In recent years it has become important to know C.B.R. Values in situ. It is useful in determining the load carrying capacity in the field when in-place density and water contents are such that the degree of saturation in 80% or greater, when material is cohensionless and coarse grained, such that it is not effected by changes is water contents and when the material has been in-place for considerable time. The loading is effected by means of a mechanical load farms which can be fixed to the under side of a truck.

 

Specifications:

 

Mechanical screw loading jack, 10,000kg. capacity with U-bracket and swivel head. Penetration piston, 50mm dia.threaded at eh upper end. Extension rods consisting of 2 lengths 5cm. 2 lengths 10cm., 1 length 30cm., 1 length 50cm., 1 length 10cm., used as spacers between the proving ring and penetration piston. The lengths are machined from steel tubing Connector set, has eight connectors for coupling the penetration piston a nd proving ring assembly either directly or through extension pieces. Dial gauge support of seamless pipe construction. It stands 30cm hig and 45cm wide at eh base. Provided with a quick release screw type-clamp capable of sliding and locking anywhere along 2 meter length of the bridge. Supplied with annular metal weight 5kg., 250mm dia. with 53mm dia. central hole, slotted metal weight 5kg., 215mm to 250mm dia. with 53mm dia. slot, 2Nos. Slotted metal weights, 10kg, 25mm to 250mm dia. with 53dia slot 2Nos.

 

Accessories:

 

Dial gauge 0.01mm x 25mm. High sensitivity Proving Ring 5000kg capacity with calibration chart and carrying case.