Study of the effect of four warm mix asphalt additives on bitumen modified with 15% crumb rubber

摘要: Abstract Due to a growing concern over global warming, the bituminous mixture industry is making constant effort diminish its emissions by reducing manufacturing and installation temperatures without compromising mechanical properties of mixtures. The use mixtures with tyre rubber has demonstrated that these can be economical ecological they improve behaviour pavements. However, high content present one major drawback: require higher mixing due elevated viscosity caused thus produce larger amounts greenhouse gas than conventional This article presents study effect four viscosity-reducing additives (Sasobit®, Asphaltan A®, B® Licomont BS 100®) on bitumen modified 15% rubber. results this indicate successfully reduce viscosity, increase softening temperature penetration. do not have clear test for elastic recovery ductility at 25 °C.