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
来源：
CONSTRUCTION AND BUILDING MATERIALS | 2020年 / 249卷
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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