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
Founded in 1904 and headquartered in Farmington Hills, Michigan, USA, the American Concrete Institute is a leading authority and resource worldwide for the development, dissemination, and adoption of its consensus-based standards, technical resources, educational programs, and proven expertise for individuals and organizations involved in concrete design, construction, and materials, who share a commitment to pursuing the best use of concrete.
Staff Directory
ACI World Headquarters 38800 Country Club Dr. Farmington Hills, MI 48331-3439 USA Phone: 1.248.848.3800 Fax: 1.248.848.3701
ACI Middle East Regional Office Second Floor, Office #207 The Offices 2 Building, One Central Dubai World Trade Center Complex Dubai, UAE Phone: +971.4.516.3208 & 3209
ACI Resource Center Southern California Midwest Mid Atlantic
Feedback via Email Phone: 1.248.848.3800
ACI Global Home Middle East Region Portal Western Europe Region Portal
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 14 Abstracts search results
Document:
SP117
Date:
October 1, 1989
Author(s):
Editor: Anis Farah
Publication:
Symposium Papers
Volume:
117
Abstract:
SP-117 If you are a structural engineer or a contractor, this important new volume will enhance your understanding of the most up-to-date data and techniques for assessing the long-term serviceability of new and existing concrete structures.
DOI:
10.14359/14150
SP117-08
S. B. Quinn
Concrete bridge decks have long been a problem for the design and construction industry. They have a tendency to crack and/or spall over time. The deicing process then creates problems because of salt intrusion into cracks. These cause spalling and ultimate deterioration of the reinforcing steel and the load-carrying ability of the concrete slab. The author wrote specifications concerning methods to produce a bridge deck that should be relatively crack free and thus enhance the long-term durability of the slab. Some items specified included long-term wet-mat curing, better concrete quality control, and a reduction of the water-cement ratio by 20 percent below standard specifications. He further discusses the utilization of retarders and high-range water reducers to accomplish the objective. The author then covers other methods in the literature such as epoxy-coated reinforcing bars as part of the overall process to produce a bridge deck that is relatively maintenance free over the long term.
10.14359/3344
SP117-07
V. Novokshchenov
Describes deterioration of concrete in the chambers and the culverts of Eisenhower Lock that were observed soon after the lock was completed in 1958. Investigators from the U.S. Army Engineer Waterways Experiment Station postulated that the most probable cause of deterioration was pressure created by freezing water in critically saturated concrete that was not mature enough to withstand the pressure. Slow strength gain of the concrete was believed due to the use of natural cement. The investigation conducted prior to repairs performed at Eisenhower Lock in the winter of 1985-86 suggested that poor durability of the in-place concrete may have been caused to a large extent by inadequate control over concrete operations during construction works. Therefore, all precautions have been taken to assure that the newly placed concrete will perform adequately under severe service conditions. The only operation that caused concern was adding hot water at the project site to the dry concrete mix containing portland cement.
10.14359/3338
SP117-01
T. I. Campbell, J. C. Jofriet, and W. M. Slater
A study of concrete water tanks in the Province of Ontario indicated an unusually high rate of deterioration. The different types of tanks in existence are described, and observed defects and possible related mechanisms are discussed. Particular attention is directed to freeze-thaw cycles and internal ice formations, and methods for estimation of these effects are proposed. Criteria and recommendations for the design of reinforced concrete storage structures in both freezing and nonfreezing environments are discussed.
10.14359/3334
SP117-13
C. J. Hookham and T. L. Bailey
Long-term durability of reinforced and prestressed concrete structures in U.S. nuclear power plants was identified as a critical issue in the feasibility studies of plant life extension. Evaluation of concrete structures at several operating plants included studies of known concrete degradation modes, performance of condition surveys/testing, and service life prediction. Results indicate that service lives of 60 or more years are achievable, provided that preservation activities are conducted for these concrete structures.
10.14359/2843
Results Per Page 5 10 15 20 25 50 100