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International Concrete Abstracts Portal

Showing 1-5 of 15 Abstracts search results

Document: 

SP268

Date: 

March 1, 2010

Author(s):

Editors: Ashish Dubey and Nemkumar Banthia / Sponsored by: ACI Committee 549 and ACI Committee 544

Publication:

Symposium Papers

Volume:

268

Abstract:

This CD-ROM consists of 14 papers that were presented at ACI conventions in Charlotte, NC,and Denver, CO, in 2006. Selected examples of FRC applications highlighted in this special publication include slab-on-ground, jointless slabs, thin section composites, prefabricated modular housing elements, concrete buried structures, concrete infrastructure repair, fire-resistant concrete, decorative concrete, and shotcrete. Note: The individual papers are also available. Please click on the following link to view the papers available, or call 248.848.3800 to order. SP-268

DOI:

10.14359/51663584


Document: 

SP268-03

Date: 

March 1, 2010

Author(s):

J. Jones

Publication:

Symposium Papers

Volume:

268

Abstract:

Glass fiber-reinforced Concrete (GFRC) has now been in use worldwide for over 30 years. There are many varied applications for this composite material and this paper describes four specific applications that illustrate the benefits that GFRC offers to the construction industry.

DOI:

10.14359/51663706


Document: 

SP268-01

Date: 

March 1, 2010

Author(s):

D. M. Brodowski, M. G. Katona, and J. A. Pope

Publication:

Symposium Papers

Volume:

268

Abstract:

The current research shows that the addition of steel fibers to plain concrete is effective in enhancing the tensile ductility and loading capacity of buried concrete structures such as bridges, culverts, and vaults. This paper details the development of a steel fiber reinforced concrete (SFRC) analytical model used in the finite element program, CANDE, and describes the experimental and analytical approach used to test the accuracy of the model. The results of full-scale, in-place load tests on many precast buried SFRC arch structures (composed of less than or equal to 1% steel fibers by volume) correlated well with the CANDE model predictions. The CANDE program exhibits the ability to model the material behavior of SFRC as well as the effects of soil-structure interaction. The analytical and experimental research summarized in this paper leads to the ability to design SFRC for structural applications such as buried bridges, culverts, and vaults.

DOI:

10.14359/51663704


Document: 

SP268-05

Date: 

March 1, 2010

Author(s):

H. J. Brown, J. D. Speakman, and J. H. Morton

Publication:

Symposium Papers

Volume:

268

Abstract:

The ready-mixed industry makes up nearly 75 percent of the U.S. consumption of cement and this represents a significant market opportunity for the possible use of wood pulp fiber in ready-mixed concrete applications. Most research surrounding cellulose fiber-cement composites has focused on manufactured products such as flat and corrugated sheets for cladding and roofing, nonpressure pipes, and cable pits. Integration of cellulose fiber into the mainstream ready mix operation for value added benefits to the concrete mix is proven in practical applications as shown in this paper. Concrete properties enhanced by cellulose fiber addition are summarized. Properties of the fiber concrete composite discussed in this paper include fiber and cement matrix bond, alkaline stability, freeze-thaw durability, plastic shrinkage cracking resistance, combustibility, fire resistance and impact resistance. The paper also highlights selected project examples demonstrating the use of cellulose fibers in concrete, such as, overlays, slab on grade, and decorative concrete.

DOI:

10.14359/51663708


Document: 

SP268-14

Date: 

March 1, 2010

Author(s):

N. Ozyurt, T. O. Mason, and S. P. Shah

Publication:

Symposium Papers

Volume:

268

Abstract:

The effects of fresh state properties on the fiber dispersion characteristics of fiber-reinforced composites (FRCs) were studied by quantifying fiber segregation. Fresh state properties of concrete mixes were varied using different combinations of a plasticizing agent and viscosity modifier. A self-designed parallel-plate rheometer was used to obtain rheological parameters. Vibration was applied to the specimens and vibration times were varied to understand the effects of vibration on fiber segregation. An electrical characterization method, alternating current-impedance spectroscopy (AC-IS), was used to quantify fiber segregation in specimens. The relationship between fresh state properties and fiber segregation was evaluated.

DOI:

10.14359/51663717


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