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Effect of Lime and Rice Husk Ash on Horizontal Saturated Hydraulic Conductivity of Sandy Loam Soils
Abstract Saturated hydraulic conductivity ($ K_{sat} $) of soil is one of the most frequently used parameters in geotechnical studies especially in the case of structures in permanent contact with water. This property is significantly influenced by pore distribution and surface characteristics of soil particles. In this study, a physical model was utilized to investigate the effect of varying amounts (2, 4 and 6% of weight) of hydrated Lime and hydrated Lime-Rice husk ash mixture (LRHA) with 1:1 ratio on the horizontal hydraulic conductivity ($ k_{sat-h} $) of a compacted sandy loam soil. The horizontal saturated permeability of samples was tested after 28 days of curing. Results indicated that a soil mixture including 4% hydrated lime, increased the initial hydraulic conductivity significantly. While adding greater amounts of lime reduced the $ K_{sat} $ due to the lime filling the pores of the sandy soil. It is also shown that adding 2% of LRHA had a slight incremental effect on the $ K_{sat} $. Nevertheless, mixtures including 4% and 6% LRHA led to the reduction of the initial hydraulic conductivity up to 65% and 50% respectively. Comparing the results in the same amount of additives, it can be concluded that the reduced $ K_{sat} $ of mixtures with LRHA is the result of the participation of the LRHA in pozzolanic reactions which reduces the $ K_{sat} $ and not filling the pores of the soil simply.
Effect of Lime and Rice Husk Ash on Horizontal Saturated Hydraulic Conductivity of Sandy Loam Soils
Abstract Saturated hydraulic conductivity ($ K_{sat} $) of soil is one of the most frequently used parameters in geotechnical studies especially in the case of structures in permanent contact with water. This property is significantly influenced by pore distribution and surface characteristics of soil particles. In this study, a physical model was utilized to investigate the effect of varying amounts (2, 4 and 6% of weight) of hydrated Lime and hydrated Lime-Rice husk ash mixture (LRHA) with 1:1 ratio on the horizontal hydraulic conductivity ($ k_{sat-h} $) of a compacted sandy loam soil. The horizontal saturated permeability of samples was tested after 28 days of curing. Results indicated that a soil mixture including 4% hydrated lime, increased the initial hydraulic conductivity significantly. While adding greater amounts of lime reduced the $ K_{sat} $ due to the lime filling the pores of the sandy soil. It is also shown that adding 2% of LRHA had a slight incremental effect on the $ K_{sat} $. Nevertheless, mixtures including 4% and 6% LRHA led to the reduction of the initial hydraulic conductivity up to 65% and 50% respectively. Comparing the results in the same amount of additives, it can be concluded that the reduced $ K_{sat} $ of mixtures with LRHA is the result of the participation of the LRHA in pozzolanic reactions which reduces the $ K_{sat} $ and not filling the pores of the soil simply.
Effect of Lime and Rice Husk Ash on Horizontal Saturated Hydraulic Conductivity of Sandy Loam Soils
Fathi-Moghaddam, Manoochehr (author) / Tavakol-Sadrabadi, Mohammad (author) / Tajbakhsh, Mohammad (author)
2019
Article (Journal)
Electronic Resource
English
BKL:
57.00$jBergbau: Allgemeines
/
38.58
Geomechanik
/
57.00
Bergbau: Allgemeines
/
56.20
Ingenieurgeologie, Bodenmechanik
/
38.58$jGeomechanik
/
56.20$jIngenieurgeologie$jBodenmechanik
Effect of Lime and Rice Husk Ash on Horizontal Saturated Hydraulic Conductivity of Sandy Loam Soils
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