A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Design and Performance of Self-Consolidating Concrete for Connecting Precast Concrete Deck Panels and Bridge I-Girders
Existing Full-depth recast concrete deck systems use either open channels of pockets to accommodate the shear connectors of supporting girders for achieving composite systems. The use of open channels or pockets requires cast-in-place concrete/grout to fill these channels/pockets and their speed of construction, which are the expected benefits of using precast concrete deck system. Recent developments in full-depth precast concrete deck systems include using convered individual pockets at large spacing to simplify construction and eliminate the need for deck overlays to cover exposed surfaces. This requires flowable concrete/bout to completely fill deck pockets and gaps between the precast concrete deck panels and bridge girders (i.e. Haunches). The high cost of commercial grouts and their strict requirements of surfaces preparation and application procedures reduce the constructability and cost-effectiveness of precast concrete deck systems. The objective of this project is to investigate the constructability of using self-consolidating concrete (SCC) to fill the gap between precast concrete deck panels and bridge girders as well as covered deck pockets. This included developing SCC mixture(s) with specific requirement in terms of flowability, passing ability, stability, workability retention, and pumpability and evaluating the performance of these novel construction materials In small-scale and full-scale specimens. Sequence of pouring/pumping SCC as well as its quality control and quality assurance procedures are also determined. This experimental investigation is crucial for the success of the new generation of full-depth precast concrete deck systems and improving its competitiveness against cast-in-place deck systems.
Design and Performance of Self-Consolidating Concrete for Connecting Precast Concrete Deck Panels and Bridge I-Girders
Existing Full-depth recast concrete deck systems use either open channels of pockets to accommodate the shear connectors of supporting girders for achieving composite systems. The use of open channels or pockets requires cast-in-place concrete/grout to fill these channels/pockets and their speed of construction, which are the expected benefits of using precast concrete deck system. Recent developments in full-depth precast concrete deck systems include using convered individual pockets at large spacing to simplify construction and eliminate the need for deck overlays to cover exposed surfaces. This requires flowable concrete/bout to completely fill deck pockets and gaps between the precast concrete deck panels and bridge girders (i.e. Haunches). The high cost of commercial grouts and their strict requirements of surfaces preparation and application procedures reduce the constructability and cost-effectiveness of precast concrete deck systems. The objective of this project is to investigate the constructability of using self-consolidating concrete (SCC) to fill the gap between precast concrete deck panels and bridge girders as well as covered deck pockets. This included developing SCC mixture(s) with specific requirement in terms of flowability, passing ability, stability, workability retention, and pumpability and evaluating the performance of these novel construction materials In small-scale and full-scale specimens. Sequence of pouring/pumping SCC as well as its quality control and quality assurance procedures are also determined. This experimental investigation is crucial for the success of the new generation of full-depth precast concrete deck systems and improving its competitiveness against cast-in-place deck systems.
Design and Performance of Self-Consolidating Concrete for Connecting Precast Concrete Deck Panels and Bridge I-Girders
G Morcous (author) / H.K Khayat (author)
2014
130 pages
Report
No indication
English
Highway Engineering , Construction Equipment, Materials, & Supplies , Civil Engineering , Construction Management & Techniques , Structural Analyses , Construction Materials, Components, & Equipment , Nondestructive Testing , Bridge decks , Renovating , Expansion joints , Precast concrete , Transverse joints , Composite structures , Finite element analysis , Flexural strength , Cracking(Fracturing) , Loads(Force) , Shear properties , Bridge(Structures) , Bridge replacement , Bridge design , Pre-stressed concrete , Structural analysis , Bridge tests , Evaluation , Panels , Self-Consolidating Concrete(SCC)
| British Library Online Contents | 2016