عنوان مقاله :
The Effect of Rice Husk Ash on Mechanical Properties of Clayey Soils Stabilized with Lime in the Presence of Sulphate
پديد آورندگان :
Bazyar ، Mohammad Hossin Yasooj Univeersity - Faculty of Engineering - Department of Civil Engineering , Ebrahimi ، Mostafa Yasooj Univeersity - Faculty of Engineering - Department of Civil Engineering , Zamani Lenjani ، Mehdi Yasooj Univeersity - Faculty of Engineering - Department of Civil Engineering , Makarchian ، Masood Bu-Ali Sina University - Faculty of Engineering - Department of Civil Engineering
كليدواژه :
Gypsum clay , Unconfined Strength , Swelling potential , Stabilization , Rice Husk Ash. ,
چكيده فارسي :
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 increase 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 ndash;8% lime and 810% RHA as an optimum amount is recommended.
عنوان نشريه :
نشريه زمين شناسي مهندسي
