![]() Tire crumb rubber from recycled tires is widely used as infill material in synthetic turf fields in the United States. Concerns have been raised about the safety of this material and a multi-agency Federal Research Action Plan on Recycled Tire Crumb Used on Playing Field.Ĭhemical and Physical Analysis Methods for Characterizing Tire Crumb Rubber Used in Synthetic Turf Fields Recycled tire crumb rubber (TCR) is often used as infill material in synthetic turf playing fields as well as some playgrounds. Concerns.Ĭharacterization of Semi-Volatile Organic Chemicals from Tire Crumb Rubber use tire crumb rubber infill alone or mixed with sand or alternative materials. An estimated 95% of the over 12,000 installed fields in the U.S. Tire crumb rubber derived from recycled tires is widely used as infill material in synthetic turf fields in the United States. For this to be a viable application, the total zinc in the stormwater discharge must be below the EPA’s benchmark value of 0.117 mg/L.Ĭharacterizing Tire Crumb Rubber for Exposure Assessment One potential application for recycled tires is replacing sand with tire crumb rubber in granular media filters used for stormwater pollution control. ![]() Agricultural Research Service software HYDRUS-1D, in order to determine the circumstances when zinc leaching from tire crumb rubber would be expected to comply with the applicable discharge limits. Results are interpreted with a first-order kinetic attachment/detachment model, implemented with the U.S. Environmental Protection Agency’s (EPA’s) Synthetic Precipitation Leaching Procedure, batch leaching tests, and column leaching tests performed to quantify the process by which zinc leaches from tire crumb rubber into water. ![]() This study will report results from the U.S. Zinc is generally used in tire manufacturing, representing approximately 1.3% of the final product by mass. A review of the literature indicates that leaching of zinc from tire crumb rubber is the most significant water quality concern associated with using this material. However, the use of tire crumb rubber may have negative environmental impacts, especially when the rubber comes into contact with water. ![]() Various engineering applications utilize recycled tires in the form of shredded tire crumb rubber. Recent estimates indicate that more than 2 billion scrap tires are currently stockpiled in the United States and approximately 280 million more tires are added annually. ![]()
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