2018
DOI: 10.1590/s1983-41952018000600004
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Assessment of the pozzolanic activity of ornamental stone waste after heat treatment and its effect on the mechanical properties of concretes

Abstract: This paper aims at evaluating the pozzolanic properties of ornamental stone processing waste after heat treatment at 1200 °C (HTOSPW) and analyzing the influence on the mechanical strength of concrete produced with HTOSPW addition at the contents of 5% and 10% by mass of Portland cement. The HTOSPW shows promising results regarding the pozzolanic activity, revealing chemical and physical characteristics typical of pozzolanic materials in addition to being approved in the pozzolanicity tests performed. As for t… Show more

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Cited by 10 publications
(6 citation statements)
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“…After applying the values obtained for strength to 28 days for the compression test in the CCW compositions of 0, 10 and 20%, 28.98, 27.06 and 25.86 MPa were obtained, respectively. According to Brazilian standards, concrete is considered structural when it has more than 20 MPa of fck , which leads to the conclusion that all compositions can be used as structural concrete [ 55 ]. Additionally, in more aggressive environments, such as urban pollution, typical of big cities, the concrete must present at least 25 MPa of fck [ 56 ], which in the present case was also verified for all studied compositions.…”
Section: Resultsmentioning
confidence: 99%
“…After applying the values obtained for strength to 28 days for the compression test in the CCW compositions of 0, 10 and 20%, 28.98, 27.06 and 25.86 MPa were obtained, respectively. According to Brazilian standards, concrete is considered structural when it has more than 20 MPa of fck , which leads to the conclusion that all compositions can be used as structural concrete [ 55 ]. Additionally, in more aggressive environments, such as urban pollution, typical of big cities, the concrete must present at least 25 MPa of fck [ 56 ], which in the present case was also verified for all studied compositions.…”
Section: Resultsmentioning
confidence: 99%
“…Los resultados muestran que ambas pizarras cumplen con los requerimientos químicos (SiO 2 , Al 2 O 3 , Fe 2 O 3 > 70 %) y el % SO 3 inferior al 4 %, de acuerdo con la norma ASTM C 618 [40] para las puzolanas clase N puzolanas naturales calcinadas y sin calcinar. Independientemente de que se ha reportado que los álcalis presentes en algunas pizarras evaluadas como puzolana, no presentan un efecto directo sobre la actividad puzolánica [7,41], es necesario tener en cuenta el relativamente elevado contenido de álcalis en los residuos de pizarras aquí analizados, en particular, si se pretende emplear en hormigones que contienen áridos reactivos o el cemento con el que va a ser mezclado encuentra limitaciones en el contenido de álcalis.…”
Section: Resultados De La Caracterización Química Y Mineralógica De Los Residuos De Pizarras Calcinadosunclassified
“…Assim, a necessidade do desenvolvimento sustentável, que se apresentara incompatível com os sistemas de produção e consumo, de acordo com o relatório de Brundtland e o Transformando Nosso Mundo: a Agenda 2030 para o desenvolvimento sustentável (UNITED NATIONS, 2015), apresentada na Figura 1. Nessa perspectiva, estudos já foram realizados a respeito da reutilização do resíduo pó de rocha ornamental (RPRO) na produção de materiais para a construção civil (VINCO et al 2016;MITTRI et al 2018;CHAVES 2019;MENDONÇA et al 2021).…”
Section: Introductionunclassified