Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Determining Optimum Asphalt Content with the Texas Gyratory Compactor
A recent change from the California kneading compactor to the Texas gyratory compactor has resulted in significantly lower optimum asphalt contents. Additionally, only one laboratory compactive effort has been used in Colorado regardless of traffic or high temperature environment. Adjustments are being made to the Colorado's hot mix asphalt design procedure to address these concerns. It was decided to use results from the recently acquired European equipment to assist with the adjustments. Additionally, results were used from three other sources: (1) the previously used California kneading compactor, (2) samples from older pavements that were recompacted in the Texas gyratory, and (3) experimental field projects that used the recommended end-point stresses. Optimum asphalt contents need to be determined using varying laboratory compactive efforts that correspond to the various traffic and environmental conditions in Colorado. The recommendations presented in this report include the variable end-point stresses for the Texas gyratory to obtain the optimum asphalt content along with the traffic and environmental categories to assist designers on the appropriate selection of the specified end-point stress. Additionally, minimum Hveem stability values, minimum voids in the mineral aggregate, and an acceptable range for voids filled with asphalt are included.
Determining Optimum Asphalt Content with the Texas Gyratory Compactor
A recent change from the California kneading compactor to the Texas gyratory compactor has resulted in significantly lower optimum asphalt contents. Additionally, only one laboratory compactive effort has been used in Colorado regardless of traffic or high temperature environment. Adjustments are being made to the Colorado's hot mix asphalt design procedure to address these concerns. It was decided to use results from the recently acquired European equipment to assist with the adjustments. Additionally, results were used from three other sources: (1) the previously used California kneading compactor, (2) samples from older pavements that were recompacted in the Texas gyratory, and (3) experimental field projects that used the recommended end-point stresses. Optimum asphalt contents need to be determined using varying laboratory compactive efforts that correspond to the various traffic and environmental conditions in Colorado. The recommendations presented in this report include the variable end-point stresses for the Texas gyratory to obtain the optimum asphalt content along with the traffic and environmental categories to assist designers on the appropriate selection of the specified end-point stress. Additionally, minimum Hveem stability values, minimum voids in the mineral aggregate, and an acceptable range for voids filled with asphalt are included.
Determining Optimum Asphalt Content with the Texas Gyratory Compactor
T. Aschenbrener (Autor:in)
1993
79 pages
Report
Keine Angabe
Englisch
Transitioning from Texas Gyratory Compactor to Superpave Gyratory Compactor
| British Library Online Contents | 2006
Transitioning from Texas Gyratory Compactor to Superpave Gyratory Compactor
| British Library Conference Proceedings | 2006
Transitioning from Texas Gyratory Compactor to Superpave Gyratory Compactor
| British Library Conference Proceedings | 2006