Please use this identifier to cite or link to this item:
Title: Laboratory evaluation of Aquablok™ erosion resistance : implications for geotechnical applications
Authors: Priestas, Anthony M.
Hull, John H.
Ellis, Reed.
McKenzie, Charles F.
Gailani, Joseph Z.
Keywords: Earth dams--Erosion
Earth dams--Maintenance and repair
Levees--Maintenance and repair
Publisher: Coastal and Hydraulics Laboratory (U.S.)
Engineer Research and Development Center (U.S.)
Series/Report no.: Special Report (Engineer Research and Development Center (U.S.)) ; no. ERDC/CHL SR-20-3
Abstract: AquaBlok™ (AB) is a commercial product traditionally used as an alternative material for contaminated sediment capping applications. Previous studies of AB capping performance have reported enhanced stabilization through increased erosion resistance. Subsequently, AB has been considered for use as an alternative levee repair material due to its cohesive properties. Through a series of laboratory experiments, this study investigated the erosion behavior of new AquaBlok formulations (10%, 20%, and 30% clay by weight) under increased shear stresses previously unachievable in the previous tests. The new AquaBlok formulations were tested in non-compacted and compacted states to simulate the physical properties in capping and levee repair applications. In the non-compacted state, excess hydration of the clay matrix extended approximately 5 cm below the bed surface, which greatly reduced erosion resistance and was independent of clay percentage. Below this horizon, critical shear stress increased, and erosion rates decreased, with clay percentage, respectively. However, this does not consider a continuous change in hydration state when exposed to free water. In the compacted state, erosion rates were greatly arrested, with measureable erosion only possible under the maximum applied shear stress (24 Pa). The results are discussed in the context of capping and levee applications.
Description: Special Report
Gov't Doc #: ERDC/CHL SR-20-3
Rights: Approved for Public Release; Distribution is Unlimited
Size: 65 pages / 5.96 MB
Types of Materials: PDF
Appears in Collections:Special Report

Files in This Item:
File Description SizeFormat 
ERDC-CHL SR-20-3.pdf5.96 MBAdobe PDFThumbnail