Evaluation of Seismic Testing for Quality Assurance of Lime-Stabilized Soil.

摘要

This study sought to determine the technical feasibility of using seismic techniques to measure the laboratory and field seismic modulus of lime-stabilized soils (LSS), and to compare/correlate test results from bench-top (free-free resonance) seismic testing on LSS cylinders to in-situ (surface seismic) testing performed on field-constructed LSS. In addition, this research sought to develop a pilot specification for quality assurance of LSS using seismic test methods. The growth of modulus was found to vary as a nonlinear function of both temperature and curing time. Differences in modulus growth between free-free resonance (LSS cylinders) and surface wave (field-constructed LSS) data can be attributed to constructionrelated issues, and are not the result of testing equipment/practice. The study supports the recommendations of the CDOT specification for LSS (Section 307) in that grading should be performed immediately after construction as grading conducted on later days (i.e., days 4-8) resulted in significant seismic modulus loss on field-constructed LSS.