Evaluation of Physical Properties of a Metakaolin-Based Alkali-Activated Binder Containing Waste Foam Glass
| Autor: | Petr Šašek, Konstantinos Sotiriadis, Michal Řehoř, Jaroslav Závada, Zuzana Slížková, Petra Mácová |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
metakaolin
Materials science Scanning electron microscope composite materials 0211 other engineering and technologies 02 engineering and technology lcsh:Technology Article Thermal conductivity Thermal insulation 021105 building & construction General Materials Science waste Composite material alkali-activated materials lcsh:Microscopy Porosity Metakaolin lcsh:QC120-168.85 Foam glass Aggregate (composite) lcsh:QH201-278.5 lcsh:T business.industry foam glass 021001 nanoscience & nanotechnology Compressive strength lcsh:TA1-2040 thermal insulation lcsh:Descriptive and experimental mechanics lcsh:Electrical engineering. Electronics. Nuclear engineering lcsh:Engineering (General). Civil engineering (General) 0210 nano-technology business lcsh:TK1-9971 |
| Zdroj: | Materials Volume 13 Issue 23 Materials, Vol 13, Iss 5458, p 5458 (2020) |
| ISSN: | 1996-1944 |
| Popis: | Foam glass production process redounds to large quantities of waste that, if not recycled, are stockpiled in the environment. In this work, increasing amounts of waste foam glass were used to produce metakaolin-based alkali-activated composites. Phase composition and morphology were investigated by means of X-ray powder diffraction, Fourier-transform infrared spectroscopy and scanning electron microscopy. Subsequently, the physical properties of the materials (density, porosity, thermal conductivity and mechanical strength) were determined. The analysis showed that waste foam glass functioned as an aggregate, introducing irregular voids in the matrix. The obtained composites were largely porous (> 45%), with a thermal conductivity coefficient similar to that of timber (< 0.2 W/m∙K). Optimum compressive strength was achieved for 10% incorporation of the waste by weight in the binder. The resulting mechanical properties suggest the suitability of the produced materials for use in thermal insulating applications where high load-bearing capacities are not required. Mechanical or chemical treatment of the waste is recommended for further exploitation of its potential in participating in the alkali activation process. |
| Databáze: | OpenAIRE |
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