Selected papers from sessions of the Eighth International Conference on Case Histories in Geotechnical Engineering, held in Philadelphia, Pennsylvania, March 24-27, 2019. Sponsored by the Geo-Institute of ASCE.

This Geotechnical Special Publication contains 37 peer-reviewed papers on soil improvement and stabilization.

Topics include: characteristics, use, and assessment of biopolymers; MICP treated soils; and performance of fiber reinforcement for soil stabilization.

GSP 309 will provide the latest information to practitioners and researchers in the area of soil improvement.