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Porous thermal conductive asphalt concrete pavement heat exchange system and use thereof

A technology of asphalt concrete and heat exchange system, applied in applications, air conditioning systems, indirect heat exchangers, etc., can solve problems affecting road surface quality, durability and service life, prone to rutting, wave movement, etc., to reduce road maintenance cost, extended service life, reduced low temperature cracks and high temperature deformation effects

Active Publication Date: 2009-03-18
武汉理工大产业集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, when the temperature is high in summer, the temperature of the asphalt pavement can reach 70°C, and under the action of vehicle loads, rutting, wave movement, and wheel sticking are prone to occur; Temperature shrinkage cracks will appear again, seriously affecting the quality, durability and service life of the pavement; on the other hand, the snow and freezing weather caused by low temperature will pose a great challenge to road traffic safety, and the closed and restricted road traffic will definitely affect traffic. Contribution to Economic Construction

Method used

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  • Porous thermal conductive asphalt concrete pavement heat exchange system and use thereof
  • Porous thermal conductive asphalt concrete pavement heat exchange system and use thereof
  • Porous thermal conductive asphalt concrete pavement heat exchange system and use thereof

Examples

Experimental program
Comparison scheme
Effect test

example 1、 example 2 and example 3

[0039] The percentage by weight of the composition of common asphalt concrete among the example 1 is: coarse aggregate 54%, fine aggregate 26%, asphalt 6.5%, graphite powder 0%, slag powder 13.5%.

example 2

[0040] In Example 2, the composition weight percent of heat-conducting asphalt concrete is: coarse aggregate 54%, fine aggregate 26%, asphalt 6.5%, graphite powder 11%, mineral powder 2.5%.

example 3

[0041] The composition weight percent of porous heat-conducting bituminous concrete in the example 3 is: coarse aggregate 62%, fine aggregate 19%, asphalt 4.5%, graphite powder 11%, slag powder 2.5%, TPS modifier 1.5%, polyester fiber 0.3% %. Its related performance indicators are shown in Table 1. It can be seen from Table 1 that after adding graphite powder, the thermal conductivity of porous asphalt concrete increases from 1.52W / m·K to 2.69W / m·K; other properties meet the requirements of design specifications.

[0042] According to the ratio of Example 1, the upper layer and the lower layer were generated, and the ratio of Example 3 was used to generate the middle layer for combined rutting. The test showed that the dynamic stability was 4152 times / mm, and the overall rut depth was 4.73mm. After cutting the rutting plate from the test site, it was found that the contribution of the porous middle surface to the rutting depth was 2.81 mm, but it still met the design requirem...

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Abstract

The invention provides a porous heat-conducting asphalt concrete pavement heat exchange system, which comprises an asphalt concrete pavement heat exchange device (1) laid on a roadbed, wherein the device consists of a first close-graded asphalt concrete surface course (9), a porous heat-conducting asphalt concrete surface course (10) segmented by prefabricated dense partition boards (13), an emulsified asphalt concrete seal layer (14) and a second close-graded asphalt concrete surface course (11); the system is provided with silicone rubber water penetration preventing layers (12) which are distributed on the surfaces of the two close-graded asphalt concrete surface courses and penetrate the inside of the surface courses; and the asphalt concrete pavement heat exchange device (1), a heat reservoir (2), an auxiliary heat source (3) and a user heat exchanger (4) are connected through pipelines and a fan (6), so as to form a thermal circulation closed loop of the system. The system has the advantages of energy conservation, emission reduction, low operation and maintenance cost and the like, and can be used for collecting solar energy, maintaining pavement and heating / cooling buildings.

Description

technical field [0001] The invention relates to heat exchange using roads, in particular to a porous heat-conducting asphalt concrete pavement heat exchange system and its application. Background technique [0002] In recent years, the energy shortage at home and abroad has become increasingly tense. At the same time, the greenhouse effect and environmental pollution caused by the use of fossil fuels have made it imperative to develop and utilize renewable energy. Solar thermal utilization is one of the main technical approaches at present. Heat collection is an important part of solar heat utilization technology. Heat collection materials are the key to solar heat collection systems. The absorption performance of heat collection materials for sunlight determines the quality of the entire heat collection system. Asphalt concrete takes advantage of its high absorption rate of the solar spectrum, and the asphalt pavement is like a huge solar absorbing panel. If the heat collec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01C7/08E01C7/18E01C7/32F28D20/00F24F5/00
CPCY02B10/20Y02B10/24Y02E70/30Y02E60/142Y02A30/272Y02A30/60Y02E60/14
Inventor 吴少鹏陈明宇陈美祝文进韩君
Owner 武汉理工大产业集团有限公司
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