Lime Treatment of a Soft Sensitive Clay: A Sustainable Reuse Option
| Autor: | Evelina Fratalocchi, Bruno Di Buò, Tim Länsivaara, Marta Di Sante |
|---|---|
| Přispěvatelé: | Tampere University, Civil Engineering, Research group: Foundation Structures |
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
1171 Geosciences
water content lcsh:QE1-996.5 0211 other engineering and technologies 020101 civil engineering 02 engineering and technology Reuse engineering.material Pulp and paper industry complex mixtures 0201 civil engineering lime stabilization lcsh:Geology Curing time Hydraulic conductivity Soft clay soil re-use engineering General Earth and Planetary Sciences Environmental science Soil treatment Water content soft clay 021101 geological & geomatics engineering Lime |
| Zdroj: | Geosciences Volume 10 Issue 5 Geosciences, Vol 10, Iss 182, p 182 (2020) |
| ISSN: | 2076-3263 |
| DOI: | 10.3390/geosciences10050182 |
| Popis: | This paper presents the results of research aimed at studying the hydraulic and mechanical behavior of Finnish soft clays treated by quicklime. This research investigated the effect of water content and curing time on the characteristics of the compacted soil treated with 7% lime, with the aim of verifying the effectiveness of lime treatment and evaluating its possible re-use, thus avoiding landfill disposal. A laboratory-testing program was carried out both on treated and untreated soil, supported by microstructural investigation. Results have shown a general increase of the hydraulic conductivity due to the addition of lime, reduction of compressibility, and increase in the soil shear strength for a wide range of water contents (10%&ndash 40%), proving the effectiveness of the lime treatment. Lime addition to the compacted clay at high water contents (90%&ndash 130%) turned out to improve the mechanical characteristics to a lesser extent, while fractionated lime supply did not significantly improve the mechanical performance. The results of this research demonstrate that the re-use of sensitive clays, typically of high water contents, by lime addition require a drying process. Different drying procedures can be adopted (proposed in the paper) depending on the specific site conditions. However, the soil treatment is generally economically convenient in comparison to the disposal in waste landfills, which would represent the only alternative solution. |
| Databáze: | OpenAIRE |
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