Journal Published Online: 22 October 2024
Volume 52, Issue 6

Dynamic Mechanical Properties of PVA Fiber-Reinforced Concrete after Freeze-Thaw Cycles

CODEN: JTEVAB

Abstract

Concrete structures have been employed in a multitude of low- and even ultra–low-temperature environments, necessitating that these structures exhibit a certain degree of impact and explosion resistance in addition to the capacity to withstand the elevated temperatures induced by the low-temperature environment and the additional load. In this study, the dynamic mechanical properties of polyvinyl alcohol (PVA) fiber-reinforced concrete were investigated under freeze-thaw cycles at temperatures ranging from 20°C to −70°C. The research employed a split-Hopkinson pressure bar with a diameter of 75 mm. The findings revealed that the PVA fibers were randomly dispersed within the concrete matrix, exhibiting a superior bridging effect, effectively supporting the tensile stress generated by the impact. The impact toughness of concrete exhibited a biphasic response to the addition of PVA fiber admixture. Initially, the toughness increased with increasing fiber content, reaching a peak at 1.2 kg/m3. Subsequently, the toughness decreased with further increases in fiber content. The incorporation of PVA fibers significantly enhanced the energy absorption capacity of the concrete at freeze-thaw cycles between 20°C and −70°C.

Author Information

Zhang, Bing
School of Materials Science and Engineering, Shenyang Ligong University, Shenyang, China
Liu, Jun
School of Materials Science and Engineering, Shenyang Ligong University, Shenyang, China
Jiang, Ting
No. 52 Institute of China North Industries Group, Yantai, China
Yang, Yuanquan
School of Materials Science and Engineering, Shenyang Ligong University, Shenyang, China
Pages: 10
Price: $25.00
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Details
Stock #: JTE20240052
ISSN: 0090-3973
DOI: 10.1520/JTE20240052