Asphalt Rubber: A Summary of the Use of Crumb Rubber in Hot Mixes: KansasExperience 1990-2000

摘要

From 1990 to 1995 a total of 13 projects were constructed using crumb tirerubber. These projects were built in responses to a legislature request to evaluate the feasibility of the use of crumb tire rubber in highway construction. Six projects were changed ordered and seven were administrated through normal bid procedures. The high-density mixes, recycle mixes, and the open graded mixes were employed in the experiment. Five were the modified dry process and eight were of the wet process. A total of approximately 2637 tons of crumb tire rubber were used in all of the 13 projects. A rating system was established to evaluate the effectiveness of each project. Almost all of the crumb tire rubber came from outside of the state and very little was used from Kansas generated sources. The report concluded that the use of crumb tire rubber in hot mix asphalt was possible but not economically feasible. Therefore, if the use of crumb tire rubber is mandated in the state of Kansas, it is recommended that another use be tried such as asphalt-rubber seals or burning the tires as a fuel source.