California Bearing Ratio Test Apparatus(Laboratory):
The CBR method is used for finding relative bearing ratio and expansion characteristics of soil of bease sub-base and sub-grade for the design of roads, pavements and runways. It meets the requirement of IS:2720(Part XVI)-1965 and consists of :
- Load frame, hand operated capacity 5000 kgs. One CBR mould 150mm x175mm high complete with base plate
- And collar 150mm dia x50mm high. One penetration piston face dia 50mm.
- Displacer Block 148mm dia x 47.7mm long, Surcharge weight 5kg and 2.5kg with central hole and also slotted.
- Perforated brass plate, with locknut stem. Tripod
- Cutting Collar.
- Rammer 4.89kg and 450m fall. Rammer 2.6kg with 310mm fall.
- Proving Ring capacity 1000kgs, 2500kgs, 3000kgs, 5000kgs.
- One dial gauge with least count, 01mm x25mm travel.