What is ductility of bitumen?

property of bitumen which allows it to undergo deformation or elongation is called ductility of bitumen. The ductility of bitumen is measured by the distance in Cm (centimeter), to which the bitumen sample will elongate before breaking when it is pulled by standard specimen at specified speed and temperature.

What is ductility value of bitumen?

The ductility value of bitumen usually varies from 5 to over 100 cm's and several standards have specified minimum ductility values for various pavement types. However a ductility value of 100 cm's is specified generally for bituminous construction.

What is ductility value?

The distance up-to breaking point in cm is the ductility value which depends on temperature, briquette dimension, pulling rate. Ductility values may range from 5 to 100 cms. A minimum of 5 cm value is required for a bitumen of grade 45 and above.

How is ductility of bitumen measured?

Ductility of a bituminous material is measured by the distance in centimeters to which it will elongate before breaking when two ends of standard briquette specimen of material are pulled apart at a specified speed and specified temperature.

What is the ductility test?

Ductility Testing. Ductility measures a specimen's ability to undergo plastic deformation prior to breaking. Results are often expressed as the percent elongation, or the percent of area reduction. In simple terms it is a measurement of how far a sample stretches before it breaks.

DUCTILITY TEST OF THE BITUMEN

What is 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 malleability and ductility?

Ductility is the property of metal associated with the ability to be stretched into wire without breaking. Malleability is the property of metal associated with the ability to be hammered into thin sheet without breaking. The external force or stress is tensile stress.

What is softening point of bitumen?

The softening point of various bitumen grades generally lies between 35°C to 70°C. Softening point of bitumen to be used for road construction at a place where the maximum temperature is 40°C should be greater than the 40°C.

How can the ductility of bitumen be increased?

And some polymers, like SBR, can be added into sulfur or PPA modified bitumen to improve the ductility and balance other important properties. Additionally, light-molecular weight oil can also be considered to added in to aforementioned modified bitumen to further increase the ductility.

What is flash and fire point of bitumen?

The rate of stirring should be approximately 60 revolutions per minute. Observe the thermometer carefully and when the temperature is 17^oC below the actual flash point (175^OC) lit up the test flame.

Is code for bitumen ductility test?

Ductility of bitumen is its property to elongate under traffic load without getting cracked in road construction works.

Is code bitumen ductility?

STANDARD • IS: 208-1978. DEFINTION • The ductility of bituminous material is the distance in centimeters to which it will elongate before breaking when a briquette specimen of the materials is pulled at a specified speed and at specified temperature.

Which is more ductile bitumen or tar?

Sol. The ductility value of bitumen is less than that of tar.

What is specific gravity of bitumen?

The specific gravity of pure bitumen is in the range of 0.97 to 1.02.

What is the meaning of bitumen grade 80 100?

Bitumen of grade 80/100 means that in the bitumen penetration test, when the needle sinks 8 to 10 mm in the bitumen, we find out that the penetration value is between 8 and 10 mm and this type of bitumen is 80/100 bitumen.

What is strain point?

The strain point is the maximum temperature at which a glass can be used for structural applications without undergoing creep. The majority of glass forming operations occur between the softening point and the working point.

What is bitumen melting point?

Bitumen has a melting point of around 240 degrees Fahrenheit which is high enough to be safely used for roadway designs and low enough to be heated up without using a large amount of energy.

What is ductility with example?

Ductility is the physical property of a material associated with the ability to be hammered thin or stretched into wire without breaking. A ductile substance can be drawn into a wire. Examples: Most metals are good examples of ductile materials, including gold, silver, copper, erbium, terbium, and samarium.

What is ductility in material?

Ductility is the ability of a material to be drawn or plastically deformed without fracture. It is therefore an indication of how 'soft' or malleable the material is.

What is malleability?

Definition of malleability

: the quality or state of being malleable: such as. a : capability of being shaped or extended by hammering, forging, etc. the malleability of tin. b : capability of being influenced or altered by external forces The malleability of memory …

What is the density of bitumen?

The density of bitumen is 1.01-1.05 g/cm 3 in the temperature range of 25°C to 85°C [63] .

What is the meaning of 60 70 bitumen?

Bitumen penetration grade 60/70 means the penetration value is in the range 60 to 70 at standard test conditions which commonly used as a Paving Grade. Bitumen is applicable for the production of hot mix asphalt for bases and pavements and for road construction.

What is VG 40 grade bitumen?

VG-40 is used in highly stressed areas such as intersections, near toll booths and truck parking lots instead of 30/40 penetration grade. Because of higher viscosity, stiffer Bitumen mixes can be produced to amend resistance to shoving and other problems related to higher temperature and heavy traffic loads.