Download or read book Evaluation of Experimental Flexible Pavements written by Kenneth H. McGhee and published by . This book was released on 1978 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Evaluation of Experimental Flexible Pavements written by Kenneth H. McGhee and published by . This book was released on 1979 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt: The construction and performance of seven Virginia flexible pavements containing at least some experimental features were evaluated. The objective was to evaluate the performance of the pavements incorporating new or timely design concepts and to assess the flexibility of these concepts for further use.
Download or read book Evaluation of Experimental Flexible Pavements written by Kenneth H. McGhee and published by . This book was released on 1975 with total page 23 pages. Available in PDF, EPUB and Kindle. Book excerpt: A program of construction and performance evaluation of seven Virginia flexible pavements containing at least some experimental features is reported. The objective of the program is to evaluate the performance of the pavements incorporating new or timely design concepts and to assess the flexibility of these concepts for further use. Among the major findings of the study to this point are the following. 1. Pavements having equivalent design thickness indices are not necessarily equivalent in construction cost or in early structural strength, 2. Very early deflection tests do not give good indications of the ultimate strength characteristics of pavements having cement stabilized layers. Full-depth asphaltic concrete pavements can give excellent performance in very poor soil areas, especially when the design is modified through the provision of a cement stabilized subgrade. An unstabilized sandwich layer placed between a cement stabilized layer and asphaltic concrete layers is effective in significantly delaying the reflection of transverse cracking from the cement stabilized layer through the asphaltic concrete layers. There is some evidence that reflective cracks may develop after many years under heavy truck traffic. Such a sandwich layer is weaker than either of the two layers it contacts and can cause a net reduction in pavement strength as compared with the situation where the weaker layer is on the bottom. Transverse shrinkage cracks reflect from a cement treated stone subbase through 3 inches (75 mm) of bituminous concrete in as little as 18 months and through 7 inches (175 mm) of bituminous concrete in less than 5 years. Cement treatment of stone subbases can be omitted in passing lanes with no detriment to performance. (This may not be true with traffic volumes near capacity because of the change in distribution of truck usage as that point is approached.
Download or read book Evaluation of Experimental Flexible Pavements written by Kenneth H. McGhee and published by . This book was released on 1974 with total page 21 pages. Available in PDF, EPUB and Kindle. Book excerpt: Deflection tests conducted during the construction and shortly after the completion of a large experimental pavement project are reported. Four different pavement designs, as follows, are compared: 1. 6-inch cement stabilized subgrade, 6-inch crushed stone base, 71/2-inch bituminous concrete. 2. 6-inch cement stabilized subgrade, 91/2-inch bituminous concrete. 3. 4-inch cement stabilized crushed stone subbase, 6-inch crushed stone base, 7 1/2-inch bituminous concrete. 4. 6-inch cement stabilized subgrade, 4-inch cement stabilized crushed stone base, 5 1/2-inch bituminous concrete. The results of these early tests support the following conclusions. 1. Pavements having equivalent design parameters are not necessarily equivalent in either early structural strength or in construction costs. 2. Very early deflection tests are not good indicators of the ultimate strength characteristics of pavements having cement stabilized layers. 3. Highly resilient soils must be stabilized to achieve a good working platform and to assure the early development of design strength. 4. Design No. 4, above, develops the design structural strength more rapidly and at a lower cost than the other three designs.
Download or read book Modeling and Design of Flexible Pavements and Materials written by Dallas N. Little and published by Springer. This book was released on 2017-09-25 with total page 702 pages. Available in PDF, EPUB and Kindle. Book excerpt: This textbook lays out the state of the art for modeling of asphalt concrete as the major structural component of flexible pavements. The text adopts a pedagogy in which a scientific approach, based on materials science and continuum mechanics, predicts the performance of any configuration of flexible roadways subjected to cyclic loadings. The authors incorporate state-of the-art computational mechanics to predict the evolution of material properties, stresses and strains, and roadway deterioration. Designed specifically for both students and practitioners, the book presents fundamentally complex concepts in a clear and concise way that aids the roadway design community to assimilate the tools for designing sustainable roadways using both traditional and innovative technologies.
Download or read book Structural Factors for Flexible Pavements initial Evaluation for the SPS 1 Experiment written by Harold L. Von Quintus and published by . This book was released on 2003 with total page 378 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Manual for the Evaluation of Flexible Pavements in the Zone of Interior written by Waterways Experiment Station (U.S.) and published by . This book was released on 1954 with total page 194 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Experimental Flexible Pavements written by Kenneth H. McGhee and published by . This book was released on 1971 with total page 38 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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. Among the major findings of the study are: 1. A resilient select borrow material used over a resilient subgrade does not enhance pavement performance. When used between a cement stabilized subgrade and a crushed stone base, the resilient select material may, in fact, impair performance. There is some evidence that resiliency is reduced after a substantial number of wheel loads, with an improvement in subsequent pavement performance. 2. Pavements having cement treated crushed stone under a thin (3 in.) bituminous structure have performed very poorly. 3. 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. 4. 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. 5. Shrinkage cracking aside, 4 inches of cement treated aggregate base, 4 inches of bituminous concrete, and 6 inches of untreated crushed stone base (all underlying 7 inches of bituminous concrete) give approximately equal performance after 5 years under heavy traffic conditions. Higher deflections and greater cracking on the pavement incorporating the untreated stone suggest that the performance may not be equal after many load applications.
Download or read book The Structural Evaluation of Flexible Pavements written by Bonner Sutton Coffman and published by . This book was released on 1966 with total page 97 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1995 with total page 700 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.
Download or read book The Structural Evaluation of Flexible Pavements written by Bonner S. Coffman and published by . This book was released on 1964 with total page 87 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Hot mix Asphalt Mixtures written by and published by . This book was released on 1999 with total page 192 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Experimental Flexible Pavements written by C. S. Hughes and published by . This book was released on 1968 with total page 35 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Review of the Florida Experimental Flexible Pavements written by Stephen L. Fuller and published by . This book was released on 1971 with total page 126 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book An Experimental Evaluation of a New Approach to Concrete Overlay Design for Flexible Pavements written by J. P. Nielsen and published by . This book was released on 1969 with total page 50 pages. Available in PDF, EPUB and Kindle. Book excerpt: The report is concerned with the design of concrete overlays for flexible pavements. The conventional Westergaard analysis for the design of concrete overlays is reviewed and its weaknesses are enumerated. A review of layered theory indicated that an elastic layered solid approach to overlay design would predict an overlay thickness thinner than that suggested by Westergaard and, thus it offers a dollar savings in construction costs without a loss in rated load capacity. A field test section consisting of overlays of different thicknesses was constructed and load tested to evaluate the appropriateness of the new theoretical approach and also to verify the assumed failure criterion. A limited strain concept was selected as the failure mode; that is, the maximum tensile strain in the concrete at the overlay-pavement interface should be limited to a prescribed maximum value. (Author).
Download or read book Report of Flexible Pavement Conference Waterways Experiment Station Vicksburg Mississippi 12 13 July 1960 written by and published by . This book was released on 1960 with total page 232 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Accelerated Methods of Life Testing Pavements written by Organisation for Economic Co-operation and Development and published by . This book was released on 1972 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt:
