A kind of hot-in-place recycling equipment for multi-stage asphalt pavement

Abstract

The invention discloses multistage in-situ heat regeneration equipment and a method of an asphalt pavement. The equipment comprises a steel product bracket and a steel pipe bracket, wherein one end of the steel product bracket is fixedly connected with one end of the steel pipe bracket via a plurality of connecting rods; a burner is fixedly mounted at the top end of the steel pipe bracket; the right end of the burner is connected with a milling material lifting device; a second blower is mounted in the steel pipe bracket; the lower end of the steel pipe bracket is connected with a hot air jet-flow device; the burner is externally connected with a heat conduction steel pipe; the heat conduction steel pipe is connected into the steel pipe bracket; a pavement heating plate is mounted at the bottom end of the steel product bracket; and the pavement heating plate is internally equipped with metal fiber felt. According to the method, pavement asphalt is heated and softened by a double heating manner; a multistage combined heating and softening manner is used; heating and milling are performed at each stage; the heating temperature strength is reduced; and the very thin asphalt is milled each time, so that the problem that the asphalt loses activity since the milling each time requires the higher temperature is solved.

Description

technical field [0001] The invention relates to the technical field of hot-in-place regeneration, in particular to a multi-stage asphalt pavement hot-in-place regeneration device and method. Background technique [0002] As the traffic load increases and increases, the requirements for road strength also increase, especially the ability to bear heavy loads, so road maintenance is becoming more and more important. The increase of traffic load causes various forms of damage such as wear, deformation, and cracking of the road surface. These damages reduce the safety of road driving, block traffic, and eventually lead to traffic accidents. The purpose of road maintenance and repair is to provide vehicles with a safe, comfortable and unimpeded driving surface under various climates and conditions. [0003] The current maintenance and repair of asphalt pavement mainly includes: preventive maintenance, restorative maintenance, pavement renovation and pavement reconstruction. Res...

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Problems solved by technology

[0004] At present, for asphalt pavement hot repair or hot regeneration repair technology, the heating of asphalt is mainly done by open flame heating, because it needs to burn oil, the construction site is very smokey, and the environmental pollution is serious. The heating method generally used is the previous domestic one. It is all one-time heating and planing and milling. Due to the high temperature of one-time heating, a lot of asphalt loses its activity because of the high temperature.

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