# Testing of industrial products - Aggregates for construction

## Symbols

- Ab
_{24} - Water absorption after 24 hours soaking
- C
- The average of the friction measurements obtained from PSV tests on four specimens made using the control stone
- C
_{c} - Percentage of crushed or broken particles
- C
_{tc} - Percentage of totally crushed or broken particles
- C
_{r} - Percentage of rounded particles
- C
_{tr} - Percentage of totally rounded particles
- C
_{r1} - Repeatability coefficient of variation
- C
_{R1} - Reproducibility coefficient of variation
- d
- Lower size of an aggregate (mm)
- D
- Upper size of and aggregate (mm)
*F*- particle density of an aggregate (kg/m
^{3})
*l*- liberation factor
*f*- particle shape factor
*g*- size range factor
- M
- Mass of a test portion (kg)
- m
_{6} m_{7} - Masses used to determine acid-soluble sulfate
- N
- Number of laboratories
- p
_{p} - Pre-dried particle density
- p
_{ssd} - Saturated, surface-dry particle density
- PSV
- The value derived from PSV tests on four specimens made using an aggregate, corrected using the results of PSV tests on four specimens made using the control stone (PSV = S + 52.5 - C)
- r
_{1} - Repeatability limit
- R
_{1} - Reproducibility limit
- S
- The average of the friction measurements obtained from PSV tests on four specimens made using an aggregate under test
- S
_{r1} - Repeatability standard deviation
- S
_{R1} - Reproducibility standard deviation
- S
_{Spec} - Between-test-specimen standard deviation
- t
- Tabulated value of the t-distribution
- W
- A range
- X
- A test result, or an average of some test results