Carbonation investigation on atmospherically exposed lime-treated silty soil

Article Engineering, Geological

Influence of pore fluid-soil structure interactions on compacted lime-treated silty soil

Geetanjali Das et al.

Summary: This study investigates the effects of chemical interactions between pore solution and soil components on the hydromechanical performance of lime-treated soil. The results show that kneading action during compaction causes aggregate deformation and reduces the number of macropores. This increases the hydraulic tortuosity and prolongs the pore fluid-soil structure contact, favoring long-term pozzolanic reactions. Furthermore, it is found that demineralized water is more aggressive than low-ionic strength solution, leading to increased leaching of Calcium and negatively impacting the hydromechanical performance.

ENGINEERING GEOLOGY (2022)

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Article Construction & Building Technology

The carbonation of a lime-treated soil: experimental approach

Dimitri Deneele et al.

Summary: This paper presents an experimental study on the macroscopic properties of a lime-treated silty soil after carbonation. The results show that samples undergoing carbonation experience a rapid increase in strength, but the rate of increase and final values differ under different conditions.

MATERIALS AND STRUCTURES (2021)

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Article Engineering, Civil

Compressive strength and microstructure evolution of lime-treated silty soil subjected to kneading action

Geetanjali Das et al.

Summary: The long-term improvement in soil behavior after lime treatment is influenced by the mechanism of implementation, with kneading action leading to better lime dispersion and enhanced pozzolanic reactions. Compacting lime-treated soil with kneading at Wet Moisture Content (WMC) higher than Optimum Moisture Content (OMC) benefits the evolution of Unconfined Compressive Strength (UCS) in specimens subjected to longer and accelerated curing. The UCS evolution in laboratory accelerated-cured kneaded soil is comparable to the average UCS measured in in-situ 7 years atmospherically cured kneaded soil.

TRANSPORTATION GEOTECHNICS (2021)

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Article Engineering, Environmental

Effects of carbonation on chemo-mechanical behaviour of lime-treated soils

E. Vitale et al.

Summary: This study presents a multi-scale experimental investigation on the carbonation process and its impact on the chemo-mechanical behavior of lime-treated soil. The research reveals that the carbonation process affects the chemo-mineralogical evolution of lime-treated soils, depending on the time scale at which the reaction mechanism takes place. In the short term, carbonation of portlandite leads to the formation of calcium carbonate, while in the long term, carbonation of secondary phases weakens the bonding effects induced by hydrated compounds.

BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT (2021)

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Article Engineering, Civil