The ring and ball method of test for softening point of bituminous. Astm d36 test method for softening point of bitumen. The softening point is the temperature at which a material softens beyond some arbitrary softness. Ring and ball test is used to determine the softening point of bitumen, asphalt and coal tar. Bitumens are viscoelastic materials without sharply defined melting points. This test is done to determine the softening point of asphaltic bitumen and fluxed native asphalt, road tar, coal tar pitch and blown type bitumen as per is. The softening point is defined as the mean of the temperatures at which the bitumen disks soften and sag downwards a distance of 25 mm under the weight of a steel ball. This test consists of two brass ring and two steel ball, using which the. The softening point sp and penetration index pi of bitumen from parts of southwestern nigeria are important properties needed for better design and optimization of the upgrading process of. The principle behind this test is that softening point is the temperature at which the substance attains a particular degree of softening under specified condition of the test. Determining softening point of bitumen civil engineering. Ring and ball apparatus, steel balls brass rings ball guide support thermometer bath with stirrer scope softening point test of bitumen as per is.
Automatic ring and ball apparatus, bitumen testing. The softening point is taken by two suitably positioned light barriers and the temperature is measured by a pt100 sensor placed in a central position. The softening point of materials which, like asphalt, have no definite melting point, but which when heated gradually change from brittle or very thick. Automatic ring and ball apparatus, bitumen testing equipment. Ringball test for softening point of bitumen, asphalt and coal tar. Rating is available when the video has been rented. Pdf softening point and penetration index of bitumen. Live bitumen extraction test for dense bituminous macadam pwd road construction civil engineering. Ringball test for softening point of bitumen, asphalt and. This test consists of two brass ring and two steel ball, using which the softening point of various bituminous materials are determined.
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