New ways of utilizing lime in modern building technology

Yaroslav Yakymechko , Roman Jaskulski , Iryna Lutsyuk

Abstract

The article presents new methods of improving technological properties of quicklime as a binder. The sources of high hydraulic activity of calcium oxide were investigated and discussed. It was shown that during CaO hydration a layered structure with a smaller number of symmetry elements is formed and the molar volume increases, which leads to system growth and accelerates the hydration reaction. The use of additives based on phosphoric, boric and sulphuric acids and their salts changes the conditions of the individual stages of the CaO hydration process, thus increasing the strength development of lime stone by 1.5 - 2.5 times. It was shown that in the presence of SO42- anions, portlandite crystallises mainly in the form of thin hexagonal plates, which influence the mechanism of development of lime stone flexural strength. On the basis of the obtained results, binders containing quicklime, hydraulically active component and sulphates were prepared. It was found that the introduction of quicklime into building plaster prolongs the setting time, while hydration hardening СаО was provided. Such mixed gypsum-based binders with the addition of quicklime are characterized by high water resistance and compression strength typical for gypsum stone.
Author Yaroslav Yakymechko (FCEMP / ICEn)
Yaroslav Yakymechko,,
- Insitute of Civil Engineering
, Roman Jaskulski (FCEMP / ICEn)
Roman Jaskulski,,
- Insitute of Civil Engineering
, Iryna Lutsyuk
Iryna Lutsyuk,,
-
Journal seriesMaterials Structures Technology, ISSN 2570-6616, (0 pkt)
Issue year2019
No(2) 1
Pages61-69
Publication size in sheets0.5
Keywords in EnglishQuicklime Portlandite Hydration hardening Gypsum Hydration
DOIDOI:10.31448/mstj.02.01.2019.61-69
Languageen angielski
Score (nominal)5
Score sourcejournalList
ScoreMinisterial score = 5.0, 11-02-2020, ArticleFromJournal
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