Effect of calcination on the physical, chemical, morphological, and cementitious properties of red mud

Yıl 2023, , 297 - 306, 19.12.2023

Venkatesh Chava , Sonali Sri Durga Chereddy

https://doi.org/10.47481/jscmt.1376887

Cited By: 6

Öz

Red mud (RM), a by-product of aluminum production, poses environmental concerns with its disposal. This study explored calcining RM at 600 °C for 0–6 hours to utilize it as a cement substitute. Calcination up to 2 hours decreased particle size and increased surface area due to moisture loss, while further calcination reversed these effects. XRF analysis showed high Fe2O3, Al2O3, SiO2 contents. XRD revealed goethite transformed to hematite and gibbsite to alumina. SEM images displayed a loose then denser structure over time. 10% calcined RM incorporated into cement showed 2-hour calcined RM exhibited optimal properties, including high strength (46.27 MPa) and strength activity index (117.24%). SEM confirmed improved C-S-H gel formation with 2-hour calcined RM. In summary, calcining RM optimally at 600 °C for 2 hours allows its effective use as a sustainable cementitious material, providing environ- mental and technical benefits of RM utilization in cement composites.

Anahtar Kelimeler

Compressive strength, Particle analyzer, red mud, Strength activity index, X-ray diffraction analysis

Destekleyen Kurum

CVR College of Engineering

Proje Numarası

Performance and microstructure characterization of red mud based concrete

Kaynakça

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