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Determining the Optimum Compaction Level for Designing Stone Matrix Asphalt Mixtures
(2008-09-09)
As Stone matrix asphalt (SMA) becomes more widely used in the United States, there is a need to further refine its mix design procedure. Some states have found that 100 gyrations with the Superpave Gyratory Compactor (SGC) ...
Evaluation of the Maturity Method to Estimate Concrete Strength in Field Applications
(2008-09-09)
Estimating the strength of concrete is essential to contractors and engineers to allow concrete construction operations to proceed safely and expediently. The maturity method is a technique that allows the in-place concrete ...
Verification of the Superpave Gyratory Ndesign Compaction Levels
(2008-09-09)
The original Superpave Ndesign table contained 28 levels based on a limited laboratory experiment. This was later consolidated to 4 levels based on the sensitivity of mixture volumetric properties to Ndesign; however, ...
Conditions Contributing to Poor Coagulation and Sedimentation Performance in Municipal Water Treatment
(2009-02-23)
The failure of the Auburn Water Works municipal water treatment coagulation and sedimentation process causing the plant to shut down from June 29, 1999 to July 2, 1999 was investigated. The investigation proceeded in two ...
Transferring Alabama's Smoothness Specifications from PI-based to IRI-based
(2009-02-23)
Currently, Profilograph Index (PI) is deployed as the pavement smoothness evaluation index in the Alabama DOT’s smoothness specifications. The specifications set the incentive, full and disincentive payment levels to ...
Assessment of the effects of soil amendments on the leaching of lead and arsenic from contaminated soil
(2009-02-23)
Lead has a long history in the life of human beings. Unfortunately, only recently did people start to realize that lead is a toxin. Because of increasing human activity, soil lead pollution has become a serious environmental ...
Selective Removal of As(V) from Water by Polymeric Ligand Exchange and Engineered Treatment of Spent Regenerant
(2008-09-09)
Arsenic introduced by natural or human activities into drinking water sources has been a challenging issue around the world. In the western United States, high arsenic concentrations in drinking water have caused serious ...
Laboratory Refinement of 4.75 mm Superpave Designed Asphalt Mixtures
(2008-09-09)
In 2004 a pooled fund study was initiated to refine mix design criteria for 4.75mm NMAS Superpave designed mixes and field validate design criteria. Nine states were participants in this study, Alabama, Connecticut, Florida, ...
Coupling Transport Codes with Geochemical Models
(2008-09-09)
Multi-dimensional reactive transport models are needed for understanding the fate and transport of the metal contaminants in groundwater aquifers. The goal of this research is to develop a framework for coupling the MINTEQ ...
Comparison of New Technology for Measuring Ride Quality
(2008-09-09)
Ride quality of a pavement is quantified by a statistical index. The statistical index and the profile device used to assess the index are major variables in pavement smoothness. Due to the wide range of these variables ...