Preliminary Results from a Continuous Compaction Control Data Set Recorded during Active Earthwork Construction

摘要

The Delaware Department of Transportation (DelDOT) has acquired a CCS900 compaction monitoring system that allows for collection of continuous compaction control (CCC) data. CCC equipment allows contractors to collect near continuous compaction effort data during the compaction of soils. This is advantageous to the earthwork QC/QA process, as CCC data can be collected over nearly 100% of the evaluation area relative to traditional in place "spot" testing, which typically results in less than 1% of the evaluation area being tested. This study investigated the findings from preliminary data collection during active earthwork construction utilizing a compaction roller installed with a CCS900 system that collected two types of CCC readings, compactometer value (CMV), and machine drive power (MDP). Stiffness based in situ measurements, including those taken from a dynamic cone penetrometer (DCP) and light weight deflectometer (LWD), were also collected to investigate the effectiveness of compaction at various locations. Results from this study indicated that the CCC reading CMV was able to identify the presence of underlying soft soil, a discovery which was validated using the DCP and LWD. The results from this study provide valuable insight into the behavior and potential benefits of utilizing CCC monitoring equipment during active construction.