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Reducing cement consumption in mortars by waste-derived hydrochars

2023-05-31Journal article Open access
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dc.contributor.authorSantos, Michael M.
dc.contributor.authorMarques Sierra, Antonio Luis
dc.contributor.authorAmado Fierro, Álvaro
dc.contributor.authorSuárez, Marta
dc.contributor.authorBlanco, Francisco A.
dc.contributor.authorGonzález La Fuente, José Manuel
dc.contributor.authorDiez, Maria Antonia
dc.contributor.authorCenteno, Teresa A.
dc.date.accessioned2024-02-27T14:46:30Z
dc.date.available2024-02-27T14:46:30Z
dc.date.issued2023-05-31
dc.description.abstractWaste-derived hydrochars are presented for the first time as promising materials to reduce the consumption of natural resources and the carbon footprint of the cement industry, while eliminating waste and sequestering a high amount of carbon in civil infrastructures. Rice husk (RH) and stabilized organic waste from a mixed municipal waste mechanical-biological treatment plant (SOW) were subjected to hydrothermal carbonization at 200 °C for 2 h and the resulting hydrochars were thoroughly evaluated as cement substitutes in fresh and hardened mortars. Compared to the control, mortars with 1.25–5 wt% of cement replaced by hydrochar from stabilized organic fraction caused a decrease in compressive strength of about 50–60% at 28 days of curing, while flexural strength was diminished by about 38–47%. The use of rice husk-derived hydrochar led to a reduction of 32–47% in compressive strength and of 22–34% in flexural strength. With compressive and flexural strengths of 27–41 and 3.31–4.92 MPa, respectively, blended mortars (28 days) display good prospects for use in plastering, rendering, masonry, partition panels and low-load paving. On the other hand, substituting 5 wt% of cement by hydrochar decreases the thermal conductivity and increases electrical resistivity of the mortar by 25–30%, which enhances thermal insulation properties and potential durability. This approach opens a new avenue for large-scale application of biowaste hydrochars as secondary raw materials for sustainable construction.pt_PT
dc.description.sponsorshipFunding from the European Regional Development Fund (ERDF) through project CEMOWAS 2 (SOE2/P5/F0505)-INTERREG V SUDOE 2017 and from the Plan de Ciencia, Tecnología e Innovación (PCTI) 2018-2022 del Principado de Asturias and the ERDF (project IDI/2021/000037) is gratefully acknowledged. CINN acknowledges the financial support received from FICYT (IDI/2021/000106). Michael M. Santos thanks the University of Beira Interior and the Spanish National Research Council (CSIC) for the Erasmus+ internship award. This study was carried out with the support of COGERSA for obtaining and managing the SOW sample and of the company DACSA for supplying the rice husk. The assistance of the INCAR-CSIC library service led by Luis Gutiérrez FernándezTresguerres is highly appreciated.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.doi10.1016/j.jobe.2023.106987pt_PT
dc.identifier.urihttp://hdl.handle.net/10400.6/14269
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherElsevierpt_PT
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/pt_PT
dc.subjectHydrothermal carbonizationpt_PT
dc.subjectBlended mortarpt_PT
dc.subjectMixed-municipal wastept_PT
dc.subjectRice huskpt_PT
dc.subjectWaste recoverypt_PT
dc.titleReducing cement consumption in mortars by waste-derived hydrocharspt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.citation.startPage106987pt_PT
oaire.citation.titleJournal of Building Engineeringpt_PT
oaire.citation.volume75pt_PT
person.familyNameMendes dos Santos
person.familyNameMarques Sierra
person.familyNameAmado Fierro
person.familyNameSuárez
person.familyNameGonzález La Fuente
person.familyNameDiez
person.familyNameCenteno
person.givenNameMichael
person.givenNameAntonio Luis
person.givenNameÁlvaro
person.givenNameMarta
person.givenNameJosé Manuel
person.givenNameMaria Antonia
person.givenNameTeresa A.
person.identifierhttps://scholar.google.co.id/citations?hl=pt-PT&pli=1&user=Y4u068QAAAAJ
person.identifier549840
person.identifier1063897
person.identifier781497
person.identifier.ciencia-id771A-5350-B7E1
person.identifier.orcid0000-0002-6140-3052
person.identifier.orcid0000-0003-4665-4491
person.identifier.orcid0000-0002-2851-2169
person.identifier.orcid0000-0001-9764-0861
person.identifier.orcid0000-0002-6305-5047
person.identifier.orcid0000-0003-4630-0669
person.identifier.orcid0000-0001-8405-7298
person.identifier.ridL-7743-2014
person.identifier.ridL-9117-2018
person.identifier.scopus-author-id57222981287
person.identifier.scopus-author-id58298095400
person.identifier.scopus-author-id56861392300
person.identifier.scopus-author-id57682996500
person.identifier.scopus-author-id7102085475
person.identifier.scopus-author-id6603741271
rcaap.rightsopenAccesspt_PT
rcaap.typearticlept_PT
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