Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Geotechnical Characterization of a Soil-Water Treatment Sludge Mixture
Application of soil-water treatment sludge (WTS) mixtures in earth works may reduce land disposal of WTS and exploitation of natural soils. This paper includes the geotechnical characterization and properties of a WTS and a soil-WTS mixture. The sludge was collected in a water treatment plant that generates 60 tons per day of sludge with 20-25% of solids. The investigated soil was a lateritic clayey sand, representative of a significant area of the state of Sao Paulo, Brazil. Compaction curve, plastic and liquid limits, and specific gravity of solids were obtained for WTS, soil and mixture. WTS and soil were also subjected to chemical and mineralogical characterization by X-ray fluorescence and diffraction, respectively. Compaction parameters were determined at standard proctor energy, and one-dimensional consolidation tests were carried out on compacted specimens. Results indicate that the geotechnical characteristics of the mixture are slightly different from those of the soil, and previous air-drying affects the compaction parameters of the mixture: the maximum dry unit weight increased and the optimum water content decreased for lower initial water contents in the compaction tests. Compression index Cc of the mixture is higher than that of the soil, however acceptable for a compacted soil in geotechnical works.
Geotechnical Characterization of a Soil-Water Treatment Sludge Mixture
Application of soil-water treatment sludge (WTS) mixtures in earth works may reduce land disposal of WTS and exploitation of natural soils. This paper includes the geotechnical characterization and properties of a WTS and a soil-WTS mixture. The sludge was collected in a water treatment plant that generates 60 tons per day of sludge with 20-25% of solids. The investigated soil was a lateritic clayey sand, representative of a significant area of the state of Sao Paulo, Brazil. Compaction curve, plastic and liquid limits, and specific gravity of solids were obtained for WTS, soil and mixture. WTS and soil were also subjected to chemical and mineralogical characterization by X-ray fluorescence and diffraction, respectively. Compaction parameters were determined at standard proctor energy, and one-dimensional consolidation tests were carried out on compacted specimens. Results indicate that the geotechnical characteristics of the mixture are slightly different from those of the soil, and previous air-drying affects the compaction parameters of the mixture: the maximum dry unit weight increased and the optimum water content decreased for lower initial water contents in the compaction tests. Compression index Cc of the mixture is higher than that of the soil, however acceptable for a compacted soil in geotechnical works.
Geotechnical Characterization of a Soil-Water Treatment Sludge Mixture
Montalvan, Edy L. T. (Autor:in) / Boscov, Maria Eugenia G. (Autor:in)
Geo-Chicago 2016 ; 2016 ; Chicago, Illinois
Geo-Chicago 2016 ; 418-427
08.08.2016
Aufsatz (Konferenz)
Elektronische Ressource
Englisch
Geotechnical Characterization of a Soil-Water Treatment Sludge Mixture
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