Obtenção de espumas cerâmicas a partir de resíduo da terra diatomácea e ignimbrita pelo método de réplica

Abstract

Cellular ceramics are brittle materials of high porosity and surface area. The great interest in this class of materials is related to their specific properties and permeability to liquid and gaseous substances. In this study, ceramic foams were prepared by replication method in order to produce the ceramic support. The aim of this study was to develop a porous ceramic support from residue of diatomaceous earth and ignimbrite by replication method to mitigate the pollutants emitted by the burning of bricks and tiles from the clay industry. Thus, diatomaceous earth residue collected in a brewing industry, ignimbrite, a volcanic rock, and bentonite (as a binder) from Boa Vista city (PB) were used to obtain such ceramic support. Four formulations were prepared with two variables, size of grain and composition. Tests of water absorption, apparent density, porosity, and scanning electron microscopy were conducted to analyze the morphological structure of the ceramic support. Applying the ceramic support in a ceramic industry, the reduction of particulate materials was in agreement with the standards established by the Resolution No. 382/2006 of CONAMA.