Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 36 for “"Concrete--Cracking"”.
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Displacement rate and temperature effect on asphalt concrete cracking potential
One of the major distresses of asphalt concrete (AC) in flexible pavements is thermal cracking alongside fatigue, weathering related cracking and rutting. Pavements in Illinois road network are highly prone to different sources of cracking because of the climatic conditions and heavy traffic loads. …
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Critical literature review on concrete crack repairs
… focuses on an in-depth review of literature on concrete crack repairs. Deterioration of concrete affects both the aesthetics and the integrity of structures. As a result, there is need to repair such defects in order to restore the aesthetics and the integrity of concrete structures. This …
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Concrete crack width under combined reinforcement corrosion and applied load
For reinforced concrete structures subjected to chlorides, carbon dioxide laden and other aggressive environments, corrosion of the reinforcing steel is seen as a global problem. Maintenance and repairs resulting primarily from premature concrete cracking and spalling have an estimated cost running …
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Fracture Tests for Bituminous-Aggregate Mixtures: Laboratory and Field Investigations
… of premature pavement deterioration has been the cracking of the asphalt materials. This study investigates the ability to apply fracture mechanics principles to study asphalt concrete cracking through experimental techniques. Single-edge notched beam (SE(B)) and disk-shaped compact tension …
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Characterization of Concrete Pavement Joint Surfaces
In many concrete structures especially pavements, the ability to transfer shear load across crack/joint and the cracking resistance are important. This research was conducted in order to develop a testing method and roughness parameter that could better predict the shear load transfer across …
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Assessment of FRP-confined concrete : understanding behavior and issues in nondestructive evaluation using radar
… materials for strengthening and retrofitting of concrete columns and bridge piers has urged the development of' an effective non-destructive evaluation (NDE) methodology. Radar technologies have shown great potential for assessing the structural and material integrity of FRP-confined concrete …
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Optimization of Concrete Mixtures for Use in Structural Elements
<p>Portland cement is an essential ingredient in concrete. The use of cement is to enhance the strength as well as other hardened properties of concrete mixtures. Determining the accurate amount of cement is important because the required strength may not be achieved if not enough cement is used. …
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Bond strength history in prestressed concrete reactor vessels
… to study bond strength history in Prestressed Concrete Reactor Vessels (PCRV) which house the Advanced Gas-cooled Reactors. Three-dimensional non-linear analytical model has been developed in which the effect of bond is included. A finite element computer program is written in which solid, …
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Heat of Hydration Thermal Performance and Flexural Capacity of Stainless-Steel Reinforced Concrete Sections
… of thermal expansion is different from that of concrete. This difference raises concerns about the potential for concrete cracking during the hydration process. To address this concern, a thermal-structural finite element model was developed to predict the stresses in SS reinforced concrete (RC) …
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Study of Internal Strains Developed in Concrete Decks at Early Ages in Steel Continuous Bridges
… (ARDOT) has identified bridge deck cracking shortly after concrete decks are placed and prior to applying traffic loads. Previous researchers have confirmed improper construction practices and design methods can lead to deck cracking. Currently, many contractors throughout Arkansas …
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Automated Characterization of Bridge Deck Distress Using Pattern Recognition Analysis of Ground Penetrating Radar Data
… the condition of bridges in the United States. Concrete bridge deck inspection and evaluation presents one of the largest problems. The deterioration of these concrete decks progresses more rapidly than any other bridge component, which leads to early concrete deck replacements that must be done …
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Numerically Modeling Steel Continuous Bridges for Early Age Concrete Deck Cracking
<p>Early age bridge deck cracking is a common problem throughout the United States. Early age cracking develops shortly after the deck is poured. It reduces the serviceability and lifespan of bridges. Early age cracking can be typically attributed to either of two factors, 1) construction …
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GFRP reinforced concrete : environmental and movement characteristics
… the problem of corrosion in steel reinforced concrete. Consequently, methods such as cathodic protection, epoxy coatings, concrete additives, etc., have been tried. Unfortunately, non of these methods has totally solved the corrosion problem. The outstanding characteristics of fibre reinforced …
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An investigation into the behaviour of hollow ribbed (waffle) rectangular reinforced concrete slabs at ultimate limit state
… elastic to ultimate load behaviour of reinforced concrete waffle slabs subjected to uniformly distributed load and 4-point loads are reported in this thesis. A total of twenty 1/4- and one 1/2-scale reinforced concrete waffle model slabs, with different area of steel and rib depth to slab …
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The fatigue performance assessment of corrosion damaged RC beams, patch repaired and externally strengthened using CFRP
… (CFRP) which were externally bonded onto concrete beams as a repair and strengthening technique for internally corrosion damaged RC beams. It was identified that more research concerning the fatigue performance of externally bonded CFRP laminates used as a composite material for originally …
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Textile fine grined mortar containing palm oil fuel ash as a partial cement replacement for flexural strengthening on reinforced concrete beams
Reinforced concrete (RC) beams represents a large percentage of the structure in buildings. As the beams structures known as bending elements, thus most of the structures are often exposed to bending loads, which can affect in serious deteriorations such as concrete cracking and spalling. Due to …
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Inelastic Dynamic Behavior And Design Of Hybrid Coupled Wall Systems
… beams are used to couple two or more reinforced concrete shear walls in series, can be designed to have these attributes and therefore have the potential to deliver good performance under severe seismic loading. This research presents an investigation of the seismic behavior of this type of …
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Laminar cracking in post-tensioned concrete nuclear containment buildings
… the long-term integrity of post-tensioned concrete containment buildings (PCCs) is necessary for continued operation of the reactors they house. In 2009, during preparations for a steam generator replacement, extensive subsurface laminar cracking was identified in a portion of the Crystal …
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Implementation of an Open-Source Digital Image Correlation Software for Structural Testing
… second stage included pure compression tests on concrete cubes and concrete cylinders to compare the difference in results between: (i) surface curvature, (ii) camera distance, (iii) surface treatment, and (iv) speckle pattern color. The final stage involved analysis of a tension test of a …
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Corrosion performance of coated steel bars in cracked and uncracked reinforced concrete beams
… for its ability to provide enhanced bonding to concrete thereby reducing cracking within transportation bridge deck systems. It aims to improve upon conventional smooth epoxy-coated reinforcing bar (ECR) by providing a multi-layered thicker and texturized coating. Where the texturized surface …
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