Study on the Evolution Law of Mechanical Properties of the Modified High Strength BF-RCC Subjected to High Temperature
Basalt fiber-reinforced cementitious composites (BF-RCC) have attracted considerable research interest in construction engineering owing to their excellent mechanical performance. However, some great challenges, such as limited ultimate tensile strain (typically less than 1%) and poor high-temperatu...
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2025-06-01
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| author | Zixuan Liu Lei Zhou Fukuan Nie Jian Hua Hongdan Zhang Yao Li Junjie Liu |
| author_facet | Zixuan Liu Lei Zhou Fukuan Nie Jian Hua Hongdan Zhang Yao Li Junjie Liu |
| author_sort | Zixuan Liu |
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| description | Basalt fiber-reinforced cementitious composites (BF-RCC) have attracted considerable research interest in construction engineering owing to their excellent mechanical performance. However, some great challenges, such as limited ultimate tensile strain (typically less than 1%) and poor high-temperature resistance, have restricted its broader application. This study explores the influence of silane coupling agent (SCA) modification on the mechanical performance of the BF-RCC under high-temperature environments. The basalt fibers were treated with KH602 (SCA) to enhance interfacial bonding with the cement matrix under high-temperature environments. The mechanical performance of BF-RCC, including tensile strength, compressive strength, elastic modulus, crack propagation behavior and toughness index, was evaluated under different SCA concentrations (2.5% and 4.5%) and different temperatures (20 °C, 200 °C, 300 °C and 400 °C). The findings demonstrate that the tensile strength and compressive strength of the BF-RCC are elevated by 1.5 times and 1.7 times, respectively, while the toughness index and elastic modulus are enhanced by 1.6 times and 1.4 times, respectively. The incorporation of SCA significantly reduces the mass loss of the BF-RCC under high temperatures, with the 2.5% KH602 concentration exhibiting the optimal performance. However, when the temperature exceeds 300 °C, the mechanical properties of the BF-RCC deteriorate markedly. Digital image correlation (DIC) technology demonstrated that SCA-modified BF-RCC displays enhanced crack propagation resistance, with post-peak fracture energy showing a concentration-dependent increase, thereby reducing material brittleness. |
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| institution | Kabale University |
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| language | English |
| publishDate | 2025-06-01 |
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| spelling | doaj-art-d990a67da00a4dafbeff6ae74601a52e2025-08-20T03:26:20ZengMDPI AGBuildings2075-53092025-06-011512201210.3390/buildings15122012Study on the Evolution Law of Mechanical Properties of the Modified High Strength BF-RCC Subjected to High TemperatureZixuan Liu0Lei Zhou1Fukuan Nie2Jian Hua3Hongdan Zhang4Yao Li5Junjie Liu6State Key Laboratory of Intelligent Construction and Healthy Operation and Maintenance of Deep Underground Engineering, College of Architecture and Environment, Sichuan University, Chengdu 610065, ChinaState Key Laboratory of Intelligent Construction and Healthy Operation and Maintenance of Deep Underground Engineering, College of Architecture and Environment, Sichuan University, Chengdu 610065, ChinaState Key Laboratory of Intelligent Construction and Healthy Operation and Maintenance of Deep Underground Engineering, College of Architecture and Environment, Sichuan University, Chengdu 610065, ChinaState Key Laboratory of Intelligent Construction and Healthy Operation and Maintenance of Deep Underground Engineering, College of Architecture and Environment, Sichuan University, Chengdu 610065, ChinaState Key Laboratory of Intelligent Construction and Healthy Operation and Maintenance of Deep Underground Engineering, College of Architecture and Environment, Sichuan University, Chengdu 610065, ChinaState Key Laboratory of Intelligent Construction and Healthy Operation and Maintenance of Deep Underground Engineering, College of Architecture and Environment, Sichuan University, Chengdu 610065, ChinaApplied Mechanics and Structure Safety Key Laboratory of Sichuan Province, School of Mechanics and Aerospace Engineering, Southwest Jiaotong University, Chengdu 610031, ChinaBasalt fiber-reinforced cementitious composites (BF-RCC) have attracted considerable research interest in construction engineering owing to their excellent mechanical performance. However, some great challenges, such as limited ultimate tensile strain (typically less than 1%) and poor high-temperature resistance, have restricted its broader application. This study explores the influence of silane coupling agent (SCA) modification on the mechanical performance of the BF-RCC under high-temperature environments. The basalt fibers were treated with KH602 (SCA) to enhance interfacial bonding with the cement matrix under high-temperature environments. The mechanical performance of BF-RCC, including tensile strength, compressive strength, elastic modulus, crack propagation behavior and toughness index, was evaluated under different SCA concentrations (2.5% and 4.5%) and different temperatures (20 °C, 200 °C, 300 °C and 400 °C). The findings demonstrate that the tensile strength and compressive strength of the BF-RCC are elevated by 1.5 times and 1.7 times, respectively, while the toughness index and elastic modulus are enhanced by 1.6 times and 1.4 times, respectively. The incorporation of SCA significantly reduces the mass loss of the BF-RCC under high temperatures, with the 2.5% KH602 concentration exhibiting the optimal performance. However, when the temperature exceeds 300 °C, the mechanical properties of the BF-RCC deteriorate markedly. Digital image correlation (DIC) technology demonstrated that SCA-modified BF-RCC displays enhanced crack propagation resistance, with post-peak fracture energy showing a concentration-dependent increase, thereby reducing material brittleness.https://www.mdpi.com/2075-5309/15/12/2012basalt fiber-reinforced cementitious composites (BF-RCC)high temperaturesilane coupling agent (SCA)mechanical propertiesstrain evolution lawpost-peak fracture energy |
| spellingShingle | Zixuan Liu Lei Zhou Fukuan Nie Jian Hua Hongdan Zhang Yao Li Junjie Liu Study on the Evolution Law of Mechanical Properties of the Modified High Strength BF-RCC Subjected to High Temperature Buildings basalt fiber-reinforced cementitious composites (BF-RCC) high temperature silane coupling agent (SCA) mechanical properties strain evolution law post-peak fracture energy |
| title | Study on the Evolution Law of Mechanical Properties of the Modified High Strength BF-RCC Subjected to High Temperature |
| title_full | Study on the Evolution Law of Mechanical Properties of the Modified High Strength BF-RCC Subjected to High Temperature |
| title_fullStr | Study on the Evolution Law of Mechanical Properties of the Modified High Strength BF-RCC Subjected to High Temperature |
| title_full_unstemmed | Study on the Evolution Law of Mechanical Properties of the Modified High Strength BF-RCC Subjected to High Temperature |
| title_short | Study on the Evolution Law of Mechanical Properties of the Modified High Strength BF-RCC Subjected to High Temperature |
| title_sort | study on the evolution law of mechanical properties of the modified high strength bf rcc subjected to high temperature |
| topic | basalt fiber-reinforced cementitious composites (BF-RCC) high temperature silane coupling agent (SCA) mechanical properties strain evolution law post-peak fracture energy |
| url | https://www.mdpi.com/2075-5309/15/12/2012 |
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