It may be defined as the hardness softness of the bitumen by measuring the depth in tenth of a millimeter to which standard loaded needle will penetrate vertically in five minutes the penetration of bituminous material is the distance in tenth of a millimetre that a standard needle will penetrate vertically into a sample of the material under standard conditions of temperature load and time.
- Temperature 250oC
- Penetrometer apparatus with containers and weights having penetration needle (Bitumen)
- Penetrometer apparatus with containers and weights having penetration CONE HOLLOW type (Grease)
- Same as above but with Geared arrangement for moving the arm with geared unit
- Penetrometer with Brass Cone & Needle with DIGITAL TIMER DEVICE (Adjustable)
- Water Bath, A bath having a capacity of at least 10 Liter and capable of maintaining a temperature of 25 ± 0.1oC or other temperature of test within 0.1oC
- Timing Device for hand operated Penetrometer any convenient timing device such as an electric timer, a stop watch, or other spring activated device may be used provided it is graduated in 0.1 second or less and is accurate to within ± 0.1 second for a 60 second interval
- Thermometers Calibrated liquid-in-glass thermometers of suitable range with subdivisions and maximum scale error of 0.1oC or any other thermometric device of equal accuracy, precision and sensitivity shall be used
- It is cooled at an atmospheric temperature of 15 to 30oC for 2 1 hrs. Then it is placed in a transfer dish in the water bath at 25.0 + 0.1oC for 2 1
- It is poured into a container to a depth of at least 15mm in excess of the expected penetration
- The bitumen above the softening point (between 75 and 100oC) is softened it is stirred thoroughly to remove air bubbles and water.
- Water bath
- Transfer dish
- Time device
- Spare Penetration Needle (Pack of two)
- Spare Penetration solid cone
- Spare Penetration brass hollow cone
- Grease worker hand operated
- Grease worker hand operated big handle (Lever type)
- Grease cutter
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