Effect of the sample preparation on geotechnical properties of partially saturated lime-cement treated silt
RAZAKAMANANTSOA ; DAVID ; RAYSSAC ; AURIOL
Type de document
COMMUNICATION PAR AFFICHE (AFF)
Langue
anglais
Auteur
RAZAKAMANANTSOA ; DAVID ; RAYSSAC ; AURIOL
Résumé / Abstract
Original approach is held to raise how important is the mixing process on the laboratory compaction behaviour of treated soil dedicated to earthwork. Several series oflaboratory testing are carried out. Sample is first identified and prepared to its normal proctor moisture content, then, respectively mixed with 1% of CaO and 5% ofCement CEM2 42,5R.Grading curve; compaction, optic Microscopy and MEB observations are performed on non compacted and compacted mixing for each step of thelaboratory preparation. Tests results raise the influence of the CaO and Cement treatment on the instantaneous microstructure behaviour of the silty sample. The gradingdistribution of the mixing and the quality of compaction of each samples seem to be intimately linked to the duration of mixing process. Microstructure observations are actually performed after each step of mixing process in order to highlight its mechanism. This study are focused on the importance of the mixing process for enhancing the laboratory compaction behaviour and draws attention to the necessity of taking into account this phenomenon for qualifying the in situ treatment.
