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مطالعه آزمایشگاهی تأثیر افزودن پودر آهن بههمراه سیمان بر مقاومت فشاری خاک کائولینیت | ||
| نشریه مهندسی عمران و محیط زیست | ||
| مقاله 6، دوره 55، شماره 121، 1404، صفحه 67-77 اصل مقاله (1.82 M) | ||
| نوع مقاله: مقاله کامل پژوهشی | ||
| شناسه دیجیتال (DOI): 10.22034/ceej.2026.70116.2467 | ||
| نویسندگان | ||
| حامد یوسفی* 1؛ سید مرتضی مرندی1؛ صلاح الدین حمیدی* 2 | ||
| 1گروه مهندسی عمران، دانشکده فنی و مهندسی، دانشگاه شهید باهنر، کرمان | ||
| 2گروه مهندسی عمران، دانشکده فنی و مهندسی کبودرآهنگ، دانشگاه بوعلی سینا، همدان | ||
| چکیده | ||
| خاکهای رسی بهطور وسیع در سطح کره زمین یافت میشود. با توجه به افزایش جمعیت، نیاز به احداث سازههای متنوع بر روی این نوع خاکها اجتنابناپذیر است. جهت احداث چنین سازههایی بر روی خاکهای رسی، عموماً این نوع خاکها میبایست بهسازی شوند. مطالعات زیادی در رابطه با تأثیر افزودنیهای مختلف جهت تثبیت خاکهای رسی انجام شده ولی نقش پودر آهن (Pfe) همچنان ناشناخته مانده است. در مطالعه حاضر خاک رس کائولینیت جهت تثبیت با افزودنیهای پودر آهن و سیمان با درصدهای مختلف (0، 5، 10 و 20) و دورههای عملآوری 7 و 28 روزه، مورد مطالعه قرار گرفت. آزمایش مقاومت فشاری تکمحوری بر روی نمونهها انجام شد. مقدار بهینه پودر آهن و سیمان بهترتیب 10 و 5 درصد وزنی خشک خاک تعیین شد. مقاومت فشاری خاک عملآوری شده با مقادیر بهینه پودر آهن و سیمان نسبت به خاک تمیز برای نمونههای 7 روزه بهترتیب 34 و 72 درصد و برای نمونههای 28 روزه بهترتیب 72 و 65 درصد افزایش داشت. همچنین عملکرد ریزساختاری و واکنشهای شیمیایی مناسب پودر آهن و کانیهای رسی و سیمان نسبت به خاک تمیز، در نمونههای 28 روزه باعث افزایش مقاومت تا 331 درصد شد. | ||
| کلیدواژهها | ||
| خاک رس؛ کائولینیت؛ تثبیت خاک؛ مقاومت فشاری تکمحوری؛ پودر آهن | ||
| مراجع | ||
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