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A platform for research: civil engineering, architecture and urbanism
Effect of Coarse Aggregate on Coefficient of Thermal Expansion of Road Concrete
This paper introduces an approach to determine the coefficient of thermal expansion (CTE) of road concrete using an optical lever system using CTE of 144 concrete specimens. The coarse aggregate in these specimens contains 8 kinds of stones from 19 origins. Measured data was satisfactorily verified by AASHTO TP60. The results showed that CTE of road concrete was between 4.76×10-6/ °C and 12.1×10-6/ °C and that coarse aggregate type had a great influence on CTE. When aggregate content was equivalent, the higher CTE of the aggregate, the higher CTE of concrete contained that aggregate. The sensitivity of concrete for different temperature ranges and the same temperature gradient had no significant difference, such as 20 °C to 30 °C and 30 °C to 40 °C. Meanwhile, the amount of concrete expanded when the temperature increment was equal with concrete shrinkage when temperature reduces.
Effect of Coarse Aggregate on Coefficient of Thermal Expansion of Road Concrete
This paper introduces an approach to determine the coefficient of thermal expansion (CTE) of road concrete using an optical lever system using CTE of 144 concrete specimens. The coarse aggregate in these specimens contains 8 kinds of stones from 19 origins. Measured data was satisfactorily verified by AASHTO TP60. The results showed that CTE of road concrete was between 4.76×10-6/ °C and 12.1×10-6/ °C and that coarse aggregate type had a great influence on CTE. When aggregate content was equivalent, the higher CTE of the aggregate, the higher CTE of concrete contained that aggregate. The sensitivity of concrete for different temperature ranges and the same temperature gradient had no significant difference, such as 20 °C to 30 °C and 30 °C to 40 °C. Meanwhile, the amount of concrete expanded when the temperature increment was equal with concrete shrinkage when temperature reduces.
Effect of Coarse Aggregate on Coefficient of Thermal Expansion of Road Concrete
Zhang, Yan-Cong (author) / Gao, Ling-Ling (author)
17th COTA International Conference of Transportation Professionals ; 2017 ; Shanghai, China
CICTP 2017 ; 1258-1265
2018-01-18
Conference paper
Electronic Resource
English
| British Library Online Contents | 2018