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Home > Publications > 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:
SP69-01
Date:
August 1, 1981
Author(s):
John A. Manson
Publication:
Symposium Papers
Volume:
69
Abstract:
As we have become more and more concerned with the con-servation of energy and materials, interest has grown in improv-ing the strength, toughness, ductility, and durability of port-land cement concrete or in finding replacements that exhibit a superior cost-property balance. Thus one approach has been to im-prove the properties of concrete itself; another-the subject of this paper-is to combine the two technologies of concrete and high polymers, using not only familiar kinds of concrete but also less familiar ones. It should be noted that combinations of siliceous materials with polymers require in many cases lower energy inputs per unit of performance than either component alone. The purpose of this paper is to provide an overview of current re-search and unsolved problems with the various classes of polymer-concrete materials. While a comprehensive review of the litera-ture is not within the scope of the paper, the general state-of-the- art is described, principal areas of research are illustrated with typical examples, and areas needing further research are suggested. Indeed, significant progress has been made recently in both fun-damental and applied research on all kinds of polymer/concrete systems. It is suggested that further progress to achieve sophisticated understanding, design, and materials selection will still require much work in combining the science, technology, and economics involved.
DOI:
10.14359/6376
SP69-08
L. A. Kuhlmann
Latex modified overlays have been in service for over 20 years. This report summarizes the significant events during the development of this system and highlights data that have recently been generated by State Highway Departments and the FHWA in their continuing studies of field performance. Fifteen reports, covering 184 bridge decks, aged two months to 13 years, are reviewed. Specific comments regarding test methods, such as chloride pen-etration and half-cell potential, to measure performance, are included. Life expectancy, based on the testing done to date, as well as the actual life in the field, is projected to be a minimum of 15-20 years.
10.14359/6383
SP69-03
John M. Scanlon, Jr.
Concrete polymer materials are a series of composite materials which have strength and durability characteristics far superior to those of portland cement concrete. In the USA, a number of hydrotechnical rehabilitation projects have used polymer impregnated concrete (PIC) in order to repair cavitated or eroded stilling basins. Examples of these projects are Dworshak Dam and Libby Dam. Although both of these projects used polymer-impregnated fiber-reinforced concrete, indi-cations are that the fibers do not increase the resistance of the concrete to normal erosion. It is reasonable to assume that the fibers may help to resist cavitation forces since fibers increase the tensile strength of the PIC. Epoxy resins have been used for many years and if applied correctly, results have been found to be excellent when used in the repair of hydraulic structures. In 1977, the Water and Power Resources Service (formerly the Bureau of Reclamation) used polymer concrete (PC) containing vinyl ester in test repairs on two concrete drop structures on the Madera Canal, Central Arizona Project, in California, where erosion dam-age resulting from abrasive sediments carried by flowing water was evident. In the USSR, much experimental work is being performed on new hydrotechnical structures; precast PC and PIC slabs are being used in high velocity water and sediment passages. With the help of the construction industry, new inexpen-sive techniques could be developed; and concrete polymers could become the construction material of the near future.
10.14359/6378
SP69-11
R. E. Weyers, P. D. Cad, P. R. Blankenhorn, and L. R. Stover
Polymer impregnated concrete (PIC) was overlaid with a low slump dense concrete (LSDC) or a latex modified concrete (LMC). Flexure strength, compressive strength, and freeze-thaw durability data were obtained on the composite specimens. Flexural data indicated a strong bond was established between LSDC, LMC, and PIC. Compressive strength data indicated the bond was weaker for the LMC than the LSDC. Freeze-thaw data showed that a durable bond was established between the PIC and the LSDC whereas the bond failed between the PIC and the LMC.
10.14359/6386
SP69-10
Samuel H. Christie III, Roland R. McClain, and James H. Melloan
An epoxy resin system has been developed for modificat-ion of concrete providing handling and performance advantages over other polymer types. Description of two applications are pro-vided. Estimated costs of applied epoxy modified concrete are presented.
10.14359/6385
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