A novel approach for the development of sustainable hybridized geopolymer mortar from waste printed circuit boards

Kakria, Kunal; Thirumalini, S.; Secco, Michele; Shanmugapriya, T.

doi:10.1016/j.resconrec.2020.105066

Cited by 29 publications

(6 citation statements)

References 35 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…NMP microstructure confirms the existence of a fibrous particulate fraction in the shape of small rod-like structures, which helps in achieving good flexural strength. A previous study conducted by same authors (Kakria et al [42]) on leachate studies of NMP confirmed that the heavy metal concentration was under the permissible limits after comparing with regulations given in EN 12457-2 (2002) [43].…”

Section: Characterization Of Raw Materialsmentioning

confidence: 63%

“…NMP consists of more fine and fibrous particles, and acts as an effective filler material that enhances the strength parameter in concrete [46]. There was a drop in the compressive strength beyond 15% addition of NMP for mix M0N15 due to the poor bonding of NMP fibres in the mix [42]. Further, the combined addition of MK and NMP leads to the improved efficacy of compressive performance, and the maximum compressive strength was found in mix M10N10 with 48.4 N/mm 2 , which is 39.8% more than the reference mix.…”

Section: Compressive Strengthmentioning

confidence: 99%

See 1 more Smart Citation

Use of E-Waste in Metakaolin Blended Cement Concrete for Sustainable Construction

et al. 2022

Self Cite

View full text Add to dashboard Cite

This paper investigates the use of non-metallic portion (NMP) reclaimed from e-waste (i.e., waste printed circuit board—PCB) as replacement of natural sand in the blended cement concrete by using Metakaolin (MK) as supplementary cementitious material for its effect on the mechanical, durability, microstructural, and mineralogical properties of concrete. It was found that the blended mixes containing NMP and MK outperformed the control mix. With the addition of 10% NMP and 10% MK, the maximum compressive strength was obtained, with the splitting tensile and flexural strength following the same trend. The performance of the mixes was lowered above 10% replacement levels, although it was still better than the control mixture. When compared to other mixes, 10% NMP and 10% MK concrete had the lowest sorptivity and water absorption values, as well as the highest resistance to chloride-ion penetration. FESEM was used to confirm the results, and then XRD was used to determine the elemental classification. This study lays the groundwork for a long-term strategy for utilising NMP and MK as extremely effective concrete additives.

show abstract

Section: Characterization Of Raw Materialsmentioning

confidence: 63%

Section: Compressive Strengthmentioning

confidence: 99%

Use of E-Waste in Metakaolin Blended Cement Concrete for Sustainable Construction

et al. 2022

Self Cite

View full text Add to dashboard Cite

show abstract

“…With the help of geopolymer material, this can be achieved which offers several advantages over traditional cement-based materials, including lower carbon emissions during production and greater strength development [2]. Geopolymer binder is formed through a chemical reaction between source materials rich in silica and aluminum, such as fly ash, metakaolin slag, or clay, and alkaline activators like sodium or potassium silicate solutions [3,4]. Agro and industrial waste in geopolymer proved to be a promising material for the reduction of dependency on conventional binders.…”

Section: Introductionmentioning

confidence: 99%

Experimental investigation on trinary blended geopolymer mortar synthesized from Industrial-agro and municipal solid waste ash subjected to different acid exposure

Tipraj,

Shanmugapriya

2023

Mater. Res. Express

View full text Add to dashboard Cite

Geopolymer binders prove to be a reliable option to avoid dependency on conventional binders, and reduce the burden on the environment. The current study assesses the durability characteristics of a developed mortar made from a combination of Granulated blast furnace slag (GBFS), Sugar cane bagasse ash (SCBA), and Municipal solid waste ash (MSWA). The Geopolymer mortar specimens were cured under ambient conditions after the ternary blended mix had been activated by a solution of sodium silicate and sodium hydroxide of 8 M (SS/SH-2.5). Mass loss and compressive strength were measured at various time regimes of acid attack studies under mild concentrations of 3% sulphuric acid, hydrochloric acid, and nitric acid. The durability, macroscopic, microscopic, and morphological, studies were carried out. The results indicated that trinary blended geopolymer mortar exposed to sulphuric acid showed less mass loss and high compressive strength retention compared to the control mortar. The nitric acid exposure exhibited comparable strength loss for the trinary blend with control mortar and hydrochloric acid showed negligible effect on mortar. Mass loss was more significant in sulfuric acid than the hydrochloric and nitric acid. RCPT and Carbonation tests revealed that geopolymer mortar exhibits moderate chlorine ion penetration and the ingress of CO2 was less in the trinary blend mix. The mineralogical studies showed the formation of gypsum, nitrate, and chloride products. The optical microscopic image revealed the ingress of sulfuric acid is more intense in the mortar compared to hydrochloric and nitric acid and microstructural studies witnessed the degradation of C-A-S-H supported by EDX.

show abstract

“…Br-fixing was achieved by bromination of oxides as LaOBr, CuBr2, CaBr2, FeBr2 were found in the solid residues of pyrolysis. Many studies have shown that by choosing the right reagent, co-pyrolysis could not only reduce Br release into pyrolysis products but also induce higher yield of valuable oil or change the properties of solid residues (Kakria et al 2020).…”

Section: Introductionmentioning

confidence: 99%

Co-pyrolysis of waste printed circuit boards with iron compounds for Br-fixing and material recovery

Chen

Shu

et al. 2021

Environ Sci Pollut Res

View full text Add to dashboard Cite

Waste printed circuit board was co-pyrolyzed with iron oxides and iron salts.Solid, liquid and gaseous products were collected and characterized. Co-pyrolysis with FeCl2, FeCl3 or FeSO4 was able to increase the yield of liquid product which was rich in phenol and its homologues. Also, the addition of co-pyrolysis reagents reduced the release of brominated organics to liquid as Br was either fixed as FeBr3 in solids or released as HBr. In particular, FeCl2 showed the best ability to reduce the release of Brcontaining organics to liquid compared with FeCl3 and FeSO4. Solid residuals were rich in iron oxides, glass fibers and charred organics with surface areas of 20.6-26.5 m 2 /g. CO2 together with a small amount of CH4 and H2 were detected in the gaseous products. Overall, co-pyrolysis could improve the quantity and quality of liquid oil which could be reused as chemical or energy sources. Pyrolysis of waste printed circuit board was promising as a method for recycling.

show abstract

A novel approach for the development of sustainable hybridized geopolymer mortar from waste printed circuit boards

Cited by 29 publications

References 35 publications

Use of E-Waste in Metakaolin Blended Cement Concrete for Sustainable Construction

Use of E-Waste in Metakaolin Blended Cement Concrete for Sustainable Construction

Experimental investigation on trinary blended geopolymer mortar synthesized from Industrial-agro and municipal solid waste ash subjected to different acid exposure

Co-pyrolysis of waste printed circuit boards with iron compounds for Br-fixing and material recovery

Contact Info

Product

Resources

About