2025 - Sustainable Industrial Processing Summit
SIPS2025 Volume 5. Meyers Intl. Symp. / Composite
| Editors: | F. Kongoli, P. Assis, H.A.C. Lopera, S. Diaz, S.N. Monteiro, V.S. Candido |
| Publisher: | Flogen Star OUTREACH |
| Publication Year: | 2025 |
| Pages: | 316 pages |
| ISBN: | 978-1-998384-46-4 (CD) |
| ISSN: | 2291-1227 (Metals and Materials Processing in a Clean Environment Series) |
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OPTIMIZING THE THERMAL TREATMENT OF MINING WASTE-AMENDED 4 CLAYS FOR CERAMIC AGGREGATES IN PAVEMENT APPLICATIONS
Murilo Miguel Narciso1; Lisley Madeira Coelho1; Sergio Monteiro1; Antônio Carlos Rodrigues Guimarães1;1MILITARY INSTITUTE OF ENGINEERING, Rio de Janeiro, Brazil;
Type of Paper: Regular
Id Paper: 71
Topic: 18
Abstract:
Mining activities generate large volumes of tailings with significant environmen- 13 tal impact, but also with potential for sustainable reuse in construction materials. This 14 study evaluates the production of ceramic aggregates from mixture of clay, sand and iron 15 ore waste subjected to thermal treatment at temperatures ranging from 600 to 1100°C. The 16 influence of calcination temperature on mineralogical transformations and mechanical 17 integrity was investigated using X-ray diffraction (XRD) and the α-Treton parameter, de- 18 rived from standardized impact resistance testing. The results indicate that the formation 19 of metakaolinite between 700 and 900°C enhances mechanical resistance, while higher 20 temperatures (>900°C) lead to structural degradation, followed by partial recovery due 21 to mullite crystallization. The α-Treton curve exhibited clear correlation with the phase 22 changes identified by XRD, demonstrating its applicability as a low-cost, sensitive proxy 23 for optimizing thermal activation. A simplified methodology is proposed to optimize the 24 thermal activation of such materials by correlating firing temperature with mineralogical 25 evolution and mechanical integrity, contributing to the development of sustainable ceramic 26 aggregates for pavement applications