Effect of high temperature on mechanical properties of polyethylene fibre-calcium carbonate whisker engineered cementitious composites

被引：1

作者：

Zhang, Xutao ^{[1
]}

Lyu, Xikuan ^{[1
]}

Zhang, Xuwei ^{[2
]}

Lou, Chao ^{[1
]}

机构：

[1] Liaocheng Univ, Sch Architecture & Civil Engn, Liaocheng 252059, Peoples R China

[2] Shandong Huake Planning Architectural Design Co L, Liaocheng 252000, Shandong, Peoples R China

来源：

DEVELOPMENTS IN THE BUILT ENVIRONMENT | 2024年 / 18卷

关键词：

Engineered cementitious composites; High temperature; Mechanical properties; Polyethylene fibers; Calcium carbonate whiskers; Microstructure; OIL-WELL CEMENT; BEHAVIOR;

D O I：

10.1016/j.dibe.2024.100462

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

The mechanical properties of polyethylene fibre reinforced cementitious composites (PE-ECC) and polyethylene fibre-calcium carbonate whisker reinforced cementitious composites (PECW-ECC) were tested after exposure to different temperatures. And the microstructure changes of ECCs were observed by scanning electron microscope. The results showed the compressive and tensile strengths of PE-ECC and PECW-ECC tended to increase and then decrease with the increase of exposure temperature. The incorporation of CW improved the mechanical properties of PE-ECC to a certain extent. At the same exposure temperature, the compressive and tensile strengths of PECW-ECC are better than that of PE-ECC, and the plastic deformation capacity is also better than that of PEECC. The reason is that CW can be tightly bonded with the matrix material, and it has a filling effect on matrix defects, a bridging effect on the microscopic cracks, and a deflecting effect on the microscopic cracks.

引用

页数：11

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