Viscosity Grade

Viscosity Grade Bitumen is mostly used as a Paving Grade and it’s suitable for Road Construction and for the Asphalt pavements producing with premier attributes. Viscosity Grade Bitumen is usually used in the production of Hot Mix Asphalt.

Viscosity Grade Bitumen has a thermoplastic feature which causes the material to Soften at High temperatures and to Harden at Lower temperatures. This temperature viscosity relevance is significant when specifying the performance parameters such as the adhesion, rheology, durability, and application temperatures of bitumen. In the Viscosity Grade Bitumen Specifications, the most important emphasis is based on the Bitumen ductility.

Gemini International. co has the capability to Export and Supply the Viscosity Grades Bitumen in compliance with National and International standards.

Viscosity Grade Bitumen

Specification of Viscosity Grade Bitumen VG 10

Specification	Acceptable Range	Result	Test Method	Explanation
Absolute Viscosity	Min 800	1164	ASTM – D4402	at 60°c , Poises
Kinematic Viscosity	Min 250	287	ASTM – D4402	at 135°c , c.st
Ductility	Min100	>100	ASTM – D113	at 25°c , cm
Solubility	99.0 Min	99.8	ASTM – D2042	in CCL4 , %
Specific Gravity	1.01-1.06	1.01	ASTM – D70	at 25°c
Spot Test	Negative	Negative	T102	in Naphtha
Flash point	220 Min	334	ASTM – D92	°c
Penetration	80-100	91	ASTM – D5	at 25°c , mm/10
Softening Point	Min 40	45.2	ASTM – D36	°c

Specification of Viscosity Grade Bitumen VG 30

Characteristics	Unit	VG 30	Test Method
Absolute Viscosity @ 60 °C, Poises	°C	Min.2400	IS 1206 (Part 2)
Kinematic Viscosity @ 135 °C	cSt	Min.350	IS 1206 (Part 3)
Softening Point (R&B)	°C	Min.47	IS 1205
Flash Point (Cleveland Open Cup).	°C	Min.220	IS 1209
Solubility in trichloroethylene.	%	Min.99	IS 1206
Penetration @ 25 °C (100 grams, 5 seconds)	0.1	50-70	IS 1203
Penetration @ 25 °C (100 grams, 5 seconds)	mm	50-70	IS 1203
Test on residue from thin film oven tests/RTFOT
i) Viscosity ratio @ 60 °C	°C	Max. 4.0	IS 1206 (Part 2)
ii) Ductility @ 25 °C, (Thin film oven test).	Cm	Min.40	IS 1208
Specification Gravity @ 27/27	°C	Min.0.99	IS 1202
Conforms to BIS (IS 73:2006) Specifications

Specification of Viscosity Grade Bitumen VG 40

Specification	Acceptable Range	Result	Test Method	Explanation
Absolute Viscosity	Min 3200	3912	ASTM – D4402	at 60°c , Poises
Kinematic Viscosity	Min 400	426	ASTM – D4402	at 135°c , c.st
Ductility	Min100	>100	ASTM – D113	at 25°c , cm
Solubility	99.0 Min	99.87	ASTM – D2042	in CCL4 , %
Specific Gravity	1.01-1.06	1.028	ASTM – D70	at 25°c
Spot Test	Negative	Negative	T102	in Naphtha
Flash point	220 Min	344	ASTM – D92	°c
Penetration	40-60	47	ASTM – D5	at 25°c , mm/10
Softening Point	Min 50	53.6	ASTM – D36	°c

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