Analysis of heat-reflective coating property for asphalt pavement based on cooling function

ZHENG Mu-lian; HE Li-tao; GAO Xuan; WANG Fei; CHENG Cheng

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ZHENG Mu-lian, HE Li-tao, GAO Xuan, WANG Fei, CHENG Cheng. Analysis of heat-reflective coating property for asphalt pavement based on cooling function[J]. Journal of Traffic and Transportation Engineering, 2013, 13(5): 10-16.

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ZHENG Mu-lian, HE Li-tao, GAO Xuan, WANG Fei, CHENG Cheng. Analysis of heat-reflective coating property for asphalt pavement based on cooling function[J]. Journal of Traffic and Transportation Engineering, 2013, 13(5): 10-16.

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Analysis of heat-reflective coating property for asphalt pavement based on cooling function

1.
Key Laboratory for Special Area Highway Engineering of Ministry of Education, Chang'an University, Xi'an 710064, Shaanxi, China
2.
Shaanxi Provincial Communications Construction Group, Xi'an 710075, Shaanxi, China
3.
Zhongjiao Tongli Construction Co., Ltd., Xi'an 710075, Shaanxi, China
4.
School of Civil Engineering, Southwest Forestry University, Kunming 650224, Yunnan, China

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Author Bio:
ZHENG Mu-lian(1977-), female, professor, PhD, +86-29-82334846, zhengmulian@163.com
Received Date: 2013-04-06
Publish Date: 2013-10-25

Abstract

Abstract

In order to improve asphalt pavement high temperature stability in summer and mitigate urban heat island effect, a new type of heat-reflective coating was applyed on the surface of asphalt pavement.The working principle of heat-reflective coating was analyzed, the thermalphysical environment performance comprehensive test device of heat-reflective asphalt pavement was developed, and the cooling effects of asphalt mixtures with different color coatings were studied by using the device.The skid resistance performances of coatings with different thicknesses were evaluated based on pendulum type friction coefficient measuring instrument.Analysis result shows that the cooling effect of white heat-reflective coating is better than grey coating, white heat-reflective coating on specimen can cool 18 ℃-25 ℃ within door test, the temperature of 2.5 cm place inside specimen reduces by 9.4 ℃, and the temperature of grey coating surface reduces by 12 ℃.The cooling ability of heat-reflective coating increases with the increase of coating thickness, but it will tend to be constant while reaching certain thickness.The sensible dosage of heat-reflective coating is 0.6 kg·m^-2 comprehensively considering cooling effect and cost.With the increase of coating thickness, the surface skid resistance performance of pavement reduces, and it is recommended to spread antiskid particles in the coating to meet traffic safety requirements.
- road engineering,
- asphalt pavement,
- pavement temperature,
- heat-reflective coating,
- rutting,
- heat island effect

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References

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