Crushed Tires Improve Maine Roads, Reducing Mud and Ice

Maine researchers have found a novel way to tackle winter road problems by incorporating crushed tires into roadbeds. The innovative approach aims to mitigate the formation of mud and ice, a persistent challenge during the state’s harsh winters.

Tire Recycling and Drainage Enhancement

Engineers at the University of Maine, led by Dana Humphrey, experimented with layering crushed tire fragments – roughly 5-7.5 cm in size – within gravel roads prone to freezing and subsequent mud build-up. The tires were spread across 183 meters of road and covered with two additional layers of gravel, totaling a 30 cm depth.

Sensor Data Reveals Positive Results

The project utilized 100 sensors to monitor temperature fluctuations and mud accumulation within the treated sections. The results demonstrated that the tire layer, lighter than traditional gravel, reduced ground pressure. Furthermore, the irregular shape of the tire fragments created drainage gaps, lessening mud formation after the thaw.

Addressing Maine’s Tire Waste

This initiative addresses Maine’s significant tire waste problem, with the state discarding approximately 1.2 million used tires annually. By incorporating these tires into road construction, the state is simultaneously improving road infrastructure and promoting sustainable tire recycling. The experiment offers a practical solution for managing winter road maintenance and reducing the impact of severe weather conditions.