Influence of environmental factors on temperature differential in high performance cement concrete pavements

Daily and seasonal variations in temperature and moisture are important factors influencing the functioning of concrete pavements. In addition to temperature, other environmental factors that affect rigid pavement performance include humidity, precipitation, amount of solar radiation, etc. This paper is part of a comprehensive study on High Performance Cement Concrete Pavements (HPCCPs) conducted at Bangalore University. Amongst the HPCs, an approach is made in this paper to determine the realistic temperature differential in High Volume Fly Ash Concrete (HVFAC). Durability tests, such as abrasion, water absorption and flexural fatigue were conducted on HVFAC in addition to compressive and static flexural strength tests. The test results show that the HVFAC is a high performance concrete. A HVFAC concrete slab is instrumented with thermocouples, for monitoring temperature at three regions - interior, edge and corner. Thermocouples are inserted at top, middle and bottom of the slab. The variation in pavement temperature is recorded every hour for seven days. The influence of climatic conditions, such as humidity and number of solar radiation hours on daily and seasonal variations (summer, winter and monsoon) of temperature differential through the slab thickness is investigated. The minimum top temperatures during summer, winter and monsoon seasons were 22.8°C, 21.30°C and 21.10°C, respectively. The maximum top temperatures during summer, winter and monsoon seasons were 53.9°C, 42.30°C, 13°C and 8.80°C, respectively. The maximum temperature differentials observed during summer, winter and monsoon season were 13.5°C, 13°C and 8.80°C, respectively. Taking into account the local environmental factors and the material properties, temperature differential prediction models for HVFAC slabs are suggested in this paper. The temperature differential at any location in India can be obtained by developing similar prediction models and substituting values of the environmental parameters in the prediction models. The values of these parameters are available from Indian Meteorological Department. Temperature stresses are evaluated by using the classic Westergaard equations.

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  • Supplemental Notes:
    • Abstract reprinted with permission from the publisher.
  • Authors:
    • Kumar, K S Suresh
    • Amarnath, M S
    • Avinash, G B
  • Publication Date: 2013-5

Language

  • English

Media Info

  • Media Type: Print
  • Features: Figures; Photos; References; Tables;
  • Pagination: pp 17-23
  • Serial:
    • Indian Highways
    • Volume: 41
    • Issue Number: 5
    • Publisher: Indian Roads Congress
    • ISSN: 0376-7256

Subject/Index Terms

Filing Info

  • Accession Number: 01483055
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Jun 3 2013 10:43AM