{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,5]],"date-time":"2026-09-05T18:03:06Z","timestamp":1788631386888,"version":"build-2803163510"},"reference-count":46,"publisher":"MDPI AG","issue":"24","license":[{"start":{"date-parts":[[2024,12,22]],"date-time":"2024-12-22T00:00:00Z","timestamp":1734825600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"Ordos Science &amp; Technology Plan"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Materials"],"abstract":"<jats:p>This study examines the crack resistance of basalt-fiber-reinforced concrete (BFRC) materials subjected to freeze\u2013thaw cycles (FTCs). We utilized a \u03c650 mm Split Hopkinson Pressure Bar (SHPB) apparatus alongside numerical simulations to carry out impact compression tests at a velocity of 5 m\/s on BFRC specimens that experienced 0, 10, 20, and 30 FTCs. Additionally, we investigated the effects of basalt fiber (BF) orientation position and length on stress intensity factors. The results reveal that with an increasing number of FTCs, the dynamic crack propagation speed of BFRC with a prefabricated crack inclined at 0\u00b0 rises from 311.84 m\/s to 449.92 m\/s, while its pure I fracture toughness decreases from 0.6266 MPa\u00b7m0.5 to 0.4902 MPa\u00b7m0.5. For BFRC specimens with a prefabricated crack inclination of 15\u00b0, the dynamic crack propagation speed increases from 305.81 m\/s to 490.02 m\/s, accompanied by a reduction in mode I fracture toughness from 0.3901 MPa\u00b7m0.5 to 0.2867 MPa\u00b7m0.5 and mode II fracture toughness from 0.6266 MPa\u00b7m0.5 to 0.4902 MPa\u00b7m0.5. In the case of a prefabricated crack inclination of 28.89\u00b0, the dynamic crack propagation speed rises from 436.10 m\/s to 494.28 m\/s, while its pure mode II fracture toughness decreases from 1.1427 MPa\u00b7m0.5 to 0.7797 MPa\u00b7m0.5. Numerical simulations indicate that fibers positioned ahead of the crack tip\u2014especially those that are longer, located closer to the crack tip, and oriented more perpendicularly\u2014significantly reduce the mode I stress intensity factor. However, these fibers have a minimal impact on reducing the mode II stress intensity factor. The study qualitatively and quantitatively analyzes the crack resistance of basalt-fiber-reinforced concrete in relation to freeze\u2013thaw cycles and the fibers ahead of the crack tip, offering insights into the fiber reinforcement effects within the concrete matrix.<\/jats:p>","DOI":"10.3390\/ma17246275","type":"journal-article","created":{"date-parts":[[2024,12,23]],"date-time":"2024-12-23T10:06:52Z","timestamp":1734948412000},"page":"6275","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":5,"title":["Study on the Dynamic Fracture Properties of Defective Basalt Fiber Concrete Materials Under a Freeze\u2013Thaw Environment"],"prefix":"10.3390","volume":"17","author":[{"given":"Guangzhao","family":"Pei","sequence":"first","affiliation":[{"name":"Department of Mining Engineering, School of Environment and Resources, Southwest University of Science and Technology, Mianyang 621010, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-3141-695X","authenticated-orcid":false,"given":"Dingjun","family":"Xiao","sequence":"additional","affiliation":[{"name":"Department of Mining Engineering, School of Environment and Resources, Southwest University of Science and Technology, Mianyang 621010, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Miaomiao","family":"Zhang","sequence":"additional","affiliation":[{"name":"Department of Mining Engineering, School of Environment and Resources, Southwest University of Science and Technology, Mianyang 621010, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jiajie","family":"Jiang","sequence":"additional","affiliation":[{"name":"Department of Mining Engineering, School of Environment and Resources, Southwest University of Science and Technology, Mianyang 621010, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jiping","family":"Xie","sequence":"additional","affiliation":[{"name":"Department of Mining Engineering, School of Environment and Resources, Southwest University of Science and Technology, Mianyang 621010, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Xiongzi","family":"Li","sequence":"additional","affiliation":[{"name":"Department of Mining Engineering, School of Environment and Resources, Southwest University of Science and Technology, Mianyang 621010, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Junbo","family":"Guo","sequence":"additional","affiliation":[{"name":"Department of Mining Engineering, School of Environment and Resources, Southwest University of Science and Technology, Mianyang 621010, China"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2024,12,22]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"104722","DOI":"10.1016\/j.ijimpeng.2023.104722","article-title":"Neves, Impact resistance of concrete and fibre-reinforced concrete: A review","volume":"180","author":"Esaker","year":"2023","journal-title":"Int. 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