Sustainable road construction with B2Last^®

You are looking for both a sustainable and high performing bitumen additive? BASF developed an intelligent and innovative bitumen modification that helps you to significantly reduce CO₂ and bitumen emissions and makes roads more durable.

Be it an increasing heavy load traffic or more extreme weather conditions because of climate change - today, roads and streets must fulfill different requirements. Additives for bitumen play a decisive role in the durability of asphalt. At the same time, occupational health and safety, environmental protection and the reduction of CO₂ emissions are of high importance for road construction.

With B2Last^®, BASF has developed an innovative bitumen additive that combines both asphalt performance and sustainability: temperature-reduced paving with a high recycled asphalt content and good workability, significantly lower bitumen and CO₂ emissions and longer lasting roads. B2Last^® is the bitumen additive for sustainable road construction.

• Fast & easy asphalt modification directly at mix plant.
• Saves bitumen silo capacity
• Lower storage temperature for bitumen possible
• Easy product storage and dosage

• Only 2-3 % additive needed
• High flexibility - asphalt performance on demand
• Simple adjustment of performance by additive amount
• Plant capacity is maintained

• Enables 30-40°C lower asphalt laydown temperatures
• Makes work safer - up to 65 % less bitumen emissions
• Allows high recycled asphalt contents
  and maintains excellent workability

• Reduces CO₂ emissions along whole process chain
• Superior rutting behavior and fatigue resistance across broad temperature range
• Makes roads last longer

Environment Health and Safety

Bitumen aerosols and vapors (bitumen emissions) 
B2Last^® enables asphalt mix production and laydown temperatures below 140 °C (warm mix asphalt) and thereby reduces bitumen aerosols and vapors by up to 65% (depending on measuring point) – for workers walking beside the paver the occupational exposure limit of 1.5 mg/m³ can be fulfilled.

Product Safety
We value the health and safety of people above all else – introduction to product handling and emission monitoring with customers at every plant trial. Several large scale paving trials and more than 12 km paved roads confirm: B2Last^®-related emission levels are far below occupational exposure limits.

How B2Last^® works

B2Last^® crosslinks bitumen components to form a polymeric network. It makes asphalt stiffer and thereby boosts the rutting and fatigue behavior at high service temperatures. In addition, the formed polymeric network provides enough elasticity to deliver excellent crack resistance at low service temperatures.

Our know-how and services for you

As a leading chemical company, BASF has the expertise and experience to improve the quality and processing of bitumen and asphalt in a unique, innovative and customer-oriented way. 

Succesful pilot

The new additive has already been tested under real life conditions: over 12 kilometers of public road have been paved in Bavaria and North Rhine-Westphalia in Germany and Kentucky in the United States. The modified asphalt has displayed excellent characteristics during both mixing and application.