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Bitumen Testing Instruments

BITU 211
Standard Penetrometer
Used to determine grade of bitumen. The penetration tests determine consistency of bitumen for the purpose of grading. Depth in units 1/10 of millimeter to which a standard needle having a standard weight will penetrate vertically in a duration of five seconds at a temperature of 25ēC determines penetration for gradation.
It consists of a vertical pillar mounted on a base provided with levelling screws. The head, together with dial plunger rod and cone (or needle) slides on a pillar and can be clamped at any desired height. A rack & pinion and pointer assemble provides fine adjustment of needle or cone tip to sample. It incorporates a clutch mechanism which makes reading of penetration and subsequent resetting a simple and accurate operation. The dial is graduated in 400 1/10 and the millimeter sub-divisions and the needle pointer against figures makes easy reading. Supplied with bitumen penetration needle, ring weight one each 50 gms, and two sample container.
Accessories : Penetration cone for empirical estimation of penetration of lubricating grease, petroleum jelly etc.
BITU 212
Standard Penetrometer (Automatic)
Same as mechanical standard penetrometer but supplied with transistorized timer and Electro magnet incorporated in the clutch mechanism to accurately control penetration time to exact five seconds.
BITU 213
Stripping Value Apparatus
For determining Stripping Value of bitumenous mixes having aggregate size 1.0mm to 75 microns.
A circular tray rotates in a vertical plane at a rate of approximately 100 r.p.m. by an eletrical geared motor. 4 bottles of approximately 400 cc are mounted on this circular tray at an angle of 90° to each other with their mouths towards centre of the tray.A time switch is provided. Suitable for operation on volts A.C. single phase.

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