Aggregate with a least lateral dimension less than 0.6 times the mean dimension is called what?

Aggregate with a least lateral dimension less than 0.6 times the mean dimension is called what?

• A. Flaky Aggregate
• B. Angular Aggregate
• C. Rounded Aggregate
• D. Irregular Aggregate

Answer: (A)

Shape classification of aggregates is about how thick a particle is in relation to its overall size. When the smallest dimension of a particle is less than 0.6 times its mean dimension, the particle is defined as flaky. That 0.6 threshold captures the idea that one dimension is disproportionately small, making the particle seem thin or wafer-like. Flaky particles don’t pack as well and can hinder compaction, reduce interlock, and increase voids in concrete or asphalt, which is why this specific criterion is used to label them. The other terms refer to surface texture or general irregularity rather than this precise dimension ratio. So the classification that fits the given criterion is flaky aggregate.

Shape classification of aggregates is about how thick a particle is in relation to its overall size. When the smallest dimension of a particle is less than 0.6 times its mean dimension, the particle is defined as flaky. That 0.6 threshold captures the idea that one dimension is disproportionately small, making the particle seem thin or wafer-like. Flaky particles don’t pack as well and can hinder compaction, reduce interlock, and increase voids in concrete or asphalt, which is why this specific criterion is used to label them.

The other terms refer to surface texture or general irregularity rather than this precise dimension ratio. So the classification that fits the given criterion is flaky aggregate.