Study of modified gypsum binder

•Kinds of additive have influence on the hydration process and the gypsum structure.•The additive content enhances the compressive strength and water resistance of gypsum.•With additives a denser finecrystalline structure is formed.•Taurit and silica introduced together increase the durability chara...

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Bibliographic Details
Published in:Construction & building materials 2017-09, Vol.149, p.535-542
Main Authors: Kondratieva, Nataliia, Barre, Maud, Goutenoire, François, Sanytsky, Myroslav
Format: Article
Language:English
Subjects:
Additive
Additives
Analysis
Chemical properties
Chemical Sciences
Gypsum
Gypsum building materials
Hydration
Hydration (Chemistry)
Hydration products
Material chemistry
Microstructure
Microstructures
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Summary:•Kinds of additive have influence on the hydration process and the gypsum structure.•The additive content enhances the compressive strength and water resistance of gypsum.•With additives a denser finecrystalline structure is formed.•Taurit and silica introduced together increase the durability characteristics. Nowadays the addition of small amounts of chemical additives allows developing new types of binding materials. The effect of microadditives on the performance of β-hemihydrate gypsum has been studied. 1% content of complex additive contributes to enhancement of compressive strength and water resistance in modified samples as compared to reference one. These studies showed that additives accelerate the rate of hydration and lead to the formation of a dense and well-compacted texture of crystals, thereby imparting, to gypsum matrix, higher strength and better water resistance than the reference materials.
ISSN:0950-0618
1879-0526
DOI:10.1016/j.conbuildmat.2017.05.140