Mechanical behaviour and acoustic emission characteristics of basalt fibre mortar rubble under uniaxial cyclic compression

Li, Zhaoqi; Dong, Jie; Chen, Hongyun; Zhang, Wu; Feng, Kai; Zhang, Guoxiang; Chen, Shiyuan; Jiang, Tao

doi:10.1016/j.conbuildmat.2023.132145

Cited by 6 publications

(4 citation statements)

References 37 publications

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“…Additionally, freeze-thaw cycles disrupt the internal structure of the slurry masonry schist, resulting in fluctuations in the proportion of tensile cracks. These findings indicate that both lateral pressure and freeze-thaw cycles induce changes in the fracture pattern of the slurry masonry schist specimens, consistent with the findings of Li et al [53].…”

Section: Crack Classification Analysis Based On Acoustic Emission Par...supporting

confidence: 91%

“…RA denotes the ratio of the rise time of an acoustic emission event to its amplitude, and AF denotes the ratio of the ringing counts of an acoustic emission event to its duration. Researchers usually denote the ratio of RA to AF as the k value, which, according to LI et al [53], is taken to be 50 to help characterize acoustic emission events.…”

Section: Crack Classification Analysis Based On Acoustic Emission Par...mentioning

confidence: 99%

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Examination of Damage Evolution in Slurry Masonry Schist Subjected to Biaxial Compressive Stresses

Dong,

Cheng,

Chen

et al. 2024

Buildings

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This study used a static bidirectional multifunctional loading system. The system conducted bidirectional compression tests on scaled specimens of slurry masonry schist under freeze–thaw cycling conditions. This study aimed to investigate the influence of bidirectional stress coupling with freeze–thaw cycles on the mechanical properties of slurry masonry schist. The results indicate that lateral pressure can increase the peak stress of slurry masonry schist, while freeze–thaw cycles have an adverse effect on the material’s internal pore structure, counteracting the gain effect of lateral pressure. This study also employed acoustic emission (AE) technology to analyze the evolution of slurry masonry schist failure characteristics. The findings reveal that freeze–thaw cycles accelerate the failure of slurry masonry schist during loading, and lateral pressure to some extent mitigates the damage development of slurry masonry schist. The synergistic effect of lateral pressure and freeze–thaw cycles alters the fracture mode of slurry masonry schist. Acoustic emission signal localization demonstrates numerous AE localization points in the interface transition zone, forming a coherent signal band where cracks propagate toward complete interface penetration. The crack extension process of the slurry masonry schist was investigated using the digital image correlation (DIC) method. The results indicated that macroscopic cracks formed in the strain localization zone, resulting in fracture damage to the specimens, with interfacial debonding identified as the primary failure mode for slurry masonry schist structures.

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Section: Crack Classification Analysis Based On Acoustic Emission Par...supporting

confidence: 91%

Section: Crack Classification Analysis Based On Acoustic Emission Par...mentioning

confidence: 99%

Examination of Damage Evolution in Slurry Masonry Schist Subjected to Biaxial Compressive Stresses

Dong,

Cheng,

Chen

et al. 2024

Buildings

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“…In addition, BF has better compatibility with cemented materials due to their similar chemical composition [31,32]. Therefore, BF has been widely used in the engineering construction industry [33,34]. Polyacrylonitrile fiber (PANF) is a kind of green, flexible and low-cost material with excellent tensile and crack resistance [35,36].…”

Section: Introductionmentioning

confidence: 99%

Hybrid Effect of Basalt and Polyacrylonitrile Fibers on Physico-Mechanical Properties of Tailing Mortar

Xu,

Pi,

Huang

et al. 2024

Buildings

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In this study, 50% iron ore tailings (IOTs) were used to prepare the cemented mortar at low economic costs and with great environmental benefits. Basalt fiber (BF) and polyacrylonitrile fiber (PANF) were added to the tailing mortar to improve the comprehensive performance of tailing mortars, including BF (0~0.5%), PANF (0~0.05%) and the combination of them. The results show that the addition of BF and PANF can significantly improve the ultrasonic velocity, uniaxial compressive strength (UCS), split-tensile strength (STS), flexural strength (FS) and toughness of the tailing mortar. A novel finding is that the enhancement of hybrid fibers is much better than single fiber, and the best hybrid fiber combination is B0.25P0.05 (0.25 wt% BF and 0.05 wt% PANF), because this combination not only causes the most considerable increase in strength but also possesses great cost-effectiveness. Compared to the B0P0 group without fibers, the maximum increments of B0.25P0.05 in UCS, STS and FS are 45.74%, 52.33% and 15.65%, respectively. It is evidenced that the improvement in STS is the largest because the fibers have good cracking resistance and bridging effect in the tailing mortar. The scanning electron microscope (SEM) further confirms that too many hybrid fibers will agglomerate and produce more voids, which is harmful to the development of the internal structure. Beyond B0.25P0.05, the hydration products are also reduced due to the decrease in nucleation sites, observed by combining X-ray diffraction (XRD) tests. Therefore, it is suggested that the hybrid fibers containing 0.25% BF and 0.05% PANF should be used in this tailing mortar.

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“…He proposed the concept and calculation method of ultimate damage energy and derived the energy evolution law considering viscoelasticity. Zhaoqi L et al [17] employed acoustic emission technology to identify and analyze the damage of fiber mortar under cyclic loading, utilizing multiple parameters to characterize the failure mechanism of the mortar. Liang W et al [18], utilizing sonic emission technology, explored the relationship between sonic emission energy and the rate at which damage energy is released.…”

Section: Introductionmentioning

confidence: 99%

Analysis of Energy Evolution and Acoustic Emission Characteristics of Rocks under Cyclic Loading and Unloading

Wang,

Yang,

et al. 2023

Applied Sciences

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This paper presents two experimental schemes, graded cyclic loading and unloading, and variable lower limit cyclic loading and unloading, to investigate the energy evolution and acoustic emission characteristics of rocks under different cyclic loading and unloading paths. The experiments were conducted using a WAW-300B microcomputer-controlled hydraulic servo universal testing machine and an AMSY-6 acoustic emission testing instrument. The evolution characteristics of both the acoustic emission ring count and energy count during the loading process were monitored in real-time, and the energy evolution and damage status of the rocks in each cycle were inferred from the stress–strain curve. The results show that: (1) under both types of cyclic loading and unloading paths, the elastic energy, dissipative energy, and total energy of the rocks are positively correlated with the number of cycles; (2) through comparative analysis of the energy dissipation rate and storage rate, it is concluded that the gradual accumulation of dissipative energy ultimately leads to rock failure; (3) based on the energy dissipation method, the study reveals that rock damage is more severe under the variable lower limit cyclic loading and unloading path; (4) under both types of cyclic loading and unloading, the acoustic emission ring count exhibits the Kaiser effect, and Felicity is negatively correlated with the number of cycles. This holds significance in comprehending the behavior of rock deterioration and forecasting its state of destruction.

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Mechanical behaviour and acoustic emission characteristics of basalt fibre mortar rubble under uniaxial cyclic compression

Cited by 6 publications

References 37 publications

Examination of Damage Evolution in Slurry Masonry Schist Subjected to Biaxial Compressive Stresses

Examination of Damage Evolution in Slurry Masonry Schist Subjected to Biaxial Compressive Stresses

Hybrid Effect of Basalt and Polyacrylonitrile Fibers on Physico-Mechanical Properties of Tailing Mortar

Analysis of Energy Evolution and Acoustic Emission Characteristics of Rocks under Cyclic Loading and Unloading

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