BP Bitumen

Description

Bitumen, also known as asphalt, is the sticky, black and highly viscous liquid or semi-solid obtained naturally or as a residue from petroleum distillation.

Applications

BP has many years of experience in the research, development and formulation of a wide range of advanced bitumen products, designed for a significant spectrum of applications — from light industrial uses to the most challenging highway environments.

Applications

BP has many years of experience in the research, development and formulation of a wide range of advanced bitumen products, designed for a significant spectrum of applications — from light industrial uses to the most challenging highway environments.

BP Bitumen range

Penetration grades

These grades are straight run bitumen classified according to their hardness, and are designated by their penetration limits at 25°C in tenths of a millimetre, with the exception of grade 65/13 (designated by the mid-values of the softening point and the penetration respectively). 

The grades with penetrations greater than 40 are mostly used in road construction and occasionally in industrial applications. The grades with penetrations less than 40 are used exclusively in industrial applications. 

BP Penetration Grades 35/50, 50/70, 70/10 and 150/200 hold the South African SABS 307 mark, and are available from BP’s refinery in Durban, South Africa.

Cutback grades

These are penetration grades blended with a volatile diluent which evaporates when applied. They are classified according to their viscosity and are designated by the prefixes RC or MC (denoting the rate of curing, i.e. RC for rapid curing and MC for medium curing) and the lower limit of the viscosity range at 60°C in cSt. The higher limit of the viscosity range is twice that of the lower limit. These grades are mostly used for road construction and paving. 

BP Cutback Grades hold the South African SABS 308 mark, and are available from BP’s refinery in Durban, South Africa.

Oxidised grades

These grades have a high temperature softening point and a low ductility and are obtained by blowing air through straight run bitumen. They are designated by the prefix R and their mid-values of the softening point in °C, and the penetration limits at 25°C in tenths of a millimetre respectively. These grades are used in industrial applications. 

BP Oxidised Grades comply with the South African SABS 317 mark.

Hard grades

These grades have a penetration less than 12 and are designated by the prefix H and the softening point limits in °C. They have industrial applications only, and are available ex-import on firm order only.

Special grades

BP Pipe Primer and BP Bitumen Solution are special grades consisting of bitumen blended with a volatile diluent which evaporates when applied. The minimum flash point is 35°C (IP70). BP Pipe Primer contains around 40% of the oxidised grade R85/25. The viscosity at 25°C is approximately 40cSt - well suited to dip or spray application at ambient temperature. 

Oxidised Grades are known to be more resistant to chemical attack than Petroleum Grades and, as such, BP Pipe Primer is better suited than BP Bitumen Solution for general corrosion protection. It is also used as a general purpose primer for hot-applied oxidised grade bitumen. 

BP Bitumen Solution contains around 70% of the penetration grade 65/13. The viscosity at 25°C is approximately 950cSt, making it suitable for brush application. It is used as a general purpose primer for hot-applied penetration grade bitumen. 

Both products are available from BP’s refinery in Durban, South Africa.