Dynamic Mechanical Properties of Steel-Basalt Hybrid Fiber Concrete after High Temperature

doi:10.16552/j.cnki.issn1001-1625.2024.0731

Abstract

Abstract: In order to study the influence of high temperature on the dynamic mechanical properties of steel-basalt hybrid fiber reinforced concrete (HFRC), a φ50 mm split Hopkinson pressure bar (SHPB) system was used to carry out dynamic compression and dynamic splitting experiments on steel fiber reinforced concrete (SFRC), basalt fiber reinforced concrete (BFRC), and hybrid fiber reinforced concrete at different temperatures (25, 100, 200, 400, 600, 800 ℃). The volume content of steel fiber and basalt fiber was 1% and 0.2%, respectively. The dynamic stress-strain process under different temperature conditions was obtained. The corresponding dynamic compressive strength, dynamic splitting strength and peak strain were obtained. The results show that the residual mechanical properties of specimens can be ensured at high temperature by adding basalt fiber, and the dynamic splitting tensile strength of specimens can be improved obviously by adding steel fiber. Temperature damage softening has an important effect on the mechanical properties of concrete. The addition of steel fiber and basalt fiber can effectively relieve the deterioration of high temperature, and steel-basalt hybrid fiber concrete exhibits better mechanical properties under normal and high temperature conditions.

Key words: steel-basalt hybrid fiber, concrete, dynamic compressive strength, dynamic splitting strength, split Hopkinson pressure bar, high temperature

CLC Number:

TU528

RAN Qiushuo, XU Zehui, QI Wenchao, LIU Lei. Dynamic Mechanical Properties of Steel-Basalt Hybrid Fiber Concrete after High Temperature[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2025, 44(1): 69-80.

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