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Rings and Balls Apparatus (Softening point test of Bitumen)

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Softening point of Bitumen: It is the minimum temperature at which bitumen get soft.
It is important to find the softening point of Bitumen because bitumen can be easily applied on the road surface when it is soft and we have to use the fuel and fire to soften the available bitumen. Softening point tells us about the amount of fuel/energy that will be needed to soft it before applying on the road surface. Softening point of bitumen must not be below the average day temperature and it should also not be very much higher, because that will require much energy and fuel to soft it before applying on the road.
Aim: To find out the softening point of the given bitumen sample.Apparatus: Rings and Balls ApparatusHeating arrangementThermometer.
Ring and Balls apparatus contain metallic rings and steel balls and a base metallic plate, encased inside a jar. This whole arrangement is immersed in the water inside the jar, so as to gradually and uniformly raise the temperature by heating with the he…