Is code for specific gravity test of bitumen?
IS: 1202 – 1978
This test is done to determine the specific gravity of semi-solid bitumen road tars, creosote and anthracene oil as per IS: 1202 – 1978.
How do we measure the viscosity of bitumen?
Saybolt Furol viscosity test is used to determine viscosity of liquid bitumens. In this test, time in seconds is noted for 60 ml of the liquid bitumen at specified temperature to flow through an orifice of a specific size. The higher the viscosity of the bitumen more time will be required for a quantity to flow out.
What is softening point test of bitumen?
Softening point test of bitumen is done to determine the consistency of bitumen. This test gives an idea of the temperature at which the bitumen attains certain viscosity.
Is code for viscosity test of bitumen?
VISCOSITY TEST OF BITUMEN (IS 1206-PART-2)
What is the range of viscosity of bitumen?
The standard penetration value of bitumen viscosity grade VG-20 is 60 mm at 25 °C. The absolute viscosity of VG-20 bitumen is 1600 to 2400 poise at 60 °C.
What is the unit of softening point?
The softening point is reported as the mean of the temperatures at which the two disks soften enough to allow each ball, enveloped in bitumen, to fall a distance of 25 mm (1.0 in.).
What is the range of softening point of bitumen?
The softening point value of the two readings should not exceed 1.0 °C for the softening point of bitumen range 40-60 °C and 1.5 °C for the softening point between 61-80 °C.
What is DBM and BM?
Bituminous Macadam (BM) The BM mix is open graded and highly permeable in nature. This is a recipe type mix produced that gain no kind of quality in terms of strength and volumetric. The void content is 20 to 25% higher than the dense graded bitumen (DBM). The DBM have a void content of 3 to 5%.
How do you test a softening point?
The softening point value of the two readings should not exceed 1.0 °C for the softening point of bitumen range 40-60 °C and 1.5 °C for the softening point between 61-80 °C. Else the test is considered invalid and it is repeated….Result.
| Paving Grades | Softening Point |
|---|---|
| VG 30 | 47 °C |
| VG 40 | 50 °C |
Where VG 40 bitumen is used?
VG-40 BITUMEN: VG-40 is used in highly stressed areas such as intersections, near toll booths and truck parking lots in lieu of old 30/40 Penetration grade.