{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,8,18]],"date-time":"2026-08-18T05:03:52Z","timestamp":1787029432317,"version":"build-2736575974"},"reference-count":39,"publisher":"MDPI AG","issue":"14","license":[{"start":{"date-parts":[[2024,7,14]],"date-time":"2024-07-14T00:00:00Z","timestamp":1720915200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"Scientific Research Foundation for High-level Talents","award":["XJ17T08"],"award-info":[{"award-number":["XJ17T08"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Polymers"],"abstract":"<jats:p>High-strength concrete (HSC) has a high compressive strength, high density, excellent durability, and seepage resistance, but its deformation ability is weak. Adding fibers can improve the physical and mechanical properties of HSC. Additionally, the HSC structure may face the threat of fire. In the process of fire extinguishing, the damage mechanism of high-temperature-resistant concrete is complicated due to the different contact conditions with water at different locations. Hence, it is essential to conduct pertinent research on the behavior of fiber-reinforced HSC with different cooling methods after high-temperature action. In this paper, polyvinyl alcohol fiber (PVA fiber) was selected to be added into the HSC to carry out high-temperature experimental research, so as to explore the apparent changes, failure pattern, and mass loss rate of the fiber-reinforced HSC using different cooling methods and analyze the influence of its residual compressive strength and flexural strength. The test results suggest that, with the increase in heating temperature, the color of the specimen\u2019s surface transitions from dark blue-gray to white, and the quantity of surface cracks on the specimen gradually rises. The mechanical strength gradually decreases as the heating temperature increases. At a consistent heating temperature, the mechanical strength initially rises, and then falls with an increase in fiber content. The maximum compressive strength and flexural strength were achieved at PVA fiber contents of 0.2% and 0.3%, respectively. For different temperatures and fiber contents, the mechanical strength after natural cooling is generally higher than that after immersion cooling. In addition, X-ray polycrystalline diffractometry (XRD) and scanning electron microscopy (SEM) tests were conducted to analyze the compositional alterations and microstructure of the fiber-reinforced HSC following high-temperature exposure, accompanied by an explanation of the factors influencing the alterations in the physical and mechanical properties. Therefore, the findings of this study can serve as a valuable reference for the utilization of HSC in engineering structures and contribute to the advancement of HSC technology.<\/jats:p>","DOI":"10.3390\/polym16142012","type":"journal-article","created":{"date-parts":[[2024,7,15]],"date-time":"2024-07-15T08:35:17Z","timestamp":1721032517000},"page":"2012","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":4,"title":["An Experimental Study on the Influence of Different Cooling Methods on the Mechanical Properties of PVA Fiber-Reinforced High-Strength Concrete after High-Temperature Action"],"prefix":"10.3390","volume":"16","author":[{"given":"Jian","family":"Wu","sequence":"first","affiliation":[{"name":"Shaanxi Key Laboratory of Safety and Durability of Concrete Structures, Xijing University, Xi\u2019an 710123, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Chaoqun","family":"Hu","sequence":"additional","affiliation":[{"name":"Shaanxi Key Laboratory of Safety and Durability of Concrete Structures, Xijing University, Xi\u2019an 710123, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yuxi","family":"Wang","sequence":"additional","affiliation":[{"name":"Shaanxi Key Laboratory of Safety and Durability of Concrete Structures, Xijing University, Xi\u2019an 710123, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Liangjie","family":"Hu","sequence":"additional","affiliation":[{"name":"Shaanxi Key Laboratory of Safety and Durability of Concrete Structures, Xijing University, Xi\u2019an 710123, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Lidan","family":"Zhang","sequence":"additional","affiliation":[{"name":"Shaanxi Key Laboratory of Safety and Durability of Concrete Structures, Xijing University, Xi\u2019an 710123, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jianhui","family":"Wang","sequence":"additional","affiliation":[{"name":"Shaanxi Key Laboratory of Safety and Durability of Concrete Structures, Xijing University, Xi\u2019an 710123, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Weigao","family":"Ding","sequence":"additional","affiliation":[{"name":"School of Infrastructure Engineering, Dalian University of Technology, Dalian 116024, China"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2024,7,14]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","unstructured":"Zhou, H., Jia, B., Huang, H., and Mou, Y. (2020). Experimental study on basic mechanical properties of basalt fiber reinforced concrete. Materials, 13.","DOI":"10.3390\/ma13061362"},{"key":"ref_2","doi-asserted-by":"crossref","unstructured":"Li, Y., Shen, A., and Wu, H. (2020). Fractal dimension of basalt fiber reinforced concrete (BFRC) and its correlations to pore structure, strength and shrinkage. Materials, 13.","DOI":"10.3390\/ma13143238"},{"key":"ref_3","doi-asserted-by":"crossref","first-page":"119972","DOI":"10.1016\/j.conbuildmat.2020.119972","article-title":"Mechanical properties and impact resistance of a high-strength lightweight concrete incorporating prickly pear fibers","volume":"262","author":"Trabelsi","year":"2020","journal-title":"Constr. Build. Mater."},{"key":"ref_4","doi-asserted-by":"crossref","first-page":"105786","DOI":"10.1016\/j.cemconres.2019.105786","article-title":"Changes in rheology and mechanical properties of ultra-high-performance concrete with silica fume content","volume":"123","author":"Wu","year":"2019","journal-title":"Cement Concrete Res."},{"key":"ref_5","unstructured":"Klingsch, E.W.H. (2014). Explosive Spalling of Concrete in Fire. [Master\u2019s Thesis, Swiss Federal Institute of Technology]."},{"key":"ref_6","first-page":"71","article-title":"Principles underlying production of high-performance concrete","volume":"2","author":"Mehta","year":"1990","journal-title":"Cem. Concr. Aggreg."},{"key":"ref_7","unstructured":"Aitcin, P.C. (1988). High-Performance Concrete, E. and F.N. Spon."},{"key":"ref_8","doi-asserted-by":"crossref","first-page":"1028","DOI":"10.1016\/j.scient.2011.09.001","article-title":"Performance of high Strength concretes at elevated temperatures","volume":"18","author":"Bastami","year":"2011","journal-title":"Sci. Iran."},{"key":"ref_9","doi-asserted-by":"crossref","first-page":"957","DOI":"10.1016\/j.matdes.2013.06.034","article-title":"Evaluation of ultra-high-performance-fiber reinforced concrete binder content using the response surface method","volume":"52","author":"Aldahdooh","year":"2013","journal-title":"Mater. Design."},{"key":"ref_10","doi-asserted-by":"crossref","first-page":"554","DOI":"10.1016\/j.conbuildmat.2015.12.147","article-title":"Effects of high-pressure\/temperature curing on reactive powder concrete microstructure formation","volume":"105","author":"Helmi","year":"2016","journal-title":"Constr. Build. Mater."},{"key":"ref_11","doi-asserted-by":"crossref","first-page":"591","DOI":"10.1617\/s11527-013-0082-9","article-title":"Prediction of spalling in fiber-reinforced high strength concrete at elevated temperatures","volume":"47","author":"Mugume","year":"2014","journal-title":"Mater. Struct."},{"key":"ref_12","doi-asserted-by":"crossref","first-page":"116721","DOI":"10.1016\/j.conbuildmat.2019.116721","article-title":"Flexural strength at high temperatures of a high strength steel and polypropylene fiber concrete","volume":"227","author":"Caetano","year":"2019","journal-title":"Constr. Build. Mater."},{"key":"ref_13","doi-asserted-by":"crossref","first-page":"127935","DOI":"10.1016\/j.conbuildmat.2022.127935","article-title":"Compressive behavior of reinforced steel-PVA hybrid fiber concrete short columns after high temperature exposure","volume":"342","author":"Xiao","year":"2022","journal-title":"Constr. Build. Mater."},{"key":"ref_14","first-page":"483","article-title":"Tensile strain-hardening behavior of polyvinyl alcohol engineered cementitious composite (PVA-ECC)","volume":"98","author":"Li","year":"2001","journal-title":"ACI Mater. J."},{"key":"ref_15","doi-asserted-by":"crossref","first-page":"30","DOI":"10.1016\/j.compstruct.2016.06.008","article-title":"Investigating the performance of PVA and basalt fiber reinforced beams subjected to flexural action","volume":"153","author":"Shafiq","year":"2016","journal-title":"Compos. Struct."},{"key":"ref_16","doi-asserted-by":"crossref","first-page":"110171","DOI":"10.1016\/j.compositesb.2022.110171","article-title":"High-temperature behavior of polyvinyl alcohol fiber-reinforced metakaolin\/fly ash-based geopolymer mortar","volume":"244","author":"Zhang","year":"2022","journal-title":"Compos. Part B Eng."},{"key":"ref_17","doi-asserted-by":"crossref","unstructured":"Mpalaskas, A.C., Matikas, T.E., and Aggelis, D.G. (2016). Acoustic emission of fire damaged fiber reinforced concrete. Smart Materials and Nondestructive Evaluation for Energy Systems 2016, SPIE.","DOI":"10.1117\/12.2220029"},{"key":"ref_18","doi-asserted-by":"crossref","unstructured":"Voutetaki, M.E., Naoum, M.C., Papadopoulos, N.A., and Chalioris, C.E. (2021). Papadopoulos C.E. Chalioris. Cracking diagnosis in fiber-reinforced concrete with synthetic fibers using piezoelectric transducers. Fibers, 10.","DOI":"10.3390\/fib10010005"},{"key":"ref_19","doi-asserted-by":"crossref","first-page":"119944","DOI":"10.1016\/j.conbuildmat.2020.119944","article-title":"Workability, fiber distribution, and mechanical properties of UHPC with hooked end steel macro-fibers","volume":"260","author":"Hung","year":"2020","journal-title":"Constr. Build. Mater."},{"key":"ref_20","doi-asserted-by":"crossref","first-page":"261","DOI":"10.1016\/S0950-0618(00)00031-3","article-title":"Effect of high temperature and cooling regimes on the compressive strength and pore properties of high performance concrete","volume":"14","author":"Luo","year":"2000","journal-title":"Constr. Build. Mater."},{"key":"ref_21","doi-asserted-by":"crossref","first-page":"1157","DOI":"10.1016\/S0008-8846(98)00083-0","article-title":"Effect of temperature on phase composition and microstructure of artificial pozzolana-cement pastes containing burnt kaolinite clay","volume":"28","author":"Morsy","year":"1998","journal-title":"Cem. Concr. Res."},{"key":"ref_22","doi-asserted-by":"crossref","first-page":"948","DOI":"10.1016\/j.conbuildmat.2006.12.002","article-title":"Effect of thermal shock due to rapid cooling on residual mechanical properties of fiber concrete exposed to high temperatures","volume":"22","author":"Peng","year":"2008","journal-title":"Constr. Build. Mater."},{"key":"ref_23","doi-asserted-by":"crossref","first-page":"379","DOI":"10.1016\/S0008-8846(99)00264-1","article-title":"Effect of heating and cooling regimes on residual strength and microstructure of normal strength and high-performance concrete","volume":"30","author":"Luo","year":"2000","journal-title":"Cement Concrete Res."},{"key":"ref_24","doi-asserted-by":"crossref","unstructured":"An, H., Song, Y., Liu, L., and Meng, X. (2021). Experimental study of the compressive strengths of basalt fiber-reinforced concrete after various high-temperature treatments and cooling in open air and water. Appl. Sci., 11.","DOI":"10.3390\/app11188729"},{"key":"ref_25","doi-asserted-by":"crossref","first-page":"117732","DOI":"10.1016\/j.engstruct.2024.117732","article-title":"Fire resistance of square concrete columns reinforced with GFRP bars, experimental and numerical investigation","volume":"305","author":"Elsalam","year":"2024","journal-title":"Eng. Struct."},{"key":"ref_26","unstructured":"(2009). Standard Test Methods for Fiber Reinforced Concrete (Standard No. CECS 13-2009)."},{"key":"ref_27","unstructured":"(2008). Fire-Resistance Test-Elements of Building Construction-Part 1: General Requirements (Standard No. GB\/T 9978.1-2008)."},{"key":"ref_28","doi-asserted-by":"crossref","first-page":"754","DOI":"10.1016\/j.cemconres.2009.05.008","article-title":"A multiscale model for modulus of elasticity of concrete at high temperatures","volume":"39","author":"Lee","year":"2009","journal-title":"Cement Concrete Res."},{"key":"ref_29","first-page":"106","article-title":"Experimental study on compressive strength of concrete under lasting sub-high temperature","volume":"41","author":"Shi","year":"2011","journal-title":"J. Build. Struct."},{"key":"ref_30","doi-asserted-by":"crossref","first-page":"82","DOI":"10.1016\/j.conbuildmat.2014.11.005","article-title":"Experimental research for the effect of high temperature on the mechanical properties of steel fiber-reinforced concrete","volume":"75","author":"Haktanir","year":"2015","journal-title":"Constr. Build. Mater."},{"key":"ref_31","unstructured":"(2009). Standard for Test Methods of Concrete Physical and Mechanical Properties (Standard No. GB\/T 50081-2019)."},{"key":"ref_32","doi-asserted-by":"crossref","first-page":"2022","DOI":"10.1007\/s11434-015-0939-0","article-title":"An experimental investigation of the thermal spalling of polypropylene-fibered reactive powder concrete exposed to elevated temperatures","volume":"60","author":"Ju","year":"2015","journal-title":"Sci. Bull."},{"key":"ref_33","doi-asserted-by":"crossref","first-page":"121284","DOI":"10.1016\/j.conbuildmat.2020.121284","article-title":"Mechanical properties of basalt and polypropylene fiber-reinforced alkali-activated slag concrete","volume":"269","author":"Zhou","year":"2020","journal-title":"Constr. Build. Mater."},{"key":"ref_34","doi-asserted-by":"crossref","first-page":"106117","DOI":"10.1016\/j.cemconres.2020.106117","article-title":"A review of mechanical properties of fiber reinforced concrete at elevated temperatures","volume":"135","author":"Wu","year":"2020","journal-title":"Cement Concrete Res."},{"key":"ref_35","doi-asserted-by":"crossref","first-page":"124141","DOI":"10.1016\/j.conbuildmat.2021.124141","article-title":"Experimental study on mechanical properties of precast cracked concrete under different cooling methods","volume":"301","author":"Zhao","year":"2021","journal-title":"Constr. Build. Mater."},{"key":"ref_36","doi-asserted-by":"crossref","first-page":"129360","DOI":"10.1016\/j.conbuildmat.2022.129360","article-title":"A review of the mechanical properties and durability of basalt fiber-reinforced concrete","volume":"359","author":"Zheng","year":"2022","journal-title":"Constr. Build. Mater."},{"key":"ref_37","doi-asserted-by":"crossref","first-page":"771","DOI":"10.1107\/S1600576716003885","article-title":"Structure of nanocrystalline calcium silicate hydrates: Insights from X-ray diffraction, synchrotron X-ray absorption and nuclear magnetic resonance","volume":"49","author":"Grangeon","year":"2016","journal-title":"J. Appl. Crystallogr."},{"key":"ref_38","doi-asserted-by":"crossref","first-page":"381","DOI":"10.1016\/S0008-8846(98)00007-6","article-title":"Thermal decomposition of hydrated alumina (CAH10)","volume":"28","author":"Guirado","year":"1998","journal-title":"Cement Concrete Res."},{"key":"ref_39","doi-asserted-by":"crossref","first-page":"609","DOI":"10.1016\/j.cemconres.2004.06.015","article-title":"The use of thermal analysis in assessing the effect of temperature on a cement paste","volume":"35","author":"Platret","year":"2005","journal-title":"Cement Concrete Res."}],"container-title":["Polymers"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/2073-4360\/16\/14\/2012\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,10]],"date-time":"2025-10-10T15:16:33Z","timestamp":1760109393000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/2073-4360\/16\/14\/2012"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2024,7,14]]},"references-count":39,"journal-issue":{"issue":"14","published-online":{"date-parts":[[2024,7]]}},"alternative-id":["polym16142012"],"URL":"https:\/\/doi.org\/10.3390\/polym16142012","relation":{},"ISSN":["2073-4360"],"issn-type":[{"value":"2073-4360","type":"electronic"}],"subject":[],"published":{"date-parts":[[2024,7,14]]}}}