LIGHTWEIGHT MORTARS WITH EXPANDED PERLITE MODIFIED BY ADMIXTURES
Journal Title: Structure and Environment - Year 2017, Vol 0, Issue 2
Abstract
The lightweight insulating cement mortars with expanded perlite reveal high porosity bound with the presence of this filler. However, their properties are lowered due to the absorption of water. The studies were performed with aim to improve the composition of cement – perlite mortars and their parameters, such as, density and the percentage of absorbed water by use of admixtures. The three series of mortars of similar consistency were produced with cement to perlite volume ratio of 1/3, 1/5 and 1/7 respectively. The water repellent and air entraining agents were used. The density and water absorption were measured and the observations of microstructure were carried out under SEM. The transport of water in the mortars was significantly slower and limited by use of admixtures. The proportions giving the lowered density at fairly low absorbability complying with the standard requirements have been pointed out. The advantageous effect of water repellent and air entraining agent has been proved
Authors and Affiliations
Wiesława Nocuń-Wczelik, Maciej Nowak, Ewa Kapeluszna
Keywords
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