Influence of coal mining by-products on the new blended cement properties

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dc.contributor.authorFrías, Moisés
dc.contributor.authorRodríguez, Olga
dc.contributor.authorGarcía, Rosario
dc.contributor.authorVigil, Raquel
dc.contributor.authorVegas, Iñigo
dc.contributor.authorMartínez-Ramírez, Sagrario
dc.contributor.authorFérnandez-Carrasco, Lucía
dc.contributor.authorSánchez De Rojas, Ma Isabel
dc.contributor.institutionGENERAL
dc.date.accessioned2024-07-24T12:05:36Z
dc.date.available2024-07-24T12:05:36Z
dc.date.issued2015
dc.descriptionPublisher Copyright: © Copyright (2015) by American Concrete Institute. All rights reserved.
dc.description.abstractThe authors of this paper report the possibility of obtaining a metakaolin based pozzolanic material from coal mining. This is a priority line of European environmental policies on the by-products recycling as a raw material due to its environmental benefits. In 2009, global coal production was 6.9 million tonnes [7.6 million tons], which produced the coal mining by-products of about 10-15% of coal production. Most of these by-products accumulate in landfills for many decades, with the resulting economic, social, and environmental challenges. These starting by-products, due to their characteristics, are inert materials without pozzolanic properties. However, once activated under controlled thermal conditions, they have good qualities as active addition, which may be based on metakaolin. This research work presents, the scientific and technical viability of obtain new eco-efficient blended cements based on the thermally activated coal mining by-products (ACMW). Different instrumental techniques were used to evaluate different scientific aspects (composition, mineralogy, and pozzolanic properties), as well as on the rheological and mechanical behaviour of blended cements up to 20% of replacement of ACMW. The results show that theses by-products once calcined at 600°C, shows high pozzolanic activity in Ca(OH)2/ACMW systems, forming metastable hydrated phases similar to those obtained by natural metakaolin. However, an important difference was found in the LDH structures, as a consequence of the presence of calcite in the raw by-products. Also, the results obtained had good behavior as blended cements with ACMW up to 20% of replacement of OPC following the chemical, physical, and mechanical requirements of European standard.en
dc.description.statusPeer reviewed
dc.format.extent13
dc.identifier.citationFrías , M , Rodríguez , O , García , R , Vigil , R , Vegas , I , Martínez-Ramírez , S , Férnandez-Carrasco , L & Sánchez De Rojas , M I 2015 , ' Influence of coal mining by-products on the new blended cement properties ' , American Concrete Institute, ACI Special Publication , vol. 2015-January , no. SP 303 , pp. 133-145 .
dc.identifier.issn0193-2527
dc.identifier.urihttps://hdl.handle.net/11556/3575
dc.identifier.urlhttp://www.scopus.com/inward/record.url?scp=84963997583&partnerID=8YFLogxK
dc.language.isoeng
dc.relation.ispartofAmerican Concrete Institute, ACI Special Publication
dc.rightsinfo:eu-repo/semantics/restrictedAccess
dc.subject.keywordsBlended cements
dc.subject.keywordsCoal mining by-product
dc.subject.keywordsProperties
dc.subject.keywordsRecycled MK
dc.subject.keywordsCivil and Structural Engineering
dc.subject.keywordsBuilding and Construction
dc.subject.keywordsGeneral Materials Science
dc.titleInfluence of coal mining by-products on the new blended cement propertiesen
dc.typeconference output
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