Abstract    The major decision in construction process involves the selection of suitable site with best soil conditions, as structure resides in the soil. Most problematic soils like expansive soils hardly proved to be the best engineering subgrade profile for pavement constructions. Thus, this has undeniably led to the soil improvement options accompanying the reduction in resource depletion and solid waste management. Therefore, soil stabilization technique opted in the treatment of expansive soils. In concern of all these facts in this study, an effort was made in investigating the viability of utilizing industrial waste Ground Granulated Blast furnace Slag (GGBS) and agricultural waste Groundnut Shell Ash (GSA) as stabilizing agents. Two soils of different swell characteristics were treated with varying percentages of GGBS (2.5, 5, 7.5, and 10%) and GSA (2, 4, 6, 8, and 10%) at different curing periods of 28 and 60 days. The ascending behaviour of strength was experimentally analyzed by conducting Unconfined Compressive Strength and California Bearing Ratio (CBR) tests. The uptrend in peak stresses coupled with improved CBR value implicated the efficacy of cost-effective waste materials in ascending the strength nature of the soil, thereby amplifying the growth of construction sector. Thus, this study catalyzed in enhancing the bearing strength of clayey soil; in this manner making it well suitable for multitudinous geotechnical applications.

Keywords    Unconfined Compresive Strength; California Bearing Ratio; Ground Granulated Blast Slag; Groundnutshell Ash

چکیده    تصمیم اصلی در ساخت و ساز عمرانی شامل انتخاب محل مناسب با بهترین شرایط خاک می باشد زیرا ساختار خاک حائزاهمیت است. بیشتر خاک های مشکل ساز بوده مانند خاک های فراوان به سختی ثابت می شود که بهترین پروفیل زیرزمینی مهندسی برای سازه های پیاده رو است. به این ترتیب، این به وضوح منجر به بهبود گزینه های خاک همراه با کاهش منابع و مدیریت پسماندهای جامد شده است. بنابراین، روش تثبیت خاک، در بهبود مقاومت خاک های گسترده بوده و نیز گسترش یافته است. در نگرانی از همه این واقعیت ها در این مطالعه، تلاش برای بررسی قابلیت استفاده از سرباره انفجار صنعتی (GGBS) و ضایعات زراعی کشاورزی (Shell Ash) (GSA) به عنوان عوامل تثبیت کننده، بکار رفته است. دو نوع از ویژگی های مختلف تورم با درصد متفاوتی از GGBS (2.5، 5، 7.5، و 10٪) و GSA (2 ، 4، 6، 8 و 10٪) در دوره های زمانب مختلف برای بعمل آوری 28 و 60 روز تحت درمان قرار گرفتند. رفتار صعودی قدرت با استفاده از آزمون های مقاومت فشاری و غلظت کالیبره کالیفرنیا (CBR) آزمایش شده است. روند صعودی در اوج تنش همراه با افزایش ارزش CBR موجب شده تا اثر مواد زائد مقرون به صرفه شود و در بهبود مقاومت خاک، به این ترتیب رشد و توسعه بخش ساخت و ساز را تقویت می کند. بنابراين، اين تحقيق در جهت افزايش قدرت مقاومت خاك رسي صورت پذيرفت. به این ترتیب ساخت آن برای برنامه های کاربردی ژئوتکنیک بسیار متنوع و مناسب است.

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