MAGNESIUM OXYSULPHATE CEMENT: CHANGE IN PROPERTIES ON ADMIXING SODIUM BICARBONATE AS AN ADDITIVE

Authors: Ritu Mathur1* and Sanjay K. Sharma2

1* Department of Chemistry, R.R. College, Alwar (India);2 Computational and Green Chemistry Research Laboratory,Institute of Engineering & Technology, MIA, Alwar (India);Email: ritu.chem@gmail.com

Sodium bicarbonate plays an important role, after admixing in Magnesium Oxysulphate Cement (Sorel’s Cement), on strength and durability of the product. It’s incorporation in the matrix as additive in powerded form as well as saturated solution is studied in detail.  Powdered form of NaHCO₃ increases the compressive strength and watertightness of the product, whereas its  incorporation as saturated solution does not contribute to strength and durability of Sorel’s Cement. setting periods, weathering effects and linear changes were also studied for both the forms of the additive.

Keywords : Magnesium Oxysulphate Cement, Sorel’s Cement, Compressive Strength, Moisture ingress, Setting periods, Weathering effects, Linear changes.