RESEARCH ARTICLE


Experimental Research on the Hydration Heat Temperature Field of Hollow Concrete Piers



Jun Peng1, Chunping Tang*, 2, Liangliang Zhang3, Ayad Thabit Saeed
1 Chongqing Vocational Institute of Engineering, Chongqing 402260, China
2 Chongqing Technology and Business Insti-tute, Chongqing 400052, China
3 College of Civil Engineering, Chongqing University, Chongqing 400045, China
4 T.Y.Lin International Engineering Consulting Co., Ltd, Chongqing 401121, China


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Creative Commons License
© 2014 Peng et al;

open-access license: This is an open access article distributed under the terms of the Creative Commons Attribution 4.0 International Public License (CC-BY 4.0), a copy of which is available at: https://creativecommons.org/licenses/by/4.0/legalcode. This license permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

* address correspondence to this author at the No.1, Hua long Avenue, Jiulongpo District, Chongqing, Chongqing Technology and Business Institute, Tel: +8602368465120; Chongqing 400052, China; E-mail: tcp501@163.com


Abstract

Measuring points were observed continuously to reveal the hydration heat temperature distribution of hollow concrete bridge pier. The results showed that as the thickness of the pier increased, the central temperature of the pier increased significantly due to hydration and the heat was difficult to be dissipated. The hydration temperature accounted for up to 70% of the maximum temperature rise during 20 h and reached the maximum temperature at 24 h after pouring the concrete. There was a jump value between the central temperature and surface temperature in a short period after removing the framework. The jumping was the most dangerous moment for the cracking of pier surfaces. Therefore, the formwork removal time has to be determined prudently and corresponding measures have to be conducted to reduce the possibility of pier surface cracking.

Keywords: Hollow concrete pier, hydration, temperature field, experiment.