Fiber Reinforced Lightweight Shotcrete for Patching and Retrofitting of Concrete Structures
Concrete structures may become unsatisfactory as the age of the structure increases. Corrosion of steel reinforcement, excessive deflections, and surface cracking are some causes of deterioration in concrete. One form of rehabilitation of the structure is the use of shotcrete. In the present study, a low-density structural shotcrete was developed. In order to decrease the density, cenospheres were used as the fine aggregate. Cenospheres are ceramic, hollow micro-balloons produced during coal burning processes, and have diameters ranging from 10-300 micrometers. The compressive, indirect tensile, and flexural strengths and fracture toughness of the cenosphere-modified shotcrete were determined in accordance with ASTM standards. Dynamic compression and indirect tension tests were performed by the use of a Split Hopkinson Pressure Bar. Water absorption, freezing and thawing, deicing salt resistance, and chloride permeability were tested in accordance with ASTM standards. Lastly, the cenosphere-modified shotcrete was applied to existing concrete in order to evaluate the capacity of shotcrete as an adequate method of rehabilitation.
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Corporate Authors:
University of Rhode Island, Kingston
College of Engineering
Kingston, RI United States 02881Rhode Island Department of Transportation
State Office Building, 2 Capitol Hill
Providence, RI United States 02903 -
Authors:
- Shukla, Arun
- Brown, Richard
- Ruggiero, Paul
- Publication Date: 2007-5
Language
- English
Media Info
- Media Type: Print
- Edition: Final Report
- Features: Appendices; Bibliography; Figures; References; Tables;
- Pagination: 57p
Subject/Index Terms
- TRT Terms: Concrete structures; Fiber reinforced materials; Fine aggregates; Lightweight aggregates; Mechanical properties; Patching; Physical properties; Rehabilitation; Retrofitting; Shotcrete
- Uncontrolled Terms: Cenospheres
- Subject Areas: Highways; Maintenance and Preservation; I60: Maintenance;
Filing Info
- Accession Number: 01088831
- Record Type: Publication
- Report/Paper Numbers: RIDOT-RTD-03-3
- Contract Numbers: SPR-2(28)-2272
- Files: TRIS, STATEDOT
- Created Date: Feb 25 2008 2:36PM