Field Monitoring and Analysis of Reinforcement Concrete Slab

Abstract:

Concrete deformation measured under a certain condition in the experiment are very different from those in practical engineering structures, therefore, its necessary to monitor concrete properties in structures. In the paper, by real-time continuous monitoring of reinforcement concrete slab prepared with expansive agent, time-dependent temperature variations and strain variations are obtained and analyzed, and indoor test of the mechanical properties and deformation of field sampling from the slab are presented, so that this completes a transition from the specimen in experiment to the structure in engineering. The result shows that: there was no early-age crack in the four month after casting; the temperature had a certain increase due to heat generation of cement, which can lead to shrinkage deformation in cooling period; the temperature fluctuate with ambient temperature and there are obvious peak temperature rise about 15°C; There was a certain expansion at heating period, which can be considered as compensating shrinkage caused at late age in a certain extent so that minimum strain value is just about-120με which are not beyond the ultimate tensile strain. In addition, the measured experimental data can provide helpful reference for early crack control and durability of concrete structure, and they can also be use to verify and improve the accuracy of the numerical results for slab, which is available in the future for basis to similar projects and research.

• Periodical: Applied Mechanics and Materials (Volumes 351-352)
• Pages: 1217-1221
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.351-352.1217
• Online since: August 2013
• Authors: Ting Yao, Qian Tian, Shou Zhi Zhang, Fei Guo, Yu Jiang Wang
• Keywords: Concrete Slab, Cracking, Expansive Agent, Field Monitoring, Strain, Temperature

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