Joint use of construction waste (CW) and sugarcane bagasse ash sand (SBAS) in concrete

Moretti, Juliana Petermann; Sales, Almir; Almeida, Fernando C.R.; Rezende, Mariana A.M.; Gromboni, Pedro Paulo

doi:10.1016/j.conbuildmat.2016.03.062

Cited by 58 publications

(17 citation statements)

References 16 publications

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“…To this end, the amount of OPC used in concrete needs to be reduced, as OPC is the major contributor to the carbon footprint of concrete. This can be realized by partially replacing OPC with minerals or fully replacing OPC with alternative non-OPC binders that have a lower carbon footprint [20][21][22]. Almost all of the published studies reported an enhancement in the mechanical properties of concrete, with up to a 10% replacement of OPC by different wastes [23][24][25], while a few papers also found an enhancement by splitting the tensile strength at a 15% replacement level [26,27].…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Calcium Oxide Nanoparticles from Industrial Waste on the Performance of Hardened Cement Pastes: Physicochemical Study

et al. 2020

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Large amounts of carbonated mud waste (CMW) require disposal during sugar manufacturing after the carbonation process. The lightweight of CMW enables its utilization as a partial replacement for the cement to reduce costs and CO2 emissions. Here, various levels of CMW, namely, 0, 5, 10, 15, 20, and 25 wt.% were applied to produce composite cement samples with ordinary Portland cement (OPC) as a regular mix design series. Pure calcium oxide (CaO) nanoparticles were obtained after the calcination of CMW. The techniques of X-ray fluorescence spectrometers (XRF), Transmission electron microscope (TEM), Selected area diffraction (SAED), Scanning electron microscope (SEM), energy dixpersive X-ray (EDX), and dynamic light scattering (DLS) were used to characterize the obtained CaO nanoparticles. According to the compressive strength and bulk density results, 15 wt.% CMW was optimal for the mix design. The specific surface area increased from 27.8 to 134.8 m2/g when the CMW was calcined to 600 °C. The compressive strength of the sample containing 15% CMW was lower than the values of the other pastes containing 5% and 10% CMW at all of the curing times. The porosity factor of the hardened cement pastes released with a curing time of up to 28 days. Excessive CMW of up to 25 wt.% reduced the properties of OPC.

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Section: Introductionmentioning

confidence: 99%

Evaluation of Calcium Oxide Nanoparticles from Industrial Waste on the Performance of Hardened Cement Pastes: Physicochemical Study

et al. 2020

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“…The physico-chemical properties of BFA and BBA are illustrated in Tables 1 and 2 respectively (Rachakornkij et al, 2004;Moretti et al, 2016).…”

Section: Tablementioning

confidence: 99%

A study on the potential uses of bottom and fly ash in Mauritius

Emamdee

Summoogum-Utchanah

2019

IJEWM

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Faced with demographic explosion and fuelled by its endeavours to become developed, Mauritius has seen a hike in its electricity consumption pattern. The bulk of electricity is generated by burning solid fuels which are namely coal and sugarcane bagasse. Consequently, ash is produced as waste product. Till date, both coal and bagasse ashes are being disposed of in a very unsustainable manner. Due to the availability of numerous studies on coal ash, focus has been laid on bagasse ash. This study analyses the possible ways of valorising bagasse bottom ash (BBA) and bagasse fly ash (BFA) better suited for the Mauritian context. A series of laboratory tests namely moisture content (MC), pH, electrical conductivity (EC), loss on ignition (LOI) and monitoring of the leaching behaviour of phosphate and nitrate were carried out. To monitor the leaching behaviour of nitrate and phosphate, a leaching model has been developed. Following the experimental analysis, several potential utilisation are put forward.

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“…A ACBC foi coletada das caldeiras de uma usina sucroalcooleira brasileira e moída em laboratório. Esse material é composto por 91% de SiO 2 e apresenta uma estrutura predominantemente cristalina [12]. A distribuição granulométrica dos materiais utilizados pode ser visualizada na Figura 1 e as características físicas estão apresentadas na Tabela 1.…”

Section: -Procedimentos Experimentaisunclassified

Betão auto-compactável com resíduo agroindustrial

Moretti¹,

Nunes²,

Sales³

2018

Libro De Comunicaciones / Livro Das Comunicações

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RESUMOA cinza que resulta da queima do bagaço da cana-de-açúcar (ACBC) é um resíduo agroindustrial gerado em larga escala no Brasil. Como alternativa de aplicação desse material, neste trabalho foi desenvolvido um betão auto-compactável (BAC) com a incorporação da ACBC. O programa experimental foi realizado segundo um plano fatorial em argamassas para optimizar a composição da pasta, que posteriormente foi verificada ao nível do betão. Foram adotados quatro parâmetros da mistura como variáveis independentes, nomeadamente, as relações água/cimento , água/finos, superplastificante/finos e ACBC/cimento. Após a definição das composições, diversas misturas de argamassa foram produzidas e realizaram-se os seguintes testes: espalhamento, fluidez, resistividade elétrica, resistência à compressão e porosidade acessível à água. Através de uma análise de regressão multilinear foram ajustados modelos numéricos aos dados experimentais. Por fim, foi possível optimizar uma mistura visando maximizar o teor de ACBC e atender aos requisitos de autocompactabilidade e durabilidade. Após essa etapa, foi produzido e caraterizado um BAC mantendo a composição da pasta. Por meio dos resultados obtidos pode-se concluir que a ACBC possui potencial para ser incorporada na fração dos finos na produção de BAC. PALAVRAS-CHAVE:cinza do bagaço da cana-de-açúcar, resíduo agroindustrial, betão autocompactável, plano fatorial. 1.-INTRODUÇÃOO Brasil é o maior produtor mundial no setor sucroalcooleiro e, dentre os principais resíduos gerados no processamento da cana-de-açúcar, destaca-se o bagaço. Esse resíduo é utilizado como biomassa para a geração de energia. Após a queima do bagaço, gera-se a cinza leve e cinza pesada. A cinza leve se acumula nos filtros das caldeiras e a cinza pesada, nomeada por Almeida et al.[1] como areia de cinza do bagaço da cana-de-açúcar (ACBC) é proveniente do fundo da caldeira. O manejo desses resíduos é um problema 117

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Joint use of construction waste (CW) and sugarcane bagasse ash sand (SBAS) in concrete

Cited by 58 publications

References 16 publications

Evaluation of Calcium Oxide Nanoparticles from Industrial Waste on the Performance of Hardened Cement Pastes: Physicochemical Study

Evaluation of Calcium Oxide Nanoparticles from Industrial Waste on the Performance of Hardened Cement Pastes: Physicochemical Study

A study on the potential uses of bottom and fly ash in Mauritius

Betão auto-compactável com resíduo agroindustrial

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