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Open AccessArticle

Evaluation of the Thermal and Shrinkage Stresses in Restrained High-Performance Concrete

1
College of Civil Engineering and Architecture, Zhejiang University of Technology, Hangzhou 310023, China
2
Key Laboratory of Civil Engineering Structures & Disaster Prevention and Mitigation Technology of Zhejiang Province, Zhejiang University of Technology, Hangzhou 310023, China
3
Huzhou Southern Taihu Lake Design Institute of Water Conservancy & Hydro-electric Power Co., Ltd., Huzhou 313000, China
*
Author to whom correspondence should be addressed.
Materials 2019, 12(22), 3680; https://doi.org/10.3390/ma12223680 (registering DOI)
Received: 23 September 2019 / Revised: 29 October 2019 / Accepted: 5 November 2019 / Published: 8 November 2019
(This article belongs to the Special Issue Concrete and Construction Materials)
The early age volume deformation is the main course for the cracking of high-performance concrete (HPC). Hence, the shrinkage behavior and the restrained stress development of HPC under different restraints and curing conditions were experimentally studied in this paper. The method to separate the stress components in the total restraint stress was proposed. The total restrained stress was separated into autogenous shrinkage stress, drying shrinkage stress and thermal stress. The results showed that the developments of the free shrinkage (autogenous shrinkage and drying shrinkage) and the restrained stress were accelerated when the drying began; but the age when the drying began did not significantly influence the long-term shrinkage and restrained stress of HPC; the autogenous shrinkage stress continuously contributed to the development of the total restrained stress in HPC; the drying shrinkage stress developed very rapidly soon after the drying began; and the thermal stress was generated when the temperature dropped. The thermal stress was predominant at the early age, but the contributions of the three stresses to the total restrained stress were almost the same at the age of 56 d in this study. View Full-Text
Keywords: high performance concrete; restrained stress; autogenous shrinkage; drying shrinkage; thermal stress high performance concrete; restrained stress; autogenous shrinkage; drying shrinkage; thermal stress
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MDPI and ACS Style

Yang, Y.; Ma, L.; Huang, J.; Gu, C.; Xu, Z.; Liu, J.; Ni, T. Evaluation of the Thermal and Shrinkage Stresses in Restrained High-Performance Concrete. Materials 2019, 12, 3680.

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