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Now showing items 21-30 of 291
Optimization and economics of small-scale, on-farm biodiesel production using oilseed crops and waste vegetable oil
(2011-05-25)
Recent concerns over unpredictable fuel prices and desire to reduce farm input costs have warranted producer interest in growing alternative crops for the production of biofuels such as biodiesel. Ideally, biodiesel could ...
Humic Acids Resistant Gene Quantification Assay in Soils
(2011-05-17)
Humic acids are the most commonly reported group of inhibitors in environmental samples. Due to the ubiquity and abundance of humic acids in the environment, they are often co-extracted along with the nucleic acids and ...
Finite Element Simulation and Assessment of Single-Degree-of-Freedom Prediction Methodology for Insulated Concrete Sandwich Panels Subjected to Blast Loads
(2011-01-05)
This report discusses simulation methodologies used to analyze large deflection static and dynamic behavior of foam-insulated concrete sandwich wall panels. Both conventionally reinforced cast-on-site panels and ...
Assessment of Stability Test Methods for Self-Consolidating Concrete
(2011-04-01)
Self-consolidating concrete (SCC) is a highly fluid, nonsegregating concrete that can spread through reinforcement and completely fill formwork without the use of mechanical consolidation. Resistance to segregation, also ...
Influence of the LRFD Bridge Design Specifications on Seismic Design in Alabama
(2011-04-01)
The Alabama Department of Transportation (ALDOT) is in the process of transitioning from the AASHTO Standard Specification for Highway Bridges to the LRFD Bridge Design Specifications. One significant difference between ...
Evaluation of Non-Solvent Methods to Characterize Reclaimed Asphalt Pavement Binder
(2011-08-17)
Increases in material costs have led many agencies to consider allowing higher percentages of reclaimed asphalt pavement (RAP) in asphalt mixes. However, as RAP percentages increase, the stiffness of the overall mix is ...
Sorption of Thorium Onto Subsurface Geomedia
(2011-11-17)
Radionuclide contamination has been a significant environmental problem at US Department of Energy (USDOE) sites for many years. In addition, a final disposal solution for radioactive waste, such as deep geological ...
Characterization of the Behavior of High Volume Fly Ash Concrete
(2011-08-11)
Fly ash is commonly used as a supplementary cementitious material (SCM) in the production of portland cement concrete. Concrete produced with high fly ash replacement levels is considered high volume fly ash (HVFA) concrete. ...
Development of Guidance for Runoff Coefficient Selection and Modified Rational Unit Hydrograph Method for Hydrologic Design
(2012-05-07)
The rational method is the most widely used method by hydraulic and drainage engineers to estimate design discharges. The runoff coefficient (C) is a key parameter for the rational method. Literature-based C values (Clit) ...
Characterization of Multi-Phase Performance-Based Passive Control Systems
(2011-10-27)
Typical passive control devices have inherent strengths and weaknesses as seismic protection systems. A Multi-phase Passive Control System (MPCS) combines two types of passive control devices in a system in order to offset ...