Recycling paper industry effluent sludge for use in mortars: A sustainability perspective

Azevedo, Afonso Rangel Garcez de; Alexandre, Jonas; Xavier, Gustavo de Castro; Pedroti, Leonardo Gonçalves

doi:10.1016/j.jclepro.2018.05.011

Cited by 109 publications

(32 citation statements)

References 66 publications

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“…Recent research has evaluated the application of industrial solid residues in ceramic matrices, as a way of improving its technological properties [3]. Alternatives have been proposed for residues, such as cement matrix additions including concretes and mortars [4,5], as well as fillers in blocks of cement soil [6,7].…”

Section: Introductionmentioning

confidence: 99%

Effect of Granite Residue Incorporation on the Behavior of Mortars

et al. 2019

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Civil construction is one of the most resource-consuming sectors in the world. For this reason, the last years have witnessed the study of reusing industrial residues in building materials. The ornamental stone processing industry has a considerable environmental liability related to residue generation during the cutting stages of granite blocks. The objective of this work is to analyze the viability of incorporating granite residues, up to 100%, to substitute sand in coating mortars for building construction. Mortars without residue, as control, and incorporated with 20, 40, 60, 80, and 100% of granite residue were subjected to consistency tests, incorporated air and water retention together with the rheological characterization using the squeeze-flow and the dropping-ball methods. The results show that mortars with 40% granite residues presented greater plastic deformation, helping their applicability by also presenting improved technological properties in the fresh state.

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Section: Introductionmentioning

confidence: 99%

Effect of Granite Residue Incorporation on the Behavior of Mortars

et al. 2019

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“…O setor cerâmico está buscando a otimização do processo industrial com o intuito de aprimorar a qualidade de seus produtos e se tornar mais competitivo nos mercados nacional e internacional. Para isso, a preocupação com a energia e o meio ambiente se torna importante [7,18]. Um setor da indústria cerâmica é o da produção de cerâmicas porosas, que vem apresentando grande potencial nos processos de filtração de gases quentes, refino e purificação, combustão catalítica e recuperação de vapor [19][20][21][22].…”

Section: Introductionunclassified

Efeito da temperatura de sinterização e da adição de fibras poliméricas em cerâmica porosa obtida a partir de resíduos do processo Kraft

et al. 2019

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Resumo O processo Kraft gera resíduos que podem ser aplicados em diversos processos produtivos, substituindo matérias-primas comerciais, como lama de cal e areia, ricos em carbonato de cálcio e sílica, respectivamente. Neste trabalho foi realizado um estudo para obtenção de cerâmicas porosas a partir da valorização desses resíduos, utilizando-se fibras poliméricas para a interconectividade dos poros. Conforme NBR 10004, os resíduos classificaram-se como não perigosos e inertes (classe II-B). Variaram-se três teores de fibras (12, 20 e 28 vol%) e três temperaturas de queima (1100, 1130 e 1160 ºC). As cerâmicas porosas confeccionadas apresentaram porosidade total de 39% a 53%, resistência à compressão de 15 a 52 MPa e tamanho médio de poros de 2,0 a 7,5 µm. Classificaram-se como cerâmicas para microfiltração, abrangendo filtração de água e gases quentes (aerossóis). A formulação com teor de 28 vol% de fibras e sinterizada a 1160 ºC apresentou melhor relação porosidade/resistência mecânica.

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“…The mortars prepared in this study have a 1:1:6 ratio among their constituents in volume (cement: hydrated lime: sand), and these percentages of the materials suggest an optimization of their technological parameters (Azevedo et al, 2018), besides being the most used in the Brazilian civil construction. Two different sets of mortars containing pineapple crown fiber were prepared: with incorporation of 2.5, 5, 7.5 and 10% of natural fiber and with the same percentages, but with treated fibers.…”

Section: Methodsmentioning

confidence: 87%

Development of mortar for laying and coating with pineapple fibers

Azevedo

Marvila

Zanelato

et al. 2020

Rev. bras. eng. agríc. ambient.

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Brazil is one of the largest producers of pineapple in the world, which, in addition to bringing substantial benefits, contributes to increasing waste generation in the stages of processing, aiming at its consumption. The Brazilian environmental legislation has been increasingly more restrictive with respect to the disposal of solid waste, whether domestic, industrial or agro-industrial, which has stimulated studies related to the use of these materials in several matrices. This study aimed to evaluate the potentiality of using the natural fiber of pineapple (Ananas comosus), extracted from its leaves, as reinforcing material in cementitious composites. For this purpose, natural fiber extracted from the pineapple crown was incorporated in different percentages in relation to the cement mass: 0, 2.5, 5, 7.5 and 10%, and the fibers obtained were submerged in aqueous NaOH solution with 5% concentration in volume, for 1 h at room temperature. The following variables were evaluated: consistency, water retention, incorporated air, mass density in hardened state, mechanical strength, water absorption by immersion and capillarity, besides verifying the influence of the mode of fiber incorporation. It was observed that the treatment with NaOH solution and the percentage of natural pineapple fiber incorporated in up to 5% in relation to the cement mass form mortars with technological feasibility.

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Recycling paper industry effluent sludge for use in mortars: A sustainability perspective

Cited by 109 publications

References 66 publications

Effect of Granite Residue Incorporation on the Behavior of Mortars

Effect of Granite Residue Incorporation on the Behavior of Mortars

Efeito da temperatura de sinterização e da adição de fibras poliméricas em cerâmica porosa obtida a partir de resíduos do processo Kraft

Development of mortar for laying and coating with pineapple fibers

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