Investigation of gypsum composites with different lightweight fillers

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21110%2F21%3A00350452" target="_blank" >RIV/68407700:21110/21:00350452 - isvavai.cz</a>
Result on the web
<a href="https://doi.org/10.1016/j.conbuildmat.2021.123791" target="_blank" >https://doi.org/10.1016/j.conbuildmat.2021.123791</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.conbuildmat.2021.123791" target="_blank" >10.1016/j.conbuildmat.2021.123791</a>

Result language
angličtina
Original language name
Investigation of gypsum composites with different lightweight fillers
Original language description
Structure and behaviour of gypsum composites, prepared from flue gas desulfurization binder and three types of fine fillers (silica sand, perlite, expanded clay aggregate and waste polyurethane foam) were studied. Their structure and composition were investigated by SEM, XRD and porosimetry, mechanical, thermal and moisture properties were tested. It was found that the type and surface quality of the aggregates affect the shape and size of gypsum crystals significantly. Largest gypsum crystals are formed in the mortars with non-porous particles. With increasing surface roughness of particles the strength of the mortars increases. Mortar with expanded clay filler has the highest strength, its compressive strength was comparable with the compressive strength of the reference material with silica sand, but its bulk density was more than 40% lower and its thermal conductivity decreased to 20% of the thermal conductivity of reference material. The mortar with waste polyurethane foam has the lowest strength (2.9 MPa at 7 days) but best thermal conductivity (0.211 W/m.K) of all materials. Technical properties of composite with waste polyurethane are still sufficient for building purposes and its environmental impact is lowest of all materials
Czech name
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Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
20505 - Composites (including laminates, reinforced plastics, cermets, combined natural and synthetic fibre fabrics; filled composites)

Project
<a href="/en/project/GA19-08605S" target="_blank" >GA19-08605S: Influence of fillers on the structure and properties of calcium sulphate composites</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2021
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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