Study of the Effects of the Addition of Fly Ash from Carwash Sludge in Lime and Cement Pastes

María C. Rodríguez-Fernández, Juan D. Alonso, Carolina Montero and Juan F. Saldarriaga
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María C. Rodríguez-Fernández: Department of Civil and Environmental Engineering, Universidad de los Andes, Carrera 1Este #19A-40, Bogota 111711, Colombia
Juan D. Alonso: Department of Civil and Environmental Engineering, Universidad de los Andes, Carrera 1Este #19A-40, Bogota 111711, Colombia
Carolina Montero: Chemical Engineering Faculty, Central University of Ecuador, Ritter s/n & Bolivia, Ciudad Universitaria, Quito 170521, Ecuador
Juan F. Saldarriaga: Department of Civil and Environmental Engineering, Universidad de los Andes, Carrera 1Este #19A-40, Bogota 111711, Colombia

Sustainability, 2020, vol. 12, issue 16, 1-13

Abstract: Sludge from carwash wastewater treatment plants has been evaluated as substitute for lime paste, as well as its behavior in cement mortars. Dry sludge waste was used with (CSlud) and without (USlud) pretreatment and have been characterized. The pastes were prepared with weight replacement of 5, 10, 15, and 20% of sludge. The formation of calcium silicate hydrate was determined by TGA, both in lime and cement pastes. The compressive strength properties were evaluated in mortars. It was found the mixtures which present the best results were those of 5 and 10% for USlud, and 10 and 20% for CSlud.

Keywords: carwash sludge; lime paste; cement; fly ash; reactivity; mortars (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2020
References: View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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