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Abstract: The high consumption of natural resources in the industrial sector makes it necessary to implement measures that enable the reuse of the waste generated, seeking to achieve circular economy. This work assesses the viability of an alternative to the use of CEM III B 32.5 R cement in mortars for the internal coating of centrifugally spun cast iron pipes for water piping. The proposal is to reuse the slag generated in the casting process after being finely ground, as an addition mixed with CEM I 52.5 R cement, which is basically Portland clinker. In order to analyse this possibility, an extensive experimental campaign was carried out, including the analysis of the cupola slag (micro-structural and chemical composition, leachates, setting time, vitrification, puzzolanicity and resistance to sulphate) and regarding the mortars (workability and mechanical properties). The experimental programme has shown that the optimum substitution is achieved with a replacement percentage of 20% of the cement, with which similar workability, superior mechanical properties and guaranteed resistance to sulphate attack are obtained. In addition, both economic and environmental savings are achieved by not having to transport or landfill the waste. In addition, the new cement is cheaper than the cement currently used.
Fuente: Applied Sciences 2021, 11(15), 7029
Fecha de publicación: 01/08/2021
Nº de páginas: 19
Tipo de publicación: Artículo de Revista
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CARLOS THOMAS GARCIA
JOSE ADOLFO SAINZ-AJA GUERRA
ISRAEL ENRIQUE SOSA YEPEZ
JESUS SETIEN MARQUINEZ
JUAN ANTONIO POLANCO MADRAZO
ANA ISABEL CIMENTADA HERNANDEZ