California Bearing Radio Test Apparatus Motorized As Per Is : 2720 (Partxvi)
The CBR test is used for determining the relative bearing ratio and expansion characteristics under known surcharge weight of base, sub base & subgrade soils for the design of roads, pavements and runways.
Specification : the apparatus consists of :
Load frame load frame motorized capacity 50kn (5000kgf) having three rates of starins I. E. 1. 25, 1. 5, 2. 5mm/minutes. It consists of a screw jack with detachable handle. The lower pattern moves up & down. The top braket is adjustable for vertical clearence and has an adaptor for connecting standard providing rings. A dial gauge mounting bracket is provided on one of the two pillers. Suitable operation on 220volts, 50 hz, single phase ac supply.
* CBR mould made of m. S. 150mm, i. D. X 175mm high with extension coller 150mm I. D. X 50mm high.
* perforated bse plate for the above mentioned mould made of gunmetal.
* penetration piston having 50mm face dia.
* adjustable bracket for penetration dial gauge.
* circular metal spacer disc with detachable handle 148mm dia x 47. 7mm high.
* annular metal weight 2. 5 kg, 147mm dia with 53mm dia. Central hole.
* slotted metal weight 2. 5kg, 147mm dia with 53mm dia slot.
* perforated plate 148mm dia. With adjustable stem and lock nut.
* metal tripod made of c. I. For dial gauge.
* cutting coller.
* rammer 2. 6kg x 310mm controlled fall.
* rammer 4. 89kg x 450mm controlled fall.
* providing ring capacity 50 kn, fitted with dial gauge 25 mm travel, & 0. 01mm least count with or without rtc calibration certificate.
* dial gauge 25mm travel & 0. 01mm least count.
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