Recycled glass as a supplementary filler material in spent coffee grounds geopolymers

Arulrajah, Arul; Kua, Teck-Ang; Horpibulsuk, Suksun; Mirzababaei, Mehdi; Chinkulkijniwat, Avirut

doi:10.1016/j.conbuildmat.2017.06.050

Cited by 66 publications

(20 citation statements)

References 58 publications

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“…In Australia, almost one million tons of glass waste is collected annually for recycling purposes [10]. However, the inconsistency in chemical composition and the presence of impurities make the glass recycling process difficult.…”

Section: Introductionmentioning

confidence: 99%

Sustainable Use of Recycled Glass Powder as Cement Replacement in Concrete

Tamanna¹,

Tuladhar²

2020

TOWMJ

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Aims: This paper introduces a sustainable way of using Recycled Glass Powder (RGP) as a cement replacement in concrete. Background: In Australia, almost one million tons of glass waste is collected annually for recycling purpose. However, the inconsistency in chemical composition and the presence of impurities make glass recycling process difficult. Besides, the lack of local recycling plants coupled with high transportation costs makes the recycling process expensive. Objective: For the successful use of recycled glass in concrete for industrial applications, it is therefore, important to characterize the physical and chemical properties of recycled glass collected by the local councils. Furthermore, the effects of replacement levels of cement with recycled glass on the strength and durability properties of concrete need to be assessed as well. Methods: Mechanical strength and durability properties of concrete with 10%, 20% and 30% of RGP as a partial cement replacement were tested and compared with typical concrete and fly ash blend concrete. The relative strength test of mortar was conducted to assess the reactivity of glass powder with the cement. Results: RGP concrete showed an improvement in strength over time like fly ash. Using RGP significantly improved the resistance against chloride penetration with increasing glass powder content. Furthermore, RGP also met the relative strength requirement as per Australian Standard requirement to be considered as a supplementary cementitious material. Conclusion: This research showed that the use of RGP as cement replacement is feasible for replacement level up to 10%. The outcome of this research aims to contribute towards sustainable development by reducing the consumption of cement, as well as reduction of glass waste going into landfill.

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Section: Introductionmentioning

confidence: 99%

Sustainable Use of Recycled Glass Powder as Cement Replacement in Concrete

Tamanna¹,

Tuladhar²

2020

TOWMJ

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“…For example, GGBS has been successfully used to partially substitute cement in the low permeability cutoff walls (Jefferis 2012). The recently developed geopolymer also can be potentially applied to cutoff walls as an innovative construction material (Arulrajah et al 2017a;Arulrajah et al 2017b;Lam and Jefferis 2017).…”

Section: Introductionmentioning

confidence: 99%

Engineering Properties of Vertical Cutoff Walls Consisting of Reactive Magnesia-Activated Slag and Bentonite: Workability, Strength, and Hydraulic Conductivity

Hao

Jin

et al. 2019

J. Mater. Civ. Eng.

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The soil-cement-bentonite (SCB) vertical cutoff walls are commonly used to control flow of contaminated groundwater in polluted sites. However, conventional backfill consisting of Ordinary Portland cement (OPC) is associated with relatively high CO2 footprint. Potential chemical interactions between OPC and bentonite could also undermine the long-term durability of SCB materials. In this paper, we propose an innovative backfill material for cutoff walls, which is composed of MgO-activated ground granulated blast furnace slag (GGBS), bentonite and soil. The OPC-soil, OPC-bentonite-soil, and OPC-GGBS-bentonite-soil backfill materials are also tested for comparison purpose. Workability of the fresh backfills and unconfined compressive strength of aged backfills are investigated. The hydraulic conductivities of aged backfills permeated with tap water, Na2SO4 and Pb-Zn solutions are assessed. The unconfined compressive strength and hydraulic conductivity of the proposed backfill permeated with tap water for the backfills are in the range of 230-520 kPa and 1.1×10-10-6.3×10-10 m/s at 90-day-curing, respectively, depending on the mix composition. The hydraulic conductivity of the proposed MgO-GGBS-bentonite-soil backfill permeated with sodium sulfate (Na2SO4) or lead-zinc (Pb-Zn) solution is well below the commonly used limit, while the OPC-bentonite-soil backfill shows a significant loss in its impermeability. Environmental and economic analyses indicate that, compared with the conventional backfill made from the OPC-bentonite-soil mixture, the proposed backfill reduces approximately 84.7%-85.1% in CO2 emissions and 15.3%-16.9% cost. The environmental and economic advantages will 3 promote the utilization of MgO-activated GGBS-bentonite mixtures in the cutoff walls and further advocate its application in land remediation projects.

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“…Other authors have already studied the role of different kind of glass cullet in geopolymers, such as glass containers coming from urban collection [13], bottle glass [14], fluorescent lamps [15], liquid crystal display glass [16], glasses derived from the vitrification of municipal residues [17], and waste from demolitions [18], demonstrating the feasibility of using recycled glass in geopolymers. To the authors' knowledge, no papers focused on CRT glasses were found.…”

Section: Introductionmentioning

confidence: 99%

Addition of WEEE Glass to Metakaolin-Based Geopolymeric Binder: A Cytotoxicity Study

2017

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Waste Electrical and Electronic Equipment (WEEE) types of glass, including Cathode Ray Tube (CRT) glass, are now separately collected in European Union 28 (EU28) zone. Due to the high level of Pb and Ba in their compositions, this type of waste finds its way to the disposal. In the present research, a geopolymer matrix based on metakaolin is used to blend in fine powder panel and funnel glass from personal computer (PC) and television (TV) monitors. Such waste glass, which cannot be directed to glass melting furnaces, is safely incorporated into a geopolymer matrix. The consolidation of the geopolymeric matrix containing the waste glass was followed by pH and conductibility up to 28 days of curing. Scanning electron microscope equipped with energy dispersive spectroscopy (SEM/EDS) was used to obtain information on the microstructure of the consolidated products. Cytotoxicity tests helped the environmental evaluation of these materials.

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Recycled glass as a supplementary filler material in spent coffee grounds geopolymers

Cited by 66 publications

References 58 publications

Sustainable Use of Recycled Glass Powder as Cement Replacement in Concrete

Sustainable Use of Recycled Glass Powder as Cement Replacement in Concrete

Engineering Properties of Vertical Cutoff Walls Consisting of Reactive Magnesia-Activated Slag and Bentonite: Workability, Strength, and Hydraulic Conductivity

Addition of WEEE Glass to Metakaolin-Based Geopolymeric Binder: A Cytotoxicity Study

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