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Title
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The Effect of Rice Husk Ash on Mechanical Properties of Clayey Soils Stabilized with Lime in the Presence of Sulphate
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Type
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JournalPaper
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Keywords
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Gypsum clay, Unconfined Strength, Swelling potential, Stabilization Rice Husk Ash.
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Abstract
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Geotechnical engineers, in many cases face with low strength or high swelling potential of clayey soils. Stabilization methods are used to improve the mechanical properties of this type of soils. Lime and cement are the most popular materials used in chemical stabilization of clayey soils. If sulphate exists in the stabilized clayey soil with lime, or if soil is exposed to sulphates, problems such as strength reduction and swelling will occur. Reuse of industrial residual such as Rice Husk Ash (RHA) can be beneficial from the economy point ofview. RHA includes a proper amount of silica with high specific surface area which is very suitable for activating the reaction between the soil and lime. In this paper, chemical stabilization of gypsum clays using lime and RHA is addressedthe results of this study indicate that RHA has positive impacts on improving mechanical properties of the gypsum clays stabilized withlime. From the view point of strength and swelling characteristics, and economy, addition of 6–8% lime and 8-10% RHA as an optimum amount is recommended
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Researchers
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Masoud Makarchian (Fourth Researcher), Mohammad Zamani Lenjani (Third Researcher), Mostafa Ebrahimi (Second Researcher), Mohammad Hasn Bazyar (First Researcher)
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