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Low-energy-consumption asphalt concrete pavement hot in-place recycling method

A technology of asphalt concrete and low energy consumption, applied in roads, roads, road repair and other directions, to achieve the effect of reducing porosity, prolonging the life of pavement, and improving the degree of compaction

Active Publication Date: 2016-12-07
河北森远路桥工程有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] The purpose of the present invention is to provide a low-energy-consumption hot-in-place regeneration method for asphalt concrete pavement, aiming at the problems existing in the existing hot-in-place regeneration technology of three heating machines heating the road surface

Method used

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  • Low-energy-consumption asphalt concrete pavement hot in-place recycling method

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Embodiment 1

[0039] In-situ hot regeneration of asphalt concrete pavement was carried out on a certain road in Qinhuangdao City, and the original surface damage of the pavement (such as potholes, cracks, ruts, etc.) accounted for 32.6% of the pavement. On the day of construction, the weather was good, with no rainfall, the atmospheric temperature was above 25°C, and the road surface temperature was above 40°C. There was no precipitation within 2 days before construction, and there was no water accumulation in the old asphalt pavement samples taken before construction.

[0040] Hot-in-place regeneration includes the following steps:

[0041] (1) Clean the road surface and draw guide lines

[0042] The cross slope of the hot-in-place regeneration construction road surface still adopts the original road surface cross slope, and the guide line is drawn outside the width of the road surface to be treated, or the edge line of the road surface is used as the guide line to ensure that the construc...

Embodiment 2

[0056] In-situ thermal regeneration of asphalt concrete pavement for a certain road in Quzhou City. The original surface damage of the pavement (such as potholes, cracks, ruts, etc.) accounted for 28.4% of the pavement, and seriously aged road sections accounted for 33.2%. On the day of construction, the weather was good and there was no rainfall. ℃ and above, there is no precipitation within 3 days before construction, and there is no water in the old asphalt pavement samples taken before construction.

[0057] Hot-in-place regeneration includes the following steps:

[0058] (1) Clean the road surface and draw guide lines

[0059] The transverse slope of the hot-in-place regeneration construction still adopts the original road surface transverse slope, and draws the guiding line outside the width of the road surface to be treated, or uses the edge line of the road surface as the guiding line to ensure that the construction equipment runs straight and the regeneration constru...

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Abstract

The invention provides a low-energy-consumption asphalt concrete pavement hot in-place recycling method to solve the problems existing in the pavement heating process of three heating machines in an existing hot in-place recycling technology, and belongs to the technical field of asphalt concrete pavement maintenance. The method includes the steps of pavement sweeping, guide line drawing, pavement heating, pavement milling and planing, regenerant and new asphalt adding, recycled mixture re-stirring and paving, pavement compaction, high-permeability asphalt spraying to seal a recycled pavement and the like. Two heating machines are adopted for heating the pavement in a gradient heating manner, and the phenomenon that the pavement is heated to be too hot under the condition that the temperature of the pavement is high in summer or in South China is avoided; and for a road section aging seriously, after hot recycling construction is finished, the service life of the pavement is prolonged in a high-permeability asphalt spraying manner.

Description

technical field [0001] The invention belongs to the technical field of asphalt concrete pavement maintenance, and in particular relates to an in-situ thermal regeneration method for asphalt concrete pavement with low energy consumption. Background technique [0002] The hot-in-place regeneration technology is a construction process using asphalt concrete as the surface layer. As a preventive maintenance technology, it provides a brand new surface for the original asphalt pavement. The improvement of the flatness improves the driving comfort; Improve the safety of driving; improve the quality of driving, but also increase the strength of the road surface. Many original surface damages on the road surface, such as potholes, cracks, ruts, etc., have been effectively treated, prolonging the service life of the road. [0003] The current traditional thermal regeneration heating system is composed of 3 heating machines. The heating temperature of the road surface is set in steps....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01C23/06
CPCE01C23/065
Inventor 林子健董焕增殷京京许中恒
Owner 河北森远路桥工程有限公司
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