What is the minimum compressive strength of 53 OPC?

53 MPa
53-grade cement stands for an Ordinary Portland Cement (OPC) having a minimum compressive strength of 53 MPa or 53 N/mm2 or 530 kg/cm2 after 28 days.

Which of the following Cannot be added in 33 Grade OPC after burning stage?

Explanation: The details and specifications regarding the manufacture of 33 grade OPC are mentioned in IS 269. It says that after burning, only certain element like gypsum, water, performance enhancers, colouring agent can be added. More raw material-clay cannot be added.

What is the minimum compressive strength of cement at the age of 3 days for ordinary portland cement of grade 33?

As per Indian Standards

Indian Standard Codes
Grade	33 Grade
Setting Time	3 days	28 Days
Avg. Compressive Strength in N/mm^2	16	33
Fineness in m^2 /kg, Min.	225

How do you measure the compressive strength of 53 grade cement?

What Does 33 43 and 53 Grades of Cement Mean? By the grade of cement as 33, 43, 53, the values 33, 43, 53 indicate the compressive strength of cement cube in Mpa (N/mm2) after 28 days of curing, where cement mould size is 7.06 cm x 7.06 cm x 7.06 cm.

What should be the maximum fineness for Grade 53 OPC?

When a 53 grade ordinary Portland cement is tested for its physical requirements, then it must satisfy the following specifications given by IS 12269. The fineness value of 53 grade OPC when tested by Blaine’s air permeability method shall not be less than 225 m2/kg.

What is compressive strength of OPC?

53 Grade OPC Cement simply means that 28-days compressive strength of the cement-mortar cubes prepared out of that cement in a standard manner will be of 53 MPa. Strength test of cement is carried out on the cubes of hardened Cement-Sand mortar; not on a neat cement paste. Usually compressive test is carried out.