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INFLUENCE OF MOISTURE ON THE PROPERTIES OF TERNARY GYPSUM-BASED COMPOSITES

Rehacek, S.; Dobias, D.; Kolisko, J.; Dolezelova, M.
Abstract:
The article describes behavior of ternary gypsum-based composites, especially the changes of properties caused by the influence of moisture. The ternary mortars are composed from gypsum, hydraulic lime, different types of pozzolan and standard sand. Pozzolans in the mixture react with hydraulic lime and form CSH and CAH phases. Presence of these phases improves resistance of gypsum against the moisture. The way of samples storage affects the development of materials structure and properties of gypsum-based mortars. The basic physical, mechanical and thermal properties of samples stored in the laboratory environment and under the water are compared. The storage in the water has the greatest impact on the properties of all materials, especially on the mechanical properties. While the strength of pure gypsum mortar, stored in the water, decreased significantly and after one year in the water environment the samples were nearly destroyed, the samples with pozzolan admixtures evinced the improvement of mechanical properties, when stored in water.
SGEM Research areas:
Year:
2018
Type of Publication:
In Proceedings
Keywords:
ternary gypsum-based composites; moisture; pozzolan; resistance against water; thermal analyses
Volume:
18
SGEM Book title:
18th International Multidisciplinary Scientific GeoConference SGEM 2018
Book number:
6.3
SGEM Series:
International Multidisciplinary Scientific GeoConference-SGEM
Pages:
257-264
Publisher address:
51 Alexander Malinov blvd, Sofia, 1712, Bulgaria
SGEM supporters:
Bulgarian Acad Sci; Acad Sci Czech Republ; Latvian Acad Sci; Polish Acad Sci; Russian Acad Sci; Serbian Acad Sci & Arts; Slovak Acad Sci; Natl Acad Sci Ukraine; Natl Acad Sci Armenia; Sci Council Japan; World Acad Sci; European Acad Sci, Arts & Letters; Ac
Period:
02-08 July, 2018
ISBN:
978-619-7408-52-2
ISSN:
1314-2704
Conference:
18th International Multidisciplinary Scientific GeoConference SGEM 2018, 02-08 July, 2018
DOI:
10.5593/sgem2018/6.3/S26.034
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