Manufacturing self-compacting concrete with addition of waste fine marble

Abstract

ABSTRACT: The objective of this study  is to determine the cement replacement percentage for waste marble / granite (WMG) of marble shops in the manufacture of self-compacting concrete (SCC). The methodology adopted was conducting several laboratory tests: characterization; of rheological, mechanical, physical and chemical SCC. Two superplasticizers were used, sulfonated and polymeric. The aggregates were characterized by granulometry test, specific mass; unitary mass loose state; and unit mass in compressed state. The WMG were subjected to density test and X-rays fluorescence analysis. As rheological tests were performed: slumpflow, slumpflow T500, funnel V and L-box; and Testing of Compressive Strength and Flexion, Absorption, and Voids Index SCC Density in the hardened state, as well as tests on mortar bars to check Alkali Aggregate Reaction (AAR). The results were effective for most traits SCC, until 30% replacement of cement with WMG. In this fresh SCC met the requirements of NBR 15823 (ABNT, 2010), behaving like proper concrete for use in most current applications. In the hardened state showed compression strength of 35 MPa and bending strength of 7.0 MPa, satisfying the NBR 15805 (ABNT, 2010), may also be utilized in the production of concrete pavements, and thus contributing to the reduction of scattered residues, in Reduction of damages to the environment and bringing savings to obtain SCC.