The principles and benefits of B2Last® were validated in the B270 test section where it was shown that similar properties to those obtained with conventional polymer-modified binders could be achieved, while allowing for a significant temperature reduction (Warm Mix)
REACTIVE MODIFICATION WITH B2Last®
B2Last® was developed to improve the property profile of bitumen. The additive uses the process of reactive modification, which is based on the idea that bitumen has a broad spectrum of reactive groups that are available for chemical reactions and improve the network density of the resulting polymer based on bitumen constituents (Figure 1). B2Last® changes the morphology of bitumen polar moieties at a molecular level to improve its functional characteristics
Figure 1: Chemical reaction between aged bitumen from Reclaimed Asphalt Pavement (RAP), virgin material and B2Last®. Picture courtesy of BASF
BASF
RoadMat, "B2Last®: the new bitumen additive for enhanced asphalt durability", RoadMat Case Study 6, 2024, published March 22, 2023
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