Physical and Chemical Properties of Waste Foundry Exhaust Sand for Use in Self-Compacting Concrete
Maria Auxiliadora de Barros Martins,
Lucas Ramon Roque da Silva,
Maria Gabriela A. Ranieri,
Regina Mambeli Barros,
Valquíria Claret dos Santos,
Paulo César Gonçalves,
Márcia Regina Baldissera Rodrigues,
Rosa Cristina Cecche Lintz,
Luísa Andréa Gachet,
Carlos Barreira Martinez,
Mirian de Lourdes Noronha Motta Melo
Affiliations
Maria Auxiliadora de Barros Martins
Physical and Chemical Institute, Federal University of Itajubá, BPS Avenue, 1303, Itajubá 37500-903, MG, Brazil
Lucas Ramon Roque da Silva
Mechanical Engineering Institute, Federal University of Itajubá, BPS Avenue, 1303, Itajubá 37500-903, MG, Brazil
Maria Gabriela A. Ranieri
Development, Technology and Society Program, Institute of Production Engineering and Management, Federal University of Itajubá, BPS Avenue, 1303, Itajubá 37500-903, MG, Brazil
Regina Mambeli Barros
Natural Resources Institute, Federal University of Itajubá, BPS Avenue, 1303, Itajubá 37500-903, MG, Brazil
Valquíria Claret dos Santos
Natural Resources Institute, Federal University of Itajubá, BPS Avenue, 1303, Itajubá 37500-903, MG, Brazil
Paulo César Gonçalves
Natural Resources Institute, Federal University of Itajubá, BPS Avenue, 1303, Itajubá 37500-903, MG, Brazil
Márcia Regina Baldissera Rodrigues
Natural Resources Institute, Federal University of Itajubá, BPS Avenue, 1303, Itajubá 37500-903, MG, Brazil
Rosa Cristina Cecche Lintz
School of Technology, University of Campinas, Paschoal Marmo, 1888, Campinas 18484-332, SP, Brazil
Luísa Andréa Gachet
School of Technology, University of Campinas, Paschoal Marmo, 1888, Campinas 18484-332, SP, Brazil
Carlos Barreira Martinez
Mechanical Engineering Institute, Federal University of Itajubá, BPS Avenue, 1303, Itajubá 37500-903, MG, Brazil
Mirian de Lourdes Noronha Motta Melo
Mechanical Engineering Institute, Federal University of Itajubá, BPS Avenue, 1303, Itajubá 37500-903, MG, Brazil
The reuse of waste in civil construction brings environmental and economic benefits. However, for these to be used in concrete, it is necessary a previous evaluation of their physical and chemical characteristics. Thus, this study aimed to characterize and analyze the waste foundry exhaust sand (WFES) for use in self-compacting concrete (SCC). Foundry exhaust sand originates from the manufacturing process of sand molds and during demolding of metal parts. It is a fine sand rich in silica in the form of quartz collected by baghouse filter. Characterization of WFES was conducted through laser granulometry, scanning electron microscopy (SEM) in the energy dispersive spectroscopy (EDS) mode, X-ray diffraction (XRD), X-ray fluorescence (XRF), Fourier transform infrared spectroscopy (FTIR), thermogravimetry (TG) and derivative thermogravimetry (DTG) techniques. The waste was classified as non-hazardous and non-inert, with physical and chemical properties suitable for use in SCC composition, as fine aggregate or mineral addition. Five mixtures of SCC were developed, in order to determine the waste influence in both fresh and hardened concrete. The properties in the fresh state were reached. There was an increase in compressive strength and sulfate resistance, a decrease in water absorption of self-compacting concrete by incorporating WFES as 30% replacement.
