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Author :
Publisher : DIANE Publishing
ISBN 13 : 1428995684
Total Pages : 274 pages
Book Rating : 4.4/5 (289 download)
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:
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.
Author : Lev Khazanovich
Publisher :
ISBN 13 :
Total Pages : 115 pages
Book Rating : 4.:/5 (475 download)
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:
Author : Lev Khazanovich
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (463 download)
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.
Author : Harold L. Von Quintus
Publisher : DIANE Publishing
ISBN 13 : 1428995366
Total Pages : 146 pages
Book Rating : 4.4/5 (289 download)
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:
Download or read book Back Calculation Of Layer Parameters For LTPP Test Sections, Volume I: Slab On Elastic Solid And Slab On Dense-Liquid ..., Publication No. FHWA-RD-00-086 ... U.s. Department Of Transportation written by and published by . This book was released on 2001 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher : DIANE Publishing
ISBN 13 : 1428995676
Total Pages : 128 pages
Book Rating : 4.4/5 (289 download)
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:
Author :
Publisher :
ISBN 13 :
Total Pages : 784 pages
Book Rating : 4.E/5 ( download)
Download or read book Public Roads written by and published by . This book was released on 1999 with total page 784 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Andreas Loizos
Publisher : CRC Press
ISBN 13 : 1351585797
Total Pages : 364 pages
Book Rating : 4.3/5 (515 download)
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 364 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.
Author : Shiraz D. Tayabji
Publisher : ASTM International
ISBN 13 : 0803128584
Total Pages : 534 pages
Book Rating : 4.8/5 (31 download)
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
Author : Erol Tutumluer
Publisher : CRC Press
ISBN 13 : 0203865286
Total Pages : 1560 pages
Book Rating : 4.2/5 (38 download)
Download or read book Bearing Capacity of Roads, Railways and Airfields, Two Volume Set written by Erol Tutumluer and published by CRC Press. This book was released on 2009-06-15 with total page 1560 pages. Available in PDF, EPUB and Kindle. Book excerpt: Bearing Capacity of Roads, Railways and Airfields focuses on issues pertaining to the bearing capacity of highway and airfield pavements and railroad track structures and provided a forum to promote efficient design, construction and maintenance of the transportation infrastructure. The collection of papers from the Eighth International Conference
Author : Agnieszka Jędrzejewska
Publisher : Springer Nature
ISBN 13 : 3031332113
Total Pages : 1363 pages
Book Rating : 4.0/5 (313 download)
Download or read book International RILEM Conference on Synergising Expertise towards Sustainability and Robustness of Cement-based Materials and Concrete Structures written by Agnieszka Jędrzejewska and published by Springer Nature. This book was released on 2023-06-10 with total page 1363 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book highlights the latest advances, innovations, and applications in cement-based materials (CBM) and concrete structures, as presented by leading international researchers and engineers at the International RILEM Conference on synergizing expertise toward sustainability and robustness of CBM and concrete structures (SynerCrete), held in Milos Island, Greece, on June 14-16, 2023. The aim of the conference was to discuss and arouse progress in research, development, and application of CBM and structural concrete through combination of expertise from distinct fields of knowledge, such as performance-based design, 3D modeling for analysis/design, building information modeling, and even robotics, while keeping focus on multiscale approaches at time and spatial levels. It covers a diverse range of topics concerning alternative concrete formulations for adaptation to climate change, performance-based and multiphysics/multiscale design and innovative testing, structural health monitoring and maintenance management, integral BIM-based planning, and resource-responsible building. The contributions, which were selected by means of a rigorous international peer-review process, present a wealth of exciting ideas that will open novel research directions and foster new multidisciplinary collaborations. The two volumes encompass more than 200 original contributions in the field.
Author : A. T. Papagiannakis
Publisher : John Wiley & Sons
ISBN 13 : 1394150180
Total Pages : 660 pages
Book Rating : 4.3/5 (941 download)
Download or read book Pavement Design and Materials written by A. T. Papagiannakis and published by John Wiley & Sons. This book was released on 2024-05-29 with total page 660 pages. Available in PDF, EPUB and Kindle. Book excerpt: Practical guide for all aspects of pavement engineering, updated with the latest techniques, standards, and software The newly revised and updated Second Edition of Pavement Design and Materials offers a comprehensive treatment of pavement materials, structural analysis, design, evaluation, and economic analysis of asphalt and portland concrete pavements. Written by two highly qualified engineering professors with a wealth of experience in the field, Pavement Design and Materials provides readers with: State-of-the-art techniques for material characterization, including a linear viscoelasticity primer Methods and software for the analysis of flexible and ridgid pavements including the AASHTOWare Pavement ME Design State-of-the-art pavement evaluation techniques including moduli backcalculation methods Pavement economic analysis techniques including the most up-to-date user cost relationships. The book companion website provides: Solved examples in each chapter and the electronic files associated with them An instructor solutions manual for the problems provided at the end of each chapter PowerPoint presentations by chapter to facilitate lecture delivery Pavement Design and Materials is an essential up-to-date textbook on the subject for upper-level undergraduate and graduate level courses on pavement materials and pavement design. It is also a valuable reference for practicing professional engineers involved in the various aspects of roadway pavement material selection and structural design.
Author : Shad M. Sargand
Publisher :
ISBN 13 :
Total Pages : 184 pages
Book Rating : 4.3/5 (555 download)
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.
Author : EO. Lukanen
Publisher :
ISBN 13 :
Total Pages : 16 pages
Book Rating : 4.:/5 (125 download)
Download or read book Variations in Backcalculated Pavement Layer Moduli in LTPP Seasonal Monitoring Sites written by EO. Lukanen and published by . This book was released on 2000 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt: Seasonal variations in structural parameters were calculated from Falling Weight Deflectometer data on 25 LTPP flexible seasonal monitoring sections. In all, 23,976 deflection basins were analyzed. The deflection basins were collected monthly between the fall of 1993 and the spring of 1995. The test locations were distributed around North America from Saskatchewan to South Texas and from Idaho to Maine. The sections all consisted of asphalt surfacing and granular bases (and some granular subbases) over subgrades. Asphalt thicknesses ranged from 46 to 277\mm. Seasonal variations observed on selected sections in this database and documented in this paper include variations in asphaltic materials with temperature, variations in moduli of the unbound materials with precipitation, and variations in moduli of unbound materials due to freeze/thaw. For moderately thick to thick asphalt sections (>125 mm) the temperature dependency can clearly be seen in the deflection basins. As expected, this variation in deflections, and AC modulus is sinusoidal over the year. The amplitude of the sinusoidal variations were found to be heavily influenced by the thickness of the AC layer. Thicker AC sections exhibited higher sinusoidal variations. Base and subgrade values tended to be influenced by temperature but remained more consistent throughout the year except in cases where freezethaw effects were seen. During freeze conditions, the moduli of the unbound (base and subgrade) layers drastically increased.
Author : Kurt D. Smith
Publisher :
ISBN 13 :
Total Pages : 228 pages
Book Rating : 4.:/5 (1 download)
Download or read book Concrete Pavement Preservation Workshop written by Kurt D. Smith and published by . This book was released on 2008 with total page 228 pages. Available in PDF, EPUB and Kindle. Book excerpt: This document serves as the Reference Manual for the 1 1/2 -day FHWA workshop on concrete pavement preservation. The purpose of the document is to provide the most up-to-date information available on the design, construction, and selection of cost-effective concrete pavement preservation strategies. It concentrates primarily on strategies and methods that are applicable at the project level, and not at the network level, where pavement management activities function and address such issues as prioritizing and budgeting. Detailed information is presented on seven specific concrete pavement preservation treatments: slab stabilization, partial-depth repairs, full-depth repairs, retrofitted edge drains, load transfer restoration, diamond grinding, and joint resealing. In addition, information is provided on pavement evaluation techniques and strategy selection procedures.
Author : Yigong Ji
Publisher :
ISBN 13 :
Total Pages : 676 pages
Book Rating : 4.3/5 (129 download)
Download or read book Frequency and Time Domain Backcalculation of Flexible Pavement Layer Parameters written by Yigong Ji and published by . This book was released on 2005 with total page 676 pages. Available in PDF, EPUB and Kindle. Book excerpt:
