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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 8 Abstracts search results
Document:
SP137-04
Date:
June 1, 1993
Author(s):
H. H. Weber, Jr..
Publication:
Symposium Papers
Volume:
137
Abstract:
There is a growing interest in rapid-setting and high-strength materials of construction that can also reduce the rising costs of maintenance and improve productivity. The Sulphur Institute, in cooperation with the Bureau of Mines and a small group of dedicated construction contractors, has encouraged research and development activities to devise new and advanced sulfur construction materials. Sulfur polymer cement concrete (SC) is used in hostile chemical environments where corrosion due to acid and/or salt exposure results in failure of such conventional materials as portland cement concrete. SC is also finding valuable uses in other applications. SC is gaining recognition in the increasing market for corrosion-resistant materials. Examples of construction and maintenance projects utilizing SC are described for chemical environments encountered during production of sulfuric acid, ammonium sulfate, phosphoric acid, potash, and other fertilizer materials, and compared with the performance of conventional construction materials. SC materials show no signs of deterioration due to acid and salt corrosion after approximately 9 years of industrial testing. New and expanding applications for SC are also explored. In addition to the summary of industrial projects, newly developed construction equipment, SC precast production, and other new and innovative applications are presented. 140-393
DOI:
10.14359/4067
SP137-01
M. Kawakami, H. Tokuda, M. Kagaya, and R. Nasu
Reinforced concrete pipe used as sewer pipe is required to have excellent durability, especially chemical resistance, in addition to high strength and good economy. A precast composite pipe, in which a reinforced concrete pipe is lined with polymer mortar as soon as centrifugal compaction and drainage have been completed, was developed and investigated. Chemical resistance of the polymer mortar exposed to acidic and alkaline water was studied first by immersion tests and manufacturing process of the composite pipe was introduced next. Subsequently, load tests were carried out and elastic behavior, cracking, and breakable strength of the pipes were investigated. Finally, a reasonable design method for the composite pipe is discussed and proposed.
10.14359/4295
SP137-07
J. M. Daly
Matching certain properties of polymer concrete overlays and repair materials more closely with those of concrete can produce better compatibility between the resin-based material and the cementitious substrate. The key parameters of polymer concretes that are significant to this end include the resin type and loading, shrinkage properties, coefficient of thermal expansion, and modulus of elasticity. The approach used most often has been to minimize the resin loading requirements. This approach, by itself, imposes certain limitations on the type of products that can be formulated. In the course of work to develop shrinkage-controlled polymer concrete utilizing an unsaturated polyester binder, it was discovered that the shrinkage control agent contributes in an important way to the thermal and elastic properties of the material. This paper describes how this finding was used to develop polymer concrete that is more compatible with portland cement concrete.
10.14359/4076
SP137
Editor: D. Gerry Walters
SP-137 An ACI publication providing information on an assortment of polymer concrete-related topics. Polymers are gaining increasing use in concrete due to the fantastic properties that they can provide. Polymer concrete is used for repairs, bridge deck and floor overlays, precast products, and structural members. Other uses are continuously under development.
10.14359/14177
SP137-05
S. Popovics
Addition of epoxy components to portland cement concrete before or during mixing is a special form of polymer modification of concrete. The polymerization of the epoxy components takes place subsequently in the concrete along with the cement hydration, resulting in a strong, durable polymer inside the hardened concrete. Therefore the process may be called post-mix polymerization. The purpose of the modification is to improve certain properties of a mortar or concrete in the fresh as well as hardened state, such as workability, flexural and compressive strengths, impermeability, etc. In this paper first the properties of the epoxy components and epoxy are discussed that are pertinent to the polymerization and concrete modification. Then the polymerization process is described along with the principles of epoxy modification of concrete. A brief description of mix design for epoxy modified concrete closes the paper.`
10.14359/10033
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