Download or read book Flexible Pavement Deflection written by Jerome J. Thomas and published by . This book was released on 1968 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Flexible Pavement Performance Evaluation Using Deflection Criteria written by R. J. Wedner and published by . This book was released on 1980 with total page 126 pages. Available in PDF, EPUB and Kindle. Book excerpt: Project monitored flexible pavement dynamic deflections, roughness, and distress over a six-year period. Results show present surface condition and serve as a basis for evaluating rehabilitation needs.

Download or read book Properties of Flexible Pavement Materials written by John J. Emery and published by ASTM International. This book was released on 1983 with total page 198 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Deflection Analysis of Flexible Pavements written by Gordon Peterson and published by . This book was released on 1972 with total page 164 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Flexible Pavement Deflection Equation Using Elastic Moduli and Field Measurements written by Robert L. Lytton and published by . This book was released on 1979 with total page 50 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Statewide Flexible Pavement Performance and Deflection Study written by and published by . This book was released on 1978 with total page 142 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Certain Requirements for Flexible Pavement Design for B 29 Planes written by Waterways Experiment Station (U.S.) and published by . This book was released on 1945 with total page 288 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Deflections as an Indicator of Flexible Pavement Performance written by Frank Patterson Nichols and published by . This book was released on 1962 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Estimation of Remaining Service Life of Flexible Pavements from Surface Deflections written by Daba Shabara Gedafa and published by . This book was released on 2008 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Remaining service life (RSL) has been defined as the anticipated number of years that a pavement will be functionally and structurally acceptable with only routine maintenance. The Kansas Department of Transportation (KDOT) has a comprehensive pavement management system, network optimization system (NOS), which uses the RSL concept. In support of NOS, annual condition surveys are conducted on the state highway system. Currently KDOT uses an empirical equation to compute RSL of flexible pavements based on surface condition and deflection from the last sensor of a falling-weight deflectometer (FWD). Due to limited resources and large size, annual network-level structural data collection at the same rate as the project level is impractical. A rolling-wheel deflectometer (RWD), which measures surface deflections at highway speed, is an alternate and fast method of pavement-deflection testing for network-level data collection. Thus, a model that can calculate RSL in terms of FWD first sensor/center deflection (the only deflection measured by RWD) is desired for NOS. In this study, RWD deflection data was collected under an 18-kip axle load at highway speed on non-Interstate highways in northeast Kansas in July 2006. FWD deflection data, collected with a Dynatest 8000 FWD on the KDOT network from 1998 to 2006, were reduced to mile-long data to match the condition survey data collected annually for NOS. Normalized and temperature-corrected FWD and RWD center deflections and corresponding effective structural numbers (SNeff) were compared. A nonlinear regression procedure in Statistical Analysis Software (SAS) and Solver in Microsoft Excel were used to develop the models in this study. Results showed that FWD and RWD center deflections and corresponding SNeff are statistically similar. Temperature-correction factors have significant influence on these variables. FWD data analysis on the study sections showed that average structural condition of pavements of the KDOT non-Interstate network did not change significantly over the last four years. Thus, network-level deflection data can be collected at four-year intervals when there is no major structural improvement. Results also showed that sigmoimal relationship exists between RSL and center deflection. Sigmoidal RSL models have very good fits and can be used to predict RSL based on center deflection from FWD or RWD. Sigmoidal equivalent fatigue crack-models have also shown good fits, but with some scatter that can be attributed to the nature and quality of the data used to develop these models. Predicted and observed equivalent transverse-crack values do not match very well, though the difference in magnitude is insignificant for all practical purposes.

Download or read book The Benkelman Beam Principle of Flexible Pavement Deflection Measurements written by Philip Michael Kalyta and published by . This book was released on 1983 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Investigations of Pressures and Deflections for Flexible Pavements written by Waterways Experiment Station (U.S.) and published by . This book was released on 1951 with total page 340 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Flexible Pavement Design and Performance Studies 1962 written by National Research Council (U.S.). Highway Research Board and published by . This book was released on 1962 with total page 104 pages. Available in PDF, EPUB and Kindle. Book excerpt: Paper 1 reports the test methods used and results obtained in evaluating the performance of 115 mi of flexible pavement. Paper 3 describes some aspects of theoretical and experimental work carried out in South Africa, over the past four years, in a study of 'chicken net' cracking of a road surfacing, and of the flexure induced in it by wheel loads. Paper 4 evaluates design procedures presently in use in South Dakota. Paper 5: A method was developed using the Benkelman beam to measure deflection of the individual layers of the pavement structure.

Download or read book Symposium on Flexible Pavement Behavior as Related to Deflection written by Carl L. Monismith and published by . This book was released on 1962 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Analysis of Flexible Pavement on the Basis of Deflection Basins written by Dinesh M. Kamath and published by . This book was released on 1987 with total page 146 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Simplified Techniques for Evaluation and Interpretation of Pavement Deflections for Network level Analysis written by and published by . This book was released on 2012 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt: The objective of this study was to develop an approach for incorporating techniques to interpret and evaluate deflection data for network-level pavement management system (PMS) applications. The first part of this research focused on identifying and evaluating existing techniques, seeking out those that were simple, reliable, and easy to incorporate into current PMS practices, as well as those that produced consistent results. The second part of the research detailed the development of guidelines for the application of recommended techniques and procedures for determining optimum falling weight deflectometer (FWD) test spacing and data collection frequency. While there are many viable techniques available for evaluating the structural capacity of pavements that use FWD for project-level analysis, many of these techniques are time consuming and require an experienced analyst. As a result, using pavement deflection testing for network-level analysis has been limited to date. This guide provides information for the assessment of pavement structural performance for PMS applications. It reflects the general findings presented in the accompanying final report, Simplified Techniques for Evaluation and Interpretation of Pavement Deflections for Network-Level Analysis (FHWA-HRT-12-023).

Download or read book A demonstration project on instrumentation of a flexible pavement written by Shad M. Sargand and published by . This book was released on 1996 with total page 108 pages. Available in PDF, EPUB and Kindle. Book excerpt: An instrumentation plan and installation techniques were developed for a full-scale asphalt concrete test pavement. Six asphalt pavement test sections were constructed over an asphalt-treated base, cement-treated base, New Jersey base, Iowa base, 8 inch 304 base and 6 inch 304 base. Upon completion of test sections, moisture, temperature, vertical deflections, pressures, and strains were measured as the pavement was subjected to non-destructive testing. Data were compared to predictions of a finite element model. Field data indicate that the deflection of asphalt with asphalt treated base varies significantly with change in temperature. Deflection of the pavement over cement-treated base was the lowest. Among the non-treated bases, the bases with the larger aggregate experienced less deflection. The OU-PAVE finite element program predicted with reasonable accuracy maximum deflection and the deflection profile.

Download or read book Properties of Flexible Pavement Materials written by and published by ASTM International. This book was released on with total page 189 pages. Available in PDF, EPUB and Kindle. Book excerpt: