Damage evaluation and deformation behavior of mine tailing-based Geopolymer under uniaxial cyclic compression

Zhang, Nan; Hedayat, Ahmadreza; Sosa, Héctor Gelber Bolaños; Cárdenas, Juan José González; Álvarez, Guido Edgard Salas; Rivera, Victor Benigno Ascuña

doi:10.1016/j.ceramint.2020.12.194

Cited by 39 publications

(19 citation statements)

References 44 publications

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“…The most common sources of aluminosilicates used for the production of geopolymers are metakaolin and by-products from other industries such as fly ash, mine tailings, red mud, slags, etc. [3][4][5][6][7][8][9][10]. There are also studies on geopolymers based on volcanic ashes [11].…”

Section: Introductionmentioning

confidence: 99%

Factors Affecting the Compressive Strength of Geopolymers: A Review

et al. 2021

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Geopolymers are created by mixing a source of aluminosilicates, which can be natural or by-products from other industries, with an alkaline solution. These materials based on by-products from other industries have proven to be a less polluting alternative for concrete production than ordinary Portland cement (OPC). Geopolymers offer many advantages over OPC, such as excellent mechanical strength, increased durability, thermal resistance, and excellent stability in acidic and alkaline environments. Within these properties, mechanical strength, more specifically compressive strength, is the most important property for analyzing geopolymers as a construction material. For this reason, this study compiled information on the different variables that affect the compressive strength of geopolymers, such as Si/Al ratio, curing temperature and time, type and concentration of alkaline activator, water content, and the effect of impurities. From the information collected, it can be mentioned that geopolymers with Si/Al ratios between 1.5 and 2.0 obtained the highest compressive strengths for the different cases. On the other hand, high moderate temperatures (between 80 and 90 °C) induced higher compressive strengths in geopolymers, because the temperature favors the geopolymerization process. Moreover, longer curing times helped to obtain higher compressive strengths for all the cases analyzed. Furthermore, it was found that the most common practice is the use of sodium hydroxide combined with sodium silicate to obtain geopolymers with good mechanical strength, where the optimum SS/NaOH ratio depends on the source of aluminosilicates to be used. Generally speaking, it was observed that higher water contents lead to a decrease in compressive strength. The presence of calcium was found to be favorable in controlled proportions as it increases the compressive strength of geopolymers, on the other hand, impurities such as heavy metals have a negative effect on the compressive strength of geopolymers.

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Section: Introductionmentioning

confidence: 99%

Factors Affecting the Compressive Strength of Geopolymers: A Review

et al. 2021

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“…Geopolymerized bricks made of different waste have been intensively studied in recent years, such as industrial aggregates [90], fly ash, construction and demolition waste [89], tailings [91][92][93][94][95][96], etc.…”

Section: Geopolymers Masonry Unitsmentioning

confidence: 99%

“…The chemical and mineralogical content of mining waste investigated by the authors [41,48,[50][51][52]54,56,62,[75][76][77][78]82,83] is shown in Table 1, Figures 3 and 4. waste [89], tailings [91][92][93][94][95][96], etc.…”

Section: Mining Waste Used For Masonry Unit's Productionmentioning

confidence: 99%

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Recycling of Mining Waste in the Production of Masonry Units

et al. 2022

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Masonry units made of clay or Autoclaved Aerated Concrete (AAC) are widely used in constructions from Romania and other countries. Masonry units with superior mechanical and thermal characteristics can improve the energy efficiency of buildings, especially when they are used as the main solutions for building envelope construction. Their production in recent years has increased vertiginously to meet the increased demand. Manufactured with diversified geometries, different mechanical and/or thermal characteristics have a high volume in the mass of the building and a major influence in their carbon footprint. Starting from the current context regarding the target imposed by the long-term strategy of built environment decarbonization, the aim of the paper is to analyze the potential of reusing mining waste in the production of masonry units. Mining waste represents the highest share of waste generated at national level and may represent a valuable resource for the construction industry, facilitating the creation of new jobs and support for economic development. This review presents the interest in integrating mining wastes in masonry unit production and the technical characteristics of the masonry units in which they have been used as raw materials in different percentages. Critical assessment framework using SWOT analysis highlights the key sustainability aspects (technical, environmental, social, economic) providing a comprehensive and systematic analysis of the advantages and disadvantages regarding the integration of mining waste as secondary raw materials into masonry units production.

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“…The damage variable is defined ascompressive strength. Based on phenomenological method theory, the damage variable under different dry-wet cycles and different concentrations of sulfate solution was calculated using Equation (3) [41][42][43][44]:…”

Section: Damage Variables Of Hdcmentioning

confidence: 99%

Experimental Study on Mechanical Properties of High-Ductility Concrete against Combined Sulfate Attack and Dry–Wet Cycles

Shi

Kou

2021

Materials

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Concrete will deteriorate and damage under sulfate attack.In order to study the degradation characteristics of HDC under sulfate attack, the mechanical properties of high-ductility concrete (HDC) were investigated using the uniaxial compressive strength test of HDC specimens soaked in different concentrations of sulfate solution and subjected to different times of dry–wet cycles. The variations in the compressive strength, loss rate of compressive strength, and the max compressive strength under the action of sulfate attack and dry–wet cycles were analyzed. The analytical expressions of damage variables were given. SEM was used to observe the microstructure of the sample, and the microdamage mechanism of the HDC was explored. The deterioration of the HDC was found to be the result of the combined action of sulfate attack and dry–wet cycles and was caused by physical attack and chemical attack. PVA prevented the rapid development of deterioration. On the basis of the change of compressive strength, the damage variable was established to quantitatively describe the degree of damage to HDC. The experimental results showed that with the increase in the number of dry–wet cycles, the compressive strength of HDC generally increased first and then decreased. As the concentration of the sulfate solution increased, the loss rate of the compressive strength of HDC generally increased and the max compressive strength gradually decreased. With the increase inthe number of dry–wet cycles, HDC first showed self-compacting characteristics and then gradually became destroyed. Compared with ordinary concrete (OC), HDC is superior to OC in sulfate resistance and dry–wet cycles. This study provided a test basis for the engineering application of HDC in sulfate attack and dry–wet cycles environment.

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Damage evaluation and deformation behavior of mine tailing-based Geopolymer under uniaxial cyclic compression

Cited by 39 publications

References 44 publications

Factors Affecting the Compressive Strength of Geopolymers: A Review

Factors Affecting the Compressive Strength of Geopolymers: A Review

Recycling of Mining Waste in the Production of Masonry Units

Experimental Study on Mechanical Properties of High-Ductility Concrete against Combined Sulfate Attack and Dry–Wet Cycles

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