Hardness tester for Mastic Asphalt has been fabricated to meet the essential requirements od IS 1195 - 1968 in finding out the Hardness Number of mastic asphalt.
SPECIFICATION
Hardness Number is defined as the figure denoting the depth in hundreds of a centimeter, to which a flat ended identation pin in the form of a steel rod 6.35 mm in diameter will penetrate the mastic under a load of 31.7 kg applied for 60 seconds, the temperature being maintained at 35' +/- 0.5' C or 45' +/- 0.5' C.
The load transfer bar passes through the support bracket and rest on the specimen .
The penetration load can be adjusted and locked before the test is conducted .