Laboratory measurement for albedo and internal temperature of colored pavement
CSTR:
Author:
Affiliation:

(1. College of Civil and Transportation Engineering, Hohai University, Nanjing 210098, China; 2. National Engineering Laboratory of Highway Maintenance Technology(Changsha University of Science & Technology),Changsha 410114, China; 3. Beijing Municipal Road and Bridge Zhengda Road Technology Co., Ltd., Beijing 100071, China)

Clc Number:

U414

Fund Project:

  • Article
  • |
  • Figures
  • |
  • Metrics
  • |
  • Reference
  • |
  • Related
  • |
  • Cited by
  • |
  • Materials
  • |
  • Comments
    Abstract:

    In order to evaluate the reflective performance of colored pavement materials accurately, factors affecting the field measurement of albedo were tested by a double pyranometer outdoors, which include solar radiation intensity, height of pyranometer, incident angle, and surrounding conditions. A new albedometer for laboratory testing of albedo and internal temperature was developed to overcome the negative effects of field measurements. Six common colored pavement materials were tested and compared with cement concrete and asphalt mixture. Results show that solar incident intensity and incident angle had great influence on the field measurement of albedo. The greater the intensity and incident angle were, the greater the measured albedo was. The albedo of red, yellow, blue, and green pavement materials was 20%-25%, which was higher than that of open-graded asphalt mixture (5.8%), dense-graded asphalt mixture (5.4%), and porous cement concrete (16%), and slightly lower than that of dense cement concrete (32%). Under the same radiation conditions, the internal temperature of the colored pavement material was generally lower than that of asphalt mixture and porous cement concrete, whereas green pavement materials had the best cooling effect.

    Reference
    Related
    Cited by
Get Citation
Related Videos

Share
Article Metrics
  • Abstract:
  • PDF:
  • HTML:
  • Cited by:
History
  • Received:February 26,2019
  • Revised:
  • Adopted:
  • Online: August 11,2020
  • Published:
Article QR Code