Home > Publications > International Concrete Abstracts Portal


ABOUT THE 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.

International Concrete Abstracts Portal

Showing 1-5 of 44 Abstracts search results

Document: 

SP54-15

Date: 

January 1, 1977

Author(s):

Elwood R. Rogers

Publication:

Symposium Papers

Volume:

54

Abstract:

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.

DOI:

10.14359/18028

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

Document: 

SP54-13

Date: 

January 1, 1977

Author(s):

Helmut G. Kobler, P.E.

Publication:

Symposium Papers

Volume:

54

Abstract:

Late in 1964, while working on the construction of the Montreal Subway, a dear friend of mine, Dr. Emil Schmidt, Past President and Chairman of the Sika Chemical Corporation, asked me to write a paper for ACI dealing with my past experience in the use of dry-mix coarse-aggregate shotcrete as underground support. At that point in time, my knowledge of the subject under consideration was limited and based only upon experience gained while using the process in Venezuela, Switzerland and Austria. Since, at the time of Emil's request, very little about the material and underground shotcrete procedures was known on the North American Continent, I was indeed most eager to impart to my North American colleagues the limited knowledge I possessed about the subject. The result of my efforts became known as Paper No. 3 of ACI publication SP-14 titled "Shotcreting". A while back, Professor Parker was kind in asking me to present to you at this conference, an update of my 1966 paper.

DOI:

10.14359/18026

Document: 

SP54-25

Date: 

January 1, 1977

Author(s):

W. Mayrhauser

Publication:

Symposium Papers

Volume:

54

Abstract:

The NATM is a double shell building mehtod consisting of the shotcrete outer arch (reinforced by welded wire fabric and steel rib sections) and the systematically anchored rock carrying ring. The rock carrying ring is the primary supporting element and thus of the greatest importance. These two shells - the shotcrete outer arch and the rock carrying ring - have to be dimensioned in such a manner that the gound reaches a permanent equilibrium. To ascertain this, extensive measuring is required. These measurements are a fundamental criterion of the NATM and consist of: a) Roof conolidation bolts b) Convergency measurements c) Extensometer measurements d) Measuring anchors. These measurements are taken continuously in the course of the advance on site.

DOI:

10.14359/18038

Document: 

SP54-24

Date: 

January 1, 1977

Author(s):

Malcolm J. Amos

Publication:

Symposium Papers

Volume:

54

Abstract:

From the Construction Management point of view I believe there are two primary considerations for judging Methods of Payment. 1. The method of payment should encourage good construction techniques and practices. 2. The method of payment should be capable of only one interpretation, both as regards measurement and payment.

DOI:

10.14359/18037

12345...>>

Results Per Page