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dc.contributor.authorArribas, I.
dc.contributor.authorVegas, I.
dc.contributor.authorGarcía, V.
dc.contributor.authorVigil de la Villa, R.
dc.contributor.authorMartínez-Ramírez, S.
dc.contributor.authorFrías, M.
dc.date.accessioned2018-04-11T14:47:52Z
dc.date.available2018-04-11T14:47:52Z
dc.date.issued2018-05-10
dc.identifier.citationArribas, I., I. Vegas, V. García, R. Vigil de la Villa, S. Martínez-Ramírez, and M. Frías. “The Deterioration and Environmental Impact of Binary Cements Containing Thermally Activated Coal Mining Waste Due to Calcium Leaching.” Journal of Cleaner Production 183 (May 2018): 887–897. doi:10.1016/j.jclepro.2018.02.127.en
dc.identifier.issn0959-6526en
dc.identifier.urihttp://hdl.handle.net/11556/530
dc.description.abstractCalcium-leaching processes can potentially degrade the structure of a concrete matrix. This problem is studied here through the progressive dissolution of Ca2+ in both ordinary Portland cement pastes (C-0) and binary cement blends (C-20) containing 20% thermally Activated Coal Mining Waste (ACMW).1 A series of accelerated tests are conducted that involve the immersion of these cement pastes in a 6 M ammonium nitrate solution at a temperature of 20  C for 7 and for 21 days. A rise in paste porosity was observed, due to increased capillary pore sizes of between 5 and 0.1 μm. In the case of the 20% ACMW pastes (C-20), calcium leaching decreased, probably as a consequence of the pozzolanic effect of the ACMW, while potassium and magnesium leaching increased, due to the presence of the phyllosilicates in the ACMW. The paste compounds most affected by leaching were Ca(OH)2, C6AS3H32, and C4AC¯H12. In general terms, it can be concluded that the incorporation of ACMW into binary cements slightly reduces the calcium leaching phenomena. Concerning the environmental impact assessment, the substitution of 20% OPC by ACMW reduced CO2 emissions by as much as 12% and improved energy efficiency by using approximately 19% fewer fossil resources.en
dc.description.sponsorshipThis research was developed in the framework of the MATCON Associated Unit (CSICTecnalia, Madrid, Spain) with the support of the Spanish Ministry of Economy and Competitiveness (Project Ref. MAT2012-37005-CO3-01/02/03) and the European Regional Development Fund (MINECO/FEDER) (Project Ref.BIA2015-65558-C3- 1,2,3-R. The authors are also grateful to the Sociedad Anónima Hullera Vasco-Leonesa and to the Spanish Cement Institute (IECA) for providing us with raw materials.en
dc.language.isoengen
dc.publisherElsevier Ltden
dc.rightsAttribution-NonCommercial-NoDerivatives 4.0 International*
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/*
dc.titleThe deterioration and environmental impact of binary cements containing thermally activated coal mining waste due to calcium leachingen
dc.typearticleen
dc.identifier.doi10.1016/j.jclepro.2018.02.127en
dc.rights.accessRightsembargoedAccessen
dc.subject.keywordsACMWen
dc.subject.keywordsCalcium leachingen
dc.subject.keywordsThermally activated coal mining wasteen
dc.subject.keywordsBinary cementsen
dc.subject.keywordsDegradationen
dc.journal.titleJournal of Cleaner Productionen
dc.page.final897en
dc.page.initial887en
dc.volume.number183en


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