Leaching and geochemical behavior of fired bricks containing coal wastes

Taha, Yassine; Benzaazoua, Mostafa; Edahbi, Mohamed; Mansori, Mohammed; Hakkou, Rachid

doi:10.1016/j.jenvman.2017.12.060

Cited by 39 publications

(12 citation statements)

References 15 publications

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“…This study also supports previous work (Minhaj et al, 2018;Poinot et al, 2018;Taha et al, 2018). It was reported that lighter weight bricks could be produced using a mixture of the wastes, which help reduce the prototype's weight.…”

Section: Resultssupporting

confidence: 90%

Banner Waste Mixture: The Impact on Quality of Traditional Brick’s Compressive Strength

Maryana¹,

Ikhwanuddin

Anggini

et al. 2020

JIPFAlBiruni

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The regional election in Lampung province has finished. The events left the amount of ex-campaign props such as banner to become waste. The final landfills and the waste reuse system are still an unsolved issue in Lampung province. A study of materials composition is required to find potential reuse of the waste. One of the traditional products in Lampung province is conventional bricks. Previous studies show that mixing local clay with additional materials such as Rice Husk Ash (RHA) could improve its characteristics, especially water absorption potentiality. This study reported the prototype of bricks with banners waste mix produced employing a conventional method. The method obtains the best admixture composition is 0.002 kilograms banner waste/volume 0.125 liters or 0.02% total weight of clay-dough. The morphology of the prototype shows a similar texture with a non-waste mixture of traditional brick. It is burnt-clay red-bricks, which is used as a control in this study. The prototype bricks show smooth texture and nearly flat on all sides. The addition waste composition ratio of more than 0.002 kilograms indicated cracking texture that affects the market tend to buy bricks, which has good appearance and texture. This study also reported that the mixture's effect is decreasing compressive strength, almost 20% from the control sample.

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Section: Resultssupporting

confidence: 90%

Banner Waste Mixture: The Impact on Quality of Traditional Brick’s Compressive Strength

Maryana¹,

Ikhwanuddin

Anggini

et al. 2020

JIPFAlBiruni

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“…It was concluded that mine tailings alone and mixed with fly ash mine wastes can be favourably used as road embankment materials cost-effectively and sustainably. Also, the coal mine waste rocks (CMWR) wastes were successfully interred for the production of eco-friendly fired bricks at a laboratory scale [10,11], in the production of cement [12,13] and asphalt concrete products [14,15].…”

Section: Introductionmentioning

confidence: 99%

Sustainable Reuse of Coal Mine Waste: Experimental and Economic Assessments for Embankments and Pavement Layer Applications in Morocco

et al. 2020

Self Cite

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This paper deals with the potential reuse of coal mine waste rocks (CMWR) as an alternative material for road construction to conserve the natural resources and sustainable management of mining waste. The investigation was conducted through the determination of the chemical, mineralogical, geotechnical properties, and acid mine drainage formulation of CMWR as well as economic feasibility. This waste was used either alone for embankments and mixed with stabilizing agents fly ash (FA) and hydraulic road binder (HRB) for pavement applications. The experimental results confirmed that weathered CMWR can be successfully used alone as a sustainable alternative material for the embankment. Furthermore, the use of stabilizing agents in the following ratio CMWR:FA:HRB = 80:20:5 allow the use of CMWR in road sub-base layers for high-traffic pavements. Also, the environmental investigations showed that CMWR does not present any potential contaminating risk on the surrounding environment and most of the pyrite particles were already oxidized. Therefore, the environmental impact of acid mine drainage produced by pyritic waste throughout its life cycle can be neglected. Finally, an economic case study confirmed the workability of CMWR reuse in a radius of 29 km around their dumps by resulting in a lower cost compared with conventional materials.

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“…To assure that using coal waste in mortar is environmentally friendly, rstly, the environmental impact of it should be controlled before investigating the technical properties. Noteworthy, TCLP is employed recently to estimate the heavy metal concentration of coal mining dumps (Adhikari and Mal, 2021;Taha et al 2018). In this investigation, the TCLP test was utilized to examine the environmental effect of coal waste binders (i.e., UCW and TCW) before and after use in the mortar mixtures.…”

Section: Tclp Test Resultsmentioning

confidence: 99%

“…Coal waste has previously been utilized as coarse and ne aggregates (Karimipour et al 2020;Karimaei et al 2020), as well as the partial replacement of cement in various applications, including soil stabilization (Afrakoti et al 2020), road subgrade (Shirin et al 2020), asphalt pavements (Ameli et al 2020), concrete blocks (Dos Santos et al 2013), red bricks (Taha et al 2018), concrete pavements (Shamsaei et al 2019;Hesami et al 2016), and mortar mixtures (Frías et al 2012). Considering previous researches, using untreated coal waste in soil stabilization enhanced mechanical properties over time (Afrakoti et al 2020).…”

Section: Literature Review Of Coal Wastementioning

confidence: 99%

Environmental-Friendly Mortar Produced with Treated and Untreated Coal Wastes as Cement Replacement Materials

Soltaninejad

Moshizi

et al. 2021

Preprint

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This study aims to examine the influence of untreated coal waste (UCW) and treated coal waste (TCW) as supplementary cementitious materials (SCMs) on the environmental, mechanical, durability, and microstructural characteristics of mortar mixes. UCW preparation procedure consists of sequential steps of crushing and grinding. Afterward, UCW is thermally activated through incinerating at 750°C to be promoted to TCW. Experimental work includes mixing mortar mixtures by partially replacing cement with the coal waste binders (UCW and TCW) at different incorporation levels of 4, 8, 12, and 16% of cement weight. Toxicity characteristic leaching procedure (TCLP) test was applied to investigate the environmental impacts of coal wastes. TCLP test results pointed out that heavy metals including Manganese, Cadmium, Lead, and Chromium could successfully entrap in the cement matrix. The compressive and flexural strengths as mechanical characteristics of mortar mixtures were determined at 3, 7, 28, 90, and 180 curing days. Moreover, the mortar specimens were immersed in 3% sulfuric acid (H2SO4) for 60 and 150 days. Durability results showed that the H2SO4 attack resistance of binary cement mortars containing 4% coal waste binders was better than the plain mortar. Based on the scanning electron microscopy (SEM) images, ettringite was found as the main hydration product of binary cement after 28 days; however, the existence of calcium silicate hydrate (CSH) and calcium hydroxide (Ca(OH)2) in the cement matrix of mixes after 90 days explains the more compact microstructure attained by using coal waste as cement replacement materials compared to control mixtures.

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Leaching and geochemical behavior of fired bricks containing coal wastes

Cited by 39 publications

References 15 publications

Banner Waste Mixture: The Impact on Quality of Traditional Brick’s Compressive Strength

Banner Waste Mixture: The Impact on Quality of Traditional Brick’s Compressive Strength

Sustainable Reuse of Coal Mine Waste: Experimental and Economic Assessments for Embankments and Pavement Layer Applications in Morocco

Environmental-Friendly Mortar Produced with Treated and Untreated Coal Wastes as Cement Replacement Materials

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