Los Angles

Used for estimation of abrasion value of coarse aggregate.

(i) A hollow steel cylinder mounted on a sturdy frame on ball bearings capable of rotating about its axis in a horizontal position.
(ii) A detachable shelf fitted inside the cylinder at a distance of 1250 mm from the opening measured along the circumstance in the direction of rotation.
(iii) A motor with reduction gear which runs the drum at 30-33 rpm.
(iv) A tray.
(v) A revolution counter.
(vi) Abrasive charge consisting of 12 steel ball approximately 48 mm dia and each weighing between 390 and 445 g. Suitable for operation on 440 v, 50 Hz, 3 phase supply.