RESIDUOS DE LODOSCOMPACTADOSSIN CALCINAR PROVENIENTESDEL LAVADO DE GRAVA Y ARENA DE UNA PLANTA DE ÁRIDOS COMO ESTRATEGIA DE VALORIZACIÓN DE RESIDUOS

Francisco Dario Cabrera Poloche; Oscar Jaime Restrepo Baena; Jorge Iván Tobón; Sergio Escudero Restrepo; Stephanie Álvarez Zuluaga

doi:10.17533/RCM/udea.rcm.n19a05

Authors

Francisco Dario Cabrera Poloche National university of Colombia
Oscar Jaime Restrepo Baena Cement and Building Materials Research Group (CEMATCO), Department of Materials and Minerals, Universidad Nacional de Colombia https://orcid.org/0000-0003-3944-9369
Jorge Iván Tobón Cement and Building Materials Research Group (CEMATCO), Department of Materials and Minerals, Universidad Nacional de Colombia https://orcid.org/0000-0002-1451-1309
Sergio Escudero Restrepo Industrial Conconcreto Company
Stephanie Álvarez Zuluaga Industrial Conconcreto Company

DOI:

https://doi.org/10.17533/RCM/udea.rcm.n19a05

Keywords:

sand wash mud, wastes reuse, compacted adobes, earth constructions

Abstract

Fine waste management from quarry has been commonly the final disposal in mining tailings and as refilling material for landscape recovery in areas already exploited. However, different uses of these wastes have been studied, highlighting the earth constructions because a new economic benefit is generated and the environmental impact is reduced. Moreover, compared to cement constructions, the earth constructions are environmentally friendly and represent an energy saving, due to their low emission of CO₂ by low or no-cement content in their manufacture in contrast to good physical and mechanical properties obtained. So, in this work, the use of wastes muds from an aggregates plant (as result of crushing and washing process) were evaluated as a circular economy strategy. Raw materials were chemical, mineralogical and physically characterized and were employed in the elaboration of cubic specimens of un-calcined material, which they were hydraulically compacted in metal molds at mixtures of wastes muds, commercial gray cement and washed fine sand. The cubic specimen’s performance was evaluated by Simple Compressive Strength (SCS) and water absorption test. In the best of configurations, an increase in SCS of 221.3% (reaching 8 MPa) on samples of 20% cement with respect to samples of only waste was found and, in turn, an increase of 517.3% (reaching 15 MPa) when these were cured in water was also found. Thus, wastes mixed with small amounts of cement are promising in the Manufacture of Compacted Adobes (MCA), particularly as masonry or structural elements made of un-calcined wastes.

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