Laboratory study on the effectiveness of nanoclay in internal erosion of Dispersive Clayey Soils in embankmen dams
Message:
Article Type:
Research/Original Article (دارای رتبه معتبر)
Abstract:
Construction of hydraulic structure on dispersive soil created a lot of problems such as piping or internal erosion. Since it is not economical to change dispersive soil with non- dispersive soil, therefore, it is very important to improve the erosion resistance of soils using appropriate and cost effective techniques. This research is intended to study the effect of adding nano-clay on erodibility of dispersive soil. The nano-clay (montmorillonite) has been used as a modern and eco-friendly additives for controlling internal erosion in dispersive soils. To conduct this research, dispersive soil has been treated with four different percentages (i.e. 0, 0.5, 1, 1.5 and 3 % by weight of the parent soil) of nano-clay. The Variables taken into account are the curing time (i.e. 1, 2, 7, 14 and 28 days) and the mixing percentages. Erodibility parameters were obtained by the Hole Erosion Test (HET) in different hydraulic gradients (i.e. 7.05, 7.96 and 11.05). It is found that increase in nano-clay content is increasing the resistance of dispersive soil to erosion. The optimum amount of nanoclay in reducing erosion for samples of one day curing time was obtained 1% and the erosion index rate was 4.33. For 2 and 7 days curing times the  optimum amount of nanoclay was observed equal to 1.5% and the index of erosion rate was 4.85 and 4.72, respectively. It was also observed that in larger hydraulic gradients, the effect of nanoclay in reducing erosion is more. Also, increasing nano-clay addetive changed plastic index properties of soil.
Language:
Persian
Published:
Quranic Knowledge Research, Volume:19 Issue: 2, 2019
Pages:
101 to 112
magiran.com/p2022630  
دانلود و مطالعه متن این مقاله با یکی از روشهای زیر امکان پذیر است:
اشتراک شخصی
با عضویت و پرداخت آنلاین حق اشتراک یک‌ساله به مبلغ 990,000ريال می‌توانید 70 عنوان مطلب دانلود کنید!
اشتراک سازمانی
به کتابخانه دانشگاه یا محل کار خود پیشنهاد کنید تا اشتراک سازمانی این پایگاه را برای دسترسی نامحدود همه کاربران به متن مطالب تهیه نمایند!
توجه!
  • حق عضویت دریافتی صرف حمایت از نشریات عضو و نگهداری، تکمیل و توسعه مگیران می‌شود.
  • پرداخت حق اشتراک و دانلود مقالات اجازه بازنشر آن در سایر رسانه‌های چاپی و دیجیتال را به کاربر نمی‌دهد.
دسترسی سراسری کاربران دانشگاه پیام نور!
اعضای هیئت علمی و دانشجویان دانشگاه پیام نور در سراسر کشور، در صورت ثبت نام با ایمیل دانشگاهی، تا پایان فروردین ماه 1403 به مقالات سایت دسترسی خواهند داشت!
In order to view content subscription is required

Personal subscription
Subscribe magiran.com for 50 € euros via PayPal and download 70 articles during a year.
Organization subscription
Please contact us to subscribe your university or library for unlimited access!