The Civilab manufactured proportional caliper Consists of a steel base with two fixed posts and a swinging arm between them. Its a specialised testing tool used to determine the percentage of flat, elongated, or flat and elongated particles in coarse aggregates retained on a 9.5 mm sieve. The arm axis is positioned so that the ends maintain a constant ratio of 1:2 or 1:3 Conforms to AS1141.14
Shopping Cart