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Abstract:
Based on field tests, the early-age temperature of cement concrete pavement was analysed firstly. Then combining existing studies and construction technique, models and parameters of hydration heat evolution, environment and heat exchange were selected. Using heat transfer theory and the finite difference method, a numerical simulation program of early-age temperature for cement concrete pavements is developed. The program can consider cement concrete material characteristics and construction technology in China. Then spot meteorological monitoring, temperature survey tests of early-age and long-term for full-size pavements and small slab experiments in the lab testified the program's applicability respectively. The parameter sensibility analyzed by the program shows that primary factors affecting early-age temperature of pavements are material structure parameters, ambient parameters, maintaining methods, paving time, concrete placement temperature, solar absorptivity and thermal conductivity which affect obviously by early age. It is recommended to study and modify the concrete hydration heat evolution model as well as the influence of admixture component on hydration time parameter and hydration slope parameter.
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Engineering Mechanics
ISSN: 1000-4750
CN: 11-2595/O3
Year: 2013
Issue: 4
Volume: 30
Page: 175-183
Cited Count:
SCOPUS Cited Count: 11
ESI Highly Cited Papers on the List: 0 Unfold All
WanFang Cited Count:
Chinese Cited Count:
30 Days PV: 3
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