Glass residue from a metallurgical industry to re-utilization in soil-cement plaque

The steel industry is responsible for generating a large volume of solid waste. One of the main products of the milling is the generation of the waste called Fluffy. Glass residue from metallurgical Fluffy was studied for soil-cement plaque production. The soil and the grounded glass residue were previously characterized and mixed with cement CPV-ARI, according to the following proportions, respectively: 40:20:40; 50:20:30; 60:20:20; 50:10:40; 60:10:30 and 70:10:20. They were compressed (120x30x5 mm) and cured (by addition of water) for seven days. The samples (after 28 days) were analyzed to evaluate the crystalline phases (by XRD), morphological analysis (by optical microscope), specific mass (pycnometer) and water absorption in triplicates. The residue and the soil presented specific mass of 2.389 and 2.021g/cm³ , respectively, while the samples presented mean values of specific mass between 1.344 and 1.773 g/cm³ . The samples water absorption was from 16.14 to 21.81%, mean values of 16.34-19.54%. The mean flexural strength varied between 2.22 MPa and 4.66 MPa. Thereby, the use of the glass residue in the production of soil-cement plaques has potential as sustainably product. (author)