Malang, Indonesia – Scientists at Negeri Malang University in Indonesia have looked at the effect of adding polyurethane to the asphalt concrete wearing course to road damage. Modified asphalt is one potential solution for preventing wear to roads.
Samples were prepared with a PU content of 0–4% by weight of asphalt, and subjected to Marshall parameter analysis, which measures the stability of the surface to damage such as distortion, displacement, rutting and shearing stresses.
They found that asphalt modified with polyurethane could improve the performance of the asphalt concrete waring course in terms of stability, flow, void in the mixture, void in mineral aggregate and void filled with asphalt. The optimal PU loading to increase Marshall stability was 2%, while loadings above 3% were not recommended.
The work has been published in the Journal of Physics Conference Series.