Influence of types and contents of nano cellulose materials as reinforcement on stability performance of cementitious tailings backfill

Wang, Aiai; Cao, Shuai; Yılmaz, Erol

doi:10.1016/j.conbuildmat.2022.128179

Cited by 49 publications

(7 citation statements)

References 102 publications

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“…The mechanical properties of the CPB are the main influencing factor for the stability of the working face during backfill mining [11]. Generally, CPB is mostly composed of tailings, cement, and other mixed solids [12]. However, the mechanical properties of backfill materials are limited and fail to fully withstand the high stress and complex disturbance environment encountered in mining faces.…”

Section: Introductionmentioning

confidence: 99%

An Experimental Study on the Mechanical Properties and Microstructure of the Cemented Paste Backfill Made by Coal-Based Solid Wastes and Nanocomposite Fibers under Dry–Wet Cycling

Wang,

Cheng,

Zhou

et al. 2024

Materials

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The mechanical properties and microstructure of the cemented paste backfill (CPB) in dry–wet cycle environments are particularly critical in backfill mining. In this study, coal gangue, fly ash, cement, glass fiber, and nano-SiO2 were used to prepare CPB, and dry–wet cycle tests on CPB specimens with different curing ages were conducted. The compressive, tensile, and shear strength of CPB specimens with different curing ages under different dry–wet cycles were analyzed, and the microstructural damage of the specimens was observed by scanning electron microscopy (SEM). The results show that compared with the specimens without dry–wet cycles, the uniaxial compressive strength, tensile strength, and shear strength of the specimens with a curing age of 7 d after seven dry–wet cycles were the smallest, being reduced by 40.22%, 58.25%, and 66.8%, respectively. After seven dry–wet cycles, the compressive, tensile, and shear strength of the specimens with the curing age of 28 d decreased slightly. The SEM results show that with the increasing number of dry–wet cycles, the internal structure of the specimen becomes more and more loose and fragile, and the damage degree of the structural skeleton gradually increases, leading to the poor mechanical properties of CPB specimens. The number of cracks and pores on the specimen surface is relatively limited after a curing age of 28 d, while the occurrence of internal structural damage within the specimen remains insignificant. Therefore, the dry–wet cycle has an important influence on the both mechanical properties and microstructure of CPB. This study provides a reference for the treatment of coal-based solid waste and facilitates the understanding of the mechanical properties of backfill materials under dry–wet cycling conditions.

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Section: Introductionmentioning

confidence: 99%

An Experimental Study on the Mechanical Properties and Microstructure of the Cemented Paste Backfill Made by Coal-Based Solid Wastes and Nanocomposite Fibers under Dry–Wet Cycling

Wang,

Cheng,

Zhou

et al. 2024

Materials

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“…The development of the surface strain field has been successfully monitored by DIC technology. It can be used to explore the fracture evolution process, and it can also be used to both explore and elucidate fracture mechanisms [57].…”

Section: Introductionmentioning

confidence: 99%

The Failure Mechanical Properties of Cemented Paste Backfill with Recycled Rubber

Yang

Wang

et al. 2023

Materials

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Understanding the mechanical properties and failure process of cemented paste backfill with recycled rubber (RCPB) is the foundation of backfill design in underground mining. In this study, physical and mechanical tests were conducted on RCPB to obtain its mechanical property parameters, such as its uniaxial compressive strength (UCS), toughness, and peak strain. The influence of the rubber dosage on the mechanical properties of RCPB was also analyzed. In addition, the deformation behavior, fracture development, and failure process of RCPB with different rubber contents were observed using the digital image correlation (DIC) technique. The experimental results suggested that, although the UCS of RCPB is reduced as more rubber is added, its toughness and ability to absorb energy is increased. Moreover, the impact resistance of RCPB is improved by this increased toughness. With the increase in the rubber content, the deformation corresponding to the plastic yield stage of RCPB increased, which resulted in better ductility and improved impact resistance. The failure of the RCPB specimens mainly showed an “X” shape. The results of this study help us to better understand the mechanical behavior of RCPB after backfilling underground.

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“…To overcome such limitations and strengthen the structure, gypsum can be reinforced with fibers such as glass or a different kind of polymer fiber, etc. This kind of fiber addition especially stops crack propagation and improves mechanical properties [4][5][6][7][8]. Synthetic fibers (e.g.…”

Section: Introductionmentioning

confidence: 99%

Thermal and mechanical evaluation of natural fibers reinforced gypsum plaster composite

et al. 2023

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Many problems such as the increase in the world population, global drought, and greenhouse gases have caused materials used in industries to be reconsidered. This is how the concept of green composite material emerged. Using natural fibers to obtain such materials is important in terms of sustainability. This study is aimed to use hemp fiber and banana fiber as natural fiber additives in the gypsum composite to produce green bio-composite. Natural fibers are chemically modified with 5% NaOH solution. In this way, a good fiber/matrix interface interaction is provided. The composite hardness test result of 5 wt% HB fiber added sample is obtained as 50.4. Compared to the control plaster sample test result, which is 53.6, a slight decrease can be seen. However, it is observed that the fibers held the structure together and sopped the crack propagation. The increase in the porous structure with fiber addition caused a decrease in the thermal conductivity of the composite. Comparing thermal conductivity result of 5 wt% HB fiber reinforced gypsum composite (0.131 W⸳mK-1) with respect to pure gypsum result (0.237 W⸳mK-1), it gave a promising result as an insulation material.

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Influence of types and contents of nano cellulose materials as reinforcement on stability performance of cementitious tailings backfill

Cited by 49 publications

References 102 publications

An Experimental Study on the Mechanical Properties and Microstructure of the Cemented Paste Backfill Made by Coal-Based Solid Wastes and Nanocomposite Fibers under Dry–Wet Cycling

An Experimental Study on the Mechanical Properties and Microstructure of the Cemented Paste Backfill Made by Coal-Based Solid Wastes and Nanocomposite Fibers under Dry–Wet Cycling

The Failure Mechanical Properties of Cemented Paste Backfill with Recycled Rubber

Thermal and mechanical evaluation of natural fibers reinforced gypsum plaster composite

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