Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Construction and Performance of a Stone Matrix Asphalt Mix Test Section in Virginia
Stone matrix aspahlt (SMA) is a gap-graded mix filled with a rich asphalt-fines mastic developed in Europe. In 1991 five states constructed trial sections to determine if satisfactory mixes could be produced in the United States with current materials and high rates of production. This report discusses Virginia's first section, placed in 1992 near Lynchburg. During construction, better equipment was necessary to control the amount of fines contained in SMA mixes. Lack of control in the mix gradation caused variability on the roadway and on routine mix tests conducted during construction. The mix containing the cellulose fiber, Arbocel, has rutted more at stop-lights than the mix containing the polymer, Vestoplast, or the high-stability control mix. However, all mixes continue to perform well. Laboratory creep tests and gyratory shear tests predicted that the control mix and Vestoplast mix would be more resistant to rutting and consolidation under traffic. This investigation and work in other states have improved the current Virginia specification for SMA. The gradation was coarsened, a stiffer asphalt cement was required, and plant equipment that can adequately handle the aggregates was used. With these changes, future installations will perform better than the current dense graded mixes.
Construction and Performance of a Stone Matrix Asphalt Mix Test Section in Virginia
Stone matrix aspahlt (SMA) is a gap-graded mix filled with a rich asphalt-fines mastic developed in Europe. In 1991 five states constructed trial sections to determine if satisfactory mixes could be produced in the United States with current materials and high rates of production. This report discusses Virginia's first section, placed in 1992 near Lynchburg. During construction, better equipment was necessary to control the amount of fines contained in SMA mixes. Lack of control in the mix gradation caused variability on the roadway and on routine mix tests conducted during construction. The mix containing the cellulose fiber, Arbocel, has rutted more at stop-lights than the mix containing the polymer, Vestoplast, or the high-stability control mix. However, all mixes continue to perform well. Laboratory creep tests and gyratory shear tests predicted that the control mix and Vestoplast mix would be more resistant to rutting and consolidation under traffic. This investigation and work in other states have improved the current Virginia specification for SMA. The gradation was coarsened, a stiffer asphalt cement was required, and plant equipment that can adequately handle the aggregates was used. With these changes, future installations will perform better than the current dense graded mixes.
Construction and Performance of a Stone Matrix Asphalt Mix Test Section in Virginia
G. W. Maupin (Autor:in)
1995
35 pages
Report
Keine Angabe
Englisch
Construction Equipment, Materials, & Supplies , Highway Engineering , Materials Degradation & Fouling , Test facilities , Aggregates , Hot mix paving mixtures , Pavement wear , Creep properties , Gyrators , Polymers , Admixtures , Virginia , Road materials , Shear stress , Pavement condition , Test methods , Stone matrix asphalt mix test sections
Initial Functional Performance of Stone Matrix Asphalt Placed on Virginia Roads in 2003
| British Library Conference Proceedings | 2005
Construction of Stone Matrix Asphalt Section at Edwards Air Force Base
| British Library Conference Proceedings | 1996
Construction of Stone Matrix Asphalt Section at Edwards Air Force Base
| British Library Online Contents | 1996
Performance Baseline for Stone Matrix Asphalt
| NTIS | 2005
A Performance Baseline for Stone-Matrix Asphalt
| ASCE | 2006