Low-Cost Rural Surface Alternatives: Literature Review and Recommendations, Tech Transfer Summary.

摘要

A detailed literature survey was conducted on the topic of unbound granular road performance and construction with respect to freeze-thaw damage and resistance. Figure 1 shows typical Iowa gravel roadway conditions during the spring thaw period. Improvements to reduce rutting due to thaw weakening and preventing frost heave are desired. In this document and the accompanying report, engineering recommendations are provided for (1) collecting local information to better characterize the extent of the problem and (2) constructing test sections to evaluate freeze-thaw mitigation technologies at full-scale.