Related Questions

Alumina, silica, lime and iron oxide are the basic raw material for the manufacture of portland cement. The component of Portland cement which first hardens is
A 5CaO . 3Al2O3
B 3CaO . Al2O3
C 3CaO . SiO2
D 2CaO . SiO2
As compared to ordinary portland cement, high alumina cement has
A Higher initial setting time but lower final setting time
B Lower initial setting time but higher final setting time
C Higher initial and final setting times
D Lower initial and final setting times
As compared to ordinary portland cement, use of pozzuolanic cement
A Reduces workability
B Increases bleeding
C Increases shrinkage
D Increases strength
Ordinary Portland Cement এর Initial Setting Time কত?
A ৫ মিনিট
B ১০ মিনিট
C ৩০ মিনিট
D ৫ ঘণ্টা
The normal consistency of ordinary Portland cement is about
A 10%
B 20%
C 30%
D 40%
Addition of pozzolana to ordinary Portland cement increases
A Bleeding
B Shrinkage
C Permeability
D Heat of hydration
As per IS specifications, the maximum final setting time for ordinary Portland cement should be
A 30 minutes
B 1 hour
C 6 hours
D 10 hours
The initial setting time for ordinary Portland cement as per IS specifications should not be less than
A 10 minutes
B 30 minutes
C 60 minutes
D 600 minutes
According to IS specifications, the compressive strength of ordinary Portland cement after three days should not be less than
A 7 MPa
B 11.5 MPa
C 16 MPa
D 21 MPa
The addition of gypsum to portland cement helps in :
A Increasing the strength of cement
B Rapid setting of cement
C Preventing rapid setting of cement
D Reduction in the cost of cement

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