Carbon dioxide sequestration of concrete slurry waste and its valorisation in construction products

Xuan, Dongxing; Zhan, Baojian; Poon, Chi Sun; Zheng, Wei

doi:10.1016/j.conbuildmat.2016.03.109

Cited by 125 publications

(31 citation statements)

References 41 publications

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“…In recent years, the concept of circular economy has been popularized, so it has become a hot research topic to use other industrial waste, such as forest waste bottom ash (Garcia and Sousa-Coutinho, 2013), off-white rice husk ash (Ferraro and Nanni, 2012) and the solid waste such as recycled aggregate (Corinaldesi and Moriconi, 2009), slag waste and glass sludge waste (Lee et al, 2018), to change the properties of concrete. Researchers also concern about the carbon sequestration of concrete slurry waste and its valorization in construction products (Xuan et al, 2016). Other new material such as Hemp-lime concrete (Walker and Pavía, 2014) and fiber-reinforced concrete (Nematollahi et al, 2014) and nano-cementitious concrete (Lim et al, 2018) are also insight the green potential of the concrete industry.…”

Section: Methodsmentioning

confidence: 99%

A holistic review of research on carbon emissions of green building construction industry

Wei

Tam

Chen

et al. 2020

ECAM

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Purpose Addressing global warming challenge, carbon emissions reduction potential of the construction industry has received additional attentions. The decoupling of construction industry and carbon emissions through policies, technologies and model innovations is an effective way for reducing environmental pollution and achieve eco-urban target. The paper aims to discuss these issues. Design/methodology/approach Within the scope of green building carbon emissions (GB-CO2) research, a large number of scientific literature has been published in construction discipline over the past few decades. However, it seems that a systematic summary of strategies, techniques, models and scientific discussion of future direction of GB-CO2 is lacking. Therefore, this paper carries out data mining on authoritative journals, identified the key research topics, active research areas and further research trends through visualization studies. Findings This study contributes to the body of knowledge in GB-CO2 by critically reviewing and summarizing: professional high-quality journals have a greater influence in the scope of research, developed countries and developing countries are all very concerned about sustainable buildings, and the current hot topics of research focus on the application of the life cycle models, energy efficiency, environmental performance of concrete material, etc. Moreover, further research areas that could expand the knowledge of cross-national long-term carbon mechanisms, develop comprehensive life cycle carbon emissions assessment models, build technical standards and tests for the sustainable building material and systems, and exploit multi-objective decision models considering decarbonizing design and renewable energy. Originality/value This study is of value in systematic insight the state-of-the-art of GB-CO2 research in the more recent decade. A more vividly and effectively method is documented in extending the traditional bibliometric review to a deeper discussion. This study can also benefit construction practitioners by providing them a focused perspective of strategy and technologies innovations for emerging practices in green building projects.

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Section: Methodsmentioning

confidence: 99%

A holistic review of research on carbon emissions of green building construction industry

Wei

Tam

Chen

et al. 2020

ECAM

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“…O resíduo sedimentado no fundo dos tanques é periodicamente dragado e colocado em baias de secagem para posterior disposição em aterros sanitários (SEALEY; PHILLIPS; HILL, 2001). Vale ressaltar ainda que este método pode ser combinado com sistemas de recuperação de agregados e de filtragem dos sólidos decantados (XUAN et al, 2016a;WANG, ZHANG;2018)) (Figura 4). O material recém dragado ou filtrado é composto, basicamente, por altos teores de água (variando entre 50 a 150% a depender do método de obtenção), agregado residual do concreto original e pasta de cimento, formando assim uma pasta com certa fluidez.…”

Section: Gestão De Resíduos Em Usinas Dosadoras De Concretounclassified

“…A quantidade de CaO presente na LRC-S (13,5% -66,3%) é menor que a do CP I (64,5%) porque parte dos hidratos e do hidróxido de cálcio (Ca(OH) 2 ) permanecem em solução na água residuária e são perdidos com o fluxo de água (WANG; ZHANG, 2018). Já os maiores teores de SiO 2 (24,5% -69,7%) em relação ao CP I (19,3%) é explicada pela presença de areia remanescente do concreto original (XUAN et al, 2016a). Verifica-se também que a perda ao fogo (LOI) da LRC-S (6,8% -23,3%) é mais alta do que a do cimento Portland (1,0%).…”

Section: Caracterização Da Lama Residual De Concreto Seca (Lrc-s)unclassified

“…Os autores atribuíram esse comportamento à presença de cimento não hidratado e ao efeito filer desempenhado pelo resíduo estudado. Em estudos recentes, Xuan et al (2016a) e Xuan et al (2016b) também propuseram a utilização da LRC em blocos de concreto, porém no estado pastoso. Os autores verificaram que a utilização da carbonatação acelerada como método de cura dos blocos produzidos com a lama residual de concreto ainda pastosa (LRC-P) pode influenciar positivamente a sua resistência à compressão.…”

Section: Resistência à Compressão Simplesunclassified

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Resíduos de usinas de concreto como material alternativo para produção de produtos cimentícios: mapeamento sistemático

Bonfim

Carvalho

Moura³

et al. 2021

REC

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A lama residual de concreto (LRC) é um resíduo cimentício proveniente do tratamento da água residuária gerada durante o processo de lavagem de pátios e caminhões betoneira em usinas dosadoras. Este resíduo é composto basicamente por água, agregados, pasta de cimento e aditivos utilizados para produção de concreto. Devido as suas características como, por exemplo, elevado pH e alto teor de sólidos suspensos, há de se ter um manejo adequado deste material, visto que, conforme a Resolução CONAMA nº 430, o lançamento de efluentes em solo não poderá representar riscos de poluição às águas superficiais e subterrâneas. Nota-se que nos últimos anos, tanto a academia, quanto a indústria, têm buscado encontrar soluções reduzam o impacto de algumas atividades produtivas sobre o meio ambiente. Assim sendo, este artigo tem como objetivo apresentar um panorama das pesquisas relacionadas com a incorporação da lama residual de concreto em produtos cimentícios. Para tanto, foi realizado um mapeamento sistemático da literatura através da base de dados Periódicos CAPES utilizando as strings de busca “concrete sludge” e “fresh concrete waste”, de forma a encontrar os principais estudos relacionados com a vertente estudada. Assim, através do mapeamento realizado foi possível perceber que, quando comparada com outros tipos de resíduos, o estudo da lama residual de concreto (LRC) ainda é recente e os impactos da sua utilização ainda não foram completamente esclarecidos, ressaltando assim a necessidade de novas pesquisas na área.

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“…Concrete is the second most used substance on Earth, its regional production is highly dependent on the actual economic situation, but global annual production is approximately 2.0 t per capita (Hasanbeigi, Price, & Lin, 2012;Liu et al, 2018). Unfortunately, it is estimated, that due to poor workmanship, composition modification, overordering and other related problems, in the range 1-4 wt.% of total concrete production result in waste (Xuan et al, 2016a(Xuan et al, , 2016b(Xuan et al, , 2016cKou, Zhan, & Poon, 2012). This fresh concrete is partially recycled by using techniques for aggregate reclaim, however fine residues are stocked in the pits, Figure 1, from which just batch water is reused (Correira et al, 2009).…”

Section: Introductionmentioning

confidence: 99%

Application of concrete slurry waste in cement screeds

Reiterman

Keppert

2019

Modern Building Materials, Structures and Techniques (MBMST)

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Sedimented concrete slurry waste (CSW), containing cement, mineral additives, fine fillers, admixtures and water, is currently a waste without an additional use and has to be fully landfilled. Current CSW management is very expensive and introduces number of environmental risks due to its high pH, exceeding 11.5. This paper deals with the application of two types of CSW as cement replacement in cement screed. The evaluation was carried out in terms of workability and basic mechanical performance of the obtained composites. The applied cement replacement was up to 10 wt.% due to the negative impact on the rheology of fresh mixtures. Reduced workability consequently caused higher content of air in the fresh mixture. It was reflected by lower values of bulk density in hardened state for both studied CSW. These aspects were the reasons of decreased mechanical performance by approximately 15% per 5 wt.% of replacement. Conducted experimental program declared significant limits of CSW application in cement based composites, however additional processing of CSW could significantly modify its properties.

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Carbon dioxide sequestration of concrete slurry waste and its valorisation in construction products

Cited by 125 publications

References 41 publications

A holistic review of research on carbon emissions of green building construction industry

A holistic review of research on carbon emissions of green building construction industry

Resíduos de usinas de concreto como material alternativo para produção de produtos cimentícios: mapeamento sistemático

Application of concrete slurry waste in cement screeds

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