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Now showing items 21-30 of 31
Determining suction compression index of expansive soils based on non-linear suction-volumetric strain relationship
(2016-12)
Expansive soils have always been problematic in many parts of the United States and the world. This is due to the stresses they exert on buildings' foundations, pavements, and other geotechnical structures. In the United ...
Soil matric suction and active zone depth in Oklahoma
(2017-05)
Soil matric suction is an important parameter in unsaturated soils. The shrink-swell properties of expansive soils is controlled by soil matric suction. Matric suction variations cause volume change in expansive soils, ...
Investigating resistivity testing as a method for quality control of concrete mixtures
(2018-05)
Concrete is a composite material. It is a mixture of cement, sand, rocks and water. It is the second largest consumable product in the world. Unfortunately, many of the concrete structures before completing the designed ...
Use of non-destructive x-ray microscopic techniques to study fluid transport in cement-based materials
(2016-12)
Most of the urban infrastructure is made of concrete with a design service life of over 50 years. Unfortunately, many concrete structures suffer from premature deterioration due to durability issues, most commonly caused ...
Anaerobic digestion optimization for enhanced renewable biomethane production
(2011-07)
Scope and Method of Study: The scope of this research project was to operate suspended growth, continuous stirred tank reactor (CSTR) anaerobic digesters at the bench scale level to evaluate improved operation techniques/methods ...
Direct three dimensional observation of the microstructure and chemistry of C3S hydration
(2015-12)
Although portland cement has been used for over a hundred years as the binder in concrete, the basic mechanism of hydration is still not well understood. Progress has been halted for the fact that it is challenging for ...
Influence of time dependent properties and temperature effects on the performance of composite bridge girders
(2019-12)
This dissertation seeks to understand the mechanical properties of concrete, and its interaction with steel bridge girders with the purposes of deepening our understanding of the behavior of steel girder bridges made ...
Development of a new tensile stress model for expansive soils
(2015-12)
The problems associated with drying shrinkage are worldwide, and cause great damage to highways and buildings constructed on expansive soils. Literature review indicates that the development of shrinkage crack is governed ...
Impact of different curing methods and drying conditions on drying shrinkage induced curling
(2016-12)
Prolonged wet curing is thought by many to provide only improvements in concrete performance. Also, because of the large surface to volume ratio of volume change sensitive structures such as slabs on grade, differential ...
Full-field strain measurements of metal plate connections using digital image correlation technique
(2013-12)
Metal plate connections (MPC) are a very important element in the truss design industry; however, they are considered the least understood part and their design is not well understood. The complications in MPC joint modeling, ...