Effect of Ambient Temperature on the Mechanical Properties of High Ductility Concrete
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Published:2023-03-20
Issue:6
Volume:16
Page:2465
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ISSN:1996-1944
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Container-title:Materials
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language:en
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Short-container-title:Materials
Author:
Chai Lijuan12, Chen Bo3, Guo Liping4, Ren Biaokun1, Chen Zhichun5, Huang Tianyong2
Affiliation:
1. College of Civil Engineering, Taiyuan University of Technology, Taiyuan 030024, China 2. State Key Laboratory of Solid Waste Reuse for Building Materials, Beijing 100041, China 3. State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Nanjing Hydraulic Research Institute, Nanjing 210029, China 4. School of Materials Science and Engineering, Southeast University, Nanjing 211189, China 5. Technical Supervision and Research Center of the Building Materials Industry, Beijing 100024, China
Abstract
This study analyzes the mechanical properties of high ductility concrete (HDC) under different ambient temperatures to provide a parameter basis for the design of HDC bridge deck link slabs. Five temperatures (−30, 0, 20, 40, and 60 °C) were designed to investigate the compressive, tensile, and flexural properties of HDC after temperature treatment and analyze the pore structure. The results show that, compared with the HDC performance at room temperature (20 °C), the compressive strength, ultimate tensile strength, and flexural strength decreased after treatment at low temperatures (−30 and 0 °C), while the strength increased after treatment at high temperatures (40 and 60 °C). After experiencing low- and high-temperature treatments, the ultimate tensile strain and ultimate deflection of the HDC increased. The tensile and flexural failures of the HDC exhibited multiple cracking, and the stress–strain/deflection curve showed a strain/deflection hardening stage. The tensile constitutive relationship can be simplified as a bilinear two-stage relationship. As the temperature increased, the porosity of harmless and less harmful pores in HDC gradually increased, while the porosity of harmful and more harmful pores gradually decreased, resulting in an increase in HDC strength. Based on the influence of temperature on HDC properties, design parameters for the HDC bridge deck link slab structure are proposed.
Funder
National Natural Science Foundation of China Shanxi Scholarship Council of China State Key Laboratory of Solid Waste Reuse for Building Materials Anhui Province Key Laboratory of Advanced Building Materials the Opening Fund of Key Laboratory of Building Safety and Energy Efficiency of Ministry of Education State Key Laboratory of High Performance Civil Engineering Materials Southeast University, Key Laboratory of Concrete and Pre-stressed Concrete Structures of Ministry of Education
Subject
General Materials Science
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