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International Concrete Abstracts Portal

The International Concrete Abstracts Portal is an ACI led collaboration with leading technical organizations from within the international concrete industry and offers the most comprehensive collection of published concrete abstracts.

Showing 1-5 of 15 Abstracts search results

Document: 

SP166-14

Date: 

December 1, 1996

Author(s):

R.P. Webster, C.A. Miller, and J.J. Fontana

Publication:

Symposium Papers

Volume:

166

Abstract:

A methodology has been developed for designing precast, fiber reinforced polymer concrete (FPC) vaults to be used in underground applications. The approach used in the design was to consider the vault as a series of plates: cover, walls, and foundation slab. Each plate was subjected to loads resulting from soil pressure, live loading, and dead weight and was analyzed using classical plate theory. This approach was verified by testing two quarter-scale models of a typical vault. Upon completion of the laboratory evaluation, two vaults were designed for use as underground, natural gas regulator stations. The vaults were manufactured and subsequently placed into service by Brooklyn Union Gas Company, and the Consolidated Edison Company of New York.

DOI:

10.14359/1532

Document: 

SP166

Date: 

December 1, 1996

Author(s):

Editors: Jack J. Fontana, Al O. Kaeding, and Paul D. Krauss

Publication:

Symposium Papers

Volume:

166

Abstract:

SP-166 This volume contains 11 symposium papers that were presented at the 10th and 11th symposia that were held in Minneapolis, MN and Tarpon Springs, FL in 1993 and 1994 respectively. There were a total of four sessions, the first titled "Polymer Concrete Overlays," the second "Recent Innovations in Polymer Concrete Technology", the third and fourth "Structural Properties of Polymer Concrete, Part I and II."

DOI:

10.14359/14206

Document: 

SP166-08

Date: 

December 1, 1996

Author(s):

Lou A. Kuhlmann

Publication:

Symposium Papers

Volume:

166

Abstract:

A new family of latexes has been developed for use in portland cement that has a minimum film-formation temperature (MFFT) well above working temperature, eliminating the two major drawbacks of latex-modified mixtures: formation of a crust on the surface and difficulty in cleaning tools. Instead of coalescing to form a film, as do the typical latex modifiers for portland cement, these latex particles maintain their shape as spheres. Of the several formulations studied, two are reported here: a styrene polymer and a methyl methacrylate polymer, both carboxylated. In addition to extensive laboratory testing of both polymers, two field trials with the styrene latex formulation were conducted. These laboratory and field studies demonstrated that film formation is not necessary for latexes to contribute to the performance of portland cement mixes. The data from these studies are encouraging, but also revealed that much more work needs to be done to fully understand the capabilities and limitations of this family of latexes.

DOI:

10.14359/1399

Document: 

SP166-09

Date: 

December 1, 1996

Author(s):

Johan Silfwerbrand

Publication:

Symposium Papers

Volume:

166

Abstract:

Industrial floors of asphalt concrete or other bituminous products are deformed under sustained concentrated loads. They are also dark in color and difficult to clean. Consequently, they need to be renovated. The use of polymer-modified concrete (PMC) overlays is an interesting alternative. Reinforced and unreinforced overlays were subjected to static and rolling wheel loads. Reinforced PMC overlays on asphalt showed a high load-carrying capacity. Shrinkage tests were carried out on PMC prisms and on concrete and bituminous overlaid with PMC. A two-layer overlay with wear and leveling layers was less prone to shrinkage than an overlay solely consisting of awear layer.

DOI:

10.14359/1402

Document: 

SP166-10

Date: 

December 1, 1996

Author(s):

Carolyn Dry

Publication:

Symposium Papers

Volume:

166

Abstract:

This research concerns the release of liquid methyl methacrylate from inside of the porous fibers into hardened concrete matrices to reduce permeability. Low heat is applied to the composite. It melts the wax coating on the fibers and dries the matrix, both of which act to move the methyl methacrylate and wax out into the matrix surrounding the fiber. The heat is increased, and the monomer becomes polymerized in the dispersed state into the matrix. Research results showed reduction in matrix permeability.

DOI:

10.14359/1404

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