[1] Chai Lijuan, Guo Liping, , et al. Effects of curing age on compressive and tensile stress-strainbehaviors of ecological high ductility cementitious composites [J]. Journal of Southeast University (English Edition), 2020, 36 (1): 73-80. [doi:10.3969/j.issn.1003-7985.2020.01.010]

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Effects of curing age on compressive and tensile stress-strainbehaviors of ecological high ductility cementitious composites()

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

Volumn:

36

Issue:

2020 1

Page:

73-80

Research Field:

Materials Sciences and Engineering

Publishing date:

2020-03-20

Info

Title:

Effects of curing age on compressive and tensile stress-strainbehaviors of ecological high ductility cementitious composites

Author(s):

Chai Lijuan¹;  Guo Liping¹;  2;  3;  Chen Bo⁴;  Cao Yuanzhang¹

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

Keywords:

ecological high ductility cementitious composites(Eco-HDCC);  compressive stress-strain behavior;  tensile stress-strain behavior;  curing age;  reaction degree;  non-evaporable water content;  pH value in pore solution

PACS:

TU528

DOI:

10.3969/j.issn.1003-7985.2020.01.010

Abstract:

To obtain the design parameters of the structure made by ecological high ductility cementitious composites(Eco-HDCC), the effects of curing age on the compressive and tensile stress-strain relationships were studied. The reaction degree of fly ash, non-evaporable water content and the pH value in pore solution were calculated to reveal the mechanical property. The results indicate that as the curing age increases, the peak compressive strength, peak compressive strain and ultimate tensile strength of Eco-HDCC increase. However, the ultimate compressive strain and ultimate tensile strain of Eco-HDCC decrease with the increase in curing age. Besides, as the curing age increases, the reaction degree of fly ash and non-evaporable water content in Eco-HDCC increase, while the pH value in the pore solution of Eco-HDCC decreases. Finally, the simplified compressive and tensile stress-strain constitutive relationship models of Eco-HDCC with a curing age of 28 d were suggested for the structure design 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 Foundations of China(No. 51778133), the Transportation Science & Technology Project of Fujian Province(No.2017Y057), the China Railway Project(No.2017G007-C), Foundation of the China Scholarship Council(No.201906090163).
Citation: Chai Lijuan, Guo Liping, Chen Bo, et al. Effects of curing age on compressive and tensile stress-strain behaviors of ecological high ductility cementitious composites.[J].Journal of Southeast University(English Edition), 2020, 36(1):73-80.DOI:10.3969/j.issn.1003-7985.2020.01.010.

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