An experimental study of horizontal barrier formation and containment of NAPLs by gelling liquids

Due to the character of the original source materials and the nature of batch digitization, quality control issues may be present in this document. Please report any quality issues you encounter to digital@library.tamu.edu, referencing the URI of the item.Includes bibliographical references: p. 27-29.Issued also on microfiche from Lange Micrographics.A number of experimental laboratory studies on grouting technologies have been reported in the literature. However, most of these studies are not applicable to subsurface barrier containment of nonaqueous phase liquids (NAPLS) such as trichloroethylene (TCE) or gasoline. Also, vertical barriers have been studied more than horizontal barriers in the subsurface barrier technology. Due to the need for horizontal barrier formation studies, experiments to form a contiguous horizontal layer by injecting gelling liquids through horizontal and vertical pipes will be conducted in this study. Before the barrier formation in the two-dimensional studies, pre-and post-injection hydraulic conductivity measurements to quantify hydraulic conductivity reductions will be carried out in the one-dimensional columns. After an impervious layer is produced, durability of the grouted porous media in the presence of typical contaminants will be investigated. The proposed research aims at the testing of techniques to emplace gelling liquids in subsurface environments to form horizontal barriers to isolate the downward migration of NAPLS