Durability and strength of fiber-reinforced compacted gold tailings-cement blends

Consoli, Nilo César; Nierwinski, Helena Paula; Silva, Anderson Peccin da; Sosnoski, Jonatas

doi:10.1016/j.geotexmem.2017.01.001

Cited by 60 publications

(16 citation statements)

References 13 publications

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“…In terms of engineering properties, most scholars have emphasized on the mechanical properties of the CMS. For instance, Consoli et al [1][2][3][4][5] explored the strength and stiffness of Portland cement mixture and their relationships with molding moisture content and porosity, and also investigated the durability, strength and stiffness of green stabilized sand and fiber-reinforced compacted cement-gold tailings blends. Subramanian et al [6] analyzed the microstructure and strength development of artificial sand treated with calcium sulfoaluminate (CSA).…”

Section: Introductionmentioning

confidence: 99%

Effects of Cement-Modified Soil as Blocking Cushion of Saline Soil Subgrade

Lai¹,

Lei²,

Ji³

et al. 2020

RCMA

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This paper puts forward a novel approach called cement-modified soil (CMS) blocking cushion technology to reinforce the subgrade in saline soil region: the cushion layer of composite foundation and a roadbed partition layer are combined into one CMS layer. The effectiveness of the proposed approach was verified through outdoor experiments on the saline soil section (DK821+600-DK821+900) of the newly built Lanxin High-Speed Railway. The experimental results show that the CMS layer can effectively adjusts the pile-soil stress ratio of the composite foundation, thereby enhancing the bearing capacity of the composite foundation and reducing the total settlement of the subgrade; it is also verified that the CMS layer greatly suppresses the upward migration of capillary water and water vapor in the foundation soil, and curbs the migration of salt, preventing the secondary salinization of the railway subgrade. Overall, this research provides a simple and low-cost subgrade reinforcement technique for saline soil regions, shedding new light on the engineering application of the CMS.

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Section: Introductionmentioning

confidence: 99%

Effects of Cement-Modified Soil as Blocking Cushion of Saline Soil Subgrade

Lai¹,

Lei²,

Ji³

et al. 2020

RCMA

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“…He also stated the reversibility character of changes observed for samples pre-cured at high temperature for 24 hours using a sodium silicate activator. particles that reduce porosity and increase mechanical performance [15].…”

Section: ) Effect Of the Time For Different Drying Methodsmentioning

confidence: 99%

Effects of Preparation’s Parameters on Stabilization of Sabodala Gold Mine Tailings: Comparison of Fresh and Weathered Materials

Dia¹,

Faye²,

Keinde³

et al. 2017

GEP

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The Sabodala gold mine tailings were stabilised using geopolymerization technics in order to improve their mechanical properties in general for a reuse as building materials for local communities. The effect of several preparation parameters on the compressive and tensile strength of the stabilised tailings has been studied to define their optimums. For each formulation, all parameters are kept constant and only one is variable. The prepared samples are then tested for compressive and tensile strength to see how the variable parameter impact on these properties. The same work was carried out for the fresh tailings and for the weathered one to see whether they behave differently and if they need different treatment. The results show that for most of parameters, there is an optimal value on either side of which compressive and tensile strength decrease. Except for few parameters, the fresh and the weathered tailings have a similar behaviour with regards to trends of their mechanical properties with changing preparation conditions. In addition to the similarity of weathered and fresh tailings mechanical characteristics following their stabilization by geopolymerization, this work has proved the considerable effects of the preparation's parameters.

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“…To rise the internal quality, reduce the maintenance cost and prolong the service life of cement mortar, backfill, and concrete, fiber is designed for use in cementitious materials. Fibers can mostly reduce the formation of shrinkage cracking in cement mortar, backfilling and concrete prior to curing process, thereby considering a serious increase both strength and durability of the studied test material [47]. Four different types of fiber (polypropylene, polyacrylonitrile, glass and polyvinyl alcohol) were employed, as shown in FIGURE 3.…”

Section: ) Fiber Types and Characteristicsmentioning

confidence: 99%

Flexural Behavior of Fiber Reinforced Cemented Tailings Backfill Under Three-Point Bending

Cao¹,

Xue²,

Yilmaz³

2019

IEEE Access

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Mining methods use cemented tailings backfill (CTB) for filling mined-out voids and make operations safer since employees are working under it. Hence, the durability behavior of CTB is of great importance in applications, for example, in the assessment of slope stability when extracting ore left in neighboring stopes. Addition of cement content would increase the strength of CTB but creates extra costs to mines. To cut cement-related costs as well as improve durability, different types of fibers are added to CTB samples. This paper aims to analyze flexural behavior of fiber reinforced CTB samples under threepoint bending loading. To do so, a comprehensive laboratory work was undertaken to explore the effect of fiber reinforcement on bending resistance of CTB samples, based on orthogonal experimental design. The effect of fiber type (FT), fiber content (FC), solid content (SC) and cement-to-tailings ratio (c/t) on bending characteristics was investigated. Results indicate that the addition of fiber enhances the bending strength of fiber reinforced CTB samples and the bearing capacity after the peak in the load-deflection curve. Fibers help correct the faintness of CTB samples by mobilizing tensile strength along the failure planes. The crack resistance of fiber is reflected in the crack propagation stage. Secondly, the order of the sensitivity of four factors on bending strength of fiber reinforced CTB samples is as follows: c/t > SC > FT > FC. Lastly, the main findings of this study can provide a major reference for CTB's last design in underground mining.INDEX TERMS Cemented tailings backfill, fiber types and properties, bending strength testing, load-deflection analysis, microstructural characteristics.

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Durability and strength of fiber-reinforced compacted gold tailings-cement blends

Cited by 60 publications

References 13 publications

Effects of Cement-Modified Soil as Blocking Cushion of Saline Soil Subgrade

Effects of Cement-Modified Soil as Blocking Cushion of Saline Soil Subgrade

Effects of Preparation’s Parameters on Stabilization of Sabodala Gold Mine Tailings: Comparison of Fresh and Weathered Materials

Flexural Behavior of Fiber Reinforced Cemented Tailings Backfill Under Three-Point Bending

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