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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.

International Concrete Abstracts Portal

Showing 1-5 of 13 Abstracts search results

Document: 

SP85-11

Date: 

April 1, 1985

Author(s):

Floyd E. Dimmick, Sr.

Publication:

Symposium Papers

Volume:

85

Abstract:

During the winter of 1980 the cooling tower portion of work on the Stoney Brook Energy Center, Ludlow, Massachusetts was stopped due to cementitious grout failure in the precast concrete joint connections. Each precast concrete tee was connected to another tee by a cementitious grout joint. The grout apparently foamed during the installation. It was reported by the contractor that the grout was installed under conditions of application favorable for proper usage as specified by the grout manufacture-The average compressive strenqth of the foamed portion of the grout was 400 psi (2 .8 MPa). The depth of the foamed grout varied from 2.5 to 4 inches (63-101 mm). Three very important factors influenced the selection of the replacement material : low substrate temperature during application, low temperature application ability and product curability at sub-zero degrees fahrenheit temperatures. After a thorough investigation by the contractor of epoxy and cementitious grout manufacturers, it became apparent only one company was capable of supplying a commercially available product able to meet the above stated application conditions. A patented two-component modified epoxy mortar was selected from a U.S. manufacturer. This report is broken down into eight categories: selection of repair material; epoxy mortar selection; surface preparation; equipment, mixing and installation; independent laboratory results; conclusions; and recommendations listing quality control measures to be followed by others attempting this type of repair.

DOI:

10.14359/6544


Document: 

SP85-05

Date: 

April 1, 1985

Author(s):

James G. Gross

Publication:

Symposium Papers

Volume:

85

Abstract:

This paper provides an overview of building regulations applied to rehabilitation. Covered are constraints due to regula-tion, technical activities to improve regulations, and research needed to effectively use the existing building stock. Progress has recently been made toward removal of regulatory constraints. Many technical problems remain to be solved through research which needs support from both the public and private sectors. The analysis of numerous studies indicates a strong need for technical evaluation techniques to assist decision making for building rehabilitation.

DOI:

10.14359/6538


Document: 

SP85-06

Date: 

April 1, 1985

Author(s):

Dov Kaminetzky

Publication:

Symposium Papers

Volume:

85

Abstract:

The various steps that must be taken in order to or restored are described. After the history of the structure has been researched, a condition survey of the structure and its foundations should be performed and supplemented with a geometry Laboratory testing of material samples then follow with structural analysis carried out to determine final structural adequacy and economical feasibility. A case history is described, The paper is concluded with recommendations for the establishment of an ACI guideline and additional research.

DOI:

10.14359/6539


Document: 

SP85-01

Date: 

April 1, 1985

Author(s):

Boris Bresler

Publication:

Symposium Papers

Volume:

85

Abstract:

Essential steps in modifying structures for the purpose of adapting old buildings to new use are discussed in this paper. Eight basic steps are described: (1) pre-liminary site visit, (2) documentation of original design and construction, (3) identification of desired changes in the building, (4) identification of code requirements applicable to building alterations, (5) development of structural modi-fication schemes and preliminary cost estimates, (6) verifi-cation of "as is" condition, review of adequacy of proposed modification scheme and estimated cost, (7) completion of design and construction documents, including drawings and specifications, and (8)'coordination of engineering design with construction quality control and accommodation of possible need for design changes during construction.

DOI:

10.14359/6534


Document: 

SP85-02

Date: 

April 1, 1985

Author(s):

James R. Clifton

Publication:

Symposium Papers

Volume:

85

Abstract:

This paper describes nondestructive evaluation (NDE) methods that can be used in assessing the condition of concrete and masonry materials and components in structures being rehabilitated or preserved. Metal reinforcement is also included. The appropriate use of NDE methods is discussed and a recommended approach to selecting NDE methods for specific situations is given. NDE methods are briefly described based on their principle of operation, information they provide, applications, expertise required to use them, and advantages and limitation to their use.

DOI:

10.14359/6535


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