BS 812 is the British Standard for testing aggregates. The main objective of the BS 812 series is to provide the best industry guidance to ensure construction materials contribute to the structural integrity of your civil engineering works.
BS 812-105.1 is the first section of the 105th part of the BS 812 series that describes the method for determining the flakiness index of coarse aggregate.
BS 812-105.1 on flakiness index of coarse aggregate is useful for:
The flakiness index test is a very important test to be performed on aggregate giving the percentage of flaky aggregate present in the total aggregate sample. Aggregate particles are classified as flaky when they have a thickness of less than 0.6 of their mean sieve sizes, this size is taken as the mean of the limiting sieve apertures used for determining the size fraction in which the particle occurs.
The flakiness index of an aggregate sample is found by separating the flaky particles and expressing their mass as a percentage of the mass of the sample tested.
In this regard, BS 812-111 provides the testing apparatus, sampling of aggregates and preparation of test specimens as well as includes test procedure to determine the flakiness index/ particle shape of aggregates.
As a result, if you are an aggregate manufacturer, complying with BS 812-111 can demonstrate the quality, performance, and dependability of your products, achieving the structural integrity required for building works.
Moreover, flaky aggregates tend to produce seals with fewer voids due to their tendency to pack more tightly and are thus used in the construction of highway pavement and concrete structures.