[1] Chai Lijuan, Guo Liping, , et al. Tensile behaviors of ecological high ductility cementitious compositesexposed to interactive freeze-thaw-carbonation and single carbonation [J]. Journal of Southeast University (English Edition), 2019, 35 (3): 367-373. [doi:10.3969/j.issn.1003-7985.2019.03.013]

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Tensile behaviors of ecological high ductility cementitious compositesexposed to interactive freeze-thaw-carbonation and single carbonation()

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Journal of Southeast University (English Edition)[ISSN:1003-7985/CN:32-1325/N]

Volumn:

35

Issue:

2019 3

Page:

367-373

Research Field:

Materials Sciences and Engineering

Publishing date:

2019-09-30

Info

Title:

Tensile behaviors of ecological high ductility cementitious compositesexposed to interactive freeze-thaw-carbonation and single carbonation

Author(s):

Chai Lijuan¹;  Guo Liping¹;  2;  3;  Chen Bo⁴;  Tang Yongjian¹;  Fei Xiangpeng¹

¹School of Materials Science and Engineering, Southeast University, Nanjing 211189, China
²Jiangsu Key Laboratory of Construction Materials, Southeast University, Nanjing 211189, China
³Collaborative Innovation Center for Advanced Civil Engineering Materials, Southeast University, Nanjing 211189, China
⁴State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Nanjing Hydraulic Research Institute, Nanjing 210029, China

Keywords:

ecological high ductility cementitious composites(Eco-HDCC);  interaction cycle;  single carbonation;  carbona-tion front;  tensile stress-strain curve;  tensile strain energy

PACS:

TU528

DOI:

10.3969/j.issn.1003-7985.2019.03.013

Abstract:

To explore the tensile property parameters in the structural design of bridge deck link slabs made by ecological high ductility cementitious composites(Eco-HDCC), the tensile properties of Eco-HDCC exposed to interactive freeze-thaw-carbonation cycles and single carbonation cycles were studied. The carbonation front of Eco-HDCC was determined by X-ray diffraction and differential scanning calorimetry-thermal gravimetric methods. Results indicate that the carbonation front of Eco-HDCC after interaction tests is deeper than that of Eco-HDCC after single carbonation tests. In addition, the ultimate tensile strength for Eco-HDCC shows an increasing trend after the interaction of 1 to 5 cycles compared with that of virgin specimens, while the ultimate tensile strength decreases after the interaction of 10 to 15 cycles. For single carbonation tests, the ultimate tensile strength of Eco-HDCC increases as cycles increase. After being subjected to interaction and single carbonation environments, both the ultimate tensile strain and tensile strain energy of Eco-HDCC decrease as cycles increase, and the decrease degrees of Eco-HDCC after interaction cycles are larger than those of Eco-HDCC after single carbonation. For general consideration, the tensile stress-strain relationship of Eco-HDCC after the interaction of 15 cycles can be adopted in the design of bridge deck link slabs for the purpose of safety.

References:

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Memo

Memo:

Biographies: Chai Lijuan(1991—), female, Ph.D. candidate; Guo Liping(corresponding author), female, doctor, associate professor, guoliping691@163.com.
Foundation items: The National Natural Science Foundation of China(No. 51778133), the National Basic Research Program of China(973 Program)(No. 2015CB655102), the Fundamental Research Funds for the Central Universities(No.3212009403), the China Railway Project(No.2017G007-C).
Citation: Chai Lijuan, Guo Liping, Chen Bo, et al. Tensile behaviors of ecological high ductility cementitious composites exposed to interactive freeze-thaw-carbonation and single carbonation[J].Journal of Southeast University(English Edition), 2019, 35(3):367-373.DOI:10.3969/j.issn.1003-7985.2019.03.013.

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