Evaluating the Non-Erodible Cement-Bentonite Barrier Material Samples via Hole Erosion Test Apparatus

Abstract Because of the damage that dams, levees, and other water-retaining structures cause, their failure has long been a source concern. Despite limitations testing apparatus (e.g., HET) used to study barrier material erodibility, they are still widely used. In previous studies, there was very little discussion hydraulic parameters fluid pressure, flow rate, etc.) obtained from HET test, particularly how relate varying eroded hole. Therefore, purpose this paper look into aspect relationship as well practical aspects must be considered. Fluctuations in pressure rate data collected during were primary issue discovered. The noise pump machinery caused fluctuate within specific range, but fluctuations controlled consistent. Throughout recorded fluctuated ± 10 kPa below target while approximately 0.3 L/min. test performed on smooth-surfaced, uniform-diameter hole; however, is not always case for holes samples. non-uniform surface can affect friction between eroding fluid, which turn affects loss across erosion pipe. A non-invasive measurement method determining diameter an hole suggested future research, provided empirical difference, diameter. limitations, results overview expected fluctuation range parameters.