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Title:

Fiber Reinforced Lightweight Shotcrete for Patching and Retrofitting of Concrete Structures

Accession Number:

01088831

Record Type:

Monograph

Availability:

National Technical Information Service

5301 Shawnee Road
Alexandria, VA 22312 USA

Abstract:

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.

Report Numbers:

RIDOT-RTD-03-3

Contract Numbers:

SPR-2(28)-2272

Language:

English

Corporate Authors:

University of Rhode Island, Kingston

College of Engineering
Kingston, RI 02881 USA

Rhode Island Department of Transportation

State Office Building, 2 Capitol Hill
Providence, RI 02903 USA

Authors:

Shukla, Arun
Brown, Richard
Ruggiero, Paul

Pagination:

57p

Publication Date:

2007-5

Edition:

Final Report

Media Type:

Print

Features:

Appendices (1) ; Bibliography; Figures; References; Tables

Uncontrolled Terms:

Subject Areas:

Highways; Maintenance and Preservation; I60: Maintenance

Files:

TRIS, STATEDOT

Last Modified:

Feb 25 2008 2:36PM