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Mechanical Properties of High-Strength Concrete Reinforced with Hybrid Basalt-Polypropylene Fibers under Dynamic Compression and Split Tension

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dc.contributor.authorShi, F.
dc.contributor.authorPham, T.M.
dc.contributor.authorHao, H.
dc.date.issued2024
dc.description.abstractFiber reinforcement has been widely used to improve the performance of concrete under different types of loading. Among various types of fibers, a combination of fiber types, namely hybrid fibers, has been shown to be more effective due to the combined features of different types of fibers. However, the dynamic performance of hybrid fiber-reinforced concrete (FRC) has been rarely studied. Recently, a new type of hybrid, consisting of 1% low Young’s modulus macro polypropylene (PP) fibers and 0.1% high Young’s modulus micro basalt fibers, has been proposed, showing improved static mechanical properties compared with traditional FRC. In this study, the dynamic compressive and splitting tensile properties of this new basalt-macro PP hybrid FRC with varying fiber volume dosages were investigated by using split the Hopkinson pressure bar (SHPB). Experimental results showed that the basalt–macro polypropylene hybrid FRC exhibits superior impact resistance compared with plain concrete under both dynamic compression and splitting tension. The hybrid FRC showed less crack initiation and propagation, a ductile failure pattern, and smaller crack opening displacement. The sensitivity of the concrete to strain rate was found to be more significant for 1% hybrid FRC under dynamic compression and 2% hybrid FRC under dynamic splitting tensile tests. Based on the test results, empirical formulas were derived to describe the dynamic increase factor (DIF) versus strain rate for both dynamic compressive and tensile strength of hybrid FRC.
dc.identifier.citationJournal of Materials in Civil Engineering, 2024; 36(8):1-16
dc.identifier.doi10.1061/JMCEE7.MTENG-17457
dc.identifier.issn0899-1561
dc.identifier.issn1943-5533
dc.identifier.orcidPham, T.M. [0000-0003-4901-7113]
dc.identifier.urihttps://hdl.handle.net/11541.2/39153
dc.language.isoen
dc.publisherAmerican Society of Civil Engineers (ASCE)
dc.relation.fundingARC FL180100196 Laureate Fellowships
dc.relation.granthttp://purl.org/au-research/grants/arc/FL 180100196
dc.rightsCopyright 2022 ASCE Access Condition Notes: Accepted manuscript available open access
dc.source.urihttps://doi.org/10.1061/jmcee7.mteng-17457
dc.subjectdynamic compressive strength
dc.subjectdynamic splitting tensile strength
dc.subjecthybrid fiber-reinforced concrete (FRC)
dc.subjectsplit Hopkinson pressure bar (SHPB)
dc.titleMechanical Properties of High-Strength Concrete Reinforced with Hybrid Basalt-Polypropylene Fibers under Dynamic Compression and Split Tension
dc.typeJournal article
pubs.publication-statusPublished
ror.fileinfo12288100380001831 13288090360001831 Open Access Postprint
ror.mmsid9916864323601831

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