Feasibility of Using Calcined Water Treatment Sludge in Rendering Mortars: A Technical and Sustainable Approach

Jairo José de Oliveira Andrade, Edna Possan, Matheus Chiaradia Wenzel and Sérgio Roberto da Silva
Additional contact information
Jairo José de Oliveira Andrade: Graduation Program in Materials Engineering and Technology, Pontifical Catholic University of Rio Grande do Sul (PGETEMA/PUCRS), Porto Alegre 90610-900, Brazil
Edna Possan: Engineering Department, Federal University of Latin American Integration (UNILA), Foz do Iguaçu 85866-000, Brazil
Matheus Chiaradia Wenzel: Pontifical Catholic University of Rio Grande do Sul (PUCRS), Porto Alegre 90610-900, Brazil
Sérgio Roberto da Silva: Civil Engineer, Graduation Program in Materials Engineering and Technology, Pontifical Catholic University of Rio Grande do Sul (PGETEMA/PUCRS), Porto Alegre 90610-900, Brazil

Sustainability, 2019, vol. 11, issue 13, 1-19

Abstract: Many current industrial processes, such as water treatment, produce large amounts of waste. The water treatment sludge (WTS) must be properly disposed of and/or used as raw material for application in other sectors, such as the construction industry. The rendering mortar production can be an environmentally friendly alternative to recycle the WTS, this being the object of this research. In this way, mortars were produced with 2.5%, 5%, 7.5%, and 10% calcined WTS to replace natural sand. The water absorption, compressive strength, bond strength, and flexural strength properties were evaluated. A natural carbonation was carried out for the determination of CO 2 uptake due to carbonation. The results showed that the incorporation of calcined WTS has an influence on all the properties evaluated. Considering 50 years of service life, the CO 2 uptake potential for mortar with 10% calcined sludge WTP is 111 kg CO 2 /t. In the sustainability approach, it was observed that CO 2 uptake due to carbonation is higher in mortars with the addition of WTS, and could be an environmentally friendly alternative that compensates emissions from the cementitious materials production.

Keywords: Sustainability; water treatment sludge; mortars; physical–mechanical properties; CO 2 uptake (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2019
References: View references in EconPapers View complete reference list from CitEc
Citations:

Downloads: (external link)
https://www.mdpi.com/2071-1050/11/13/3576/pdf (application/pdf)
https://www.mdpi.com/2071-1050/11/13/3576/ (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:gam:jsusta:v:11:y:2019:i:13:p:3576-:d:243937

Access Statistics for this article

Sustainability is currently edited by Ms. Alexandra Wu

More articles in Sustainability from MDPI
Bibliographic data for series maintained by MDPI Indexing Manager ().