STUDY OF THE ADDITION OF A SECONDARY LEAD SMELTING SLAG TO CLAY BRICKS: INDUSTRIAL TEST

In order to enunciate new alternatives for the utilization of industrial waste, the present work exposes the results obtained from the use of a secondary lead smelting slag as an addition between 0 and 10% to clay bricks... [ view full abstract ]

In order to enunciate new alternatives for the utilization of industrial waste, the present work exposes the results obtained from the use of a secondary lead smelting slag as an addition between 0 and 10% to clay bricks during the years 2016 and 2017. The waste used was characterized by DRX, FRX and laser granulometry, as well as the pieces produced. Regular bricks and bricks added were manufactured at an industrial scale in a local bricks Factory. These bricks were evaluated through compressive strength and water absorption, as well as the environmental tests Toxicity Characteristic Leaching Procedure (TCLP) and Daphnia Pulex acute toxicity test; additionally the behavior under normal conditions of use is included. It also describes the changes and / or modifications made in the different stages of manufacturing of the pieces during the years 2016 and 2017. Results showed that SLSS increases the compressive strength and reduces the water absorption, improving the products quality. According to the tests of corrosivity (pH), toxicity (TCLP) and ecotoxicity (Daphnia pulex), neither the slag nor the produced bricks have any hazardous characteristic, since the results are below the established maximum limits by the environmental standards.

Based on this, it can be concluded that the manufacture of ceramic pieces with addition of slag between these percentages does not affect the mechanical properties and quality of the products and this alternative represents a viable use for this type of industrial wastes.