![]() I)- In no case should the temperature be raised to more than 56 ☌ above the expected softening point for tar, or to more than 111☌ above the expected softening point for asphalt. While heating, keep in mind the following considerations Distilled water - freshly boiled and cooled distilled water shall he used to fill the Pycnometer and the beakerġ- Heat the sample with care, stirring to prevent local overheating until the sample has become sufficiently fluid to pour.Balance - a balance conforming to the requirements of AASHTO.Thermometers - calibrated liquid-in-glass, total immersion type, of suitable range.Water bath, constant-temperature, capable of maintaining the temperature within 0.1 ☌ of the test temperature.The stopper Pycnometer shall have a capacity of 24 to 30 ml, and shall weigh not more than 40 gram. The height of the concave section shall be 4.0 to 18.0 mm at the center. The top surface of the stopper shall be smooth and substantially plane and the lower surface shall be concave in order to allow all air to escape through the bore. The stopper shall be provided with a hole 1.0 to 2.0 mm in diameter, centrally located in reference to the vertical axis. Pycnometer - glass, consisting of a cylindrical or conical vessel carefully ground to receive an accurately fitting glass stopper 22 to 26 mm in diameter.Thus it is possible for a quantitative extraction of mineral impurity in bitumen. In case bitumen contains mineral impurities the specific gravity will be higher.Bitumen binder has specific gravity in the range of 0.97 to 1.02.Specific gravity is also used in identifying the source of bitumen binder.Bitumen weights sometimes have to be converted into volumes for asphalt concrete mix design calculations for which a knowledge of specific gravity is essential. ![]() Specific gravity of a bitumen binder is a fundamental property frequently required as an aid in classing binders for use in paving jobs.The specific gravity of semi-solid bituminous material, asphalt cements, and soft tar pitches shall be expressed as the ratio of the mass of a given volume of the material at 25 ☌ to that of an equal volume of water at the same temperature. SPECIFIC GRAVITY Specific Gravity of Bitumen 9 SPECIFIC GRAVITY TEST ON BITUMINOUS MATERIALS. Specific Gravity of Bitumen EXPERIMENT NO. ![]()
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