Open AccessInfluence of fillers on structure and behaviour of gypsum mortars
Author(s) -
Magdaléna Doleželová,
Jitka Krejsová,
Lenka Scheinherrová,
Alena Vimmrová
Publication year - 2020
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/800/1/012013
Subject(s) - gypsum , perlite , mortar , materials science , microstructure , filler (materials) , composite material , aggregate (composite)
Gypsum mortars with different types of lightweight fillers were studied. The importance of gypsum as one of the most environmentally friendly building binder increases nowadays and new ways of its utilization are searched. Using of fillers in the gypsum is generally not necessary, because gypsum does not shrink, but they can be used for economic reasons or to improve the thermal properties or fire resistance of the gypsum material. We studied the structure and properties of the gypsum mortars with three types of lightweight fillers (expanded perlite, expanded clay aggregate, recycled PUR) and compared them with the gypsum mortar with siliceous sand. The SEM analyses were performed together with the mechanical tests. The roughness of the fillers surface and its influence on the structure and properties was studied by confocal laser scanning microscopy. It was found, that the type of the filler has principal impact on the microstructure of gypsum mortars and their properties.