Research Article
Utilization of bauxite residue (red mud) in the manufacture of geopolymer concrete bricks
@INPROCEEDINGS{10.4108/eai.16-11-2022.2326118, author={Maya Santi and Hurul ‘Ain}, title={Utilization of bauxite residue (red mud) in the manufacture of geopolymer concrete bricks}, proceedings={Proceedings of the First Jakarta International Conference on Multidisciplinary Studies Towards Creative Industries, JICOMS 2022, 16 November 2022, Jakarta, Indonesia}, publisher={EAI}, proceedings_a={JICOMS}, year={2022}, month={12}, keywords={bauxite; waste; geopolymer and concrete}, doi={10.4108/eai.16-11-2022.2326118} }- Maya Santi
Hurul ‘Ain
Year: 2022
Utilization of bauxite residue (red mud) in the manufacture of geopolymer concrete bricks
JICOMS
EAI
DOI: 10.4108/eai.16-11-2022.2326118
Abstract
The environmental problems associated with bauxite residue are a large amount of waste and the high pH value. The solution that can be done to reduce pollution is to utilize bauxite residue. In this study, bauxite residue was used as a raw material for making concrete bricks without using cement. The methods used are casting, curing, and testing. The x-ray diffraction test results found 4.6% Bayer sodalite and the x-ray fluorescence test results found 11.30% Na2O, indicating the amount of NaOH in the bauxite residue. In addition, the percentage of SiO2, Al2O3, and Fe2O3 67.27% indicates that the bauxite residue has pozzolanic properties so that it can be used as a binder. However, the compressive strength test results only yielded an average value of 1.25 MPa, and a water absorption value of 6%, so further research is needed to design a mixture with optimal compressive strength.
