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Title

New waste-based clinkers for the preparation of low-energy cements. A step forward toward circular economy

AuthorsMartínez-Martínez, S.; Pérez-Villarejo, L.; Eliche-Quesada, D.; Sánchez-Soto, Pedro José ; Christogerou, A.; Kanellopoulou, D.G.; Angelopoulos, G.N.
KeywordsIndustrial wastes
Chamotte
Marble sludge
High belite clinker
Circular economy
Issue Date2019
PublisherAmerican Ceramic Society
CitationInt. J. Appl. Ceram. Soc, 17(1): 12-21 (2019)
AbstractThis paper describes the use of industrial wastes arising from different production processes of the ceramic and marble industries as raw materials for the design and formulation of new cement clinkers with a high content of dicalcium silicate (Belite). The aim was to reintroduce these wastes in the industrial sector and take advantage of them for a greater environmental benefit, as indicated by the principles of the circular economy. Formulations containing 2.5, 5 and 10 wt% of chamotte and marble sludge, respectively, and a waste-free formulation have been designed to obtain clinkers with a content of dicalcium silicate higher than 60 wt%. The different blends have been studied up to a maximum temperature of 1390°C by Thermal Analysis. Other techniques such as XRD, XRF, Modified Bogue Equation, Quality Indexes (LSF, AM, SM) and Optical Microscopy have been used for the study and characterization of industrial wastes, the raw materials and the high belite-type cement dosages. The results indicate that this type of cements can be designed using different types of wastes and in this way reduce the environmental impacts caused by the extraction of raw materials and the deposition of the wastes in landfills, improving the circular economy of the construction industry.
Publisher version (URL)http://dx.doi.org/10.1111/ijac.13390
URIhttp://hdl.handle.net/10261/215938
DOIhttp://dx.doi.org/10.1111/ijac.13390
Identifiersdoi: 10.1111/ijac.13390
issn: 1744-7402
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