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RISDiscussion: Vertical Uplift Capacity of Horizontal Anchors
Publisher: American Society of Civil Engineers
Gas Permeability of Partially Hydrated Geosynthetic Clay Liners
Publisher: American Society of Civil Engineers
Abstract: A series of gas permeability tests were performed on four partially hydrated geosynthetic clay liners (GCLs) (GCL1, GCL2, GCL3, and GCL4). All GCLs consisted of essentially dry bentonite (powder or granular) sandwiched ...
In Situ Temperature Monitoring in an Organic-Waste Landfill Cell
Publisher: American Society of Civil Engineers
Abstract: This paper presents the results of a temperature-monitoring program in an organic-waste landfill cell under normal operating conditions. The aim of the program was to capture the temporal evolution of temperature at various ...
Influence of Cyclic Stress Pulse Shapes on Filtration Behavior of Railway Subballast
Publisher: American Society of Civil Engineers
Abstract: Filtration behavior of subballast materials subjected to different cyclic stress pulse shapes at frequencies of 5 Hz and 10 Hz was investigated in the laboratory. Clayey silt was used as a base soil while graded crushed ...
Numerical Characterization of Advective Gas Flow through GM/GCL Composite Liners Having a Circular Defect in the Geomembrane
Publisher: American Society of Civil Engineers
Abstract: Numerical experiments were conducted to understand the effect of geometric and transport characteristics of a geomembrane-geosynthetic clay liner (GM/GCL) composite liner on gas leakage rate through a circular defect in ...
Effect of Wet–Dry Cycles and Cation Exchange on Gas Permeability of Geosynthetic Clay Liners
Publisher: American Society of Civil Engineers
Abstract: A series of gas permeability tests were performed on a partially hydrated needle punched geosynthetic clay liner (GCL) after exposure to wet–dry cycles and ion exchange. To be able to evaluate the effect of wetting and ...
Cyclic Filtration Apparatus for Testing Subballast under Rail Track
Publisher: American Society of Civil Engineers
Abstract: An apparatus capable of testing subballast-subgrade filtration behavior under cyclic loading is presented. The apparatus can be used to accurately monitor the pressure fluctuations, permeability of the filtration system, ...
Unconfined Compressive Strength and Visualization of the Microstructure of Coarse Sand Subjected to Different Biocementation Levels
Publisher: American Society of Civil Engineers
Abstract: Biocementation processes rely on microbial-induced calcite precipitation (MICP), which is a naturally occurring biochemical process. Biocement materials are a form of environmental cementitious agents used to improve the ...
Thermohydraulic Responses of Unsaturated Sand around a Model Energy Pile
Publisher: ASCE
Abstract: This paper examines the effects of monotonic and cyclic temperature changes of a model energy pile (diameter=25 mm, length=264 mm) on the variations in temperature and volumetric water content of surrounding unsaturated ...
A Generalized Water Retention Model for Geosynthetic Clay Liners
Publisher: ASCE
Abstract: The composite nature of geosynthetic clay liners and the contrasting water retention behavior of its bentonite and geotextile components has presented a unique challenge that current water retention models do not fully ...