The Effect of Rice Husk Ash on Mechanical Properties of Clayey Soils Stabilized with Lime in the Presence of Sulphate
محل انتشار: فصلنامه زمین شناسی مهندسی، دوره: 11، شماره: 3
سال انتشار: 1396
نوع سند: مقاله ژورنالی
زبان: انگلیسی
مشاهده: 404
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شناسه ملی سند علمی:
JR_JEG-11-3_007
تاریخ نمایه سازی: 20 آبان 1397
چکیده مقاله:
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 of view. 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 addressed Sulphates exist in the constitution of the soil. Unconfined compression strength and swelling potentials of the stabilized soil are evaluated. The results of this study indicate that RHA has positive impacts on improving mechanical properties of the gypsum clays stabilized with lime. 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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نویسندگان
Mohammad Hossin Bazyar
Department of Civil Engineering, Faculty of Engineering, Yasooj Univeersity
Mostafa Ebrahimi
Department of Civil Engineering, Faculty of Engineering, Yasooj Univeersity
Mehdi Zamani Lenjani
Department of Civil Engineering, Faculty of Engineering, Yasooj Univeersity
Masoud Makarchian
Department of Civil Engineering, Faculty of Engineering, Bu-Ali Sina University, Hamedan