Study on Mechanical Properties and Pore Structure of Hybrid Fiber Reinforced Rubber Concrete

Liu, Yushan; Pang, Jianzhang; Chen, Qiaoqiao; Yao, Weijing

doi:10.3390/cryst11111307

Cited by 5 publications

(7 citation statements)

References 34 publications

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“…Deng Fengqiang et al [38] found through experiments that the reinforcement effects of polypropylene fibre (PF) on the toughness and crack resistance of plain concrete are more pronounced than those on high-strength concrete. Liu Yushan [39] demonstrated through experiments that basalt fibre (BF) and polyvinyl alcohol fibre (PF) can enhance and fortify rubber concrete, impacting the mechanical properties, pore structure, and microstructure. According to experiments conducted by Fu Qiang and his team [40], inclusions of BF and PF in concrete can boost its flexural strength and enhance the tortuosity of crack propagation, ultimately improving its ductility.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on the Mechanical Properties of Hybrid Basalt-Polypropylene Fibre-Reinforced Gangue Concrete

Yang,

Xin,

Sun

et al. 2024

Applied Sciences

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Incomplete data indicate that coal gangue is accumulated in China, with over 2000 gangue hills covering an area exceeding 200,000 mu and an annual growth rate surpassing 800 million tons. This accumulation not only signifies a substantial waste of resources but also poses a significant danger to the environment. Utilizing coal gangue as an aggregate in the production of coal-gangue concrete offers an effective avenue for coal-gangue recycling. However, compared with ordinary concrete, the strength and ductility of coal-gangue concrete require enhancement. Due to coal-gangue concrete having higher brittleness and lower deformation resistance than ordinary concrete, basalt fibre (BF) is a green, high-performance fibre that exhibits excellent bonding properties with cement-based materials, and polypropylene fibre (PF) is a flexible fibre with high deformability; thus, we determine if adding BF and PF to coal-gangue concrete can enhance its ductility and strength. In this paper, the stress–strain curve trends of different hybrid basalt–polypropylene fibre-reinforced coal-gangue concrete (HBPRGC) specimens under uniaxial compression are studied when the matrix strengths are C20 and C30. The effects of BF and PF on the mechanical and energy conversion behaviours of coal-gangue concrete are analysed. The results show that the ductile deformation of coal-gangue concrete can be markedly enhanced at a 0.1% hybrid-fibre volume content; HBPRGC-20-0.1 and HBPRGC-30-0.1 have elevations of 53.66% and 51.45% in total strain energy and 54.11% and 50% in dissipative energy, respectively. And HBPRGC-20-0.2 and HBPRGC-30-0.2 have elevations of 31.95% and 30.32% in total strain energy and −3.46% and 28.71% in dissipative energy, respectively. With hybrid-fibre volume content increased, the elastic modulus, the total strain energy, and the dissipative energy all show a downward trend. Therefore, 0.1% seems to be the optimum hybrid-fibre volume content for well-enhancing the ductility and strength of coal-gangue concrete. Finally, the damage evolution and deformation trends of coal-gangue concrete doped with fibre under uniaxial action are studied theoretically, and the constitutive model and damage evolution equation of HBPRGC are established based on Weibull theory The model and the equation are in good agreement with the experimental results.

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Section: Introductionmentioning

confidence: 99%

Experimental Study on the Mechanical Properties of Hybrid Basalt-Polypropylene Fibre-Reinforced Gangue Concrete

Yang,

Xin,

Sun

et al. 2024

Applied Sciences

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“…CRC is a composite based on ordinary concrete that is formed by adding finer crumb rubber to replace some of the fine aggregate or larger crumb rubber to replace some of the coarse aggregate. Research has shown that CRC outperforms ordinary concrete in terms of energy absorption and consumption [ 13 , 14 ], fatigue resistance [ 15 ], reducing material brittle failure [ 16 ], deformation capacity [ 17 ], hindering crack development [ 18 ], durability [ 19 , 20 , 21 ], and thermal performance [ 22 ]. To reduce the degree of brittle failure of deep foundation pit support structures, the application of CRC to deep foundation pit support has been studied [ 16 ].…”

Section: Introductionmentioning

confidence: 99%

“…Research has shown that CRC outperforms ordinary concrete in terms of energy absorption and consumption [ 13 , 14 ], fatigue resistance [ 15 ], reducing material brittle failure [ 16 ], deformation capacity [ 17 ], hindering crack development [ 18 ], durability [ 19 , 20 , 21 ], and thermal performance [ 22 ]. To reduce the degree of brittle failure of deep foundation pit support structures, the application of CRC to deep foundation pit support has been studied [ 16 ]. The addition of rubber powder has a positive impact on the durability of concrete and can effectively reduce the migration rate of chloride ions in the concrete [ 21 ].…”

Section: Introductionmentioning

confidence: 99%

“…In addition, in order to make full use of the denaturation ability of CRC, steel fiber has recently been introduced by some scholars to enhance the impact toughness of concrete [ 28 ]. CRC has currently been applied to crumb rubber concrete blocks [ 29 ], CRC bridge panels [ 30 ], self-compacting concrete [ 31 ], permeable concrete [ 32 , 33 ], rubber asphalt concrete pavement [ 34 ], and flexible components [ 16 ].…”

Section: Introductionmentioning

confidence: 99%

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Experimental Study on the Mechanical Properties of Crumb Rubber Concrete after Elevated Temperature

Yang

Lv²,

Bai

et al. 2023

Polymers

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To reduce the environmental damage caused by waste rubber, crumb rubber concrete (CRC) was prepared by replacing some fine aggregates with crumb rubber. The effects of elevated temperature as well as crumb rubber content on the mechanical properties of the prepared CRC were studied. The crumb rubber contents were 0%, 10%, and 20%, while CRC was subjected to atmospheric temperatures (AT) of 300 °C, 500 °C, and 700 °C. The concrete without crumb rubber content was used as the control group at the atmospheric temperature. The mass loss, thermal conductivity characteristics, compressive strength, splitting tensile strength, axial compressive strength, elastic modulus, and stress-strain characteristics of CRC at elevated temperatures were studied. The experimental results show that: (1) With the increase in crumb rubber content and temperature, the cracks on the surface of the specimen gradually widen while the mass loss of the specimen increases. (2) With the increase in crumb rubber content and temperature, the cube compressive strength, splitting tensile strength, axial compressive strength, and elastic modulus of CRC decrease, yet the plastic failure characteristics of CRC are more obvious. (3) The influences of elevated temperature on strength and elastic modulus are as follows: splitting tensile strength > elastic modulus > axial compressive strength > cubic compressive strength. (4) With the increase in temperature, the stress-strain curve of the CRC tends to flatten, the peak stress decreases, and the corresponding peak strain significantly increases. With the increase in crumb rubber content, there is a great decrease in peak stress, yet the corresponding peak strain is basically the same. The use of CRC can be prioritized in applications that increase toughness rather than strength.

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“…Physical reinforcement technology not only improves the strength of soil but also greatly improves the physical and mechanical properties of soil, such as tensile and flexural strength, so it has been widely used. The commonly used soil reinforcement materials include cotton and hemp products [9,[14][15][16], geotextile [17][18][19], polypropylene fiber [20][21][22][23][24][25][26], glass fiber [27], basalt fiber [27][28][29], and steel fiber [7,25]. The natural tensile properties, surface friction properties, and good dispersion of these materials make them connected with the cementitious substances produced by the hydration reaction of cement in a network 2 of 19 structure, which enhances the bonding force of the contact interface and improves the ability of soil to resist deformation.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on Strength of Polypropylene Fiber Reinforced Cemented Silt Soil

et al. 2022

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To improve the poor characteristics of low strength and high compressibility of weak silty soil, a series of samples with different cement dosage, fiber content, and fiber length was prepared in this experiment, and unconfined compressive strength (UCS) tests, triaxial tests, and scanning electron microscopy (SEM) tests were carried out to explore the influence of polypropylene fiber on the strength of cement-stabilized soil and analyze the curing mechanism of fiber-reinforced cement soil. The test results show that the factors affecting the UCS of the sample from high to low were: cement dosage, fiber content, and fiber length. An orthogonal test found that the optimal ratio of the sample was cement dosage of 18%, fiber content of 0.4%, and fiber length of 3 mm, and the UCS of the sample can reach 1.63 MPa. The triaxial test shows that when the cement dosage is 15% and the fiber length is 9 mm, the incorporation of fiber can significantly improve the toughness and strength of soil. When the cement dosage is 15%, the UCS with 0.4% fiber content is 1.6 times that without fiber. With the increase of fiber content, the peak stress and axial strain of fiber-cured soil are increased, and the cohesion and internal friction angle are also increased. The failure mode and SEM test of fiber-reinforced cement soil show that when the cement dosage is 15% and the fiber length is 9 mm, the addition of fiber can improve the deformation ability of cement soil and slow down the development of cracks. With the increase in fiber content, the number and width of cracks are significantly reduced, and the failure mode changes from brittle failure to ductile failure.

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Study on Mechanical Properties and Pore Structure of Hybrid Fiber Reinforced Rubber Concrete

Cited by 5 publications

References 34 publications

Experimental Study on the Mechanical Properties of Hybrid Basalt-Polypropylene Fibre-Reinforced Gangue Concrete

Experimental Study on the Mechanical Properties of Hybrid Basalt-Polypropylene Fibre-Reinforced Gangue Concrete

Experimental Study on the Mechanical Properties of Crumb Rubber Concrete after Elevated Temperature

Experimental Study on Strength of Polypropylene Fiber Reinforced Cemented Silt Soil

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