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Home > Publications > International Concrete Abstracts Portal
Showing 1-5 of 44 Abstracts search results
Document:
SP54-14
Date:
January 1, 1977
Author(s):
Ronald F. Bills
Publication:
Symposium Papers
Volume:
54
Abstract:
An outline including: General; Geology; Choice of Support; Multiple Shafts; Shaft Sinking; Cycle
DOI:
10.14359/18027
SP54-15
Elwood R. Rogers
My first experience in shotcrete was in 1966 on the Glendora Tunnel in California. At that time Shotcrete was considered by many to be one of the dark occult arts. . .Since that time, meetings such as this and the continuing exchange of information between all of you in the industry has dispelled the myths. We have a better understanding of the realities of this remarkable tool we call shotcrete. . .I would like to break my discussion of shotcrete equipment into three topics. The shotcrete machines or guns; The material delivery systems; Accessory items.
10.14359/18028
SP54-16
David A. Monaghan, David J. Hoadley, and Grant L. Anderson
A raised-shaft lining systems has been developed through a Bureau of Mines contract, "Development of Raise Boring/Shotcrete Support System" (Contract H0252003), awarded to Foster-Miller Associates, Inc. . .This system is specified to operate in raise-bored shafts 9 to 12 feet in diameter, be operated and monitored from the surface, place linings 2 to 6 inches thick, be operable to 1,000 feet deep and place linings at rates of up to 30 feet per hour.
10.14359/18029
SP54-17
H.R. Egger
The vehicle in the classical method to spray shotcrete is compressed air. Thereby the aggregate and the cement are transported within a high speed stream of air in the state of a suspension. Many attempts have been exerted to apply other possiblities of transporting the concrete mix. Despite of these numerous efforts there basically remain three varioes methods: 1 dry aggregate suspended in a stream of air 2 slugs of wet mix propelled by compressed air 3 compact wet mix pressed forward mechanically. I will refer to hereafter as method one, two and three.
10.14359/18030
SP54-18
G. R. Packham
The three systems of transporting and spraying concrete are: 1. Dry process. 2. Wet process. 3. Compressed flow process. The dry process, dry mixtures with water added at the nozzle, is the oldest and most reliable for engineering processes at this moment. The other methods are being used in the USA and elsewhere. My company, Wallco Chemical Corporation, is a distributor for the dry process equipment and so my lecture today relates to this type of equipment.
10.14359/18031
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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.
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