Question

5) WHAT ARE THE TYPICAL DOSAGES ( per 100 lbs of cement) FOR THE FOLLOWING ADMIXTURES?

a) Water Reducers b) Accelerators c) Air Entraining d) Super Plasticizers e) Retarders f) Corrosion Inhibitors g) Shrinkage Reducing Admixture

Answer 1

Ans a) The typical dose of water reducer admixture will depend on the type of admixture (Type A, B , C and D) . However, on an average the dose of water reducer admixture is 2 to 6 fl oz / 100 lb cement

Ans b) The typical dosage of accelerating admixture will range from 0.5 to 2% of cement which is 8 to 32 oz / 100 lb of cement

Ans c) The typical dosage of air entraining admixture will range from 0.0005% to 0.05 % of cement which is 0.008 lb to 0.8 oz / 100 lb of cement

Ans d) The typical dosage of superplasticizer admixture will range from 6 to 25 oz / 100 lb

Ans e) The typical dosage of retarder admixture will range from 0.2 to 0.6% of cement which is 3 to 10 oz / 100 lb

Ans f) The typical dosage of accelerating admixture will range from 5 to 15% of cement which is 5 to 15 lb / 100 lb of cement

Ans g) The typical dosage of shrinkage reducing admixture will range from 10 to 18 oz / 100 lb cement