مهندسی سازه و ساخت

مهندسی سازه و ساخت

بررسی آزمایشگاهی تاثیر سرباره کوره آهن‌گدازی و کاتالیست پسماند کراکینگ بر پارامترهای مقاومتی و تحکیمی خاک رس نرم

نوع مقاله : علمی - پژوهشی

نویسندگان
گروه مهندسی عمران، دانشکده فنی مهندسی، دانشگاه رازی، کرمانشاه، ایران.
چکیده
سرباره کوره آهن‌گدازی و کاتالیست پسماند کراکینگ از جمله پسماندهای صنعتی می‌باشند که به دلیل خواص شیمیایی، کانی شناختی و فیزیکی مناسب می‌توانند جایگزین ارزشمندی برای مصالح سنتی متعارف باشند. در پژوهش حاضر به منظور بررسی اثر سرباره کوره آهن‌گدازی و کاتالیست پسماند کراکینگ بر پارامترهای مقاومتی و تحکیمی خاک رس نرم، از سرباره کوره آهن‌گدازی در مقادیر 1، 2، 3، 4 و 5 درصد وزن خشک خاک در کنار کاتالیست پسماند کراکینگ در مقادیر 5، 10، 15 و 20 درصد وزن خشک خاک استفاده شده است. ترکیب حالات مختلف، منجر به تهیه 20 طرح اختلاط گردید که در سه دوره عمل-آوری 7، 28 و 90 روز با انجام آزمایش‌های برش مستقیم، نسبت باربری کالیفرنیا و تحکیم یک بعدی مورد بررسی قرار گرفت. نتایج نشان داد که اثر توام سرباره کوره آهن‌گدازی و کاتالیست پسماند کراکینگ موجب افزایش چسبندگی، زاویه اصطکاک داخلی و نسبت باربری و کاهش شاخص فشردگی و تورم خاک مورد تثبیت می‌گردد. همچنین بهینه‌ترین طرح اختلاط شامل 20 درصد کاتالیست پسماند کراکینگ و 3 درصد سرباره کوره آهن‌گدازی می‌باشد که بیشترین تاثیر را بر بهبود پارامترهای مقاومتی و تحکیمی خاک داشت. همینطور با انجام آنالیزهای ریزساختار و شیمیایی مشخص گردید که حضور افزودنی‌ها موجب کاهش تخلخل و افزایش واکنش-های پوزولانی می‌گردد.
کلیدواژه‌ها

موضوعات


عنوان مقاله English

Experimental Investigating the Effect of Ground Granulated Blast Furnace Slag and Cracking Catalyst Residue on the Strength and Consolidation Parameters of Soft Clay Soil

نویسندگان English

Hassan Sharafi
Ali Kolahi
Reza Fathi
Department of Civil Engineering, Faculty of Engineering, Razi University, Kermanshah, Iran.
چکیده English

The use of industrial wastes and by-products in soil stabilization to reduce costs and environmental pollution has gained significant attention in recent years. Ground granulated blast furnace slag and cracking catalyst residue are industrial waste materials that can be a valuable alternative to conventional traditional materials due to their suitable chemical, mineralogical, and physical properties. In this study, to investigate the effect of ground granulated blast furnace slag and cracking catalyst residue on the strength and consolidation parameters of soft clay soil, 1%, 2%, 3%, 4%, and 5% ground granulated blast furnace slag by total dry weight of soil along with 5%, 10%, 15%, and 20% cracking catalyst residue by total dry weight of soil have been used. This resulted in 20 different mixing designs, which were evaluated in three curing periods of 7, 28, and 90 days by performing direct shear, California bearing ratio, and one-dimensional consolidation tests. The results showed that the effect of Ground granulated blast furnace slag and cracking catalyst residue increases cohesion, internal friction angle, and bearing ratio and decreases compaction index, and swelling of the stabilized soil. Also, the optimal mixing design comprised 20% cracking catalyst residue and 3% Ground granulated blast furnace slag, which exhibited the greatest improvement in soil strength and consolidation parameters. Additionally, by performing microstructural and chemical analyses on samples, it was determined that the presence of additives reduces porosity and increases pozzolanic reactions.

کلیدواژه‌ها English

Soil stabilization
soft clay
iron-smelting furnace slag
cracking waste catalyst
California load ratio
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  • تاریخ دریافت 03 آذر 1403
  • تاریخ بازنگری 28 دی 1403
  • تاریخ پذیرش 17 فروردین 1404