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Home > Publications > International Concrete Abstracts Portal
Showing 1-5 of 13 Abstracts search results
Document:
SP85-04
Date:
April 1, 1985
Author(s):
Zareh B. Gregorian
Publication:
Symposium Papers
Volume:
85
Abstract:
This paper discusses the investigation, renovation, and restoration of ancient masonry as well as the design of modern reinforced brick masonry structures. Two categories (a) ancient brick and stone masonry structures and (b) modern reinforced brick masonry structures are discussed. Relationship between modern shell theory formulas are derived. A practical procedure which has been used for constructing modern reinforced brick structures is outlined for category (b) structures. Case studies are discussed for category (a) structures for ancient buildings such as the Soltanieh Mosque being restored by ISMEO, and the Golestan Palace which has been redesigned and restored under the supervision of the author, applying the shell theory as presented in this paper. The paper also contains case studies for two categories, (b) modern buildings "Iran Center for Management Studies" in conjuction with Harvard University and the "Bu Ali Sina University," which are designed in accordance with the criteria mentioned above for the design of modern reinforced brick masonry structures.
DOI:
10.14359/6537
SP85-05
James G. Gross
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.
10.14359/6538
SP85-06
Dov Kaminetzky
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.
10.14359/6539
SP85-07
Stella L. Marusin
A large complex of exposed-frame reinforced concrete high-rise apartments began to exhibit severe deterioration after 18 years of service. Tests on concrete extracted from the exposed columns, spandrels and balcony slabs confirmed that large amounts of chloride ions were present in the areas of deterioration. The concrete deterioration related to the corrosion of the embedded reinforcing steel of these structures. laboratory tests to materials and repair techniques, develop appropriate repair I) portland cement acrylic modified cast-in-place concrete and hand-placed epoxy mortar were selected as the restoration materials. used in the restoration are described. The repair techniques
10.14359/6540
SP85-08
Kenneth C. Hover
The use of Cathodic Protection, or the application of an electrical potential difference to reinforcing steel in concrete, has proven to be an effective means of controlling the corrosion of the steel and the subsequent deterioration of the concrete. Although this method has been successfully applied to metal structures of many types including offshore structures, the hulls of ships, and buried pipelines, the use of cathodic protection in reinforcing steel is a relatively new approach. Part I of this paper traces the development of cathodic protection, and describes the principles behind the method. Part II describes the installation, monitoring, and evaluation of a catho-dic protection system installed over a 14,000 SF (1300 m2) portion of a reinforced concrete parking garage in 1977.
10.14359/6541
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