Compressive strength of cement test procedure pdf

With one test we can determine various aspects of cement and can decide the suitable types of cement for the construction site. Where P is the percentage of water required for producing a paste of standard consistency. Then compressive strength for each cube on their respective test day is calculated using the formula:. This is because if we choose large size cubes, shrinkage and cracks will develop. This will make us unable to perform the compressive strength test.

Why curing of concrete is important Different way of curing. Log in Now. Join for free or log in to continue reading Remember Me! Don't have account, Join Here. Forgot Password Lost your password? Ask A Question. What is compressive strength of commonly used concrete? What is compressive strength after 7 days and 14 days? Which test is most suitable for concrete strength?

What is the size of concrete cubes used for testing? Which machine is used for concrete strength test? What is the rate of loading on compression testing machine? Previous article. Remove the specimen from water after specified curing time and wipe out excess water from the surface. Take the dimension of the specimen to the nearest 0. Align the specimen centrally on the base plate of the machine. Rotate the movable portion gently by hand so that it touches the top surface of the specimen.

Compressive Strength of Cement 1. Reaffirmed- May 4. Mix it dry with a trowel for one minute and then with water until the mixture is of uniform colour. The quantity of water to be used shall be as specified in step 2. The time of mixing shall in any event be not less than 3 min and should the time taken to obtain a uniform colour exceed 4 min, the mixture shall be rejected and the operation repeated with a fresh quantity of cement, sand and water.

Moulding Specimens - In assembling the moulds ready for use, treat the interior faces of the mould with a thin coating of mould oil. Place the assembled mould on the table of the vibration machine and hold it firmly in position by means of a suitable clamp.

Attach a hopper of suitable size and shape securely at the top of the mould to facilitate filling and this hopper shall not be removed until the completion of the vibration period.