In no case should the temperature be raised to more than 55☌ above the expected softening point for tar, or to more than 110☌ above the expected softening point for asphalt.Heat the sample with care, stirring to prevent local overheating, until the sample has become sufficiently fluid to pour.
#Hd cleaner for asphalt extraction specific gravity plus#
Designate the mass of the pycnometer plus water as B.
Remove the pycnometer, immediately dry the top of the stopper with one stroke of a dry towel, then quickly dry the remaining outside area of the pycnometer and weigh to the nearest 0.001 g.
Any other thermometric device of equal accuracy may be used.Ĭapable of making the required measurements to an accuracy of at least 0.001g.Ħ00 mL or larger Griffin low-form beaker.įreshly boiled and cooled distilled or deionized water. The stoppered pycnometer shall have a capacity of 24 to 30 mL and shall weigh not more than 40 g.Ĭonstant-temperature, capable of maintaining the temperature within 0.1☌ of the test temperature.Ĭalibrated liquid in glass, total immersion type, of suitable range with graduations at least every 0.1☌ and a maximum scale error of 0.1☌. 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 substantially plane and have no chips, and the lower surface shall be concave 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. Glass, consisting of a cylindrical or conical vessel carefully ground to receive an accurately fitting glass stopper 22 to 26 mm in diameter. RELATIONSHIP BETWEEN TEMPERATURE AND SPECIFIC GRAVITY OF BITUMEN: Source: Construction Materials for Civil Engineers by Errol Van GRADES ACCORDING TO RELATIVE DENSITY OF BITUMEN: From Oil Refineries (this is the major source of bitumen in Pakistan).īitumen is usually characterized in the following three types of grades.Extracted from Limestone and Sandstone (procedure adopted in USA).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.īitumen is generally obtained from the following three sources 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.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.This test method covers the determination of the relative density and density of semi-solid bituminous materials, asphalt cements, and soft tar pitches by use of a pycnometer. SPECIFIC GRAVITY TEST ON BITUMINOUS MATERIALS
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