Experimental study on mechanical properties and microscopic analysis of basalt-polypropylene hybrid fiber reinforced concrete
DOI:
https://doi.org/10.3989/mc.2025.388224Keywords:
Basalt fiber, Polypropylene fiber, Hybrid fiber, Mechanical properties, Microstructure analysisAbstract
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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Funding data
Natural Science Foundation of Zhejiang Province
Grant numbers LQ22E080024
Natural Science Foundation of Liaoning Province
Grant numbers JJL201915404
Department of Education of Zhejiang Province
Grant numbers Y202146776








