Abstract
Abstract Soil surface erosion has been recognized as a major threat to the sustainability of infrastructure, particularly in the context of climate change that can accelerate changes in physicochemical properties of eroding fluids. This study proposes a rotating surface erosion apparatus (RSEA) for soil erosion tests on cohesive/stabilized soils. Compared to other erosion test apparatuses, RSEA possesses some unique features: (1) it enables testing both disturbed and undisturbed in-situ soil specimens while imposing uniform hydraulic shear stress on the specimens, (2) it produces negligible temperature changes in the eroding fluid during the erosion testing, and (3) it accommodates fluids with different physicochemical properties. The computational fluid dynamics analysis was conducted to guide the design of the apparatus. The details of the design and fabrication of this apparatus are presented, followed by the discussions of the calibration and test procedure. In the end, effect of suspension on erosion testing using the proposed RSEA was discussed. Preliminary tests on cemented sands considering different temperature and acidity in eroding fluids were also performed and the results are discussed.
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