Performance Grade (PG) bitumen is bitumen which is graded based on its performance at different temperatures. The LTPP has given certain algorithm to calculate the temperature of the pavement based on the temperature of the air above. From this, the highest and the lowest temperatures of the pavement is calculated and the bitumen that performs well in that temperature range is selected.

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Bitumen emulsion consists of three basic ingredients: bitumen, water, and an emulsifying agent. Based on specifications it may contain other additives, such as stabilizers, coating improvers, anti-strips, or break control agents. It is well known that water and asphalt will not mix, except under carefully controlled conditions using highly specialized equipment and chemical additives.

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Class 170 is widely used in sprayed sealing and light asphalt applications to provide durability and fatigue resistance. It is also used to manufacture cutback bitumen, bitumen emulsions and modified bitumen. Class 320 is most commonly used to manufacture asphalt mixes while Class 600 is primarily used to manufacture extra heavy-duty asphalt pavements that need to endure substantial traffic loadings.

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Cutback Bitumen ( Liquid  Bitumen ) is Bitumen that is dissolved in a solvent . Typical solvents include Naptha, gasoline and kerosene, white spirit etc. The type of solvent controls the curing time  while the amount determines  the viscosity of the Cutback Bitumen.

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Standard Viscosity Grade Bitumen Binders include:

• Viscosity Grade Bitumen AC-2.5
• Viscosity Grade Bitumen AC-5

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This product is guaranteed to meet:Federal specification SS-A-706C for Type 1 60-70 Petroleum Asphalt. American. Association of state Highway and Transportation Officials (AASHTO) M20-70 (1982) for 60-70 Penetration Graded Asphalt Cement. ASTM D 946 for 60-70 Penetration Grade Asphalt Cement.

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