Effect of Calcium Nitrite on the Properties of Concrete Used in Prestressed Piles and Beams PDF Download
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Author: Hamdi Celik Ozyildirim Publisher: ISBN: Category : Calcium nitrite Languages : en Pages : 24
Book Description
This study evaluates the concretes in steam-cured prestressed piles and beams containing calcium nitrite as protection against chloride-induced corrosion of the steel strands and assesses their field performance over a 3-year period. Concretes containing slag were also included in the study to evaluate their permeability to chloride ions. It was found that concretes containing calcium nitrite (DCI) have satisfactory strengths and are expected to provide adequate resistance to cycles of freezing and thawing. The steam-cured slag concretes were found to have lower permeability than the similar Portland cement concretes. Since the addition of DCI does not have an appreciable adverse affect on the properties of steam-cured concretes and has the potential to provide long-term protection against corrosion, its use is recommended in prestressed concrete subjected to severe exposure. The limited time available for laboratory and field testing did not allow conclusions on the effectiveness of the corrosion inhibitor. Continuing evaluations are recommended.
Author: Hamdi Celik Ozyildirim Publisher: ISBN: Category : Calcium nitrite Languages : en Pages : 24
Book Description
This study evaluates the concretes in steam-cured prestressed piles and beams containing calcium nitrite as protection against chloride-induced corrosion of the steel strands and assesses their field performance over a 3-year period. Concretes containing slag were also included in the study to evaluate their permeability to chloride ions. It was found that concretes containing calcium nitrite (DCI) have satisfactory strengths and are expected to provide adequate resistance to cycles of freezing and thawing. The steam-cured slag concretes were found to have lower permeability than the similar Portland cement concretes. Since the addition of DCI does not have an appreciable adverse affect on the properties of steam-cured concretes and has the potential to provide long-term protection against corrosion, its use is recommended in prestressed concrete subjected to severe exposure. The limited time available for laboratory and field testing did not allow conclusions on the effectiveness of the corrosion inhibitor. Continuing evaluations are recommended.
Author: World Bank Publisher: World Bank Publications ISBN: 9780821323953 Category : Business & Economics Languages : en Pages : 1422
Book Description
The Republic of Korea's industrial policy has directed that nation's economy through nearly three decades of spectacular growth. But the authors of this paper maintain that this policy is showing signs of being outmoded. The time has come, the authors argue, for the Korean government to stop managing the economy's structural development and to redefine the responsibilities of business and government. Under this proposed compact, the allocation of resources would shift from the government to the private industrial and financial sectors. The transformation of the government bureaucracy from an ad hoc policy role to one of a transparent and predictable regulator is a key to the success of this undertaking. These new directions would present the government with enormous challenges. Greater competitive discipline and regulatory oversight would be required. While dealing with the complexities of the transition, the government would have to maintain macroeconomic stability and the momentum of savings and investment. For comparison, the study examines the industrial economies of France, Germany, Japan, and the United States, which underwent similar shifts.
Author: Hamdi Celik Ozyildirim
Author: Hamdi Celik Ozyildirim
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Author: V. M. Malhotra
Author: Library of Congress. Exchange and Gift Division
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Author: World Bank
Author: American Society for Testing and Materials