| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Characterization of Minerals, Metals and Materials 2025: In-Situ Characterization Techniques
|
| Presentation Title |
Effects of Red Mud on the Mechanical and Piezoresistive Properties of Mortars |
| Author(s) |
Henrique Ribeiro Oliveira, Gustavo Henrique Nalon, Gustavo Emilio Soares de Lima, Leonardo Gonçalves Pedroti, José Carlos Lopes Ribeiro, José Maria Franco de Carvalho, Flávio Antônio Ferreira |
| On-Site Speaker (Planned) |
Gustavo Emilio Soares de Lima |
| Abstract Scope |
The growing demand for sustainable construction practices has led to increasing interest in self-sensing materials produced with recycled materials. Therefore, this study investigated the effects of replacing natural sand with different contents of red mud (RM) on the rheological, mechanical and self-sensing properties of cementitious sensors containing carbon black nanoparticles. Experimental tests were conducted to evaluate the workability, compressive strength, electrical resistivity, and piezoresistive behavior of mortars produced with replacement levels of 25%, 50%, 75%, and 100% (by volume) of sand by RM. Increasing the replacement level resulted in an approximately 80% gain in the average compressive strength of the mortars but also reduced workability by about 60%. Mortars with 25% replacement exhibited a typical insulating material behavior, while those with replacement level higher than 50% showed high electrical conductivity. The mortars with 50%, 75%, and 100% replacement. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Composites, Nanotechnology, Sustainability |