Field and Laboratory Assessment of Flowable Fill Performance in South Carolina

This report summarizes the experimental field and laboratory investigation conducted on the placement and performance of South Carolina Department of Transportation (SCDOT)-specified controlled low-strength material (CLSM) mixtures. Visual observation and quantitative assessment of CLSM at five bridge sites and one demonstration site in two engineering districts were conducted. This field study was followed up with an extensive, two-phase laboratory study to measure fluid and hardened-state properties. The effects of water content and sand source on properties were investigated as part of this study. Based on experimental findings, recommendations are suggested to implement field-testing procedures and to further monitor CLSM in the field.