{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,5,14]],"date-time":"2025-05-14T08:15:07Z","timestamp":1747210507038,"version":"3.40.5"},"reference-count":17,"publisher":"RGSA- Revista de Gestao Social e Ambiental","issue":"8","license":[{"start":{"date-parts":[[2024,4,18]],"date-time":"2024-04-18T00:00:00Z","timestamp":1713398400000},"content-version":"unspecified","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["RGSA"],"abstract":"<jats:p>Purpose: This study aims to investigate the valorisation of sludge from Leather Tannery Wastewater Treatment Plants (LTWWTP) by incorporating it into cement mortars.\n\u00a0\nTheoretical framework: The substantial quantity of waste generated by industries coupled with the scarcity of natural resources calls for the analysis, development, and implementation of treatment methods to recover and reuse materials, thereby minimising the environmental impact of waste disposal. The leather tanning industry, a significant polluter due to its use of hazardous and heavy materials, requires sustainable solutions for waste management. One promising approach is the incorporation of waste into cementitious matrices.\n\u00a0\nMethod: Three scenarios were examined: low-moisture sludge, ash obtained via incineration, and wet oxidation. Test specimens were prepared with varying proportions of cement replacement (0, 3, 5, 7, and 10%), and their flexural and compressive strengths were evaluated. Additionally, chemical analyses were conducted to assess solubility.\n\u00a0\nResults and Conclusion: The results indicate that sludge can be used in small proportions without compromising the mechanical strength of the mortar. Substituting 10% cement with ash using the INC-2 incineration method improved mortar quality, exhibiting a higher compressive strength of 41 MPa and minimal water absorption (3.28%).\n\u00a0\nResearch implications: Drawing from these promising findings, it can be confidently asserted that utilising WWTP sludge in mortar is a practical, eco-conscious solution for civil construction. Furthermore, it is a pivotal step towards addressing the challenge of hazardous sludge disposal.\n\u00a0\nOriginality\/value: The findings from this research will contribute to sustainable waste management practices and pave the way for responsible and eco-friendly utilisation of industrial waste in cementitious materials, thus minimising environmental burdens.<\/jats:p>","DOI":"10.24857\/rgsa.v18n8-043","type":"journal-article","created":{"date-parts":[[2024,4,18]],"date-time":"2024-04-18T15:52:39Z","timestamp":1713455559000},"page":"e04946","source":"Crossref","is-referenced-by-count":0,"title":["Leather Tanning Sludge in Cement Mortar: Sustainable Valorisation","Lodo do Curtimento de couro em Argamassa: Valoriza\u00e7\u00e3o Sustent\u00e1vel"],"prefix":"10.24857","volume":"18","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-4327-7782","authenticated-orcid":false,"given":"Ramiro Jos\u00e9 Espinheira","family":"Martins","sequence":"first","affiliation":[]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7676-4443","authenticated-orcid":false,"given":"Rafaela Mulinari","family":"Cabral","sequence":"additional","affiliation":[]},{"ORCID":"https:\/\/orcid.org\/0000-0002-5804-1644","authenticated-orcid":false,"given":"Juliana Martins Teixeira Abreu","family":"Pietrobelli","sequence":"additional","affiliation":[]}],"member":"10484","published-online":{"date-parts":[[2024,4,18]]},"reference":[{"key":"109975","unstructured":"ABNT - Associa\u00e7\u00e3o Brasileira de Normas T\u00e9cnicas (2016). NBR 5738: Procedimento para moldagem e cura de corpos de prova. Rio de Janeiro."},{"key":"109976","unstructured":"ABNT - Associa\u00e7\u00e3o Brasileira de Normas T\u00e9cnicas NBR 12653: Materiais pozol\u00e2nicos -Requisitos. Rio de Janeiro, 2016"},{"key":"109977","unstructured":"APHA (American Public Health Association), AWWA (American Water Works Association), WEF (Water Environmental Federation) (2022). Standard Methods for the Examination of Water and Wastewater. 24th ed. Washington."},{"key":"109978","unstructured":"Carneiro, C. M. M. (2020). Refina\u00e7\u00e3o do efluente da ETAR de uma f\u00e1brica de curtumes (Disserta\u00e7\u00e3o (Mestrado em Engenharia Qu\u00edmica). Instituto Superior de Engenharia do Porto, Porto."},{"key":"109979","unstructured":"European Standard (2017). EN 998-1:2016 - Specification for mortar for masonry; Part 1: Rendering and plastering mortar."},{"key":"109980","unstructured":"FETICOP Construction ends 2022 with favorable evolution, 2023. Available: www.fepicop.pt\/getfile.php?xp=2&src=file426_pt&ext=pdf. Accessed: Jan 2023."},{"key":"109981","unstructured":"Grabowski, T. T. (2020). Eco-Friendly cement mortar with WWTP sludge recovery (Master's Thesis). School of Technology and Management, Polytechnic Institute of Bragan\u00e7a, Bragan\u00e7a."},{"key":"109982","unstructured":"Laborat\u00f3rio Nacional de Engenharia Civil (1993). LNEC E 394 \u2013 Unidade de Bet\u00f5es e Cimentos, Absor\u00e7\u00e3o de \u00e1gua \u00e0 press\u00e3o atmosf\u00e9rica. MOPTC, Portugal."},{"key":"109983","unstructured":"Morais, L. C. P. (2005). Assessment of treatability of effluents from the tannery industry through chemical and biological oxidation (TeseDoutoramento em Engenharia Qu\u00edmica). Faculty of Engineering, University of Porto, Porto."},{"key":"109984","unstructured":"Normas T\u00e9cnicas SABESP. Norma T\u00e9cnica Interna SABESP NTS 013 - S\u00f3lidos. S\u00e3o Paulo, 1999."},{"key":"109985","doi-asserted-by":"publisher","DOI":"10.1590\/S0100-06832008000100039"},{"key":"109986","unstructured":"Sampaio, D. J. R. (2017). An\u00e1lise da viabilidade t\u00e9cnica da utiliza\u00e7\u00e3o de lema de ETA para substitui\u00e7\u00e3o parcial de cimento na produ\u00e7\u00e3o de bet\u00e3o (Disserta\u00e7\u00e3o de Mestrado em Engenharia do Ambiente). Faculdade de Engenharia, Universidade do Porto, Porto."},{"key":"109987","doi-asserted-by":"publisher","DOI":"10.24857\/rgsa.v17n10-049"},{"key":"109988","unstructured":"Sim\u00f5es, V. N., Braga, A. N. S., Brito, A. L. F. (2019) Assessment of integrity and durability of cement matrix containing tannery sludge. Electronic Journal of Materials and Processes, 14(1), 19-23."},{"key":"109989","doi-asserted-by":"publisher","DOI":"10.1016\/S0921-3449(02)00151-9"},{"key":"109990","doi-asserted-by":"publisher","DOI":"10.1016\/j.jhazmat.2007.04.100"},{"key":"109991","doi-asserted-by":"publisher","DOI":"10.13083\/1414-3984\/reveng.v23n4p326-335"}],"container-title":["Revista de Gest\u00e3o Social e Ambiental"],"original-title":[],"link":[{"URL":"https:\/\/rgsa.openaccesspublications.org\/rgsa\/article\/download\/4946\/2432","content-type":"application\/pdf","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/rgsa.openaccesspublications.org\/rgsa\/article\/download\/4946\/2432","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2024,4,26]],"date-time":"2024-04-26T22:36:07Z","timestamp":1714170967000},"score":1,"resource":{"primary":{"URL":"https:\/\/rgsa.openaccesspublications.org\/rgsa\/article\/view\/4946"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2024,4,18]]},"references-count":17,"journal-issue":{"issue":"8","published-online":{"date-parts":[[2024,4,15]]}},"URL":"https:\/\/doi.org\/10.24857\/rgsa.v18n8-043","relation":{},"ISSN":["1981-982X"],"issn-type":[{"type":"electronic","value":"1981-982X"}],"subject":[],"published":{"date-parts":[[2024,4,18]]}}}