Reactive pozzolanas from rice husk ash: An alternative to cement for rural housing

Nair, Deepa G.; Jagadish, K. S.; Fraaij, A.L.A.

doi:10.1016/j.cemconres.2006.03.012

Cited by 126 publications

(58 citation statements)

References 10 publications

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“…A number of research studies on fiber-reinforced soils have recently been carried out through triaxial tests, unconfined compression tests, CBR tests, direct shear tests, and tensile and flexural strength tests (Freitag, 1986;Maher and Gray, 1990;Al-Refeai, 1991;Fatani et al, 1991;Maher and Ho, 1994;Ranjan et al, 1996;Nataraj and McManis, 1997;Consoli et al, 1998Consoli et al, , 2002Consoli et al, , 2005Santoni et al, 2001;Kumar et al, 2005;Casagrande et al, 2006Casagrande et al, , 2007aCasagrande et al, , 2007bKim et al, 2008;Park, 2008;Bera et al, 2009;Fatahi et al, 2012;Divya et al, 2014;Li et al, 2014;Anggraini et al, 2014;Botero et al, 2015). One of the primary advantages of randomly distributed fibers is the absence of potential planes of weakness that can develop parallel to oriented reinforcement (Maher and Gray, 1990).…”

Section: Fiber-reinforced Soilmentioning

confidence: 99%

Behavior of cement-stabilized fiber-reinforced pond ash, rice husk ash–soil mixtures

Kumar

Gupta

2016

Geotextiles and Geomembranes

186

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Section: Fiber-reinforced Soilmentioning

confidence: 99%

Behavior of cement-stabilized fiber-reinforced pond ash, rice husk ash–soil mixtures

Kumar

Gupta

2016

Geotextiles and Geomembranes

186

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“…O uso da cinza de casca de arroz (CCA) em concreto foi patenteado no ano de 1924 e, após 1972, muitos pesquisadores concentraram-se na utilização da CCA derivada de queima não controlada (NAIR et al, 2006). A partir daí, diversas pesquisas têm sido realizadas com o uso da CCA em matrizes cimentícias, tanto para cinzas produzidas com queima controlada, quanto aquela à base de cinza de casca de arroz residual, obtida no processo de beneficiamento de arroz.…”

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Caracterização física e mecânica de argamassas à base de cimento Portland e cinza de casca de arroz residual

Rodrigues

Beraldo

2010

Eng. Agríc.

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RESUMO:A casca de arroz, utilizada como fonte de energia em indústrias de beneficiamento de arroz, converte-se, depois da queima, em uma cinza residual. Esse resíduo, ainda sem um destino adequado, é muitas vezes depositado em grandes áreas abertas e provoca elevado impacto ambiental. Este trabalho teve como objetivo avaliar a viabilidade de utilização da cinza de casca de arroz (CCA) residual na produção de argamassas, como substituta parcial do cimento. A caracterização da CCA foi realizada por meio da análise de fluorescência de raios-X (composição química), análise do teor de carbono e difração de raios-X; também foi realizada análise granulométrica a laser. Os corpos de prova foram submetidos a dois tipos de exposição: ambientes externo e interno, com duração máxima de cinco meses. Foram realizados os ensaios de resistência à compressão simples e não destrutivo (velocidade do pulso ultrassônico -VPU). Embora as argamassas tenham apresentado bom desempenho mecânico, os ensaios de pozolanicidade indicaram que a cinza de casca de arroz residual utilizada não é uma pozolana, mas pode ser utilizada em matrizes cimentícias como material inerte (filler). PALAVRAS-CHAVE:cimento Portland, cinza de casca de arroz (CCA), argamassa. PHYSICAL AND MECHANICAL CHARACTERIZATION ON PORTLAND CEMENT MORTAR WITH RICE HUSK ASH ADDITIONABSTRACT: Rice husk, employed as an energy source at milling industries in Brazil generates, after burning, a dark ash. This residue is not yet conveniently disposed, being currently dumped on large areas, causing environmental problems. This research intended to evaluate the applications of residual rice husk ashes (RHA) as a partial replacement of cement for mortar production. Rice husk ash was chemically characterized through X-ray fluorescence, determination of carbon content, Xray diffraction, and laser granulometric analysis. Mortar specimens were submitted to two different exposure conditions: internal and external environments at a maximum period of five months. Physical-mechanical testing were compressive strength and ultrasonic pulse velocity (UPV). Although presenting good mechanical performance, the mortar based on ash (RHA) did not present pozolanicity but it can be employed in cement matrices as inert material (filler).

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“…The amorphicity favors the pozzolanic activity of the RHA according to NAIR et al (2006). For the SDBA (Figure 3), it was observed that there is presence of crystalline phases, especially the quartz (SiO 2 ) and calcium carbonate (CaCO 3 ).…”

Section: Characterization Of Raw Materialsmentioning

confidence: 97%

Characterization and use of swine deep bedding ashes in cementitious composites

Oliveira¹,

Rodrigues²,

Santos³

et al. 2012

Eng. Agríc.

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ABSTRACT:The deep bedding is a swine alternative production, especially in the finishing phase, whose byproduct can be recycled, reducing the environmental impact. The objectives of this study were to characterize the ash coming from the controlled burning of the swine deep bedding (SDBA) based on rice husk, and to evaluate their performance in composites as a partial substitute for Portland cement (PC). To measure the differences between SDBA and rice husk ash (RHA) as a reference, we have characterized: particle size distribution, real specific density, x-ray diffraction, electrical conductivity, scanning electron microscopy, chemical analysis and loss on ignition. Samples were prepared for two experimental series: control, and another one with the partial replacement of 30% of SDBA in relation to the mass of the Portland cement. According to the results obtained for physical and mechanical characterization, the composites with SDBA can be used as a constructive element in the rural construction.

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Reactive pozzolanas from rice husk ash: An alternative to cement for rural housing

Cited by 126 publications

References 10 publications

Behavior of cement-stabilized fiber-reinforced pond ash, rice husk ash–soil mixtures

Behavior of cement-stabilized fiber-reinforced pond ash, rice husk ash–soil mixtures

Caracterização física e mecânica de argamassas à base de cimento Portland e cinza de casca de arroz residual

Characterization and use of swine deep bedding ashes in cementitious composites

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