Study of the physical and mechanical properties of permeable concrete with the addition of TiO 2 for the treatment of sewage

Araújo, Wendel Melo Prudêncio de; Avelino, Flávio Pessoa; Picanço, Marcelo de Souza; Macêdo, Alcebíades Negrão

doi:10.1590/s1983-41952020000500014

Cited by 2 publications

(1 citation statement)

References 23 publications

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“…The presence of 99.95% of Titanium was verified by the XRF of titanium dioxide, a result that corroborates with the XRD (Figure 2) of the sample that presents the characteristic phases of Titanium. Adapted From (Araújo, 2020) According to the micrographs obtained by scanning electron microscopy (SEM), at point A, the samples of TiO2 (Figure 3a) present particles with uniform distribution, spherical morphology, and slight agglomeration. There were no significant variations in grain morphology.…”

Section: Tio2 Characterizationmentioning

confidence: 99%

Pervious concrete (PC) with adition of TiO2 used in sanitary sewage treatment

Araújo

Sandoval²,

Picanço³

et al. 2022

ric

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Pervious concrete (PC) is considered a solution to reduce the effects of heat islands, runoff problems, as well as reduce the concentrations of pollutants present in the water; however, its potential as a filter bed is used in the treatment of sanitary sewage has never been evaluated. This work aimed to evaluate the influence of photocatalytic TiO2 addition in PC on the concentration of total phosphorus, total ammonia, nitrate, total solids, and turbidity for application in the treatment of sanitary sewage. Sunlight was used as a radiation source. A flat photocatalytic reactor was built, in which 100 liters of raw sewage were pumped, with a flow of 100 L/min over the PC slabs, covering a total area of 1 m². The TiO2 concentrations added to the PC were 3, 6, and 10%. The results indicate efficiency in the adsorption of total phosphorus, total ammonia, nitrate, total solids, and turbidity. Thus, the use of PC associated with 10% TiO2 can add efficiency to the sanitary sewage treatment process by maintaining good mechanical and hydraulic behavior.

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Section: Tio2 Characterizationmentioning

confidence: 99%

Pervious concrete (PC) with adition of TiO2 used in sanitary sewage treatment

Araújo

Sandoval²,

Picanço³

et al. 2022

ric

View full text Add to dashboard Cite

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Metodologías empleadas para la producción de concreto permeable usando parcialmente materiales reciclados como agregados: una revisión literaria

Ayala-López

Gil-Ahumada

Cornejo-Ramos

et al. 2022

TecnoL.

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El objetivo de la presente revisión fue recopilar y discutir literatura científica sobre metodologías empleadas para la producción y elaboración del concreto innovador “concreto permeable”, como alternativa de diseño en pavimentos, con el remplazo parcial de agregado grueso por agregados reciclados, como látex de caucho al 5 % y 8 % por peso de cemento, ceniza volante entre el 0 % y el 70 % por volumen del cemento, y fibra de carbono al 0.27 % y 0.4 % por peso de agregado grueso. Esta revisión de literatura implicó seleccionar las publicaciones más relevantes, para los períodos del 2015 al 2021 en bases de datos indexadas Scopus, Scielo, ScienceDirect, y Latindex; enfocándose en múltiples parámetros como: “materiales residuales, coeficiente de permeabilidad, concreto permeable, grado de porosidad y ensayos de laboratorio para el concreto permeable”. Los resultados muestran que la resistencia a la compresión varía entre 0.5 MPa y 97.3 MPa, resistencia a la tracción entre 1.6 MPa y 5.29 MPa y la permeabilidad entre 4.63 mm/s y 10.2 mm/s, donde el porcentaje idóneo del uso de ceniza volante para la obtención óptima de concreto permeable es hasta el 20 %, que, excediendo este porcentaje, afecta negativamente sus propiedades mecánicas. En conclusión, el “concreto permeable” se sitúa dentro de los rangos establecidos según normativa: 17.5 MPa, 2.6 MPa, 6.1 mm/s, respectivamente; por ende, adquiere un valor sustancial, contribuyendo con la mejora del nivel microestructural y mayor durabilidad, siendo ventajoso y útil en los tiempos modernos.

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Study of the physical and mechanical properties of permeable concrete with the addition of TiO 2 for the treatment of sewage

Cited by 2 publications

References 23 publications

Pervious concrete (PC) with adition of TiO2 used in sanitary sewage treatment

Pervious concrete (PC) with adition of TiO2 used in sanitary sewage treatment

Metodologías empleadas para la producción de concreto permeable usando parcialmente materiales reciclados como agregados: una revisión literaria

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