Hot Mix Cold-Lay of Asphalt Concrete Patching Mixtures

摘要

The investigation reported was directed to the development of a specification forhot-mix cold-lay patching materials for use in expedient pothole repairs. The results of previous FHWA investigations has shown that good performance is obtained when materials are heated and methods are applied to achieve compaction of repair materials. However, when time and/or environmental conditions do not permit these techniques, an improvement is obtained by use of polymer binders and open graded aggregates. The investigation produced a material specification for use by the districts to obtain materials for use in cold patching operations. The material utilizes an aggregate gradation very near that of the standard open graded friction coarse material. The recommended binder is the standard HFE-300S emulsion.