Penetration Grade Bitumen is a standard bitumen usually used as a Paving Grade Bitumen essential for road construction and for the production of asphalt pavements with superior properties, and it’s very important once it bounds the aggregates and creates a unique cohesion and stability to the bituminous mix.
Ziggurat Oil Supplies Penetration Graded Bitumen Grades in correspondence to ASTM D946-09 including:
ASTM D946-09 Grades:
Viscosity Grade Bitumen (Asphalt) is a standard grade Bitumen usually used as a Paving Grade Bitumen suitable for road construction and for the production of asphalt pavements with superior properties. This grade of Bitumen is mainly used in the manufacture of hot mix asphalt for bases and wearing courses.
There are two methods of grading:
- Standard Viscosity Grade Bitumen (AC-Grades), in which the Viscosity of the standard bitumen (asphalt) is measured at 60 ºC (140 ºF).
- RTFOT Viscosity Grade Bitumen (AR-Grades), in which the Viscosity of bitumen (asphalt) is measured at 60 °C (140 °F) after the roll on thin film oven test.
Performance Grade Bitumen, The Superpave Binder specification and the supporting test procedures are products of the Strategic Highway Research Program (SHRP), a 5-year research effort (1987 to 1992) which targeted $50 million for asphalt research.
PG system is based on project climate. The standard notation for PG binder is PG XX-YY where XX is the average-seven-day maximum pavement design temperature and YY is the minimum pavement design temperature
Bitumen emulsions are two-phased systems consisting of bitumen, water, and one or more additives to assist in formation and stabilization and to modify the properties of the emulsion.
Bitumen emulsions can be divided into four classes. The first two are, by far, the most widely used:
· Cationic emulsions
· Anionic emulsions
· Non-ionic emulsions
· Clay-stabilized emulsions
Cutback Bitumen (Liquid Bitumen) is Bitumen that is dissolved in a solvent. Typical solvents include Naphtha, gasoline and kerosene, white spirit etc. The type of solvent controls the curing time while the amount determines the viscosity of the Cutback Bitumen.
Cutbacks are divided into three classifications:
Oxidized bitumen is mainly used for industrial purposes, such as roof insulation, flooring, industrial mastics, pipe coating, and paints. Oxidized bitumen is categorized based on softening points and penetration rate. For example, oxidized bitumen 85/40 is a type of bitumen whose softening point is 85±5 degrees Centigrade and its penetration rate is 40±5 dmm.
CRMB is a high performance Crumb Rubber Modified Bitumen manufactured using finely powdered scrap tyre rubber and processed in a sophisticated reactor at high temperatures. Complex processing modifies the properties of Bitumen and imparts additional strength, elasticity and other beneficial properties to make it better able to withstand high traffic loads, extreme weather conditions and other forms of stress. Use of CRMB leads to excellent pavement life, driving comfort and low maintenance