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 13 Abstracts search results
Document:
SP136-06
Date:
January 1, 1993
Author(s):
Mark D. Luther
Publication:
Symposium Papers
Volume:
136
Abstract:
Structural Lightweight Aggregate Concrete
DOI:
10.14359/4265
SP136-07
Alexander M. Vayasburd
During the past three decades, lightweight aggregate concrete has emerged as an important sector of the structural concrete industry. It possesses unique properties, similar in some ways to those of normal weight concrete, but differing in significant aspects. Difficulties experienced with lightweight concrete in some projects appears to be caused by a lack of understanding of the differences between normal weight concrete and lightweight concrete as materials and differences in production technologies. It is most wisely used when treated as a material in its own right, with its special properties fully considered in design and construction. A three-phase model of lightweight concrete and its effect on durability are discussed as they relate to selection of materials, concreting and curing technology, control of in-service distress due to freezing and thawing, and corrosion of reinforcing steel. ased on the observed performance of bridge and marine structures built over the past four decades, the author presents a series of generalized observations applying to durability of lightweight concrete that provide a fair cross section of the entire experience. Paper concludes that, with proper selection of materials and design, and good construction practices, lightweight concrete offers an excellent solution to the problem of durability in severe environment.
10.14359/4267
SP136-09
T. W. Bremner, T. A. Holm, and J. M. McInerney
The effect of stress on the nitrogen gas permeability of structural lightweight concrete was determined using cylindrical hollow concrete specimens loaded in axial compression at the same time that a nitrogen pressure differential was maintained across the cylinder wall. The nitrogen gas flow rate across the cylinder wall was noted and concrete permeability was measuredas the load increased. Flow rates tended to remain constant up to a critical stress corresponding to the onset of unstable crack propagation, at which time the flow rate increased rapidly. Rapid increases in permeability occurred at lower levels of applied stress-to-strength ratio with normal weight concrete than with lightweight concrete.
10.14359/4269
SP136-05
James E. Roberts
Describes the use of expanded shale lightweight concrete for both older bridge widenings and new bridge construction on the California State Highway System in the past 30 years. Examples of major projects illustrate the durability and reliability of a properly designed and constructed lightweight aggregate bridge. Cost comparisons of lightweight aggregate structures bid in competition with structural steel and normal weight concrete alternative structures highlight the economic viability of this material. The outstanding performance of these lightweight bridges under heavy traffic and the close competition in bidding suggests that lightweight aggregate is a material that should be considered in future bridge designs, especially in earthquake country, where dead load is such an important factor in seismic design. The known consistent creep, shrinkage, and modulus properties of lightweight aggregate remove any doubts about performance, as certain structures have demonstrated. Industry advances in controlling moisture content have reduced considerably the handling and finishing problems of earlier years.
10.14359/4240
SP136
Editors: Thomas A. Holm and Alexander M. Vaysburd / Sponsored by: ACI Committee 213
This compilation of 12 papers addresses the performance of structural lightweight concrete, with topics ranging from fundamental laboratory studies to case histories of concrete performance. 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. SP136
10.14359/14168
Results Per Page 5 10 15 20 25 50 100
Edit Module Settings to define Page Content Reviewer