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Asphalt pavement hot in-place recycling process and system

An asphalt pavement and geothermal technology, which is applied in the field of asphalt pavement laying, can solve the problems of low thermal conductivity of asphalt, difficulty in heating asphalt concrete pavement, and easy overheating, aging and burning.

Pending Publication Date: 2020-11-20
湖南途嘉道路养护有限责任公司
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  • Description
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Problems solved by technology

Due to the low thermal conductivity of asphalt, it is a poor conductor of heat, but it is also prone to overheating, aging and burning; various modified asphalts reduce their thermal conductivity again in order to increase high temperature stability; so that the asphalt concrete pavement after forming especially difficult to heat

Method used

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  • Asphalt pavement hot in-place recycling process and system
  • Asphalt pavement hot in-place recycling process and system
  • Asphalt pavement hot in-place recycling process and system

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Embodiment Construction

[0021] Below in conjunction with all accompanying drawings the present invention will be further described, and preferred embodiment of the present invention is: see appended figure 1 to attach Figure 8 , the hot-in-place regeneration process for asphalt pavement described in this embodiment includes the following steps: heating the old road surface - hot raking - reheating the old road surface - hot raking or hot milling and spraying additives - adding new asphalt mixture - forming Mixing material belt - material belt reheating - lifting forced remixing - paving recycled mixture - rolling forming;

[0022] Hot raking is to carry out hot raking immediately after heating, and then use hot air heating equipment to continue to heat the raked road surface with hot air. Hot raking is to rake and heat through the raking heating system on the heating vehicle.

[0023] The harrowing heating system includes a car body 1, front heating components are installed on both sides of the bot...

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Abstract

The invention provides an asphalt pavement hot in-place recycling process. The process comprises the following procedures and flows: heating an old pavement, performing hot raking, reheating the old pavement, spraying an additive, performing hot raking or hot milling, adding a new asphalt mixture, forming a mixture belt, reheating the mixture belt, lifting and forcibly restirring, paving a regenerated mixture, and performing rolling forming. After the scheme is adopted, configuration is scientific, procedures are complete, structure is reasonable, heat efficiency is high, and quality is reliable.

Description

technical field [0001] The invention relates to the technical field of asphalt pavement laying, in particular to an in-situ heat regeneration process for asphalt pavement. Background technique [0002] At present, the annual construction volume of hot-in-place regeneration of asphalt pavement in my country is about 10 million square meters. The equipment used mainly includes hot-in-place regeneration units produced by Anshan Senyuan and Nanjing Yingda, and Wirtgen hot-in-place regeneration units imported from Germany. , and its purchase cost is high. Asphalt concrete pavement is mainly composed of asphalt and crushed stone materials. Due to the low thermal conductivity of asphalt, it is a poor conductor of heat, but it is also prone to overheating, aging and burning; various modified asphalts reduce their thermal conductivity again in order to increase high temperature stability; so that the asphalt concrete pavement after forming Heating is especially difficult. Contents...

Claims

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Application Information

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IPC IPC(8): E01C23/06
CPCE01C23/065
Inventor 王曦田力蔡剑田罗生吴超
Owner 湖南途嘉道路养护有限责任公司
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