HIGH-STRENGTH FIBER REINFORCED CONCRETE UTILIZING CLOSELY SPACED REINFORCING BARS
CRC (Compact Reinforced Composite) is the designation for a special type of fiber reinforced concrete with high strength (150-400 MPa) and closely spaced reinforcing bars. The dense matrix - with water/powder ratios of typically 0.16 - provide a good bond to fibers and reinforcing bars and the large content of steel fibers provide the ductility necessary for utilizing reinforcement effectively. The steel fiber content is typically 2-6% by volume and the content of reinforcing steel is 2-10% by volume. The improved durability of the matrix - due to a high micro silica content - makes it possible to use a concrete cover to the reinforcement of only 10 mm in aggressive environments, i,proving the effectiveness of the reinforcement. The CRC concept was developed in 1986 and aimed specifically for use in structures such as beams, columns and joints, but most of the applications so far have been in the security industry, for corrosion protection and in heavily loaded floors. However, in the last few years CRC has also been applied in structures. One of these applications, production of 40,000 drain covers for a tunnel as a replacement for cast-iron covers, is described as an example of a project where the properties of high performance fiber reinforced concrete were utilized.
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Corporate Authors:
American Concrete Institute (ACI)
38800 Country Club Drive
Farmington Hills, MI United States 48331 -
Authors:
- Aarup, B
- Publication Date: 1999
Language
- English
Media Info
- Features: Figures; References; Tables;
- Pagination: p. 1-8
- Monograph Title: STRUCTURAL APPLICATIONS OF FIBER REINFORCED CONCRETE
Subject/Index Terms
- TRT Terms: Fiber reinforced concrete; High strength concrete; Precast concrete; Reinforcing bars; Research projects; Structural design
- Subject Areas: Highways; Materials; Research; I32: Concrete;
Filing Info
- Accession Number: 00765172
- Record Type: Publication
- Files: TRIS
- Created Date: Jun 8 1999 12:00AM