ASTM D 946 - 40/50, 60/70, 80/100 BS EN 12591 - 35/50, 50/70, 70/100
ASTM D3381-09 - AC10, AC20, AC30, AC40 IS 73:2013 - VG10, VG20, VG30, VG 40
PG bitumen is bitumen which is graded based on its performance at different temperatures.
Gilsonite in mass is a shiny, black substance, brittle and can be easily crushed into a dark brown powder
Cationic Rapid Setting - CRS-1, CRS-2 Cationic Medium Setting - CMS-2 Cationic Slow Setting - CSS-1, CSS-1h
Slow Curing - SC-70, SC-250, SC-800, SC-3000
Medium Curing - MC-30, MC-70, MC-250, MC-800, MC-3000
Rapid Curing - RC-70, RC-250, RC-800, RC-3000
Based on the generation source bitumen can be classified into three categories: natural, petroleum asphalts, coal tar pitches:
Based on their applications, bitumens can be divided into two groups:
About 90% of the produced bitumen is used in road construction activities and 10% of it is used for insulation applications.
The main part of bitumen is used in the road construction activities and by the municipalities for coating the streets.
Road construction bitumen is usually classified according to its penetration.
The penetration rate of bitumen material represents its strength and hardness which is defined as the number of penetration
unit (one tenth millimeter) of one vertical standard needle in one bitumen sample, in certain time and weight on the needle and
temperature. The penetration rate of bitumen is usually measured 25 degree centigrade with 100 gram weight and in 5 seconds.
Road construction bitumens made in Iran are “60 to 70” and ’85 to 100”. The numbers represent the range of bitumen penetration rate.
Bitumen is hydrocarbon substance which is black to dark brown and quite solvable in carbon sulfur.
It is solid in normal environment temperature but in increased temperature it first becomes paste and then liquid.
It has two important properties, impenetrable against water and adhesiveness which makes it an important material for application.