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Computers and Concrete Volume 24, Number 5, November 2019 , pages 437-444 DOI: https://doi.org/10.12989/cac.2019.24.5.437 |
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An automated control system for concrete temperature development in construction |
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Sheng Qiang, Xue-jun Leng, Xiang-rong Wang, Jing-tao Zhang and Xia Hua
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Abstract | ||
PLC and its expansion module, electric ball valve and cooling pipe, electric heating steel plate and various components of the system, which is used to control test and process data. By automatically adjusting the opening of the valve, the system makes the top temperature and cooling speed develop along the ideal temperature diachronic curve. Moreover, the system enables the temperature difference between inside and surface of test block limited in a given range by automatically controlling the surface board heating. The method of physical simulation test by sandbox with built-in cooling water pipe and heating rod is adopted. On the premise of a given standard value, the operation of the system is checked under different working conditions. Further, an extension of this system is proposed, which enables its application to obtain some thermal parameters when cooperating with numerical simulation. | ||
Key Words | ||
Programmable Logic Controller (PLC); automation; temperature control; concrete construction; concrete | ||
Address | ||
Sheng Qiang: College of Water Conservancy and Hydropower Engineering, Hohai University, 1 Xikang Road, 210098 Nanjing, China Xue-jun Leng: College of Water Conservancy and Hydropower Engineering, Hohai University, 1 Xikang Road, 210098 Nanjing, China Xiang-rong Wang: Huai-an Survey and Design Institute of Water Resources Co. Ltd, 9 Shenzhen Road, 223005 Huai-an, China Jing-tao Zhang: College of Water Conservancy and Hydropower Engineering, Hohai University, 1 Xikang Road, 210098 Nanjing, China Xia Hua: School of Mechanical Engineering, Purdue University, West Lafayette, Indiana 47907, USA | ||