Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Factors Affecting the Performance of Bridge Decks in Virginia
A detailed examination was made of 34 bridge decks, 11 to 30 years old, containing uncoated reinforcing steel. These bridges are located throughout Virginia. Cores were taken from each to evaluate the quality of the concrete with the objective of determining the relationship of concrete properties with the long-term performance of such bridge decks. It was shown that the greatest deterioration in these decks results from the ingress of chloride ions into the concrete, thus confirming the need for concretes with low permeabilities to be used in bridge decks. Low permeability is especially important where uncoated reinforcing steel is present. Some of the bridges examined in the study were constructed prior to 1966 when changes were made in the Virginia Department of Transportation's specifications. However, other than entrained air content, there is a relatively narrow range of measured quality parameters for these concretes, and most are considered to be of acceptable quality. Accordingly, specific numerical relationships between the concrete properties studied and the environmental and traffic conditions or the deterioration of the bridge decks were not established.
Factors Affecting the Performance of Bridge Decks in Virginia
A detailed examination was made of 34 bridge decks, 11 to 30 years old, containing uncoated reinforcing steel. These bridges are located throughout Virginia. Cores were taken from each to evaluate the quality of the concrete with the objective of determining the relationship of concrete properties with the long-term performance of such bridge decks. It was shown that the greatest deterioration in these decks results from the ingress of chloride ions into the concrete, thus confirming the need for concretes with low permeabilities to be used in bridge decks. Low permeability is especially important where uncoated reinforcing steel is present. Some of the bridges examined in the study were constructed prior to 1966 when changes were made in the Virginia Department of Transportation's specifications. However, other than entrained air content, there is a relatively narrow range of measured quality parameters for these concretes, and most are considered to be of acceptable quality. Accordingly, specific numerical relationships between the concrete properties studied and the environmental and traffic conditions or the deterioration of the bridge decks were not established.
Factors Affecting the Performance of Bridge Decks in Virginia
C. Ozyildirm (Autor:in) / W. J. Halstead (Autor:in)
1991
35 pages
Report
Keine Angabe
Englisch
| Tema Archiv | 1999
Research Relating to Bridge Decks in Virginia
| NTIS | 1965
Research relating to bridge decks in Virginia
| Engineering Index Backfile | 1965