Physical Properties Of Cement

The physical properties prescribed are about

(a) setting time

(b) strength

(c) soundness

(d) fineness of grinding

IS 269-1975 prescribes the requirement and the standard procedure to determine the above properties.

Table shows the physical properties prescribed for ordinary portland cement.

Table: Requirement of physical properties of cement

Physical property	Standard prescribed
(a) Setting time             (i) Initial             (ii) Final   (b) Compressive strength of mortar with standard sand             (i) After 3 days ± 1 hour             (ii) After 6 days ± 2 hours               Tensile strength             (i) After 3 days             (ii) After 7 days	Not less than 30 min Not more than 600 min       Not less than 16 N/mm2 Not less than 22 N/mm2     Not less than 2.0 N/mm2 Not less than 2.5 N/mm2
(c) Soundness             (i) By Le-chatelier method             (ii) By autoclave method   (d) Fineness             (i) Residue by weight on IS 90 micron sieve             (ii) Specific surface by air permeability method	Expansion not more than 10 mm Expansion not more than 0.5%    Not more than 10%   Not less than 2250