Polymer composites based on gypsum matrix

The role of polymers as retarder additives is to prolong the workability connected with setting time of gypsum. Various cellulose derivatives, soluble in water in concentration up to 1,5% by weight were applied taking different water/binder ratio. The hydration process of calcium sulfate hemihydrate...

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Bibliographic Details
Main Authors: Mucha, Maria, Mróz, Patrycja, Kocemba, Aleksandra
Format: Conference Proceeding
Language:English
Subjects:
ADDITIVES
Bend strength
CALCIUM
Calcium sulfate
Calcium sulfate hemihydrate
CALCIUM SULFATES
CALORIMETRY
CELLULOSE
CONCENTRATION RATIO
FLEXURAL STRENGTH
GYPSUM
Gypsum plaster
HYDRATES
HYDRATION
MATERIALS SCIENCE
Mechanical properties
MICROSTRUCTURE
Polymer matrix composites
POLYMERS
SCANNING ELECTRON MICROSCOPY
WATER
Weight
Workability
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Summary:The role of polymers as retarder additives is to prolong the workability connected with setting time of gypsum. Various cellulose derivatives, soluble in water in concentration up to 1,5% by weight were applied taking different water/binder ratio. The hydration process of calcium sulfate hemihydrate (gypsum binder) into dihydrate (gypsum plaster) was observed by setting and calorimetric techniques. Scanning electron microscopy confirmed that the gypsum microstructure was varied when polymers are used. The mechanical properties of gypsum plasters were studied by bending strength test and they are correlated with sample microstructure
ISSN:0094-243X
1551-7616
DOI:10.1063/1.4949694