Print Email Facebook Twitter Compaction of silty sands through biogenic gas desaturation pretreatment Title Compaction of silty sands through biogenic gas desaturation pretreatment Author Andrag, Gustav (TU Delft Civil Engineering and Geosciences; TU Delft Geoscience and Engineering) Contributor Jommi, Cristina (mentor) van Paassen, Leon (mentor) Askarinejad, Amin (mentor) Aarninkhof, Stefan (mentor) van der Star, WRL (mentor) Degree granting institution Delft University of Technology Programme Geo-Engineering Date 2017-10-18 Abstract This thesis entitled “Compaction of Silty Sands through Biogenic Gas Desaturation Pretreatment” investigates a method to improve compactibility of an initially fully saturated soil body bringing it to a saturation corresponding to the optimum water content of the targeted soil layer. The process comprisestwo stages: a reaction phase to desaturate the soil body, and compaction phase where the necessary loading is applied to the system. The substrate solution with predetermined concentration, combined with a bacterial inoculum to convert the substrate into nitrogen gas, is injected into the soil and left to react.Gas is produced in-situ as a result of the stimulation of the bacteria which creates a local overpressure and expels water from the system. The desaturated soil body is subsequently compacted. The aim is to achieve a higher degree of compaction with the same energy, or the same degree of compaction withless energy input in the desaturated soil as opposed to the fully saturated case where energy is wasted on expelling water. Subject Microbial induced desaturationCompactionDesaturationMIDGround inprovement To reference this document use: http://resolver.tudelft.nl/uuid:ffe815bc-fda5-4e82-ad1a-046666018d41 Part of collection Student theses Document type master thesis Files PDF GM_Andrag_Microbial_desat ... 102017.pdf 14.26 MB Close viewer /islandora/object/uuid:ffe815bc-fda5-4e82-ad1a-046666018d41/datastream/OBJ/view