Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
A Study of Physical Factors Affecting the Durability of Asphaltic Pavements. Rates of Asphalt Hardening at in-Service Temperatures
The investigation was undertaken to study the rates of asphalt hardening at in-service pavement temperatures with a view to gaining an understanding of the factors affecting the durability of asphalt pavements. A sol, sol-gel, and gel asphalt was investigated. Asphalt samples were subjected to various test temperatures in 100 micron films on glass plates. Changes in asphalt consistency were measured by changes in apparent absolute viscosity and changes in percent asphaltenes. The apparent absolute viscosity analysis was performed using the Brown, Sparks, and Larson theory which states that the change in test value with time follows a simple hyperbolic law. The asphaltene analysis was performed by the application of absolute rate theory. Tests results indicated that the rate of change of apparent absolute viscosity is dependent on temperature and the rate of formation of asphaltenes, after a short period of time, is independent of asphalt type and temperature. It was concluded that a sol type asphalt is the most desirable asphalt as related to asphalt pavement durability. (BPR abstract)
A Study of Physical Factors Affecting the Durability of Asphaltic Pavements. Rates of Asphalt Hardening at in-Service Temperatures
The investigation was undertaken to study the rates of asphalt hardening at in-service pavement temperatures with a view to gaining an understanding of the factors affecting the durability of asphalt pavements. A sol, sol-gel, and gel asphalt was investigated. Asphalt samples were subjected to various test temperatures in 100 micron films on glass plates. Changes in asphalt consistency were measured by changes in apparent absolute viscosity and changes in percent asphaltenes. The apparent absolute viscosity analysis was performed using the Brown, Sparks, and Larson theory which states that the change in test value with time follows a simple hyperbolic law. The asphaltene analysis was performed by the application of absolute rate theory. Tests results indicated that the rate of change of apparent absolute viscosity is dependent on temperature and the rate of formation of asphaltenes, after a short period of time, is independent of asphalt type and temperature. It was concluded that a sol type asphalt is the most desirable asphalt as related to asphalt pavement durability. (BPR abstract)
A Study of Physical Factors Affecting the Durability of Asphaltic Pavements. Rates of Asphalt Hardening at in-Service Temperatures
W. H. Gotolski (Autor:in) / S. K. Ciesielski (Autor:in) / R. W. Smith (Autor:in)
1968
81 pages
Report
Keine Angabe
Englisch
Civil Engineering , Pavements , Wear resistance , Asphalt , Elasticity , Rheology , Chemical properties , Viscosity , Cements , Thickness , Deterioration , Mixtures , Shear stresses , Ductility , Age hardening , Physical properties , Temperature , Analysis , Asphaltenes
Study of physical factors affecting durability of asphaltic pavements
| Engineering Index Backfile | 1968
Asphaltic concrete and sheet asphalt pavements
Engineering Index Backfile | 1913