Author:
Publisher:
ISBN:
Category : Pavements
Languages : en
Pages : 194
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The Midwest States Accelerated Pavement Testing Pooled Fund Program, financed by the highway departments of Missouri, Iowa, Kansas and Nebraska, has supported an accelerated pavement testing (APT) project to compare the performance of stabilized clayey embankment soil when Portland cement, fly ash, lime and a commercial product were used as stabilizing agents. The project aimed to improve the practices related to the design of flexible pavements when the top of the subgrade is improved by chemical stabilization. The experiments were conducted at the Civil Infrastructure Systems Laboratory (CISL) of Kansas State University. The test program consisted of constructing four flexible pavement structures and subjecting them to full-scale accelerated loading test. The study indicated that cement and lime are the most effective stabilizers for the studied soil. These stabilizers resulted in lower vertical compressive stresses at the top of the subgrade and lower rut depth at the pavement surface than the fly ash-treated soil. After more than two million axle load repetitions, the pavement with cement stabilized embankment soil exhibited much less surface cracking than the pavement with fly-ash stabilized embankment. The commercial product proved not to be effective in stabilizing the non-sulfate clayey soil used in this experiment, when the embankment is constructed at the same moisture content and compaction level as for the other three chemicals. The unconfined compression strength measured on laboratory prepared samples of soil stabilized with the commercial chemical compound was very similar to that of the untreated soil.
Author: Hani G. Melhem
Publisher:
ISBN:
Category : Pavements
Languages : en
Pages : 104
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Author: Hani G. Melhem
Publisher:
ISBN:
Category : Pavements
Languages : en
Pages : 68
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The objective of the research was to compare the performance of fiber reinforced and plain Portland Cement Concrete (PCC) overlay when used as a thin non-dowelled overlay on top of a rubblized, distressed concrete pavement. The experiment was conducted at the Accelerated Testing Laboratory at Kansas State University, and consisted of constructing two pavements and subjecting them to full-scale accelerated pavement test. The pavements were constructed in the environmental pit so that heat-cool temperature cycles were imposed. The two pavements were subjected to 500,000 full-truck axle passes. Stresses and strains at several locations in the two pavements, as well as the expansion/contraction of the slabs, were periodically recorded during the test. The stress-strain data, as well as the location, severity and extent of the cracking in the overlay, clearly indicate that there is no benefit of including the plastic fibers in the concrete overlay. The full-scale accelerated test revealed that the thin non-dowelled overlays are effective when used on top of distressed, rubblized concrete pavements.
Author: Stefan Romanoschi
Publisher:
ISBN:
Category : Pavements
Languages : en
Pages : 164
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This report covers the Fiscal Year 2002 project conducted at the Accelerated Testing Laboratory at Kansas State University. The project was selected and funded by the Midwest Accelerated Testing Pooled Fund Program, which includes Iowa, Kansas, Missouri and Nebraska. The objective of this research was to determine the effectiveness of the use of foamed asphalt stabilized Recycled Asphalt Pavement from full-depth reclamation (FAS-FDR) as base material for flexible pavements. The experiment consisted of constructing four pavements, one with a 9-in. conventional Kansas AB-3 granular base and three with 6-, 9-, and 12-in. FAS-FDR, and subjecting them to full-scale accelerated pavement test.
Author: José P. Aguiar-Moya
Publisher: Springer
ISBN: 3319427970
Category : Technology & Engineering
Languages : en
Pages : 877
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Book Description
This compendium gathers the latest advances in the area of Accelerated Pavement Testing (APT), a means of testing full-scale pavement construction in an accelerated manner for structural deterioration in a very short term. Compiling novel research results presented at the 5th International Conference on Accelerated Pavement Testing, San Jose, Costa Rica, the volume serves as a timely and highly relevant resource for materials scientists and engineers interested in determining the performance of a pavement structure during its service life (10+ years) in a few weeks or months.
Author: David Jones
Publisher: CRC Press
ISBN: 0203073010
Category : Technology & Engineering
Languages : en
Pages : 560
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Book Description
Pack: Book and CDInternationally, full-scale accelerated pavement testing, either on test roads or linear/circular test tracks, has proven to be a valuable tool that fills the gap between models and laboratory tests and long-term experiments on in-service pavements. Accelerated pavement testing is used to improve understanding of pavement behavior,
Author: W. Ronald Hudson
Publisher:
ISBN:
Category : Pavements
Languages : en
Pages : 72
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Author: United States. Congress. House. Committee on Appropriations. Subcommittee on Department of Transportation and Related Agencies Appropriations
Publisher:
ISBN:
Category : United States
Languages : en
Pages : 1418
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Author: United States. Congress. House. Committee on Appropriations. Subcommittee on Dept. of Transportation and Related Agencies Appropriations
Publisher:
ISBN:
Category : United States
Languages : en
Pages : 1390
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Author: National Cooperative Highway Research Program
Publisher:
ISBN:
Category : Highway engineering
Languages : en
Pages : 416
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