Low heat cement is produced by maintaining the percentage of tricalcium aluminate below 6% by increasing the proportion of C2S. A small quantity of tricalcium aluminate makes the concrete to produce low heat of hydration. Low heat cement suitable for mass concrete construction like gravity dams, as the low heat of hydration, prevents the cracking of concrete due to heat.
This cement has increased power against sulphates and is less reactive and initial setting time is greater than OPC.
Characteristics of Low Heat Cement
Low heat of hydration is 20% lesser than that of OPC cement.
The amount of water required for hydration is low.
High work-ability is obtained as the concrete is fluidly in nature
Good volume stabilization.
Initial strength is low but the high growth rate of final strength.
More high technical strength of concrete.
Excellent impact erosion.
Excellent wear resistance.
Lower temperature upward value of heat insulation.
Super-high performance of chemical corrosion resistance.
Excellent resistance to drying shrinkage.
Good resistance to rupture.
Compatibility for Admixtures:
Low Heat Cement is compatible with:
Chemical admixtures for Concrete.
Supplementary cementitious Materials for Use with Portland cement: Fly ash, Slag – ground granulated Iron blast-furnace, Amorphous silica.
Its properties,uses,advantage and dis advantages are as follows:
