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Materials 2017, 10(4), 419;

Self-Developed Testing System for Determining the Temperature Behavior of Concrete

Department of Hydraulic engineering, Tsinghua University, Beijing 100084, China
Author to whom correspondence should be addressed.
Academic Editor: Ming Hu
Received: 9 February 2017 / Revised: 9 April 2017 / Accepted: 11 April 2017 / Published: 16 April 2017
(This article belongs to the Special Issue Thermal Sciences and Thermodynamics of Materials)
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Cracking due to temperature and restraint in mass concrete is an important issue. A temperature stress testing machine (TSTM) is an effective test method to study the mechanism of temperature cracking. A synchronous closed loop federated control TSTM system has been developed by adopting the design concepts of a closed loop federated control, a detachable mold design, a direct measuring deformation method, and a temperature deformation compensation method. The results show that the self-developed system has the comprehensive ability of simulating different restraint degrees, multiple temperature and humidity modes, and closed-loop control of multi-TSTMs during one test period. Additionally, the direct measuring deformation method can obtain a more accurate deformation and restraint degree result with little local damage. The external temperature deformation affecting the concrete specimen can be eliminated by adopting the temperature deformation compensation method with different considerations of steel materials. The concrete quality of different TSTMs can be guaranteed by being vibrated on the vibrating stand synchronously. The detachable mold design and assembled method has greatly overcome the difficulty of eccentric force and deformation. View Full-Text
Keywords: concrete; thermal behavior; mechanical behavior; cracking; temperature stress testing machine (TSTM) concrete; thermal behavior; mechanical behavior; cracking; temperature stress testing machine (TSTM)

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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

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Zhu, H.; Li, Q.; Hu, Y. Self-Developed Testing System for Determining the Temperature Behavior of Concrete. Materials 2017, 10, 419.

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