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Influence of flexural loading and chloride exposure on the fatigue behavior of high-performance lightweight engineered cementitious composites
被引:30
作者:
Guo, Menghuan
[1
]
Zhong, Qianli
[1
]
Zhou, Yingwu
[1
]
Hu, Biao
[1
]
Huang, Zhenyu
[1
]
Yue, Yanchao
[1
]
机构:
[1] Shenzhen Univ, Guangdong Prov Key Lab Durabil Marine Civil Engn, Shenzhen 518060, Guangdong, Peoples R China
基金:
中国国家自然科学基金;
关键词:
High-performance lightweight engineered cementitious composites;
Flexural fatigue;
Chloride exposure;
Strength;
Fatigue life;
Failure;
HIGH-STRENGTH;
MECHANICAL-PROPERTIES;
MULTIPLE CRACKING;
REPAIR-MATERIAL;
CONCRETE;
DURABILITY;
SHCC;
POLYETHYLENE;
CENOSPHERE;
POLYMER;
D O I:
10.1016/j.conbuildmat.2020.118512
中图分类号:
TU [建筑科学];
学科分类号:
0813 ;
摘要:
The flexural fatigue behavior of high-performance lightweight engineered cementitious composites (HPLW-ECC) with tensile strength of 7.16 MPa and tensile strain capacity of 8.91% was investigated. The flexural repetitive loading demonstrated a pronounced influence on the fiber bridging capacity of HPLW-ECC. In contrast, the multiple cracking characteristics of HPLW-ECC under chloride exposure were maintained though its fatigue life decreased. The low-density HPLW-ECC exhibited high resistance to chloride penetration, and the fiber bridging capacity remained almost intact. Moreover, the flexural fatigue performance of HPLW-ECC possessing higher strength was comparable to that of conventional lightweight ECC. A fatigue life prediction model was proposed, and the model's failure probability was discussed based on the probabilistic reliability analyses. (C) 2020 Elsevier Ltd. All rights reserved.
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页数:11
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