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 61 Abstracts search results
Document:
SP94-57
Date:
July 1, 1987
Author(s):
J. Breen
Publication:
Symposium Papers
Volume:
94
Abstract:
The paper is the text of the keynote address presented at the Second World Congress on Joint Sealing and Bearing Systems for Concrete Structures. The speech centers on Breen's structural engineering experience with reinforced and prestressed concrete and long-span bridges.
DOI:
10.14359/3777
SP94-56
J. Bugler
This paper describes field application problems experienced during the execution of a joint resealing program initiated within the limits of Region 10 (Nassau and Sufflok Counties) in the early 1980s. It describes what was done to overcome these problems. Solutions to such problems involved equipment modification and improved inspection technique. These modifications resulted in the virtual elimination of joint overfilling and a ten-fold performance improvement with regards to first-year intermittent bond adhesion failure. Worker safety and protection are discussed.
10.14359/3767
SP94-32
H. Eggert
Since some national standards on bridge bearings have been issued and a certain level of knowledge seems to have consolidated, the time has come to prepare an ISO Standard. The most important elements that should be part of such an ISO Standard are listed. Contradictions between existing national standards should be clarified and eliminated. Outlived technology should not be part of an international standard while national standards still may specify such bearings for local reasons.
10.14359/3757
SP94-44
S. Pabst
Elastomeric concrete, when used as a transition medium in the traffic impact area, is a simplistic low-profile concept that vulcanizes permanently to the structural concrete of the bridge deck. This procedure has proven effective in waterproofing the problematic expansion joint areas while providing a unique impact-attenuating transition solution.
10.14359/3419
SP94-42
M. Bujtas
A concept of pot bearing rotation and its relation to vertical load, rotating moment, and eccentricity are examined. At certain low load and rotating combinations, uniform piston contact with the elastomer or the upper element will not occur, resulting in an uneven load transfer and increased eccentricity. Factors that may be traced to this phenomenon are presented. The rotating moment expression used contains an empiric "alpha factor" variable with three known values. Derived from early rotation tests, this "alpha" is based on the diameter-to-height (D/h) ratio of the confined elastomer. An expression for "alpha" was formulated to provide unique factors for each case. Eccentricity and eccentric neutral stress points were computed in all cases. Critical loads are indicated where piston contact loss is possible. This occurs when the eccentricity is less than the eccentric neutral stress point and at the maximum kern of the inner pot section. Piston separation here is likely, due either to the extreme eccentricity or the confined elastomer's resistance to deform at low pressures. Its importance should not be overlooked as future studies may provide substantiation. However, in assuming static equilibrium, complete piston contact is assured so long as the eccentricity remains within the kern of the pot section.
10.14359/3413
Results Per Page 5 10 15 20 25 50 100