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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 62 Abstracts search results
Document:
SP179
Date:
June 1, 1998
Author(s):
Editor: V.M. Malhotra
Publication:
Symposium Papers
Volume:
179
Abstract:
This Symposium Publication contains the proceedings of the Fourth CANMET/ACI/JCI International Conference held in Tokushima, Japan, in June 1998. Sixty-two refereed papers were accepted for presentation at this conference and for this publication. 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. SP179
DOI:
10.14359/14172
SP179-49
M. Eto, K. Maruyama and S. Ono
The authors have proposed a partially pre-cooling system for massive structures, such as gravity concrete dams. It is discussed in this paper how the effectiveness of the proposed method is discussed using the finite element analysis. In the ordinary pre-cooling system, pre-cooled concrete is placed in the entire region (width and depth) of a massive structure. In the proposed system , pre-cooled concrete is placed only in the surface layer. In order to evaluate the effectiveness of this system, a thermal stress analysis was conducted by the finite element method. The key parameters were the dimensions of the cooling system and cooling temperatures. The results show that the proposed system is rather effective than the conventional cooling system in terms of the thermal stress condition of massive concrete structures. In addition, the cost benefit is adequately expected.
10.14359/10135
SP179-43
A. Kawamura, M. Kuromoto and T. lwai
This paper discusses the mechanism of the setting shrinkage of polymer concrete with liquid resin mainly composed of methyl methacrylate (MMA-PC) and reports the study results on the method for reducing the setting shrinkage. The setting shrinkage is classified into two large categories, that is, shrinkage due to polymerization and shrinkage caused by temperature decrease after the maximum temperature is reached. The shrinkage amount due to temperature decrease is in proportion to the liquid resin content. The authors demonstrated that the shrinkage due to polymerization significantly vanes with the formation state of matrix of liquid resin with tiller. For reducing the shrinkage, it is effective to confine the shrinking strain by adding fibers and modifying the filler properties to limit the volume change due to polymerization.
10.14359/6070
SP179-44
K. Horii, T. Tsutsuzaki and K. Kohno
The purpose of this paper is to develop pre-casting permanent forms which are effective in improving the durability and appearance of concrete structure, conserving wood and modernizing cast-in-place concrete work. The influences of various materials used and accelerated curing methods on the properties of PCM(polymer cement mortar) applied to the forms were investigated. In these experiments, polymer dispersions composed of SA(styrene-acryl), PAE(polyacrylic ester), EVA(ethylene-vinyl acetate) and SBR(styrene-butadiene rubber) were used. Mixtures contained aggregate ; crushed silica and ferro-nickel slag sand, cement ; normal Portland, high-early strength portland and white portland cement, and color pigment ; red, green, yellow and black color pigment, were used. Steam curing and oven-dry curing were carried out. The fluidity, compressive strength, flexural strength, resistance to abrasion, chloride ion penetration, carbonation and sulfate, and surface color of PCM were examined. From these investigations, the following conclusions can be obtained. The use of SA type polymer, ferro-nickel slag sand, high-early strength portland cement and color pigments were effective in getting PCM with high fluidity, mechanical strength, durability and tinting strength. Additionally, steam curing and oven-dry curing are practical for the early-age strength development of PCM.
10.14359/6071
SP179-45
D. Van Gemert and K. U. Leuven
Automated production of precast polymer concrete construction components is presented. Both batchwise and continuous production are discussed, and examples of both techniques are shown. Automated on-site application and execution systems allow benefits to be taken of the specific features of polymer-cement concrete. Automated execution of overlays, tunnels, porous polymer-cement concrete pavements and polymer-cement shotcrete are presented as examples.
10.14359/6072
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