Tribological and Mechanical Performance of Rock Powder Geopolymer Composite

Reference	Presenter	Authors (Institution)	Abstract
04-067	Cristyan Zenato Rissardi	Rissardi, C.Z.(Universidade de Caxias do Sul); Titton, A.P.(Universidade de Caxias do Sul); Cruz, R.C.(Universidade de Caxias do Sul);	Geopolymer technology has advanced exponentially in recent years. However, some basic properties for engineering applications were little or no explored, as is the case of the wear resistance of this material. It is known that the presence of crystalline phases on a micro- and nanometric scale in an amorphous matrix increases the wear resistance of different materials, such as glass-ceramic. The presence of crystalline particles in an amorphous matrix also changes the mechanical properties of these materials. Considering this, it was evaluated the influence of the addition of micrometric crystalline particles on a geopolymer matrix produced with metakaolinite. The crystalline particles used were powders obtained from the grinding of volcanic rocks of the Serra Geral Formation. These rocks were characterized by DRX and FRX techniques, processed in a ball mill, to have a maximum particle size of 45 ?m, and added to the geopolymer matrix in contents of 30% of the total mass of the mixture. The microstructure of the material were analyzed using optical and scanning electron microscopy (SEM), the wear was determined using a tribometer (UMT Tribolab, Bruker) and the mechanical properties were obtained by the Ball-on-Three-Balls test (B3B) and sound impulse. The results presented showed that the composite matrix, composed by a geopolymer matrix and rock powder, presented better wear and mechanical performance if compared to the geopolymer without addition of rock powder.
<< Back