Environmental characterization of Foundry Waste Sand (WFS) in hot mix asphalt (HMA) mixtures

Dyer, Paulo Paiva Oliveira Leite; Lima, Maryangela Geimba de; Klinsky, Luis Miguel Gutiérrez; Silva, Silvelene A.; Coppio, Gustavo Lauer

doi:10.1016/j.conbuildmat.2018.03.151

Cited by 52 publications

(11 citation statements)

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“…Consequently, new techniques and research have developed to use the CDW as a NA replacement [8][9][10][11][12][13][14][15][16][17][18][19][20]. Great advantages are obtained from the use of CDW as a partial or total replacement of NA.…”

Section: Introductionmentioning

confidence: 99%

Influence of Partial Coarse Fraction Substitution of Natural Aggregate by Recycled Concrete Aggregate in Hot Asphalt Mixtures

et al. 2019

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The main objective of this work is to evaluate the properties of hot asphalt mixtures that have been manufactured with different recycled concrete aggregate (RCA) percentages (0%, 20%, 40%, 60% and 80% of the fraction 5–13 mm) and asphalt (4%, 4.5% and 5%). Dense asphalt mixtures were made; partially replacing the natural aggregate (NA) fraction between 5 and 13 mm. Marshall specimens were manufactured to determine the main properties of the asphalt concrete (AC) in terms of density, voids, stability and deformation. Additionally, the optimal asphalt content (OAC) was determined, and measured the water sensibility, the stiffness modulus and the permanent deformation. The results corroborate the potential for using these sources of construction and demolition waste (CDW) as a RCA in asphalt concrete and show that the hot asphalt mixtures with up to 40% substitution of natural aggregate by recycled aggregate in the fraction 5–13 mm present good behavior.

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Section: Introductionmentioning

confidence: 99%

Influence of Partial Coarse Fraction Substitution of Natural Aggregate by Recycled Concrete Aggregate in Hot Asphalt Mixtures

et al. 2019

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“…The FLV values of the WFS blends were higher than the PC blends, which characterises a higher AC consumption of these blends. In summary, the use of WFS decreased the stability of blends [6,8,10,12,32] while increasing their fluency. This latter is in disagreement with that observed by the author cited previously.…”

Section: Mechanical Characteristics Of Mixturesmentioning

confidence: 99%

“…The moisture content as received for WFS were reported to be in the range of 0.0-4.85% [8,17,18]. Concerning absorption, the values are relatively higher than those obtained for the natural aggregate, due to the presence of organic matter [6,8]. The percentage absorption values on WFS samples have been reported to vary between 0.3 and 6.2% [3,8,17].…”

Section: Literature Reviewmentioning

confidence: 99%

“…The steel industry produces a myriad of metal components for industrial chains such as the automobile industry, which in turn generates mineral discarded sand moulds (waste foundry sand/WFS) that end up occupying large volumes in landfills [6]. The major portion of the WFS is considered as non-hazardous waste and is currently deposited in a special WFS landfill that is remote from areas of settlement [7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

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Use of Waste Foundry Sand (WFS) as Filler in Hot-Mixed Asphalt Concrete

Campelo¹,

Costa²,

Vieira³

et al. 2020

Sandy Materials in Civil Engineering - Usage and Management

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The environmental issue has become a topic of relevant discussion in modern society, given the current awareness that construction inputs are finite, and a large amount of waste can be reused as a building material in engineering works. The products used in foundry industry can be non ferrous and ferrous and the residue produced by this last one is not potentially hazardous to human health. The waste foundry sand (WFS) fits this reuse and can be employed in asphalt mixtures, in partial or complete replacement of the conventional filler, i.e. Portland cement (PC). In this sense, this work analyses five asphalt mixtures, one using 100% CP (reference mixture) as filler, and the other four using WFS in proportions of 25-100%, every 25% of the total amount, in 5% (in mass) of the maximum replacement. The mixtures were physically and mechanically characterised according to the Marshall methodology and subsequently submitted to the tests of static indirect tensile strength (static ITS), resilient modulus (RM), repeated-load indirect fatigue (fatigue life) and unconfined static creep. The results of the tests showed that all mixtures with WFS residue presented physical and mechanical parameters within Brazilian standards following the Marshall methodology.

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“…A areia utilizada no processo é reutilizada diversas vezes, até ser considerada inadequada e descartada [11]. Estudos foram realizados para avaliar a viabilidade de se utilizar este resíduo como matéria-prima em diferentes produtos, como concreto, argamassa, asfalto, vidros e, em poucos casos, pigmentos cerâmicos [12][13][14][15][16][17][18][19][20]. A utilização da ADF no campo da construção civil já é bem consolidada, existindo normas específicas de uso [10,21], contudo seu uso na obtenção de pigmentos cerâmicos ainda é pouco explorado.…”

Section: Introductionunclassified

Síntese de pigmentos de níquel utilizando areia descartada de fundição como fonte de sílica

2019

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Resumo Sintetizaram-se pigmentos do sistema Zn2-xNixSiO4 variando a proporção molar de zinco e níquel, partindo da estrutura willemita (Zn2SiO4) à olivina (Ni2SiO4), usando areia descartada de fundição (ADF) e sílica comercial como fontes de SiO2. A ADF foi caracterizada por análise química e DRX. A síntese dos pigmentos seguiu rota cerâmica, com x = 0, 0,5, 1, 1,5 e 2,0 mol e calcinação a 1200 °C. Os pigmentos foram caracterizados mediante DRX e medidas colorimétricas. Os resultados mostraram que, apesar da presença de alumina e ferro na ADF, as fases cristalinas e cor dos pigmentos foram similares para ambas as fontes de sílica. Teores menores de níquel favoreceram a formação de willemita e maiores a de olivina. Todos os pigmentos (com e sem ADF) dispersos em dois esmaltes e queimados em forno semi-industrial desenvolveram coloração marrom, indicando instabilidade destes nas matrizes usadas, mas confirmando a viabilidade de substituição da sílica comercial por ADF.

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Environmental characterization of Foundry Waste Sand (WFS) in hot mix asphalt (HMA) mixtures

Cited by 52 publications

References 1 publication

Influence of Partial Coarse Fraction Substitution of Natural Aggregate by Recycled Concrete Aggregate in Hot Asphalt Mixtures

Influence of Partial Coarse Fraction Substitution of Natural Aggregate by Recycled Concrete Aggregate in Hot Asphalt Mixtures

Use of Waste Foundry Sand (WFS) as Filler in Hot-Mixed Asphalt Concrete

Síntese de pigmentos de níquel utilizando areia descartada de fundição como fonte de sílica

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