Appendix B 5 Product Specifications
The crushed rock shall be free from vegetable matter and lumps or balls of clay and shall comply with the relevant requirements of Table B.4.
|Class 1||Class 2||Class 3||Class 4|
|Liquid Limit % (max)||30||30||35||40|
|Plasticity Index (max or range) (1)||2-6||0-6||12||20|
|California Bearing Ratio % (min) (2)||–||–||30||15|
|PI x % passing 0.425 AS sieve (max)||–||–||–||600|
|Flakiness index % (max)||35||35||–||–|
|crushed particles % (max) (3)||60||60||50||–|
- Minimum value for PI specified to ensure the material is sufficiently impermeable to resist penetration of water through thin surfacing layers.
- Value applicable to material passing 19.0 mm sieve: compacted at Optimum Moisture Content to 98% of Modified Maximum Dry Density as determined by test; then soaked for 4 days prior to CBR testing.
- Applicable to crushed river gravels.