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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 1-10 of 39 Abstracts search results
January 1, 1974
The Engineering Foundation Conference on "use of Shotcrete for Underground Structural Support" program schedule on July 16-20, 1973 in South Berwick, Maine.
Resolutions: Shotcrete has become an important and exciting development in the technology of underground structural support, and; A need exists for the practioners of the art to join in exchanging information, assessing the current state of the art, and selecting the most promising avenues for further development. Resolved solutions follow in the rest of the report.
The theme of this conference has been to "tell it like it is." Based on my understanding of the many excellent presentations and discussions of this week, I'll continue this theme.
Kenneth D. Hansen, Reporter
Contractor James P. Crawford of Sansan, Inc. began the session by relating his experience using shotcrete for structural rehabilitation on three projects. The first two projects were somewhat similar in that they were both railroad tunnel rehabilitations in Ohio.
James R. Graham
The author wishes to thank Mr. Robert C. Bates for the discussion of his paper "Polymer Shotcrete." Mr. Bates presents some very good and appropriate points regarding safety when considering the use of materials such as the monomers discussed in the paper.
Discussion by: Robert C. Bates
Responding to Mr. Graham's paper on the Bureau of Reclamation's work with polymer shotcrete - The Bureau of Mines has also investigated the use of polymeric materials for "shotcrete" linings, and at the present time, we cannot be as optimistic as Mr. Graham on flammability and toxicity.
We have discussing at considerable length various problems and unanswered questions with the use of accelerators and cement in concrete. The subject of shotcrete strength development has also occupied much of our dialogue. "I want to present to you a shotcreting system that uses neither accelerators nor portland cement and develops high early strength. I am talking about what we call 'polymer shotcrete'."
James S. Goff
An economic need necessitated the experimentation and development of a high production nozzle that had a low maintenance factor. With commercial nozzles, as production increased, the maintenance factor accelerated and the nozzle itself proved to be a limiting factor for higher production. The shotcrete was used for rock support in an 18' horseshoe tunnel and was used primarily by itself to make the rock support itself in lieu of using shotcrete with rock bolts or steel sets. All of our equipment is rail-mounded with a sliding floor, and a "California Switch" in each heading.
James P. Crawford
This article features reports on: Hanna Tunnel Rehabilitation; Rexford Tunnel Rehabilitation; Detroit Water Tunnel Repairs; Summary of Shotcrete Tests for Permanent Tunnel Lining in Clay
Paul J. Tilp
The subject of this summary is: Shotcrete Quality Control and Instrumentation, and the topics in the articles that follow discuss this subject.
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