Utilization of Waste Glass in Autoclaved Silica-Lime Materials

This paper aims to investigate the possibility of using waste glass of different colours as a complete substitute for quartz sand in autoclaved silica-lime samples. On the one hand, this increases the possibility of recycling waste glass; on the other hand, it allows obtaining autoclaved materials w...

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Bibliographic Details
Published in:Materials 2022-01, Vol.15 (2), p.549
Main Authors: Borek, Katarzyna, Czapik, Przemysław
Format: Article
Language:English
Subjects:
Bulk density
Calcite
Calcium silicate hydrate
Calcium silicates
Cement
Compressive strength
Construction
Crystallization
Energy consumption
Households
Lime
Per capita
Phase composition
Quartz
Recycling
Sand
Silica
Silica glass
Silicates
Silicon dioxide
Waste utilization
Water absorption
X-ray diffraction
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Summary:This paper aims to investigate the possibility of using waste glass of different colours as a complete substitute for quartz sand in autoclaved silica-lime samples. On the one hand, this increases the possibility of recycling waste glass; on the other hand, it allows obtaining autoclaved materials with better properties. In this research, reference samples with quartz sand (R) and white (WG), brown (BG), and green (GG) waste container glass were made. Parameters such as compressive strength, bulk density, and water absorption were examined on all samples. The samples were examined using a scanning electron microscope with an energy dispersive spectroscopy detector (SEM/EDS) and subjected to X-ray diffraction (XRD) analysis. The WG samples showed 187% higher compressive strength, BG by 159%, and GG by 134% compared to sample R. In comparison to the reference sample, volumetric density was 16.8% lower for sample WG, 13.2% lower for BG, and 7.1% lower for GG. Water absorption increased as bulk density decreased. The WG sample achieved the highest water absorption value, 15.84%. An X-ray diffraction analysis confirmed the presence of calcite, portlandite, and tobermorite phases. Depending on the silica aggregate used, there were differences in phase composition linked to compressive strength. Hydrated calcium silicates with varying crystallisation degrees were visible in the microstructure image.
ISSN:1996-1944
1996-1944
DOI:10.3390/ma15020549