Experimental study on mechanical properties and microscopic analysis of basalt-polypropylene hybrid fiber reinforced concrete

Authors

DOI:

https://doi.org/10.3989/mc.2025.388224

Keywords:

Basalt fiber, Polypropylene fiber, Hybrid fiber, Mechanical properties, Microstructure analysis

Abstract


In this paper, the effects of basalt fiber aspect ratio (BFA), basalt fiber content (BFC) and polypropylene fiber content (PFC) on the basic mechanical properties of basalt-polypropylene hybrid fiber reinforced concrete (BPHFRC) were studied by orthogonal test. Furthermore, the failure mode of concrete were examined by scanning electron microscope (SEM). The results show that mixing BF and PF leads to a positive hybrid effect, and the impact of BFC is the most significant. The cubic compressive and axial compressive strengths decrease with increased BFC. The combination of A2B1C2 (BFA=800, BFC=0.1%, PFC=0.15%) increased the cubic compressive and axial compressive strengths by 13.73% and 23.54%, respectively. The combination of A2B2C3 (BFA=800, BFC=0.15%, PFC=0.2%) increased the splitting tensile and flexural strengths by 32.96% and 38.88%. The strength prediction models are reliable. SEM observed that fiber bridging prevented crack initiation and growth.

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Published

2025-09-30

How to Cite

Huang, Y., Liu, H., & Liu, G. (2025). Experimental study on mechanical properties and microscopic analysis of basalt-polypropylene hybrid fiber reinforced concrete. Materiales De Construcción, 75(359), e389. https://doi.org/10.3989/mc.2025.388224

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