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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 31 Abstracts search results
Document:
SP144-01
Date:
March 1, 1994
Author(s):
P. K. Mehta
Publication:
Symposium Papers
Volume:
144
Abstract:
The future of the concrete industry appears to be bright from projections based on current trends in population growth, and increasing industrialization and urbanization. However, this optimism must be tempered with changing attitudes in society on ecological issues such as conservation of natural resources, durability of engineering materials, and environmental pollution. Due to increasing public concern with durability of concrete as a construction material, this subject is discussed in detail with reference to deficiencies in the science of concrete durability, methods of testing for quality assurance and service-life prediction, and education in concrete technology.
DOI:
10.14359/4530
SP144-02
B. Mather
In the August, 1971 issue of the ACI Journal, the report of the ACI Board Committee on "Concrete--Year 2000" was published. That committee concluded that looking ahead 30 years in 1971 was as difficult as it was in 1900 to look ahead 70 years to 1970 because of the accelerating rate of change. That acceleration has not altered. It is believed that the least amount of progress has occurred in the area of cooperation under what, in 1971, the committee termed "advancements in attitude." It seems that there is more rather than less conflict and litigation among participants in concrete technology. One of the most significant improvements waiting to be made is in the area that some are calling "conflict resolution." In the 21st century, concrete technology will be alive and well, and continuing to make progress in some ways that cannot now be predicted.
10.14359/4531
SP144
Editor: P. Kumar Mehta
SP-144 Eighteen review papers and twelve research papers are included in the Proceedings of the Mohan Malhotra Symposium on Concrete Technology: Past, Present, and Future. The purpose of the Symposium was to serve as a forum for discussion on the current state of the concrete industry and technology, and to identify important issues that need to be addressed in the future. The proceedings of the Mohan Malhotra Symposium, which excel for the variety and richness of information contained in the 30 papers, reflect the respect and admiration of the authors for the honoree. As a researcher, scholar, and technology-transfer crusader, Mohan has undoubtedly made unique contributions to the concrete technology. It would indeed be a fitting tribute to him if the deliberations of the Mohan Malhotra Symposium are able to make a significant impact in preparing the concrete industry for the 21st century.
10.14359/14184
SP144-27
K. W. Nasser and S. Biswas
A new model of the K-slump tester was developed that can be used to evaluate the slump of concrete in 40 sec. The new apparatus features an electronic digital readout giving the slump value to the nearest 1 percent. Experimental studies were performed in accordance with ASTM C 670 and C 802 using the new K-slump tester to determine its reliability and precision. The results indicate that the new apparatus is accurate and reliable in evaluating concrete slump.
10.14359/4407
SP144-13
V. Ramakrishnan, G. C. Hoff, and Y. U. Shankar
Presents the results of an experimental investigation conducted to determine the flexural fatigue strength of high-strength lightweight concrete under water. This concrete was produced using expanded shale aggregate and high-performance concrete admixtures such as silica fume and superplasticizer. Properties of fresh concrete and elastic and mechanical properties of hardened concretes are presented. The fresh concrete was tested for slump, air content, unit weight, and temperature. The hardened concrete was tested for moist-cured dry weight, compressive strength, modulus of elasticity, and flexural fatigue strength. The investigation indicates that a highly workable high-strength lightweight concrete can be produced successfully. The high-strength lightweight concrete had a higher endurance limit (10 to 16 percent) than normal weight concrete of equal compressive strength. In general, there was no reduction in the flexural fatigue strength for the lightweight concretes when tested under water. The static flexural strength determined from specimens that had successfully resisted 2 million cycles was always greater than that of specimens which had not undergone fatigue loading.
10.14359/4401
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