ABSTRACT
The quality of stabilized soil depends upon a number of factors including the type and condition of original soil, the type and amount of binder, and the execution process as described in Chapter 2. The quality control and quality assurance (QC/QA) practice which focuses upon the quality of stabilized soil was originally established in Japan and the Nordic countries and has been accepted worldwide for more than three decades. It comprises a laboratory mix test, field trial test, monitoring and control of construction parameters during execution and verification by measuring the engineering characteristics of stabilized soil either by unconfined compression tests on core samples or by sounding. Diversification of application, soil type, and execution system, together with the improved understanding on the behavior of improved ground necessitate our profession to review the current QC/QA practice.
