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- Accelerated bridge construction (1)
- Asphalt binder (1)
- Asphalt mix (1)
- Binder bond strength (1)
- Buckling restrained reinforcement (1)
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- Innovative connection (1)
- Interlayer Shear Strength (1)
- Louisiana Interlayer Shear Strength Tester (1)
- Mechanical bar splices (1)
- Moisture-induced damage (1)
- Pavement Bond Strength (1)
- Pushover analysis (1)
- Rigid length factor (1)
- Seismic performance (1)
- Strain energy (1)
- Tack Coat (1)
- Tensile strength (1)
Articles 1 - 6 of 6
Full-Text Articles in Engineering
Mechanical Bar Splices For Accelerated Construction Of Bridge Columns, Puskar Kumar Dahal
Mechanical Bar Splices For Accelerated Construction Of Bridge Columns, Puskar Kumar Dahal
Electronic Theses and Dissertations
Mechanical bar splicing is an alternative method of connecting reinforcing bars in concrete structures compared to conventional lap splicing mainly to reduce bar congestion in joints. Recently, mechanical bar splices, which are also referred to as bar couplers, have been used to connect precast members to accelerate construction of concrete bridges and buildings. Current codes prohibit the use of couplers in the plastic hinge regions of bridge columns in high seismic zones. This may be because of a lack of systematic test data on the coupler performance, limited experimental studies on mechanically spliced bridge columns, and an engineering precaution. The …
Evaluation Of The Moisture-Induced Damage Potential Of Asphalt Mixes And Asphalt Binder-Aggregate Systems, Rajan Acharya
Evaluation Of The Moisture-Induced Damage Potential Of Asphalt Mixes And Asphalt Binder-Aggregate Systems, Rajan Acharya
Electronic Theses and Dissertations
The current thesis presents the findings of a study conducted on asphalt mixes to evaluate their moisture-induced damage potential through testing of the plant produced asphalt mixes in South Dakota using local aggregates and commonly used asphalt binders. The moisture-induced damage potentials of the asphalt mixes were evaluated by conducting tensile strength ratio (TSR) and modified Semicircular Bend (SCB) tests. The effect of moisture on asphalt binder-aggregate adhesion was evaluated by conducting binder bond strength (BBS) test on binder-aggregate systems. The asphalt mixes tested in this study included a hot mix asphalt (HMA) containing hydrated lime (1% by the weight …
Repairable Precast Buildings And Bridges, Abdullah Boudaqa
Repairable Precast Buildings And Bridges, Abdullah Boudaqa
Electronic Theses and Dissertations
A new moment-resisting precast connection is developed in the present work through experimental and analytical studies to accelerate construction of bridges and buildings, to improve their seismic performance, and to quickly repair them through replacement of exposed reinforcement. The new precast joint detailing incorporates (1) detachable external reinforcing steel bars restrained against buckling, which is referred to as buckling restrained reinforcement (BRR), to develop plastic bending moments, (2) a steel pipe connecting the precast members through a pin connection to resist plastic shear forces, and (3) detachable mechanical bar splices to assemble and disassemble BRR at any time specifically after …
Laboratory Evaluation Of Internal And External Nutrient Removal To Control Algal Bloom In Eutrophic Lakes, Sepideh Sadeghi
Laboratory Evaluation Of Internal And External Nutrient Removal To Control Algal Bloom In Eutrophic Lakes, Sepideh Sadeghi
Electronic Theses and Dissertations
Eutrophication is one of the most widespread water quality problems in lakes and reservoirs. Frequent cyanobacterial blooms resulting from eutrophication can greatly damage aquatic ecosystems and pose a high risk to human health. Phosphorus (P) and nitrogen (N) are the major causes for eutrophic conditions and can enter to the aquatic ecosystem via different sources. The combination of phosphorus precipitation and sediment capping are promising technologies to minimize internal P loading and control harmful algal blooms in eutrophic lakes. Denitrification bioreactors have emerged as an important edge-of-field treatment technology to reduce nitrate-nitrogen loads from external sources. The objective of this …
Compaction Testing Of Granular Material, Jason Jerome Weber
Compaction Testing Of Granular Material, Jason Jerome Weber
Electronic Theses and Dissertations
The South Dakota Department of Transportation SDDOT uses the Ohio Highway Department’s Typical Moisture Density Curves for preforming compaction quality control on granular soil materials in junction with standard moisture density relations. The SDDOT also uses the Nuclear Density Gauge NDG, Sand Cone, and Rubber Balloon methods to conduct in-situ density tests. Compaction quality control of recycled pavements is conducted using test strips. The test strip method works well for large areas but becomes problematic for small areas. The ODOT Materials Manual states “Moisture-Density proctor curves and controls were originally developed to be used on cohesive (clays and silts) soils. …
Evaluation Of The Effect Of Tack Coat Type, Application Rate, And Surface Type On Interlayer Shear Strength, Chamika Prashan Dharmarathna
Evaluation Of The Effect Of Tack Coat Type, Application Rate, And Surface Type On Interlayer Shear Strength, Chamika Prashan Dharmarathna
Electronic Theses and Dissertations
Tack coat is an asphaltic material applied between asphalt pavement layers. Since pavement is a multilayered structure, it is highly important to make proper bond between the layers to achieve a monolithic behavior. Hence, inadequate bond due to application of inadequate amount of tack coat may lead to poor structural behavior and premature failure. Also, applying excessive amount of tack coat may lead to layer slippage and binder migration. Therefore, it is highly important to apply an optimum amount of tack coat between layers. Over the past decades several studies have been conducted to determine the optimum tack coat application …