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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 63 Abstracts search results
Document:
SP153
Date:
June 1, 1995
Author(s):
Editor: V.M. Malhotra
Publication:
Symposium Papers
Volume:
153
Abstract:
SP-153 In 1995, CANMET, in association with ACI, U.S.A. Electric Power Research Institute, Canadian Electrical Association, and several other organizations in Canada and the United States, sponsered the Fifth International Conference on fly ash, ferrous and nonferrous slags, and silica fume was held. The two volume proceedings of the Fifth CANMET/ACI Conference contains 62 papers from 23 countries.
DOI:
10.14359/14193
SP153-02
D. Galeota, M. M. Giammatteo, and R. Marino
The purpose of this study was to examine the mechanical and durability properties of high-volume fly ash concretes for structural applications. Four concrete mixtures were prepared with the amount of fly ash, from Italian source, varying from 0 to 50 percent by weight of total cementitious materials. A large number of concrete specimens were cast and tested to determine the compressive, flexural, and splitting tensile strengths, modulus of elasticity, fracture parameters, concrete-steel bond properties, drying shrinkage, and durability properties. The results of this study showed that high-volume fly ash concrete has considerable potential in a wide variety of structural applications.
10.14359/1062
SP153-03
J. R. Prusinski and R. L Carrasquillo
Concrete placed in contact with a sulfate environment can severely degrade due to formation of expansive compounds such as ettringite. The use of low-calcium fly ashes in concrete have been successful in mitigating these expansions. However, some high-calcium ashes have the potential to cause increased expansion of the concrete, leading to accelerated deterioration. This research focuses on producing cements interground with Class C fly ash, which can be used to produce sulfate-resistant concrete. ASTM Type I and Type II cements were blended with a sulfate-susceptible Class C ash in amounts from 0 to 70 percent fly ash. Concrete was produced using a standard Texas Highway Department 306 kg/m 3 mixture and the various interground and unblended cements. Specimens were soaked and monitored monthly for 3-1/2 years in a 10 percent sodium sulfate solution to accelerate sulfate attack. Results indicate that certain specimens made with interground cements having fly ash contents between 25 and 70 percent, and additional blended gypsum, achieved lower expansion than control specimens made with Type II, Type V, or 0 percent C 3A cements alone. This was true for fly ash/cement blends using both Type I and Type II cements. Compressive strengths of the fly ash blends, through 365 days, attained levels generally comparable to, or better than, the controls.
10.14359/1063
SP153-04
H. A. W. Cornelissen, R. E. Hellewaard and J. L. J. Vissers
In the present research project, fly ash was mechanically processed to 1 to 5 micron particle size. Mortars and concretes were made from these processed fly ashes. In this paper, the results of the micronized fly ash are compared to the results gained with air classified fly ash, silica fume, and blends. It was found that using ground fly ashes, very fluid mixtures can be produced with excellent strength and durability properties. Because of the growing interest in ultra-fine supplementary cementing materials (SCM's) for high-performance concrete, there is a need to find ways to micronize fly ashes in an economical way.
10.14359/1064
SP153-06
F. De Larrard
Presents an adaptation of a previous model (the generalized Feret's law with account for the Maximum Paste Thickness) for structural fly ash concrete. A kinetics term is introduced to predict the compressive strength development between seven and 365 days. On a set of data taken from the literature, the mean accuracy of the model is equal to 2.1 MPa. Moreover, the formula only incorporates a limited number of parameters, which can easily be determined from standard mortar or concrete tests. Therefore, the model appears to be suitable for a computer-aided concrete proportioning software.
10.14359/1065
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