Determination of Flakiness and Elongation
Flaky or elongated aggregates can negatively impact the workability of a concrete mix and may compromise its long-term durability. In bituminous mixtures, flaky aggregates create a harsh mix, increasing the risk of cracking and breaking during compaction by rolling.
3.1 Shape Index Caliper
3.1 Shape Index Caliper 42-0821
Designed to measure the ratio of length to width of individual aggregate particles.
Vernier Caliper
Vernier Caliper Range 0 to 200mm x 0.02mm 81-0588
This precision Vernier caliper offers four types of measurements: inside, outside, depth, and step. It features a dual reading scale (metric and inch) with a 14° beveled Vernier scale for minimized parallax reading errors, and a knurled locking nut for secure positioning. Manufactured from hardened stainless steel for enhanced durability and rigidity, with a satin finish for easy reading.
Conforms to DIN 862 standards.
Length Gauge
Length Gauge 42-0820
Manufactured to the dimensions specified in BS 182.
Flakiness Gauge
Flakiness Gauge 42-0410
Constructed of heavy gauge sheet steel to the dimensions specified in BS 812.
Set of Flakiness Sieves
Set of Flakiness Sieves 42-0600
Comprising 1 each of, 4.9 mm, 7.2 mm, 10.2 mm, 14.4 mm, 19.7 mm, 26.3 mm and 33.9 mm
Standard BS 813
Grid Sieve
Grid Sieves
A series of grid sieves formed from 5 mm diameter steel parallel bars securely fixed in a metal frame.