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    Improvement of Problematic Soils by Lime Slurry Pressure Injection: Case Study

    Source: Journal of Geotechnical and Geoenvironmental Engineering:;2010:;Volume ( 136 ):;issue: 010
    Author:
    Alex Wilkinson
    ,
    Asadul Haque
    ,
    Jayantha Kodikara
    ,
    John Adamson
    ,
    David Christie
    DOI: 10.1061/(ASCE)GT.1943-5606.0000359
    Publisher: American Society of Civil Engineers
    Abstract: Lime slurry pressure injection (LSPI) is a stabilization operation used in problematic soils by transportation industries with the aim of improving the geotechnical properties and bringing excessive maintenance costs to an acceptable standard. This paper presents detailed field and laboratory studies of a lime/fly ash stabilized site at Breeza, NSW, Australia. The mixing of slurry into the soil with depths was investigated by excavating a trench while the improvement of geotechnical properties was determined in detailed field and laboratory tests. Visual observations of the surfaces of an excavated trench showed slurry to be distributed within the shrinkage cracks in the desiccated upper soil horizon whereas slurry was conveyed through planes of hydraulic fracture in the soils at greater depths. Laboratory swell tests on the stabilized soils demonstrated a statistically significant reduction of the intrinsic swell properties in the upper horizon of highly plastic clayey soils by LSPI. A gain in soil strength was observed in cone penetrometer test soundings conducted in stabilized soils. Scanning electron microscope and x-ray diffraction studies proved the underlying physicochemical and cementitious reaction processes in stabilized soils. Aggregation of the soils was observed with the outward diffusion of calcium cations within proximity of slurry seams and resulted in a subdued shrink/swell propensity.
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      Improvement of Problematic Soils by Lime Slurry Pressure Injection: Case Study

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    contributor authorAlex Wilkinson
    contributor authorAsadul Haque
    contributor authorJayantha Kodikara
    contributor authorJohn Adamson
    contributor authorDavid Christie
    date accessioned2017-05-08T21:46:52Z
    date available2017-05-08T21:46:52Z
    date copyrightOctober 2010
    date issued2010
    identifier other%28asce%29gt%2E1943-5606%2E0000374.pdf
    identifier urihttp://yetl.yabesh.ir/yetl/handle/yetl/62137
    description abstractLime slurry pressure injection (LSPI) is a stabilization operation used in problematic soils by transportation industries with the aim of improving the geotechnical properties and bringing excessive maintenance costs to an acceptable standard. This paper presents detailed field and laboratory studies of a lime/fly ash stabilized site at Breeza, NSW, Australia. The mixing of slurry into the soil with depths was investigated by excavating a trench while the improvement of geotechnical properties was determined in detailed field and laboratory tests. Visual observations of the surfaces of an excavated trench showed slurry to be distributed within the shrinkage cracks in the desiccated upper soil horizon whereas slurry was conveyed through planes of hydraulic fracture in the soils at greater depths. Laboratory swell tests on the stabilized soils demonstrated a statistically significant reduction of the intrinsic swell properties in the upper horizon of highly plastic clayey soils by LSPI. A gain in soil strength was observed in cone penetrometer test soundings conducted in stabilized soils. Scanning electron microscope and x-ray diffraction studies proved the underlying physicochemical and cementitious reaction processes in stabilized soils. Aggregation of the soils was observed with the outward diffusion of calcium cations within proximity of slurry seams and resulted in a subdued shrink/swell propensity.
    publisherAmerican Society of Civil Engineers
    titleImprovement of Problematic Soils by Lime Slurry Pressure Injection: Case Study
    typeJournal Paper
    journal volume136
    journal issue10
    journal titleJournal of Geotechnical and Geoenvironmental Engineering
    identifier doi10.1061/(ASCE)GT.1943-5606.0000359
    treeJournal of Geotechnical and Geoenvironmental Engineering:;2010:;Volume ( 136 ):;issue: 010
    contenttypeFulltext
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