CBR

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CBR tests “in situ”
Standards ASTM D4429; BS 1377
The use of the CBR “in-situ” equipment in road construction allows fast and effi cient determination of soil load capacity.

The equipment consists of:
S0397 Mechanical shaft, 50 kN, complete with a load application crank.
V0007 Dynamometric ring, 50 kN
S0352 CBR penetration piston
S0394 Set of extensions, consisting of:
• 51 mm long extension (2)
• 152 mm long extension (1)
• 254 mm long extension (1)
• 356 mm long extension (1)
• 457 mm long extension (1)
• 610 mm long extension (1)
S0395 Support beam, 1.20 m long
V0030 Adjustable magnetic stand.
V0017 Dial gauge, 30 x 0.01 mm stroke
S0398 Carrying case.

Conversion frame for the CBR test in a laboratory

Standards ASTM D1883; AASHTO T193; BS1377,1924; LCPC
Consisting of a sturdy steel frame on which is installed the mechanical shaft, the dynamometric ring and penetration piston.
This permits the operator to perform the CBR test manually, with the sample in its own mould. Supplied with:
– Test Frame
– Hand-operated mechanical jack.
– 2 kN dynamometric ring
– Compression plates.
– Dial gauge, 10 x 0.01 mm
– Dial gauge stand
Dimensions: 380 x 460 x 1380 mm
Weight: 70 Kg

Impact test method

Used to obtain an indication of the degree of terrain compaction. The results can be directly linked to the results of the CBR test. The equipment consists of a hammer weighing 4.5 – 2.5 or 0.5 Kg, depending on the type of soil, to which is attached an accelerometer whose signal is viewed on a digital display.

S0400 Electronic compaction measuring device. As described, with a hammer weighing 4.5 Kg
Dimensions: 140 x 140 x 700 mm
S0401 Electronic compaction measuring device. As described, with a hammer weighing 2.5 Kg
Dimensions: 140 x 140 x 700 mm
S0402 Electronic compaction measuring device. As described, with a hammer weighing 0.5 Kg
Dimensions: 140 x 140 x 700 mm