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Rem: Revista Escola de Minas

Print version ISSN 0370-4467

Abstract

RESENDE, Domingos Sávio de; BEZERRA, Augusto Cesar da Silva  and  GOUVEIA, Antonio Maria Claret de. Mechanical properties of cement composites produced with sludge from the pre-fried potato industry's effluent treatment station. Rem: Rev. Esc. Minas [online]. 2012, vol.65, n.2, pp. 169-174. ISSN 0370-4467.  http://dx.doi.org/10.1590/S0370-44672012000200004.

The large volume of industrial solid waste generated by the pre-fried potato industry and the high cost of its management encouraged researchers to find solutions best suited to its final destination. This study characterized the solid residue (sludge) from the effluents pre-fried potatoes industry's treatment station. The sludge was processed by drying, grinding and sieving. Laser particle size, scanning electron microscopy (SEM) with X-ray spectrometer dispersive energy (EDS), X ray diffraction, differential thermal analysis (DTA), thermogravimetric (TGA) and loss on ignition were used to characterize the sludge. After characterization, cement was made using 3, 5, 7 and 10 percentages of the sludge to replace the cement. The composites were tested to obtain the compressive strength and dynamic elasticity modulus. Based on the result of the loss on ignition, the use of sludge as pozzolan was discarded. Based on the mechanical property tests carried out, it was noted that the addition of sludge as a partial replacement of cement is negatively impacted, with only the results of the cement composites of 3% and 5% being satisfactory.

Keywords : Sludge; pre-fried potato industry; cement composites.

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