ACI Global Home Middle East Region Portal Western Europe Region Portal
Email Address is required Invalid Email Address
In today’s market, it is imperative to be knowledgeable and have an edge over the competition. ACI members have it…they are engaged, informed, and stay up to date by taking advantage of benefits that ACI membership provides them.
Read more about membership
Learn More
Become an ACI Member
Topics In Concrete
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 83 Abstracts search results
Document:
SP114
Date:
May 1, 1989
Author(s):
V M Malhotra
Publication:
Symposium Papers
Volume:
114
Abstract:
Fly Ash, Silica Fume, Slag, and Natural Pozzolans in Concrete: Proceedings of the Third International Conference presents the latest technological advances in the use of these extremely valuable mineral by products. This two-volume set of 83 papers explores in detail how you can conserve energy and resource while increasing your profitability. The first volume contains papers dealing with fly ash and natural pozzolans, and the second volume details the use of condensed silica fume and ferrous and non-ferrous slags. 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. SP114
DOI:
10.14359/14147
SP114-65
Taketo Uomoto and Kazusuke Kobayashi
The compressive strength of blast furnace slag concrete containing slag/(cement + slag) ratios of 0, 0.3, 0.5, and 0.7 was followed by changing the curing conditions. The specimens were cured in air or water at 10, 20, or 40 C, and the strength development after 1, 4, 8, 13, and 26 weeks was determined. Equations were developed for strength based on maturity, curing, method, age of concrete, and amount of slag.
10.14359/2605
SP114-66
K. Kokubu, S. Takahashi, and H. Anzai
Portland cement was mixed with slags at different fineness and replacement levels and hydrated at 10, 20, 35, 50, and 65 C. The temperature rise of concrete containing slag was reduced when the slag replacement level was 70 percent. The hydration of slag was accelerated at temperatures between 20 and 35 C. The amount of heat liberated by the mixtures was greater than that of the reference portland cement at temperatures 35 C or higher. It is therefore evident that in mass concrete containing slag, the adiabatic temperature rise need not be lower than that of the concrete containing only portland cement.
10.14359/2606
SP114-17
J. J. Kollek
A study was conducted to determine whether pulverized fuel ash, granulated blast furnace slag, and natural pozzolana contribute effective alkalies and whether such alkalies lead to alkali-silica reaction (ASR) damage. Mortar bars were prepared in accordance with ASTM C 227 but stored at 20 C, and using three factory-produced cements, three Type F pulverized fuel ashes, three blast furnace slags, and four natural pozzolans at three or four different levels of substitution. The reactive aggregate component was Beltane opal substituted at the pessimum level, as well as zero and three near-pessimum levels. The selection of the materials and their substitution levels were adjudged to represent as wide as possible present-day usage. Deleterious expansion defined as > 0.0 percent within 4 years was taken as the criterion of failure. The results have been applied to demonstrate the deduction of practical guidelines for the use of composite hydraulic binders in situations in which ASR is a consideration. Limiting total alkali contents of composite hydraulic binders as function of the substitution ratio of the three mineral additives are suggested. The analysis of the results demonstrates that if the effective alkalies derived from portland cement are taken as 100 percent, then those derived from pulverized fuel ash and natural pozzolana can be taken as 17 percent and those derived from blast furnace slag as 50 percent of total alkalies. There is also evidence of somem mineral additives, particularly at high substitution levels, not simply acting as dilutents but exhibiting a positive ASR-suppressive effect.
10.14359/2046
SP114-70
K. Byfors, G. Klingstedt, V. Lehtonen, H. Pyy, and L. Romben
Durability properties of concrete and mortar based on a special type of alkali-activated slag called F-cement have been studied. The microstructure was found to possess a high occurrence of microcracks that had an obvious influence on the flexural strength and rate of carbonation. The rate of chloride-ion diffusion was about 30 times lower than in the portland cement concrete. Salt scaling was found to depend solely on the water-to-binder ratio and is independent of the air content. Early freezing takes place when the strength exceeds 5 MPa, and F-mortar shows high chemical resistance against solutions of sodium, calcium, and magnesium chloride.
10.14359/1827
Results Per Page 5 10 15 20 25 50 100
Edit Module Settings to define Page Content Reviewer