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Crack propagation analysis and mechanical properties of basalt fiber reinforced cement composites with changing fiber surface characteristics
https://orcid.org/0000-0002-2363-9005
Highlights The variations of the mechanical properties of modified BFRCC were investigated using various SCAs to improve the surface of basalt fiber chemically. The uniaxial tensile strength and peak tensile strain of modified BFRCC were obtained using DIC method. The strain field distribution and crack opening displacement of modified BFRCC under tensile load were calculated. Crack propagation speed, crack initiation and propagation energies of modified BFRCC under tensile load were analyzed.
Abstract The large-scale application of basalt fiber reinforced cement composites (BFRCC) is due to the relatively high performance and decreased CO2 footprint of basalt fiber. Still, the ultimate tensile strain of BFRCC is always difficult to exceed 1%, hindering its popularity. Chemical grafting on the basalt fiber surface is a promising way to deal with the such drawback. The crack propagation mechanism of BFRCC is also unclear. Thus, the influence of fiber interface characteristics on the tensile failure mechanism of BFRCC is analyzed. The main work of this study is to achieve ultra-high toughness BFRCC with ultimate tensile strain exceeding 2% through chemical modification of fiber surface. The decrease in bonding strength has little effect on the water absorption of BFRCC but can improve its compressive and tensile properties to 1.88 times and 1.95 times. The crack resistance mechanism of modified BFRCC was revealed. The results showed that the average crack propagation speed of modified BFRCC was one order of magnitude lower, and the initiation energy threshold and crack propagation energy were higher. Proper interfacial bonding strength and high sliding friction coefficient can suppress the cracking width and fiber breaking rate.
Crack propagation analysis and mechanical properties of basalt fiber reinforced cement composites with changing fiber surface characteristics
https://orcid.org/0000-0002-2363-9005
Highlights The variations of the mechanical properties of modified BFRCC were investigated using various SCAs to improve the surface of basalt fiber chemically. The uniaxial tensile strength and peak tensile strain of modified BFRCC were obtained using DIC method. The strain field distribution and crack opening displacement of modified BFRCC under tensile load were calculated. Crack propagation speed, crack initiation and propagation energies of modified BFRCC under tensile load were analyzed.
Abstract The large-scale application of basalt fiber reinforced cement composites (BFRCC) is due to the relatively high performance and decreased CO2 footprint of basalt fiber. Still, the ultimate tensile strain of BFRCC is always difficult to exceed 1%, hindering its popularity. Chemical grafting on the basalt fiber surface is a promising way to deal with the such drawback. The crack propagation mechanism of BFRCC is also unclear. Thus, the influence of fiber interface characteristics on the tensile failure mechanism of BFRCC is analyzed. The main work of this study is to achieve ultra-high toughness BFRCC with ultimate tensile strain exceeding 2% through chemical modification of fiber surface. The decrease in bonding strength has little effect on the water absorption of BFRCC but can improve its compressive and tensile properties to 1.88 times and 1.95 times. The crack resistance mechanism of modified BFRCC was revealed. The results showed that the average crack propagation speed of modified BFRCC was one order of magnitude lower, and the initiation energy threshold and crack propagation energy were higher. Proper interfacial bonding strength and high sliding friction coefficient can suppress the cracking width and fiber breaking rate.
Crack propagation analysis and mechanical properties of basalt fiber reinforced cement composites with changing fiber surface characteristics
https://orcid.org/0000-0002-2363-9005
Highlights The variations of the mechanical properties of modified BFRCC were investigated using various SCAs to improve the surface of basalt fiber chemically. The uniaxial tensile strength and peak tensile strain of modified BFRCC were obtained using DIC method. The strain field distribution and crack opening displacement of modified BFRCC under tensile load were calculated. Crack propagation speed, crack initiation and propagation energies of modified BFRCC under tensile load were analyzed.
Abstract The large-scale application of basalt fiber reinforced cement composites (BFRCC) is due to the relatively high performance and decreased CO2 footprint of basalt fiber. Still, the ultimate tensile strain of BFRCC is always difficult to exceed 1%, hindering its popularity. Chemical grafting on the basalt fiber surface is a promising way to deal with the such drawback. The crack propagation mechanism of BFRCC is also unclear. Thus, the influence of fiber interface characteristics on the tensile failure mechanism of BFRCC is analyzed. The main work of this study is to achieve ultra-high toughness BFRCC with ultimate tensile strain exceeding 2% through chemical modification of fiber surface. The decrease in bonding strength has little effect on the water absorption of BFRCC but can improve its compressive and tensile properties to 1.88 times and 1.95 times. The crack resistance mechanism of modified BFRCC was revealed. The results showed that the average crack propagation speed of modified BFRCC was one order of magnitude lower, and the initiation energy threshold and crack propagation energy were higher. Proper interfacial bonding strength and high sliding friction coefficient can suppress the cracking width and fiber breaking rate.
Crack propagation analysis and mechanical properties of basalt fiber reinforced cement composites with changing fiber surface characteristics
Chen, Jianxing (author) / Zhou, Lei (author) / Zhu, Zheming (author) / Ma, Leijun (author) / Wang, Meng (author) / Deng, Ze (author)
2023-05-08
Article (Journal)
Electronic Resource
English
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