A sample retained on the 4.75 mm (No. 4) sieve is collected and the number of particles with fractured faces is compared to the number of particles without fractured faces. A fractured face is defined as an “angular, rough, or broken surface of an aggregate particle created by crushing, by other artificial means, or by nature” (ASTM, 2000). In order for a face to be considered fractured it must constitute at least 25 percent of the maximum cross-sectional area of the rock particle.
Standard Test Methods
- ASTM D 5821: Determining the Percentage of Fractured Particles in Coarse Aggregate
- American Society for Testing and Materials (ASTM). (2000). Annual Book of ASTM Standards, Section four: Construction. Vol. 4.03. American Society for Testing and Materials. West Conshohocken, PA.↵