Plastic Concrete Cutoff Walls

by Jeffrey C. Evans, Bucknell Univ, Lewisburg, PA, USA,
Eric D. Stahl, Bucknell Univ, Lewisburg, PA, USA,
Eric Drooff, Bucknell Univ, Lewisburg, PA, USA,

Document Type: Proceeding Paper

Part of: Geotechnical Practice for Waste Disposal '87


The studies revealed that plastic concrete can be prepared having a coefficient of hydraulic conductivity that is less than 1 multiplied by 10** minus **7 cm/sec. The shear strength of the material is significantly greater than that of soil-bentonite or cement-bentonite, greatly reducing the potential for hydraulic fracturing. Further, based upon limited data, plastic concrete appears to offer greater resistance to degradation in response to permeation with contaminated pore fluids. Considering the advantages of plastic concrete in terms of minimizing construction defects, minimizing hydraulic fracturing potential, and offering greater resistance to degradation due to contaminants, it is concluded that plastic concrete technology should be further evaluated for vertical barriers in environmental control systems.

Subject Headings: Hydraulic fracturing | Plastics | Concrete | Core walls | Shear strength | Soil strength | Drag (fluid dynamics) | Load and resistance factor design

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