Route I-44, Phelps County – Construction Phase Report Author(s): Webb, Mark Origin: Missouri Date: January, 1994 Categories: Performance Key Words: Ground rubber Summary: Four test sections including type I polymer (SBS), type II polymer (SBR), type II or II ground rubber (course), and type four ground rubber (fine). Wet process was used for the asphalt-rubber sections. A section of type IC asphaltic concrete was also placed. Sections were 1 ¾ inches thick. The contractor provided mix designs. No construction problems were encountered with any of the test materials. Costs of each mix type, mix designs, results of a rolling wheel laboratory test, and other test data are included.