Experimental study on residual mechanical properties of steel-PVA hybrid fiber high performance concrete after high temperature

被引：5

作者：

Xu, Qiqi ^{[1
]}

Jiang, Xuepeng ^{[1
]}

Zhang, Zhiyun ^{[2
]}

Xu, Chengxiang ^{[1
,3
]}

Zhang, Jicheng ^{[2
]}

Zhou, Bowen ^{[2
]}

Hang, Wenjie ^{[2
]}

Zheng, Zezhong ^{[2
]}

机构：

[1] Wuhan Univ Sci & Technol, Sch Resources & Environm Engn, Wuhan 430081, Peoples R China

[2] Yangtze Univ, Sch Urban Construct, Jingzhou 434023, Peoples R China

[3] Hubei Prov Engn Res Ctr Urban Regenerat, Wuhan 430065, Peoples R China

来源：

CONSTRUCTION AND BUILDING MATERIALS | 2025年 / 458卷

基金：

中国国家自然科学基金;

关键词：

Steel-PVA hybrid fibers; High performance concrete; High temperature; Mechanical properties; Strength prediction models; POLYVINYL-ALCOHOL PVA; BEHAVIOR;

D O I：

10.1016/j.conbuildmat.2024.139735

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

In order to investigate the effects of steel fibers, poly vinyl alcohol (PVA) fibers, and mineral powder on the residual mechanical properties of steel-PVA hybrid fiber high-performance concrete (HFHPC) after high temperature, orthogonal experiments were designed to test the cube compressive strength, splitting tensile strength, and flexural strength of HFHPC after being subjected to high temperature, and range and variance analysis were conducted. The results showed that a steel fiber volume fraction of 2.0 % could effectively improve the various strengths of HFHPC. When the volume fraction of PVA fibers is 0.3 %, it can significantly improve the flexural strength as well as the cracking resistance of the concrete, and the residual compressive strength and residual split tensile strength of the HFHPC reach the highest when the mineral powder mixing amount is 10 %. It was also found that when the three act synergistically, the concrete numbered S2P0.3M10 and S1.5P0.3M130 performed best at room temperature as well as after.

引用

页数：18

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