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Back Calculation Of Layer Parameters For Ltpp Test Sections Layered Elastic Analysis For Flexible And Rigid Pavements
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Book Synopsis Back-calculation of Layer Parameters for LTPP Test Sections by : Harold L. Von Quintus
Download or read book Back-calculation of Layer Parameters for LTPP Test Sections written by Harold L. Von Quintus and published by DIANE Publishing. This book was released on 2002 with total page 146 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Back-calculation of Layer Parameters for LTPP Test Sections: Layered elastic analysis for flexible and rigid pavements by :
Download or read book Back-calculation of Layer Parameters for LTPP Test Sections: Layered elastic analysis for flexible and rigid pavements written by and published by . This book was released on 2001 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Vol. 1 documents the results of backcalculation of layer material properties for rigid pavements included in the Long Term Pavement Performance (LTPP) program in the United States and Canada using deflection testing data. Vol. 2documents the procedure and steps used to back-calculate the layered elastic properties (Young's modulus and the coefficient and exponent of the nonlinear constitutive equation) from deflection basin measurements for all of the Long-Term Pavement Performance (LTPP) test sections with a level E data status.
Book Synopsis Backcalculation of layer parameters for LTPP test sections by :
Download or read book Backcalculation of layer parameters for LTPP test sections written by and published by DIANE Publishing. This book was released on with total page 274 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Nondestructive Testing of Pavements and Backcalculation of Moduli by : Shiraz D. Tayabji
Download or read book Nondestructive Testing of Pavements and Backcalculation of Moduli written by Shiraz D. Tayabji and published by ASTM International. This book was released on 2000 with total page 534 pages. Available in PDF, EPUB and Kindle. Book excerpt: As with the previous two symposia, the 32 papers from the June/July, 1999, Seattle symposium present advances in the nondestructive testing of pavements using conventional falling weight deflectometer techniques and other promising techniques such as ground penetrating radar, rolling weight deflecto
Book Synopsis CTD measurements during 1999 and 2000 as part of the Global OceanAtmosphereLand System (GOALS)/Pan American Climate Studies (PACS) by :
Download or read book CTD measurements during 1999 and 2000 as part of the Global OceanAtmosphereLand System (GOALS)/Pan American Climate Studies (PACS) written by and published by DIANE Publishing. This book was released on with total page 128 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Focus written by and published by . This book was released on 2001 with total page 344 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Guidance, Parameters, and Recommendations for Rubblized Pavements by :
Download or read book Guidance, Parameters, and Recommendations for Rubblized Pavements written by and published by . This book was released on 2007 with total page 90 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Evaluation of Intelligent Compaction Technology for Densification of Roadway Subgrades and Structural Layers by :
Download or read book Evaluation of Intelligent Compaction Technology for Densification of Roadway Subgrades and Structural Layers written by and published by . This book was released on 2010 with total page 178 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Bearing Capacity of Roads, Railways and Airfields by : Andreas Loizos
Download or read book Bearing Capacity of Roads, Railways and Airfields written by Andreas Loizos and published by CRC Press. This book was released on 2017-07-20 with total page 3209 pages. Available in PDF, EPUB and Kindle. Book excerpt: Bearing Capacity of Roads, Railways and Airfields includes the contributions to the 10th International Conference on the Bearing Capacity of Roads, Railways and Airfields (BCRRA 2017, 28-30 June 2017, Athens, Greece). The papers cover aspects related to materials, laboratory testing, design, construction, maintenance and management systems of transport infrastructure, and focus on roads, railways and airfields. Additional aspects that concern new materials and characterization, alternative rehabilitation techniques, technological advances as well as pavement and railway track substructure sustainability are included. The contributions discuss new concepts and innovative solutions, and are concentrated but not limited on the following topics: · Unbound aggregate materials and soil properties · Bound materials characteritics, mechanical properties and testing · Effect of traffic loading · In-situ measurements techniques and monitoring · Structural evaluation · Pavement serviceability condition · Rehabilitation and maintenance issues · Geophysical assessment · Stabilization and reinforcement · Performance modeling · Environmental challenges · Life cycle assessment and sustainability Bearing Capacity of Roads, Railways and Airfields is essential reading for academics and professionals involved or interested in transport infrastructure systems, in particular roads, railways and airfields.
Download or read book Public Roads written by and published by . This book was released on 2001 with total page 764 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Backcalculation of Layer Parameters for LTPP Test Sections by : Lev Khazanovich
Download or read book Backcalculation of Layer Parameters for LTPP Test Sections written by Lev Khazanovich and published by . This book was released on 2001 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: "This report documents the results of backcalculation of layer material properties for rigid pavements included in the Long Term Pavement Performance (LTPP) program in the United States and Canada using deflection testing data. This study backcalculated the layer material properties for rigid pavements using the slab on elastic solid foundation and the slab on dense-liquid foundation procedures. The "best fit" algorithm was used after consideration of alternative methods of backcalculation. Pre-processing and post-processing utility software were developed to facilitate data handling. The backcalculation analysis was conducted for all General Pavement Studies (GPS), Special Pavement Studies (SPS), and Seasonal Monitoring Program (SMP) test sections. Data tables that include backcalculation parameters were developed for inclusion in the LTPP Information Management System (IMS). Key findings include the following: 1. The "best-fit" method was selected as the primary backcalculation method for both dense-liquid (DL) and elastic solid (ES) subgrade models. 2. Reasonable backcalculation results were obtained for the large majority of GPS, SPS, and SMP sections. Typical modulus values and ranges are provided for the PCC slab, many types of bases, and the subgrade. 3. Strong correlations were found between backcalculated parameters using DL and ES subgrade models. 4. Temperature curling during the day had a profound effect on the results of backcalculation [making it important to conduct falling weight deflectometer (FWD) basin testing early in the morning to reduce variability in backcalculated values]. 5. Poor correlation was found between backcalculated and laboratory elastic moduli of the concrete slab. 6. A bonded interface between the slab and base produced the best layer moduli for a large majority of the sections (center slab backcalculation)"--Tech. report doc. page.
Book Synopsis Backcalculation of Layer Parameters for LTPP Test Sections by : Lev Khazanovich
Download or read book Backcalculation of Layer Parameters for LTPP Test Sections written by Lev Khazanovich and published by . This book was released on 2001 with total page 115 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Monthly Catalog of United States Government Publications by :
Download or read book Monthly Catalog of United States Government Publications written by and published by . This book was released on 2003 with total page 882 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Long-term Pavement Performance Program Determination of In-place Elastic Layer Modulus by : Harold L. Von Quintus
Download or read book Long-term Pavement Performance Program Determination of In-place Elastic Layer Modulus written by Harold L. Von Quintus and published by . This book was released on 2015 with total page 182 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Long-Term Pavement Performance (LTPP) database includes deflection basins measured on thousands of test sections across the United States. These deflection data were used to backcalculate the elastic layer modulus of both flexible and rigid pavements. This report documents the tools, data analyses, backcalculation and forward calculation packages, and procedures used to calculate the in-place elastic layer modulus of the LTPP test sections. It summarizes the backcalculated elastic layered modulus of both new and rehabilitated flexible and rigid pavements in the LTPP program and demonstrates their use in day-to-day practice for pavement design, rehabilitation, and management. Many agencies have used the LTPP deflection data for calibrating mechanistic-empirical distress transfer functions, including those in the Mechanistic-Empirical Pavement Design Guide.
Book Synopsis Determination of Pavement Layer Stiffness on the Ohio SHRP Test Road Using Non-destructive Testing Techniques by : Shad M. Sargand
Download or read book Determination of Pavement Layer Stiffness on the Ohio SHRP Test Road Using Non-destructive Testing Techniques written by Shad M. Sargand and published by . This book was released on 2002 with total page 184 pages. Available in PDF, EPUB and Kindle. Book excerpt: In 1994-96, the Ohio Department of Transportation (ODOT) constructed a 3.5-mile long test pavement on US 23 in Delaware County for the Strategic Highway Research Program. This project contained a total of 40 test sections of asphalt concrete and Portland cement concrete pavement in the SPS-1, SPS-2, SPS-8 and SPS-9 experiments of the Specific Pavement Studies program. These experiments were designed to assess the effectiveness of different base types and thicknesses, different pavement thicknesses and other design parameters on the structural performance of highway pavements. During the construction of these sections, the Falling Weight Deflectometer (FWD) was used to measure the composite stiffness of the sections as each new material layer was completed and accepted by ODOT. In addition, the Dynaflect trailer was used to measure the composite stiffness of the completed sections prior to their being opened to traffic. The overall objectives of this research study were to evaluate the stiffness of the test sections on this experimental pavement as the new material layers were added to the sections, and to evaluate various analysis software packages currently available for the backcalculation of layer moduli. While the Ohio SHRP Test Road was constructed in an area of flat terrain believed to have relatively uniform subgrade, FWD measurements indicated considerable subgrade variability between sections and within individual sections. None of the subgrade sections was considered to be good, about half were fair and the other half were poor to very poor. As expected, much of the variability was mitigated as successive material layers were placed in the sections, and especially with the addition of stabilized materials. Stiffness equivalencies were developed for the six types of base material used on the test road, and for AC and PCC pavement used on these bases. The final stiffness of the completed sections was consistent with early performance, in that the first six asphalt concrete sections which failed had the highest measured deflections with both the FWD and Dynaflect just prior to being opened to traffic. An excellent correlation was developed between FWD and Dynaflect output on the completed asphalt concrete pavement sections and clear trends were also apparent on PCC pavement, though the limited range of readings on PCC with both devices made it difficult to develop a definitive correlation on rigid pavement. The stiffness of the completed AC and PCC pavement sections, and load transfer across PCC pavement joints were quite similar when measured with the FWD and Dynaflect, demonstrating the usefulness of both instruments in evaluating structural performance. Four elastic layer programs were evaluated for their ability to calculate the moduli of the various material layers in the 40 test sections. Of these, MODULUS 4.2 performed the best and was the most user friendly program to run. To obtain consistent results on any specific project, a standard operating procedure needs to be developed for those conditions and the analysis program being used, and the procedure needs to be closely followed for all calculations.
Book Synopsis Seasonal Variations of in Situ Materials Properties in New York State by : David Paul Orr
Download or read book Seasonal Variations of in Situ Materials Properties in New York State written by David Paul Orr and published by . This book was released on 2005 with total page 946 pages. Available in PDF, EPUB and Kindle. Book excerpt:
