What is BS EN 933-5 - Percentage of crushed and broken surfaces in coarse aggregate particles about?
BS EN 933 is a European Standard on tests for geometrical properties of aggregates. The main aim of the BS EN 933 series is to provide the best industry guidance to ensure construction materials contribute to the structural integrity of civil engineering works.
BS EN 933-5 is the fifth part of the BS EN 933 series that specifies a method for the determination of the percentage of particles with crushed and broken surfaces in a sample of natural coarse aggregate. It applies to gravel or mixed aggregate containing gravel.
The test method specified in this part of BS EN 933 is applicable to particle size fractions di/Di where Di k 63 mm and di U 4 mm.
Note 1: For aggregate sizes with D > 63 mm and/or d < 4 mm the test may be carried out on particle size fractions di/Di where Di k 63 mm and di U 4 mm.
Note 2: For coarse aggregate between 4 mm and 20 mm the percentage of crushed or broken surfaces are linked to the flow coefficient and can therefore be used in association with the test method specified in EN 933-6."
Who is BS EN 933-5 - Percentage of crushed and broken surfaces in coarse aggregate particles for?
BS EN 933-5 on percentage of crushed and broken surfaces in coarse aggregate particles is useful for:
- Construction materials manufacturers and suppliers
- Civil engineers
- Contractors
- Cement production companies
- Quality control and testing authorities
Why should you use BS EN 933-5 - Percentage of crushed and broken surfaces in coarse aggregate particles?
A crushed particle is an angular, rough or broken surface of an aggregate particle created by crushing or by other mechanical means. The purpose of the percentage determination of crushed and broken surfaces is to maximize shear strength by increasing inter-particle friction in either bound or unbound aggregate mixtures and provide stability for surface treatment aggregates and provide increased friction and texture for aggregates used in pavement surface courses.
In this regard, BS EN 933-5 provides the requirements for apparatus, reagents, test preparation and test procedure to determine the percentage of crushed and broken surfaces in coarse aggregate particles.
As a result, if you are a manufacturer of aggregates, conforming to BS EN 933-5 can demonstrate the performance and credibility of your products.
