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Behaviour of metakaolin-based geopolymers incorporating sewage sludge ash (SSA)
dc.contributor.author | Reig, Lucía | |
dc.contributor.author | Borrachero, Mª Victoria | |
dc.contributor.author | Istuque, D.B. | |
dc.contributor.author | Moraes, J.C.B. | |
dc.contributor.author | Akasaki, Jorge Luís | |
dc.contributor.author | Soriano, Lourdes | |
dc.contributor.author | PAYÁ, JORDI | |
dc.contributor.author | Malmonge, J.A. | |
dc.contributor.author | Tashima, M. M. | |
dc.date.accessioned | 2016-07-04T09:44:28Z | |
dc.date.available | 2016-07-04T09:44:28Z | |
dc.date.issued | 2016 | |
dc.identifier.citation | ISTUQUE, D. B., et al. Behaviour of metakaolin-based geopolymers incorporating sewage sludge ash (SSA). Materials Letters, 2016, vol. 180, p. 192-195 | ca_CA |
dc.identifier.uri | http://hdl.handle.net/10234/161416 | |
dc.description.abstract | In recent years, geopolymers have become a widely researched binding material. There are technological and environmental advantages to using this type of binder instead of Portland cement. In this study, binary systems of geopolymers were produced by using mixtures of metakaolin (MK), a well-known aluminosilicate raw material, and a residue from sewage sludge incineration: sewage sludge ash (SSA). This ash was used to partially replace the metakaolin in proportions of 0–20%. The mixtures were activated with alkaline solutions and they were cured by using two different conditions: at room temperature (25 °C) and in a thermal bath (65 °C). The samples were assessed by X-ray diffraction, scanning electron microscopy (pastes) and compressive strength (mortars). The results from these studies showed zeolite formation (faujasite) in geopolymers cured in the thermal bath, which caused a decrease in the compressive strength of the alkali-activated mortars. Replacement of MK with SSA caused a lower reduction in the compressive strength of mortars cured at 65 °C. However, at room temperature, similar mechanical strength was observed for the MK and MK-SSA systems. These results demonstrated that SSA is a suitable mineral precursor for partial replacement of MK in geopolymer production. | ca_CA |
dc.description.sponsorShip | The authors acknowledge Santander Universidades for the grant to Lucia Reig (program: Becas Iberoamérica Jóvenes Profesores Investigadores España 2014), CAPES (CAPES/DGU n°266/12), CNPq (no. 14/2013 processo 478057/2013-0) Scanning electron microscopy service of FEIS/UNESP and CNPq (processo 309015/2015-4). | ca_CA |
dc.format.extent | 11 p. | ca_CA |
dc.format.mimetype | application/pdf | ca_CA |
dc.language.iso | eng | ca_CA |
dc.publisher | Elsevier | ca_CA |
dc.relation.isFormatOf | ISTUQUE, D. B., et al. Behaviour of metakaolin-based geopolymers incorporating sewage sludge ash (SSA). Materials Letters, 2016, vol. 180, p. 192-195. | ca_CA |
dc.rights | © 2016 Elsevier | ca_CA |
dc.rights.uri | http://rightsstatements.org/vocab/InC/1.0/ | * |
dc.subject | alkali-activated binder | ca_CA |
dc.subject | microstructure | ca_CA |
dc.subject | residue | ca_CA |
dc.subject | x-ray techniques | ca_CA |
dc.title | Behaviour of metakaolin-based geopolymers incorporating sewage sludge ash (SSA) | ca_CA |
dc.type | info:eu-repo/semantics/article | ca_CA |
dc.rights.accessRights | info:eu-repo/semantics/openAccess | ca_CA |
dc.relation.publisherVersion | http://www.sciencedirect.com/science/article/pii/S0167577X16309028 | ca_CA |
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