The effect of liquid antistrip additives on the properties of polymer-modified asphalt binders and mixtures as related to rutting and moisture damage was investigated. The use of polymer-modified asphalts has increased in recent years because of their ability to resist rutting at high temperatures and improve fatigue resistance at low temperatures. In the Houston area liquid antistrip additives are used for almost all the mixtures to mitigate moisture damage. Liquid antistrip additives have been shown to soften certain asphalts. Whether liquid antistrip additives soften polymer-modified asphalts, thus degrading the rut resistant capability of polymer-modified asphalt, has become a concern to highway engineers. Asphalt binder properties known to have a bearing on rutting were evaluated on polymer-modified asphalts with three commercial liquid antistrip additives. Moisture damage of the mixture was evaluated using the conditioned-unconditioned indirect tensile test.
|Number of pages||7|
|Journal||Transportation Research Record|
|State||Published - Oct 1994|