4TH International Congress on Technology - Engineering & SCIENCE - Kuala Lumpur - Malaysia (2017-08-05)

Effect Of Nano¬clay On Piping Erosion In Earth Dams

Scouring and internal erosion always have created problems for earth dams. So that internal erosion or piping is known as the second causing the earth dam failure. In this study, nanoclay is used as a new additive to reduce the piping erosion of silty sand soil. For this aim, different amounts of nanoclay were added to the soil and the Hole Erosion Test (HET) was conducted. Also, effect of hydraulic gradient was investigated. The results show that erosion rate index increased more than two times by adding 1% nanoclay, that means the erodibility reduces. Erodibility of sample containing 1% nanoclay at the most hydraulic gradient was changed from very fast group to moderately slow group.
Seyed Mohammad Ali Zomorodian, Shabnam Moghispour