Technology of air-transported stabilized dredged fill. Part 2: quality assessment

A framework for the quality assessment of cement-treated ground, based on considerations of reliability, the regionalized variable theory and the observational method, is presented. From the results of laboratory and preconstruction field tests, the reliability-based quality index is defined on the basis of a function representing the actual strength of the stabilized ground normalized by the design strength. Quality control during construction is carried out by adopting a threshold quality index satisfying the designated probability of failure. Taking advantage of the regionalized variable theory, the technique employs the results of cone penetration tests for semivariogram analysis and applies the kriging technique for optimal interpolation and development of isostrength contours within the stabilized ground for quality assurance. The applicability of the proposed technique is examined by means of a field pilot study presented in the previous phase of this study.