Theses - Geological Engineering
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Assessing the Chemical and Physical Characteristics of Aged Recycled Concrete Aggregate in Road Construction
(2018-05-31)EXECUTIVE SUMMARY The use of recycled concrete aggregates (RCA) in pavement construction applications is well established and successful, particularly its use as a granular and/or stabilized base course. However, leaching ... -
Particle Scale Dynamics of Coarse Granular Material
(2018-01-04)Developing a new wheeled or tracked vehicle for military use typically involves physical prototyping of preliminary vehicle designs and field tests to evaluate their performance in a range of conditions. Computational ... -
Rock Mechanics Laboratory Tests Relevant to the in-situ Stress Measurements at the 4850-level, Homestake Mine, Lead, South Dakota
(2018-01-03)Laboratory rock mechanics experiments were conducted on cores taken from the Sanford Underground Research Facility (SURF) (formerly of Homestake Mine) in Lead, South Dakota. Strength properties and their anisotropy were ... -
Methods for Testing the Effect of Hydraulic Gradient on the Polymer Elution of Polymer GCLs
(2018-01-03)Geosynthetic Clay Liners (GCLs) were developed in the 1980’s as an alternative landfill liner or cover material. GCLs are primarily comprised of a layer of processed sodium bentonite (Na-B), generally 7-10 mm thick, ... -
Multi-Sourced Geologic Data Integration: A Time-Based Approach
(2018-01-03)Complications in geological modeling are often made worse by the wide range of formats in which geologic data are stored. When crossing state lines, the names and interpretations of geologic formations may vary, individual ... -
District-Scale Ground Heat Exchange Performance with Fiber Optic Distributed Temperature Sensing
(2018-01-03)Chapter 1: Introduction Ground-source heat pumps (GSHP) systems have great potential as an energy-efficient alternative to conventional space heating and cooling systems. The basic principal behind GSHP technology is ... -
Assessing the Life Cycle Benefits of Recycled Material in Road Construction
(2016-10-11)Executive Summary There is interest in determining and validating the environmental and economic benefits of incorporating recycled materials into road construction using life cycle assessments (LCA) and life cycle cost ... -
Field and Laboratory Measurement of Radon Flux and Diffusion for Uranium Mill Tailings Cover Systems
(2016-10-11)Disposal Facilities for uranium mill tailings have been constructed as required by the Uranium Mine Tailing Radiation Control Act (UMTRCA) of 1978. Nearly all of these facilities rely on a low-permeability, compacted clay ... -
STATE DOT ENVIRONMENTAL AND ECONOMIC BENEFITS OF RECYCLED MATERIAL UTILIZATION IN HIGHWAY PAVEMENTS
(2016-09-30)The use of recycled materials in highway construction has the potential to achieve significant benefits affecting the triple-bottom line (environment, prosperity and society). Although state departments of transportation ... -
Residential and District-Scale Ground-Coupled Heat Pump Performance with Fiber Optic Distributed Temperature Sensing
(2015-05-17)Ground-coupled heat pumps (GCHP) have garnered considerable attention in recent years as an energy-saving alternative to conventional space heating and cooling systems, but there exists some debate about their effectiveness ... -
Leaching from Roadways Stabilized with Additive Coal Combustion Products (CCPs): Data Assessment and Synthesis
(2015-05-17)Approximately 37% of the electrical power used in the United States is generated by coal-fired power plants. Air pollution control systems installed on coal-fired power plants collect solid byproducts of coal combustion, ... -
Beneficial Use of Dredged Materials in Great Lakes Commercial Ports for Transportation Projects
(2015-04-02)1.1 . Scope This chapter briefly introduces the problems and opportunities associated with dredged material DM) management in the Great Lakes region and historical options for beneficial use of DM. The overall objective ... -
DEVELOPMENT AND ANALYSIS OF THREE APPROACHES FOR GCL DESICCATION CYCLING
(2014-08-22)Geosynthetic clay liners (GCLs) are hydraulic barriers that contain of a thin layer of Nabentonite clay encased by two geotextiles and are held together by needle-punching fibers or glue. Na-bentonite, mainly comprised ... -
MEASUREMENT AND MODELING OF THERMAL PROPERTIES OF COARSE-GRAINED SOILS
(2014-07-03)The purpose of this study is to experimentally determine and mathematically represent the thermal resistivity or thermal conductivity dry-out curves (TRDCs or TCDCs) quantifying the relation between thermal resistivity or ... -
Mechanical Behavior of Polyurethane Stabilized Fouled Ballast (PSFB)
(2014-05-18)The United State Federal Railway Administration (FRA, 2010) estimates that the demand for rail freight transportation (tonnage) will increase 88% by 2035. North American railroads spend about $3.4 billion every year on ... -
COUPLED HEAT AND MOISTURE TRANSFER IN UNSATURATED SOIL FOR THE MODELING OF SHALLOW HORIZONTAL GROUND LOOPS
(2014-01-03)INTRODUCTION In recent decades, ground-source heat pump (GSHP) systems have received considerable attention as an energy efficient technology for residential and commercial heating and cooling. Approximately 50,000 GSHP ... -
Impact of Increasing Freight Loads on Rail Infrastructure from Fracking Sand Transportation
(2014-01-03)The increased use of the hydraulic fracturing technique, used extensively in the United States, for oil and natural gas extraction, has significantly expanded the frac sand market and impacted freight rail corridors. This ... -
EVALUATING THE METHODOLOGY AND PERFORMANCE OF
(2013-08-25)Compaction of backfill in confined spaces on highway projects is often performed with small vibratory plates, based solely on the experience of the contractor, leading to inadequate compaction. As a result, the backfill ... -
Effect of Ammonium on the Hydraulic Conductivity of Geosynthetic Clay Liners and Measurement in the Exchange Complex of Bentonite
(2013-08-25)Geosynthetic clay liners (GCLs) are hydraulic barriers that consist of a thin layer (<10 mm) of sodium bentonite clay encased by geotextiles or geomembranes held together by needle punching or glue. Sodium bentonite, mainly ...
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