Search
Now showing items 51-60 of 195
Integrated Hydrologic Validation of Satellite Precipitation over the United States
(2023-12-15)
Increasing precipitation extremes across the globe will naturally lead to not only increased flooding but an increase in the occurrences of flash floods, with assessment and prediction of these events becoming more critical ...
Plant uptake, time trends, and natural attenuation of selected metals in an abandoned mining district
(2011)
Soils, vegetation, and water in the abandoned Tri-State mining district are contaminated by lead, zinc, and other metals. To investigate trends in lead and zinc concentrations in the environment for past periods when little ...
Lateral deformation of bridge embankments supported on soft soils
(2020-12)
Excessive bridge embankment deformation, namely in the lateral direction, continues to damage bridges leading to costly repairs or early replacement. The lateral deformation of bridge embankments is often overlooked in ...
Development of ecological engineering solutions to mine water biogeochemistry and hydrology challenges
(2022-05)
Abandoned underground mines can cause a variety of environmental problems, including mine drainage (MD) that negatively impacts thousands of kilometers of streams worldwide. Underground mines accumulate water after pumping ...
Investigating the need for and effect of air entrainment in high performance concrete.
(2002)
The use of high performance concrete (HPC) in exterior structures has increased in recent years. Its increased strength and durability make HPC very appealing to the prestressed concrete industry, particularly in bridge ...
EXPERIMENTAL ANALYSIS FOR STEEL CONGESTION RELIEF IN CONCRETE STRUCTURES UNDER MONOTONIC AND SEISMIC LOADS
(2011)
Since the beginning of this PhD research, the author has endeavored to determine how to resolve the issues involving steel congestion in reinforced concrete (RC) structures. Three potential solutions to this problem were ...
End-Region Evaluation of Hybrid Ultra-High-Performance Concrete/Conventional Concrete Prestressed Girders
(2023-12-15)
In prestressed concrete girders, the end-regions are often susceptible to high internal forces induced by prestressing, resulting in crack propagation. Resisting these forces necessitates a substantial amount of reinforcing ...
Effects of pH, inorganic anions, and surfactants on the photocatalytic degradation of aqueous ammonia in graywater.
(2007)
Key words: Aqueous ammonia, Titanium dioxide, pH, Inorganic anions, Surfactants, Hydroxyl radicals, Graywater
Field stabilization of Ponca City shale /
(1985)
The microstructure of stabilized shale was studied using X-ray diffraction (XRD) and scanning electron microscopy (SEM) in conjunction with energy dispersive spectroscopy (EDS). The non basal (hkl) reflections in stabilized ...
DIMENSIONAL STABILITY OF CONCRETE SLABS ON GRADE
(2011)
Drying shrinkage is one of the major causes of cracking in concrete slabs on grade. The moisture difference between the top and bottom surface of the slabs causes a dimensional or "shrinkage" gradient to develop through ...