Assessment of Physical Properties and Potential Elemental Leaching from Bauxite Tailing-Based Alkali-Activated Materials
Igor Alexandre Rocha Barreto, Marcondes Lima da Costa
TL;DR
This study explores using bauxite tailings to create strong, durable alkali-activated materials with low water absorption and good acid resistance.
Contribution
The novelty lies in using Amazon region bauxite washing clay as a precursor for alkali-activated materials and evaluating their physical and elemental leaching properties.
Findings
The synthesized materials showed low water absorption (18.61%) and high compressive strength (25.83 MPa).
The material released Al, Si, and Na during acid leaching, which are essential for geopolymer formation.
Bauxite washing clay is a suitable precursor due to its high aluminum and silica content.
Abstract
Alkali-activated materials (AAMs) are emerging materials with enhanced properties, including high compressive strength, low shrinkage, adjustable curing rates, resistance to acids and fire, and low thermal conductivity. These materials are synthesized by reacting aluminosilicate-rich precursors with highly alkaline solutions. Given these advantageous characteristics, this study investigates the synthesis of AAMs using bauxite washing clay from the Amazon region. Specimens were prepared with bauxite washing clay and a 1.3 M NaOH solution. The raw material was characterized by using X-ray diffraction (XRD), thermal analysis (TGA-DSC), Fourier transform infrared spectroscopy, and X-ray fluorescence. The specimens were further analyzed by XRD and tested for compressive strength, water absorption, apparent porosity, and acid leaching using HNO3. The bauxite washing clay sample primarily…
Genes, proteins, chemicals, diseases, species, mutations and cell lines named across the full text — each resolved to its canonical identifier and authoritative record.
Click any figure to enlarge with its caption.
Figure 1
Figure 2
Figure 3
Figure 4
Figure 5
Figure 6
Figure 7
Figure 8
Figure 9
Figure 10
Figure 11Peer Reviews
No public reviews on file for this paper yet. If you reviewed it on a platform where reviews are public (OpenReview, ICLR, NeurIPS, ICML), you can paste yours below so the community can read it here.
Videos
No videos yet. Explain this paper in a talk, walkthrough, or lecture? Add one.
Taxonomy
TopicsBauxite Residue and Utilization · Concrete and Cement Materials Research · Recycling and utilization of industrial and municipal waste in materials production