction period short, relatively low cost, and little impact on traffic and the environment; the pavement after reinforcement and repair involves a composite structure of rigid and flexible pavements. The most prominent advantage of this composite pavement structure is that its lower layer has high strength. The cement concrete road slab is used as the...

AI Technical Summary

Problems solved by technology

[0002] There are several methods for overhauling the old cement concrete pavement, but the most commonly used method is to add asphalt mixture overlay on the road surface. This method is not only simple and convenient, but also can effectively improve the performance of the old cement concrete pavement, and the construction period short, relatively low cost, and little impact on traffic and the environment; the pavement after reinforcement and repair involves a composite structure of rigid and flexible pavements. The most prominent advantage of this composite pavement structure is that its lower layer has high strength. The cement concrete road slab is used as the base layer, which can withstand large vehicle loads. The asphalt overlay layer on the upper layer can significantly improve the quality of the road surface, reduce noise and dust, prevent rutting, and enhance driving comfort and safety; The defect is that the material properties of the lower layer on the pavement are very different. The old cement concrete pavement is greatly affected by temperature changes, and there are cracks and joints on the old concrete slab, accompanied by phenomena such as staggered platform and void. Under the joint action of temperature and stress, the asphalt overlay is prone to reflective cracks at the joints corresponding to the old road slabs. Once the cracks penetrate the surface, it will cause slurry and water damage to the asphalt surface, causing further cracking of the asphalt surface. , greatly shorten the service performance and service life of the asphalt overlay