Laboratory study on the applicability of molding procedures for the preparation of cement stabilised specimens

摘要

An international collaborative study has been undertaken to establish common understanding of the key issues involved in Quality Assurance/Quality Control of deep mixing techniques. This paper focuses on comparing different laboratory techniques used in treatability procedures of deep mixing technology applications. The applicability of different molding procedures in function of the initial consistency of the mixture has been investigated, considering the specimens mechanical properties and test results repeatability. The results of a first series of tests, performed on Kawasaki marine clay with different initial water contents, are presented. Six mixtures with different consistency were produced using ordinary Portland cement added to the soil in dry form changing the amount of binder. Four molding techniques, namely Dynamic Compaction, Tapping, Rodding and No Compaction were used. The results provide a base to select the right molding technique in function of the soil-binder mixture consistency that produces the best specimens quality.