CPT Indexing of In Situ OCR in Clays
Cone penetration tests may be used to index the in situ preconsolidation pressure in clay deposits. A specified relationship between C//u/ sigma //vo and the overconsolidation ratio (OCR)...
A Field Study of Water Movement Through Clay Liners
A monitoring system has been designed for the field verification of a numerical model of water movement through the cover clay liner of hazardous waste landfills. The most unique aspect...
Decreasing Clay's Permeability Using Aluminum Salts
The permeabilities of montmorillonite and kaolinite clays were reduced by precipitating aluminum hydroxide in the pores of the clay. The precipitate was formed by permeating the clays...
Clay Liner Hydraulic Conductivity: Comparison of Field & Laboratory Tests
Clay liner hydraulic conductivities at three hazardous waste landfill cells in Oklahoma and Utah were measured in the laboratory and in the field during construction. Prior to construction...
Clay Liner/Leachate Compatibility Modeling
Over the past several years, the results of many laboratory studies assessing the effect of various combinations of organic and inorganic chemical mixtures on the hydraulic conductivity...
Porewater Pressure in Clays Below Caisson Islands
Unfrozen lightly overconsolidated clays are a significant factor in the design and performance of exploration caisson retained islands in the Canadian Beaufort Sea. At two sites (Tarsiut...
Geotechnical Behavior of Underreams in Pleistocene Clay
Enlarged bases are often constructed in cylindrical drilled-and-cast-in-situ foundation elements (footings, bored piles) to increase their capacity. Enlarged bases that are cut mechanically...
Containment of Textile Waste Using a Geomembrane
A wastewater treatment plant for a textile mill incorporated two 2. 7 million gallon aeration ponds which had originally been lined with clay. The clay liner leaked and caused the formation...
Can Clay Liners Work?
Nearly all liners for landfills and surface impoundments were constructed from compacted clay until about five years ago. But this is no longer so. In the past few years, clay liners used...
Effect of Subsurface Drainage in the Lower Mississippi Valley on Surface Water Quality
Sediment and nutrient losses were measured from a subsurface drainage-runoff-erosion experiment for the years 1981 to 1984. The experiment, located near Baton Rouge, Louisiana, consisted...
Clay Pipe Installation?Advances in Load Factors
This report presents an evaluation of traditional load factor values for clay pipe and the development of a new bedding system which gives a higher load factor. Tests demonstrate that...
The Evolution of Jointing Vitrified Clay Pipe
Advances made in the jointing of vitrified clay pipe during the last half century, illustrate the concern of the clay pipe industry to provide top quality jointing methods. Early 19th...
Investigations into the Structural Performance of Clay Pipes
Over the past 8 years, the Clay Pipe Development Association (CPDA) has commissioned non-destructive physical testing of vitrified clay pipelines. The diameters of the pipes have varied...
Durability of Clay Pipe
Clay pipe, manufactured in accordance with ASTM C-700, has unusual resistance to attack by chemical agents. The pipe is highly stable in hydrochloric and sulfuric acid and subject to corrosive...
Aggregation and Consolidation of Phosphatic Clays
The consolidation behavior of aggregated phosphatic clays has been investigated using a bench scale centrifuge. It was determined that aggregation of the clays with phosphogypsum, a waste...
Turbidity Control Measures Associated with Reclamation of an Abandoned Phosphatic Waste Clay Pond
Area 3A in the Tenoroc State Reserve near Lakeland, Florida is an inactive and abandoned phosphatic waste clay area. The disposal area has been inactive for several years and the clays...
A Numerical Model of Water Movement Through Clay Liners
Regulations controlling landfill design typically specify design details such as a minimum liner thickness, maximum permeability of required gradation curves for the clay liner material....
Incorporating 3-D Effects into a 2-D Model
Some three-dimensional (3-D) effects may be incorporated into vertically averaged two-dimensional models. This is demonstrated with a case study where the effects of a complex system of...
Type C Fly Ash and Clay Stabilization
Because the soils onsite have a high swell potential, a 37 foot high retaining wall was designed with counterforts and was supported by pier foundations to limestone. In order to reduce...
Uplift Capacity of Helical Anchors in Clay and Silt
The results of a study on the uplift capacity of helical anchors in clay and silt are presented. Full-scale field tests and one-quarter scale laboratory tests were conducted in each soil...
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