E3S Web Conf.
Volume 212, 20202020 International Conference on Building Energy Conservation, Thermal Safety and Environmental Pollution Control (ICBTE 2020)
|Number of page(s)||8|
|Published online||26 November 2020|
Effect of calcium sulfoaluminate additive on linear deformation at different humidity and strength of cement mortars
Belarusian National Technical University, Minsk, Belarus.
2 Christ (Deemed to be University), Bangalore, India.
3 Politechnika Bialostocka, Poland.
* Corresponding author: firstname.lastname@example.org
The effect of calcium Sulfoaluminate additives (CSA) on the compression and bending strength of mortar, as well as linear deformation of prism samples at different environmental humidity was studied. Test results indicate that bending strength of mortars with CSA and the referent at the age of 28 days are practically equal. Compressive strength of mortars with CSA reduced by 20 ... 23% for all dosages of CSA. Relative linear deformations depend on the humidity of the environment. At a humidity of 100%, the relative linear deformations are positive and the expansion increases with increasing dosage of the expanding additive. When hardening in dry air at a humidity of 55%, the greatest shrinkage deformations were observed for mortars with CSA. We can conclude that the expanding effect of CSA is fully manifested at high humidity, i.e. under construction conditions, this means very high-quality moisture care for concrete structures.
Key words: Shrinkage / cracks / calcium Sulfoaluminate additives / expanding additives
© The Authors, published by EDP Sciences, 2020
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