Cork waste in cement based materials

Matos, Ana Mafalda; Nunes, Sandra; Coutinho, Joana Sousa

doi:10.1016/j.matdes.2015.06.082

Cited by 38 publications

(22 citation statements)

References 17 publications

(20 reference statements)

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“…At present, cork is used in a wide range of application in the building as a solution of lightweight, thermal insulation and shows good environmental advantages [13,14].…”

Section: Ricon19 -Remine International Conferencementioning

confidence: 99%

Development of Alkali-activated Foamed Lightweight Mortar Tungsten Mining Waste Mud-based Incorporating Expanded Cork

Beghoura

Castro-Gomes

2020

KEG

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In this study, an Alkali-activation of tungsten mining waste mud (TMWM) was combined with aluminium powder (Al) as a blowing agent (gas foaming method). The synthesis of inorganic alkali-activated foamed mortar (AA-FM) and alkali-activated lightweight foamed mortar (AALW-FM) was achieved by incorporating expanded granulated cork (EGC) and one type of river sand < 2 mm. Al powder was added first to the dry mix with the mass used varying from 0.1 g to 0.5 g. Precursors and activators were included to produce a homogeneous mixture, which was placed into a mould (100x100x60 mm3), and cured in the oven at 60° C for 24 hours. The influence of two main parameters (Al powder contents and cork particles) on the AA-FM and AALW-FM properties (compressive strength, density, expansion volume and pore size distribution) were investigated. The compressive strength of the foams in the case of highly porous structures of the AALW-FM and AA-FM achieved 4.1MPa and 13.2MPa respectively, for samples with a larger amount of Al powder (0.5g). Open celled hardened of the AALW-FM and AA-FM with 0.5g Al shows a high porosity of 40% and 81% respectively. Therefore, tungsten mining waste-based alkali-activated foams shows potential as a thermal insulation material in certain situations. Keywords: Tungsten mining waste, Alkali-activated, Foamed Materials

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“…At present, cork is used in a wide range of application in the building as a solution of lightweight, thermal insulation and shows good environmental advantages [13,14].…”

Section: Ricon19 -Remine International Conferencementioning

confidence: 99%

Development of Alkali-activated Foamed Lightweight Mortar Tungsten Mining Waste Mud-based Incorporating Expanded Cork

Beghoura

Castro-Gomes

2020

KEG

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“…Europe produces more than 80% of the worldwide production, and annually 68,000 to 85,000 tons are considered waste materials [56]. Around 20% to 30% of the raw cork received at the processing units is discarded, mainly as cork dust [59]. That cork powder is generated from grinding, cutting and finishing operations throughout the industrial cork process [60].…”

Section: Cork Waste Ash (Cwa)mentioning

confidence: 99%

Plant biomass ashes in cement-based building materials. Feasibility as eco-efficient structural mortars and grouts

González-Kunz

Pineda

Brás

et al. 2017

Sustainable Cities and Society

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“…Both the manufacturing of cork stoppers and the formation of cork agglomerates produce waste, essentially rejected material that represents 20–30% of the industry’s raw cork feed [ 4 ]. Cork powder or dust, which makes up most of the cork waste, is usually burned to produce energy, while the remaining rejected granulate is reused in the manufacturing process.…”

Section: Introductionmentioning

confidence: 99%

“…Cork powder or dust, which makes up most of the cork waste, is usually burned to produce energy, while the remaining rejected granulate is reused in the manufacturing process. Though mostly recycled in some form, cork waste remains a by-product of the cork industry with a low commercial value [ 4 , 5 ].…”

Section: Introductionmentioning

confidence: 99%

Valorization of Cork Using Subcritical Water

et al. 2020

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Granulated cork was submitted to subcritical water extraction/hydrolysis in a semi-continuous reactor at temperatures in the range of 120–200 °C and with a constant pressure of 100 bar. The influence of temperature on the composition of the cork extracts obtained was assessed—namely, their content of carbohydrates and phenolics. The extraction yield increased with the temperature, and this was associated with the decrease in the dielectric constant of water and the increase in its ionic product. Extracts composed of up to 36% phenolics were obtained at temperatures of up to 120 °C, with an antioxidant activity only two times lower than that of pure gallic acid, but in low amounts. Assays at higher temperatures generated extracts richer in carbohydrates and with a phenolics content of ca. 20 wt.% in comparatively far higher amounts. Neither the amount of suberin nor its structure were affected by the subcritical water treatment.

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Cork waste in cement based materials

Cited by 38 publications

References 17 publications

Development of Alkali-activated Foamed Lightweight Mortar Tungsten Mining Waste Mud-based Incorporating Expanded Cork

Development of Alkali-activated Foamed Lightweight Mortar Tungsten Mining Waste Mud-based Incorporating Expanded Cork

Plant biomass ashes in cement-based building materials. Feasibility as eco-efficient structural mortars and grouts

Valorization of Cork Using Subcritical Water

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