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International Concrete Abstracts Portal

Showing 1-5 of 12 Abstracts search results

Document: 

SP99-11

Date: 

May 1, 1987

Author(s):

N. RaaziI, D. L. Wheat, and D. W. Fowler

Publication:

Symposium Papers

Volume:

99

Abstract:

One brand of polymer concrete beams reinforced with fiberglass rods were tested and evaluated in simple flexure. Testing was carried out by the applying of two equal loads symmetrically placed about the center line of the beam on simply supported spans of 51, 63, and 72 in. The distance of the load points from the center line of the beams was varied to change the available development length for the reinforcing rod. The primary experimental data consisted of strains measured by means of electrical resistance strain gages placed on the surface of the polymer concrete and along the reinforcing rod. These strains were used to establish cracking strains and bond strengths for the beams tested. The results indicate a range of values for cracking strains and bond strengths, the lowest cracking strain being 370 psi and the lowest bond strength, 434 psi.

DOI:

10.14359/2451


Document: 

SP99

Date: 

May 1, 1987

Author(s):

Editor: David W. Fowler / Sponsored by: ACI Committee 548

Publication:

Symposium Papers

Volume:

99

Abstract:

Providing the latest advances in research, design and technology, this ACI symposium publication offers state-of-the-art information and greater insight into the latest use of polymer modified concrete and polymer concrete composites.A collection of 11 symposium papers, Polymer Modified Concrete deals exclusively with the various effects of polymers in concrete and provides an extensive source of reference. Bringing together expertise from around the world, case studies include: lightweight polymer concrete composites, polyester polymer concrete under flexural loading, flexure and bond in fiberglass-reinforced polymer concrete beams, and strength losses of polymer-modified concrete under wet conditions. Filled with illustrations, photos, and graphs, Polymer Modified Concrete provides in-depth answers to all of your questions. Note: The individual papers are also available as .pdf downloads.. Please click on the following link to view the papers available, or call 248.848.3800 to order. SP99

DOI:

10.14359/14135


Document: 

SP99-03

Date: 

May 1, 1987

Author(s):

J. J. Fontana

Publication:

Symposium Papers

Volume:

99

Abstract:

The corrosion of reinforcing steel embedded in concrete causes cracks and delamination in the concrete. The application of impressed current cathodic protection utilizing electrically conductive polymer concrete to distribute the current across concrete bridge deck surfaces is gradually becoming a standard practice in the highway industry. To protect the bridge substructures, a sprayable electrically conductive polymer concrete coating is being developed. This thin coating has a very low resistivity and can distribute the cathodic protection current across the concrete surfaces that are to be protected.

DOI:

10.14359/2369


Document: 

SP99-10

Date: 

May 1, 1987

Author(s):

S. Popovics

Publication:

Symposium Papers

Volume:

99

Abstract:

Polymer-modified concretes were subjected to four different curing methods to see the effects of various moisture conditions on their strength developments. Three epoxies and one latex were included in the investigation. One test series was prepared with each polymer and was then repeated with the addition of a chloride-free accelerator. The strength results were compared to strengths of concretes of the same composition but without polymer. The comparison shows that wet conditions do reduce the compressive strengths of polymer-modified concretes, the magnitude of which is greatly influenced by the quality of polymer used. These strength reductions, however, can be counterbalanced by a suitable accelerator.

DOI:

10.14359/2436


Document: 

SP99-05

Date: 

May 1, 1987

Author(s):

M. GierloffI and P., Schimmelwitz

Publication:

Symposium Papers

Volume:

99

Abstract:

Polymer-modified concretes have been subjected to various climate conditions over seven years to find out differences in their hardening characteristics and in particular, the influence of temperature and moisture on the development of strength and elasticity. Generally, the resistance of concrete to long-time exposure conditions is clearly improved by the investigated dispersions, regardless of their generic types. This could be recognized more by the change in the dynamic modulus than by the compression test, which may pretend sound materials while the dynamic modulus points out structural defects. To compare dynamic moduli, the content of moisture has to be taken into account. A special correlation between moisture content, density, and the change of dynamic modulus of elasticity has been given.

DOI:

10.14359/2386


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