Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
A program of construction and the performance evaluation of three major Virginia experimental flexible pavements is reported. The objective of the program was to evaluate the performance of pavements incorporating new or timely design concepts and to assess the feasibility of these concepts for further use. A resilient select borrow material used over a resilient subgrade does not enhance pavement performance. Pavements having cement treated crushed stone under a thin (3 in.) bituminous structure have performed very poorly. Transverse shrinkage cracks reflect from a cement treated stone subbase through 3 inches of bituminous concrete in as little as 18 months, and through 7 inches in less than 5 years. Where cement stabilized stone subbases are used and when truck traffic is normally channeled into the outer lanes, advantage may be taken of the omission of the stabilization from stone subbases under inner or passing lanes. Shrinkage cracking aside, 4 inches of cement treated aggregate base, 4 inches of bituminous concrete, and 6 inches of untreated crushed stone base (all underlaying 7 inches of bituminous concrete) give approximately equal performance after 5 years under heavy traffic conditions. (Author)
A program of construction and the performance evaluation of three major Virginia experimental flexible pavements is reported. The objective of the program was to evaluate the performance of pavements incorporating new or timely design concepts and to assess the feasibility of these concepts for further use. A resilient select borrow material used over a resilient subgrade does not enhance pavement performance. Pavements having cement treated crushed stone under a thin (3 in.) bituminous structure have performed very poorly. Transverse shrinkage cracks reflect from a cement treated stone subbase through 3 inches of bituminous concrete in as little as 18 months, and through 7 inches in less than 5 years. Where cement stabilized stone subbases are used and when truck traffic is normally channeled into the outer lanes, advantage may be taken of the omission of the stabilization from stone subbases under inner or passing lanes. Shrinkage cracking aside, 4 inches of cement treated aggregate base, 4 inches of bituminous concrete, and 6 inches of untreated crushed stone base (all underlaying 7 inches of bituminous concrete) give approximately equal performance after 5 years under heavy traffic conditions. (Author)
Pavement Design and Performance Studies
K. H. McGhee (Autor:in)
1971
31 pages
Report
Keine Angabe
Englisch
Civil Engineering , Flexible pavements , Performance , Design , Virginia , Feasibility , Pavement bases , Cements , Shrinkage , Rocks
Flexible pavement design and performance studies
Engineering Index Backfile | 1962
Concrete pavement design and performance studies, 1960
Engineering Index Backfile | 1960