Infl uence of the Marble and Granite Benefi cation of Residue (MGBR) as Filler on the Properties of Concrete

This paper describes how Brazil generates around 190,000 tons of mud from the residue of processing marble and granite (MGBR) annually. This has been the cause of a serious environmental problem because of a lack of destination for this residue. The objective of this paper is the evaluation of the technique viability of the use of the MGBR, generated for three marble shops, of Goiania city, state of Goias, in Brazil, as partial substitution for portland cement in the production of concretes. Characterizations have been made to determine the physical, chemical, mineralogical, and the pozzolanic reactivity of the residue. Reference concrete mixtures and concrete mixtures with 5%, 10% and 20% substitution of the MGBR of the cement were produced (w/cm) used were between 0.50 and 0.65. The properties of the concretes were determined, including workability, compressive strength, the modulus of elasticity, and absorption by immersion. The results show that the compressive strength of the concrete with the MGBR diminishes with contents of substitution at 10% and 20%. However, with 5% of substitution of the residue, the results of the analysis show that it did not have significant variations in any of the analyzed properties, indicating the viability technique of the substitution of this percentage of residue.