2021
DOI: 10.1007/s40891-021-00318-2
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Mechanism of Carbonation in Lime-Stabilized Silty Clay from Chemical and Microstructure Perspectives

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Cited by 12 publications
(3 citation statements)
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“…Otherwise, the carbonation of unreacted lime and pozzolanic products adversely affects the long-term mechanical response [21][22][23]. The effects of lime treatment on unstructured clayey soil with regards to the microstructure, stiffness, shear strength, permeability and durability have been deeply investigated by the pioneering works [14,24,25] and by recent increasingly detailed research [26][27][28][29][30][31][32][33]. However, due to the scale effect of the stabilisation technique, there is a need to test the in situ behaviour of the treated geomaterials employing experimental test embankments [34].…”
Section: Introductionmentioning
confidence: 99%
“…Otherwise, the carbonation of unreacted lime and pozzolanic products adversely affects the long-term mechanical response [21][22][23]. The effects of lime treatment on unstructured clayey soil with regards to the microstructure, stiffness, shear strength, permeability and durability have been deeply investigated by the pioneering works [14,24,25] and by recent increasingly detailed research [26][27][28][29][30][31][32][33]. However, due to the scale effect of the stabilisation technique, there is a need to test the in situ behaviour of the treated geomaterials employing experimental test embankments [34].…”
Section: Introductionmentioning
confidence: 99%
“…C. Unluer conducted exploratory, experimental research on simulated sand and silt solidified by MgO carbonization and found that MgO solidified soil has the advantages of a short construction period and high strength compared with cement solidified soil and verified the feasibility of active MgO in the field of soil sample reinforcement [3]. Padmaraj et al studied the carbonization mechanism of lime-stabilized silty clay from the chemical and microscopic perspectives with a lime content of 4% and 8%, and proposed that the carbonization time is too long, which will damage its strength, but this study did not include higher lime dosage samples [4]. E. Vitale et al also proposed that carbonation affects the chemical and mineralogy evolution of lime-treated soil, depending on the time scale of the reaction mechanism, indicating that different slaking times have a great impact on the performance of lime-treated soil [5].…”
Section: Introductionmentioning
confidence: 92%
“…As the reaction continues, the amount of calcium carbonate produced increases, and its strength rises again due to the volume expansion of about 17% during the transformation of calcium hydroxide to calcium carbonate [35], making the soil more compact. However, the higher the lime content, the larger the gel pores of the reaction product [4], and more calcium carbonate can be filled, which is the main reason for the increase in strength of 22.5% doped CaO at 72h of ageing. But as the reaction continues, the continued carbonisation of the calcium hydroxide wrapped around the carbonised product layer will lead to the expansion and cracking of the product layer, producing original microcracks leading to a reduction in strength.…”
Section: Microstructural Analysismentioning
confidence: 99%