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[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()
冻融-碳化交互作用和碳化作用下 生态高延性水泥基复合材料的拉伸行为
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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
冻融-碳化交互作用和碳化作用下 生态高延性水泥基复合材料的拉伸行为
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
柴丽娟1;  郭丽萍1;  2;  3;  陈波4;  汤永健1;  费香鹏1
1东南大学材料科学与工程学院, 南京 211189; 2东南大学江苏省先进土木工程材料协同创新中心, 南京 211189; 3东南大学江苏省土木工程材料重点实验室, 南京 211189; 4南京水利科学研究院水文水资源与水利工程科学国家重点实验室, 南京 210029
Keywords:
ecological high ductility cementitious composites(Eco-HDCC);  interaction cycle;  single carbonation;  carbona-tion front;  tensile stress-strain curve;  tensile strain energy
生态高延性水泥基复合材料;  交互次数;  单一碳化;  碳化前沿;  拉伸应力-应变曲线;  拉伸应变能
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.
为了探究生态高延性水泥基复合材料(Eco-HDCC)在桥面连接板结构设计中所需的拉伸性能, 试验研究了冻融碳化交互作用与单一碳化作用对Eco-HDCC拉伸性能的影响, 并采用X射线衍射和差热热重方法确定Eco-HDCC经历不同交互作用次数和单一碳化作用后的碳化前沿.结果表明:与单一碳化作用相比, 经历冻融-碳化交互作用后Eco-HDCC的碳化前沿较大;与未经历交互作用的试块相比, 经历1~5次交互作用后Eco-HDCC的极限拉伸强度呈增加趋势, 经历10~15次交互作用后Eco-HDCC的极限拉伸强度降低, 但在单一碳化作用下Eco-HDCC的极限拉伸强度随碳化次数的增加而增加;在交互作用和单一碳化作用下, Eco-HDCC的极限拉伸应变和拉伸应变能均随交互次数或碳化次数的增加呈现降低趋势, 但交互作用下Eco-HDCC的极限拉伸应变和应变能降低程度较明显.在桥面连接板设计中, 考虑一定的安全裕度, 可采用经历15次冻融碳化交互作用后Eco-HDCC的拉伸性能关系曲线进行结构设计.

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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.
Last Update: 2019-09-20