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The text of this report is reproduced by the National Environmental Research Center - Cincinnati in the form received from the Grantee; new preliminary pages have been supplied. The National Environmental Research Centers provide this multidisciplinary focus through programs engaged in o studies on the effects of environmental contaminants on man and the biosphere, and o a search for ways to prevent contamin- ation and to recycle valuable resources.
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The study described here was undertaken to demonstrate the feasibility of using rubber from discarded passenger car tires in emulsions as blacktop dressings for driveways.
Employing rubber in this manner could increase the demand for used tires and decrease their solid waste disposal problem. Breidenbach, Ph. The use of rubber in this large volume market could result in an increased demand for the used tires, and, thus, decrease the solid waste disposal problems connected with million dis- carded tires per year. The study has resulted in the production of nine different com- positions containing from 5 to 25 percent rubber that were promising enough to apply to a high-traffic area in the BCL parking lot estimated passage of cars per day , to determine the respective service lives of the composi- tions.
After exposure for one year under the above conditions, performance appears to have been as good as that of the control samples, and protection of the underlying blacktop is still being rendered by all samples. The goal of the project was the demonstration of the feasibility of the basic idea that rubber salvaged from discarded auto tires could be incorporated into water-thinned blacktop dressings, and to utilize the in- formation obtained to generate interests of industrial companies continuing the studies to result in marketable products.
