Influence of Waste Plastic Aggregate and Water-Repellent Additive on the Properties of Lightweight Magnesium Oxychloride Cement Composite
| Autor: | Adam Pivák, Michal Lojka, Martina Záleská, Milena Pavlíková, Zbyšek Pavlík, Filip Antončík, Ondřej Jankovský |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Materials science
Composite number 0211 other engineering and technologies 02 engineering and technology magnesium oxychloride cement mechanical properties chemistry.chemical_compound Thermal conductivity Thermal insulation Volumetric heat capacity 021105 building & construction hygric properties General Materials Science Composite material Instrumentation Fluid Flow and Transfer Processes Polypropylene Cement Aggregate (composite) Moisture business.industry Process Chemistry and Technology General Engineering water resistance 021001 nanoscience & nanotechnology Computer Science Applications chemistry hydrophobic additives 0210 nano-technology business waste expanded polystyrene thermo-physical parameters |
| Zdroj: | Applied Sciences Volume 9 Issue 24 |
| ISSN: | 2076-3417 |
| DOI: | 10.3390/app9245463 |
| Popis: | The aim of the present study is to improve the thermal and hygric performance of magnesium oxychloride (MOC) cement composites by the incorporation of waste plastic-based aggregate and the use of the inner and surface hydrophobic agents. The crushed waste expanded polypropylene particles were used as a full replacement of natural silica sand. The aggregate properties were evaluated in terms of their physical and thermal parameters. The caustic calcined magnesite was studied by SEM, XRF, and XRD spectroscopy. The MOC cement composites were characterized by SEM/EDS, XRD, and FT-IR spectroscopy and measurement of their structural properties, strength parameters, thermal conductivity, and volumetric heat capacity. Assessment of water- and water vapor transport properties was also conducted. The results show significantly improved thermal parameters of MOC cement composite containing expanded polypropylene (EPP) as aggregate and indicate high efficiency of surface hydrophobic agent (impregnation) as a barrier against the transport of liquid and gaseous moisture. The resulting lightweight EPP-MOC cement composite with improved thermal insulation function and suitable mechanical properties can be used to produce thermal insulation floors, ceilings, or wall panels reducing the operational energy demand of buildings. |
| Databáze: | OpenAIRE |
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