Pó de Pedra Cariri na aplicação da tecnologia do bloco prensado sustentável

Abstract

The extraction industry in the Cariri region, particularly of Cariri stone (also known as Santana stone), generates a significant amount of waste during its production process, referred to as Cariri stone sawdust residue (CSSR). This waste poses environmental concerns due to the rudimentary methods employed in its extraction. This study aims to demonstrate the feasibility of incorporating CSSR into soil-cement bricks by partially replacing soil at proportions of 10%, 20%, 30%, 40%, and 50%, providing a sustainable and safe reuse alternative that benefits the local population. Compressive strength and water absorption tests were conducted in accordance with ABNT NBR 9491/2013 standards. The results indicated that all samples met the required standards, with the 10% and 40% replacement levels showing the best performance. Only one sample with 20% replacement did not reach the minimum required strength; however, all other results were within acceptable limits for both compressive strength and water absorption. These findings confirm that CSSR can be partially incorporated into soil-cement brick production, demonstrating its technical feasibility and sustainable application potential.