نوع مقاله: مقاله پژوهشی
نویسندگان
1 دانشجوی دکتری سازه های آبی گروه علوم و مهندسی آب دانشگاه فردوسی مشهد (پردیس بین الملل).
2 دانشیار و عضو هیئت علمی گروه علوم و مهندسی آب دانشگاه فردوسی مشهد
3 استاد و عضو هیئت علمی گروه علوم و مهندسی آب دانشگاه فردوسی مشهد.
چکیده
استفاده از یکسری افزودنیها به خاک‌های گچی می‌تواند سبب افزایش مقاومت فشاری و فرسایشی و مناسب شدن آن‌ها برای اجرای پروژه‌های عمرانی در شبکه‌های آبیاری گردد. در این مقاله، با افزودن پنج سطح سیمان (5، 8، 10، 12 و 15 درصد نسبت به خاک خشک)، سه سطح میکروسیلیس (0، 5 و 10 درصد نسبت به سیمان) به خاک منطقه و عمل‌آوری نمونه‌ها در دو دمای (27 و 40 درجه سانتی‌گراد )،مقاومت فشاری آن‌ها بررسی و با نرم افزار آماری SAS تجزیه و تحلیل گردید. در این تحقیق بهترین ترکیب با در نظر گرفتن حداقل مواد افزودنی به خاک منطقه، برای رسیدن به مقاومت فشاری بالا با افزودن 10% سیمان و 10% میکروسیلیس تشخیص داده شد. در همین راستا به‌منظور بررسی توان فرسایشی، این نمونه تحت تأثیر جت آب صفحه‌ای در چهار زاویه (درجه90،60،30، 0 Ө =)، پنج سرعت (متر بر ثانیه 64/8 و 8 ،6،4، 2 V =) و سه زمان (ساعت 12،8، 4 T =) قرار گرفت و بیشترین افت وزنی فرسایشی (dw) در حد فاصل سرعت 4 تا 8 متر بر ثانیه و زمان 8 ساعت به بعد و در حالت افقی (0 Ө =) مشاهده گردید.
کلیدواژه‌ها
موضوعات
عنوان مقاله [English]
The Effect of Adding Resistance Supplementary Materials to Gypsum Soils for Lining Water Conveyance Channels
نویسندگان [English]
- Babak Taghdisi 1
- Kazem Kesmaeili 2
- Saeid Reza Khodashenas 3
1 PhD Student, Department of Water Engineering, Faculty of Agriculture, Ferdowsi University of Mashhad (International campus).
2 Associate Professor, Department of Water Engineering, Faculty of Agriculture, Ferdowsi University of Mashhad).
3 Associate Professor, Department of Water Engineering, Faculty of Agriculture, Ferdowsi University of Mashhad.
چکیده [English]
Using some additive materials to gypsum soil can increase its compressive strength and erosion and make it fit for civil projects in irrigation networks. In this study, (Journal No. 268., 2003) five levels of cement (5, 8, 10, 12 and 15 % to dry soil) and three levels of micro silica (0, 5 and 10 % cement) were added to the local soil. The processing of soil samples were conducted in two temperature (27 and 400C) and their compressive strength was studied and analyzed via SAS statistical software. In the present research, the best combination, with the minimum addition and a high compressive strength, was reached by adding 10% cement and 10% micro silica to the soil. In order to evaluate the sample’s erosion potential, it was exposed to water jet plane in four angles (Ө = 0,30,60, 90), five speeds (V = 2, 4, 6, 8 and 8.64 m/s) and three times (T =4,8 and 12 hr) and the highest weight loss erosion (dw) was observed between the speed of 4 to 8 m/s and the time of 8 hours later in a horizontal state (0 Ө =). .
کلیدواژه‌ها [English]
- Soil stabilization
- Silica
- Cement
- Lining water conveyance channels
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