An Approach to Determine the Coefficient of Thermal Expansion of Road Concrete Using Optical Lever

DOI

10.2991/aece-16.2017.85How to use a DOI?

Keywords

coefficient of thermal expansion; road concrete; measurement approach optical lever; aggregate

Abstract

The approach to determine the coefficient of thermal expansion (CTE) of road concrete using optical lever system was introduced. CTE of 144 concrete specimens was determined with it. The coarse aggregate in these specimens contains 8 kinds of stones from 19 origins. Measured data was satisfactory verified by AASHTO TP60. The results showed that: CTE of road concrete was between 4.76ž10-6/?C and 12.1ž10-6/?C. 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 has no significant difference, such as 20?C to 30?C and 30?C to 40?C. Meanwhile, amount of concrete expanse when temperature increment was equal with concrete shrinkage when temperature reduction.

Copyright

© 2017, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Lingling GAO
PY  - 2016/12
DA  - 2016/12
TI  - An Approach to Determine the Coefficient of Thermal Expansion of Road Concrete Using Optical Lever
BT  - Proceedings of the 2016 International Conference on Architectural Engineering and Civil Engineering
PB  - Atlantis Press
SP  - 386
EP  - 389
SN  - 2352-5401
UR  - https://doi.org/10.2991/aece-16.2017.85
DO  - 10.2991/aece-16.2017.85
ID  - GAO2016/12
ER  -