Flakiness and Elongation Test

The flakiness and elongation index tests are crucial assessments that must be made on aggregate in the lab. This test reveals the proportion of flaky and elongate aggregate in the sample's overall aggregate.

More so than the qualities of hardened concrete, aggregate form, size, and surface roughness significantly influence the properties of freshly mixed concrete.

In comparison to smooth, rounded compact aggregate, angular, flaky, rough-textured, and elongated aggregate particles require more water to form workable concrete. To keep the water-cement ratio constant, the cement component of such irregularly shaped aggregate must also be raised.

When used to build pavement, elongated and flaky aggregate may cause the pavement to break because of their erratic positioning under repeated loading and vibration.

It's critical to maintain a tolerable level of flaky and elongated aggregate. In general, flaky and elongated aggregate should be avoided or kept to no more than 15% of the overall weight of the aggregate.