A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Improving the Performance of Deep Soil Mixing in Clay with Chemical Additives
Deep Soil Mixing (DSM) is adopted in various applications to improve the mechanical and hydraulic properties of different soil types, granular, plastic, or organic. Activity of plastic soils often inhibits the disaggregation of particles and their mixing with cement, with the result that lumps of untreated soil remain entrapped in the cement paste causing flaws to its homogeneity and mechanical properties. The paper presents the results of an experimental study aimed at testing the applicability of a chemical additive to improve workability and homogeneity of the paste and the mechanical performance of the aggregate. Two different materials, a kaolinite and a smectite, have been tested mixing them with Portland cement and an additive formed by a clay dispersant polymer dosed with various proportions. The modified performance is evaluated with a series of laboratory tests aimed at determining consistency limits, viscosity, and uniaxial compressive strength. The obtained results are interpreted in the light of the physio-chemical modification induced by the additive to the clay-water mixes.
Improving the Performance of Deep Soil Mixing in Clay with Chemical Additives
Deep Soil Mixing (DSM) is adopted in various applications to improve the mechanical and hydraulic properties of different soil types, granular, plastic, or organic. Activity of plastic soils often inhibits the disaggregation of particles and their mixing with cement, with the result that lumps of untreated soil remain entrapped in the cement paste causing flaws to its homogeneity and mechanical properties. The paper presents the results of an experimental study aimed at testing the applicability of a chemical additive to improve workability and homogeneity of the paste and the mechanical performance of the aggregate. Two different materials, a kaolinite and a smectite, have been tested mixing them with Portland cement and an additive formed by a clay dispersant polymer dosed with various proportions. The modified performance is evaluated with a series of laboratory tests aimed at determining consistency limits, viscosity, and uniaxial compressive strength. The obtained results are interpreted in the light of the physio-chemical modification induced by the additive to the clay-water mixes.
Improving the Performance of Deep Soil Mixing in Clay with Chemical Additives
Spagnoli, Giovanni (author) / Salvatore, Erminio (author) / Arciero, Michela (author) / Modoni, Giuseppe (author)
Geo-Congress 2022 ; 2022 ; Charlotte, North Carolina
Geo-Congress 2022 ; 186-195
2022-03-17
Conference paper
Electronic Resource
English
Improving the Performance of Deep Soil Mixing in Clay with Chemical Additives
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