Multi-scale analysis on the effects of lime treatment on a kaolinite soil |
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| Enza Vitale, Giacomo Russo, Dimitri Deneele |
- Abstract:
- A relevant issue in the physical and hydromechanical behaviour of lime treated soil is the physico-chemical evolution of the system and its influence on the microstructural features of the treated soil. In the present study a multi-scale investigation on the short and long term effects of a lime treated kaolinite has been performed. Aim of the experimental work is the analysis of the link between the ongoing of the reactions induced by lime and the macroscopic evolution of soil properties. Some of the results obtained by means of oedometer tests on not treated and lime stabilised samples have been presented in the paper. The mechanical tests were complemented by investigations at microscopic level. The mineralogical changes induced by lime addition were monitored at increasing curing time by means of thermogravimetric analysis (TGA). The effects of lime addition on the clay particles arrangement were investigated by means of zeta potential and dynamic light scattering (DLS) measurements. Test results reveal a low reactivity of lime treated kaolinite to promote the development of pozzolanic reactions. The formation of hydrated phases was observed only starting from 28 days of curing proving that the improvement of soil properties is ruled by microstructure and not by bonding compounds resulting from pozzolanic reactions.
- Keywords:
- Lime Treatment, Chemo-Physical Evolution, Microstructure, Mechanical Behaviour
- Download:
- IMEKO-TC4-GEO-2016-06.pdf
- DOI:
- -
- Event details
- IMEKO TC:
- TC4
- Event name:
- TC4 International Workshop on Metrology for Geotechnics 2016
- Title:
1st IMEKO TC4 International Workshop on Metrology for Geotechnics
- Place:
- Benevento, ITALY
- Time:
- 17 March 2016 - 18 March 2016