Desenvolvimento de geopolímero a partir de cinza de olaria e metacaulim ativado com adição de cinza de ossos bovinos

Abstract

The constant concern with the environment has become increasingly present in everyday life. Seen it, the search for alternative materials and low cost production enabled the emergence of a new class of materials, the geopolymers. These materials are as a high-performance concrete alternative obtained from raw materials of very low cost. In this context, this paper reports an exploratory study in geopoliméricas folders based on metakaolin activated with sodium hydroxide. The gray pottery and bovine bone ash were used as sources of silica and calcium, respectively. There were four different formulations proposed, which gradually gray cattle bones was incorporated. The bodies were molded and cured at 65 ° C, and then subjected to compression tests at the ages of 15 and 28 days. The starting materials were characterized by X-ray fluorescence (XRF), X-ray diffraction (XRD) and thermogravimetric-differential thermal analysis (TDA / TG). The samples studied have undergone X-ray diffraction, apparent density and compressive strength tests, the latter to evaluate the degree of performance. The results obtained showed a bulk density values in disagreement with the literature. After 15 days cure the geopolymers reached Compressive strength 4.24 MPa and up to 28 days old results of approximately 5.5 MPa. The XRD patterns of X-ray geopoliméricas samples studied show a great predominance of zeolite formation.