Determination of Angularity Number

The angularity number is determined from the proportion of voids in a sample of aggregate after compaction in the specified manner. This property is used mainly in the design of mix proportions and in research. Angularity or absence of rounding of the particles of an aggregate is a property which is of importance because it affects the ease of handling of a mixture of aggregate and binder (e.g. the workability of concrete) or the stability of mixtures that rely on the interlocking of the particles. The least angular (most rounded) aggregates are found to have about 33% voids and the angularity number is defined as the amount by which the percentage of voids exceeds 33. The angularity number ranges from 0 to about 12. The angularity number indicates the voids in excess of the voids in perfectly rounded gravel (33%). More angular is the aggregate the higher will be its angularity number.

[rohittripathi]

Thanks sir for such knowledgeable video

[Er.Vatsalrathod]

Good Understanding tutorial Videos 👍✨🏗🪨💧

[amitsarkar]

As per is 16mm sieve is used instead of 14mm sieve.

[qaqcguide]

Please correct oven temperature 100 to 110