Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Improved Concretes for Corrosion Resistance
A major cause of concrete deterioration on bridge structures is the corrosion of the embedded steel reinforcement. In response to the continued problem of corrosion, FHWA initiated this research aimed at (1) quantifying the corrosive conditions fostering concrete bridge deterioration and (2) identifying concrete materials which consistently provide superior performance when used in bridge applications. The experimental phase of this research project was divided into three tasks: Task A - Corrosive Environment Studies, Task B- Concrete Chemical and Physical Properties, and Task C - Long-Term Corrosion Performance. This Interim Report reviews the results of tasks A and B and provides recommendations for performing task C. In task A, laboratory experiments were conducted to characterize the corrosive environment and to establish boundary conditions for environmental variables of moisture content, chloride concentration, and temperature. Special test specimen design and test procedures were developed to permit uniform chloride diffusion to the steel surface. A full factorial matrix of experiments were performed for three levels each of chloride concentration, relative humidity, and temperature. A regression model was developed to predict corrosion rate and corrosion potential as a function of environment for two different concretes. In task B, experiments were performed to identify the chemical components of concretes and to determine how they effect corrosion induced deterioration of concrete structures.
Improved Concretes for Corrosion Resistance
A major cause of concrete deterioration on bridge structures is the corrosion of the embedded steel reinforcement. In response to the continued problem of corrosion, FHWA initiated this research aimed at (1) quantifying the corrosive conditions fostering concrete bridge deterioration and (2) identifying concrete materials which consistently provide superior performance when used in bridge applications. The experimental phase of this research project was divided into three tasks: Task A - Corrosive Environment Studies, Task B- Concrete Chemical and Physical Properties, and Task C - Long-Term Corrosion Performance. This Interim Report reviews the results of tasks A and B and provides recommendations for performing task C. In task A, laboratory experiments were conducted to characterize the corrosive environment and to establish boundary conditions for environmental variables of moisture content, chloride concentration, and temperature. Special test specimen design and test procedures were developed to permit uniform chloride diffusion to the steel surface. A full factorial matrix of experiments were performed for three levels each of chloride concentration, relative humidity, and temperature. A regression model was developed to predict corrosion rate and corrosion potential as a function of environment for two different concretes. In task B, experiments were performed to identify the chemical components of concretes and to determine how they effect corrosion induced deterioration of concrete structures.
Improved Concretes for Corrosion Resistance
N. G. Thompson (Autor:in) / D. R. Lankard (Autor:in)
1997
178 pages
Report
Keine Angabe
Englisch
Highway Engineering , Civil Engineering , Corrosion & Corrosion Inhibition , Reinforced concrete , Highway bridges , Corrosion , Reinforcing steels , Chlorides , Temperature , Atmospheric corrosion tests , Humidity , Regression analysis , Concrete durability , Electrical resistivity , Bridge decks , Compressive strength , Models , Air content , Water cement ratio , Aggregates , Additives , Cements
Corrosion Resistance of Montmorillonite-Modified Dense Concretes
| Springer Verlag | 2018
Corrosion Resistance of Montmorillonite-Modified Dense Concretes
| Springer Verlag | 2016
Corrosion-resistant sulfur concretes
| TIBKAT | 1983