The evolution route “academic research summary of Chinese pavement engineering · 2020” mentioned that at present, the research on precast pavement at home and abroad mainly focuses on the precast assembly technology based on cement-based materials and the carpet pavement technology based on flexible materials such as asphalt.

At present, there are few published research results of carpet pavement, and the latest research is related to relevant research units and scholars in the Netherlands and Germany.

But the ideal is plump and realistic.

Summary: through factory prefabrication and on-site assembly, reduce the comprehensive cost, break through the restrictions of asphalt mixing plant and expand the use scene of asphalt pavement.

The factory prefabrication of Precast Asphalt Pavement can theoretically solve many problems of on-site construction quality.

In order to distinguish the on-site asphalt pavement technology, it is necessary to discharge the materials from the asphalt mixing plant.

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In his book “material characteristics and construction technology of curlable precast asphalt pavement”, marshal Dong developed a special modified asphalt material for curlable precast asphalt pavement, improved the mixture ratio, and studied the mechanical properties and road performance of asphalt binder and mixture.

At present, precast pavement technology is a hot research issue at home and abroad.

A typical case is the construction of rural roads in China.

Scholars are actively exploring and trying engineering application.

Through finite element simulation, the mechanical response of the mixture in the curling process is analyzed, which provides a theoretical basis for the engineering practice of curlable precast asphalt pavement.

The Road Engineering Research Institute of Aachen University of technology in Germany is also one of the scientific research institutions that carried out the research on flexible carpet pavement structure earlier.

In 2001, the “roads to the future” project carried out by the Dutch Ministry of transport proposed carpet pavement for the first time, and developed the “roll pave” precast pavement structure based on porous asphalt concrete.

Based on such market segment demand, the technological evolution route of Precast Asphalt Pavement may be as follows: first, the size of prefabrication is plane and regular geometry, mainly considering its transportation integrity and convenience, you can refer to ceramic tiles; Second, the performance of general asphalt mixture only considers the service conditions of asphalt pavement after assembly; In many scenarios, rap materials can be used on a large scale; Third, microwave sensitive materials are embedded at the edge of Precast Asphalt module, or microwave absorbing materials are added to asphalt mixture; Fourth, during on-site assembly, the joint shall be assembled tightly, and microwave equipment shall be used to reheat the module, and the joint position shall reach a certain temperature; Fifth, use rolling equipment for rolling to ensure the thermal connection at the joint position and meet the service conditions of the pavement.

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Through factory prefabrication and on-site assembly, reduce the comprehensive cost, break through the restrictions of asphalt mixing plant and expand the use scene of asphalt pavement.

In order to enhance the connection between the templates, the edge of the module is processed into alternating convex and concave; It can be assembled in alignment during assembly.

The size of prefabrication is plane and regular geometry, and its transportation integrity and convenience are mainly considered.

It has made many achievements in the structural design, performance enhancement and new flexible pavement materials of flexible carpet pavement asphalt pavement.

The pavement can be manufactured and repaired in the factory, and can be quickly installed, removed and recycled on site.

The treatment of asphalt pavement diseases requiring overlay maintenance includes milling technology in most cases; This link cannot be omitted in the process of Precast Asphalt Pavement.

If the whole precast module uses microwave absorbing materials and is rolled after reheating, the flatness effect of asphalt pavement can be improved.

Microwave sensitive materials are embedded at the edges of Precast Asphalt modules, which are reheated after assembly, and thermal connection is formed between modules after rolling.

Introduction precast pavement technology refers to a kind of technology to complete the prefabrication of pavement structure layer in the factory, transport to the construction site for assembly, joint treatment and other follow-up processes, so as to complete the rapid construction of pavement structure.

The application scenario and technology evolution route of Precast Asphalt pavement are discussed in this paper.

Precast asphalt pavement may also have new construction quality problems, mainly including joint treatment and leveling.

Carpet type flexible pavement is to hoist and transport the flexible and crimpable precast road surface to the construction site, and then directly complete the pavement on the existing pavement structure.

This paper focuses on the research and development of crimping equipment and key construction technology, and introduces in detail the key technology, construction process and performance detection through the application example of crimpable precast asphalt pavement engineering, so as to provide theoretical basis and technical support for the application practice of this technology.

In some cases, there is no asphalt mixing plant in the area, or the transportation distance is long, or the price is expensive, so the traditional site-based asphalt pavement construction technology cannot be adopted.

The technology of precast cement concrete pavement is relatively mature and is now in the stage of market application, while the research of Precast Asphalt Pavement Technology is still in the exploratory stage, which is still a certain distance from the realization of industrial assembly.

Many literatures have proposed that precast asphalt pavement is suitable for highway with large traffic volume, especially for rapid repair of urban road pavement, pavement on road structures and emergency repair after pavement damage.

This technology can make the repair of pavement overlay simple and fast.

Application scenario standardization “summary of academic research on Chinese pavement engineering · 2020” mentioned that the precast pavement technology not only overcomes the shortcomings of extensive production, low efficiency and difficult control of construction quality caused by traditional pavement on-site pouring and paving, but also realizes the standardized construction and fine management of pavement structure.

In addition, the cast pavement technology for digital infrastructure construction enables the intelligent sensing devices arranged in the pavement to be accurately put into use, and the survival rate of sensing devices is greatly improved.

At this stage, more than 99.9% of the world’s asphalt pavements are constructed on site, with absolute scale effect and huge system migration cost.

At present, the construction efficiency of emergency milling and resurfacing or overlay of Asphalt Pavement Based on on on-site technology can meet the needs of most scenes.