Laboratory-scale study and semi-industrial validation of viability of inorganic CDW fine fractions as SCMs in blended cements
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Author/sMoreno-Juez, J.; Vegas, Iñigo J.; Frías Rojas, M.; Vigil de la Villa, R.; Guede-Vázquez, E.
CDW recycling, use of CDW as SCM
Concrete and glass waste
Greenhouse gas abatement
The construction industry and more particularly cement manufacture industry are European Green Deal strategic priorities for the circularity of Europe’s construction and demolition waste (CDW) stream with a view to reducing CO2 emissions. The industry is engaged in a number of strategies to that end, one of which is to manufacture new low-carbon, lower clinker/cement ratio cements by replacing portland clinker with inorganic fractions of CDW featuring hydraulic or pozzolanic properties. Against the backdrop of that global challenge, the present study explores the cementitious potential of the limestone and siliceous concrete fines and shatterproof building glass found in CDW as supplementary cementitious materials (SCMs) in new blended cements. The research was conducted in two stages: generation of new laboratory-scale knowledge; and industrial validation of the viability of using the highest volume waste streams. The laboratory-scale findings revealed that the presence of the filler ...