Download or read book Catalog of Material Properties for Mechanistic empirical Pavement Design written by Rui Li and published by . This book was released on 2011 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Mechanistic empirical Pavement Design Guide written by American Association of State Highway and Transportation Officials and published by AASHTO. This book was released on 2008 with total page 218 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Material Properties for Implementation of Mechanistic empirical M E Pavement Design Procedures in Ohio written by Basel A. Abdalla and published by . This book was released on 2003 with total page 464 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Asphalt Material Design Inputs for Use with the Mechanistic empirical Pavement Design Guide in Virginia written by Alex K. Apeagyei and published by . This book was released on 2011 with total page 79 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Guide for the Mechanistic-Empirical Design of New & Rehabilitated Pavement Structures (MEPDG), developed under NCHRP Project 1-37A and recently adopted by the American Association of State Highway and Transportation Officials (AASHTO), offers an improved methodology for pavement design and evaluation. To achieve this improved prediction capability, the MEPDG procedure requires fundamental material properties in addition to certain empirically determined binder and mixture properties as design inputs. One of the key tasks identified by the Virginia Department of Transportation's (VDOT) Asphalt Concrete MEPDG Committee was the laboratory characterization of asphalt mixtures commonly used in Virginia to generate a catalog of the MEPDG-required design inputs. The purpose of this study was to evaluate, compile, and present asphalt material properties in a format that could be readily used in the MEPDG software and to develop a comprehensive catalog of MEPDG design input parameters for pavement design in Virginia. To achieve this objective, 18 asphalt concrete mixtures, sampled from seven of the nine VDOT districts, were tested using a battery of MEPDG-required tests including dynamic modulus (E*), flow number (FN), creep compliance, tensile strength, and beam fatigue tests. Testing involving binder and volumetric properties of the mixtures was also conducted. Finally, rut tests using the asphalt pavement analyzer (APA), a standard VDOT test protocol, were conducted to enable a direct comparison of the APA and FN test results. On the basis of these tests, suggestions for additional studies were made. The results of the study were presented in a form matching the MEPDG input format, and a catalog of design input parameters was developed for the 18 asphalt concrete mixtures. Included in the catalog were binder stiffness, mixture E*, mixture gradation, and mixture volumetric properties that would enable a designer the flexibility to select the desired input level (1, 2, or 3) depending on the pavement type. An illustrative example of how the developed inputs could be implemented using the MEPDG software was also provided. The results showed that E* master curves of asphalt mixtures obtained using the five standard testing temperatures described in AASHTO TP 62 could be obtained by testing at only three temperatures, which could result in a substantial reduction of testing time. The results also showed that the FN test was a sensitive test for evaluating rutting susceptibility of asphalt mixtures in the laboratory. The FN test was found to be sensitive to binder stiffness, mixture stiffness, mixture volumetric properties, aggregate gradation, and amount of recycled asphalt pavement (RAP) for the mixtures considered in this study. The study recommends that the catalog of input data for typical asphalt mixtures developed in this study be considered for pavement design in Virginia. The data followed expected trends and compared quite well with those reported in previous studies. Further studies should be conducted to evaluate the FN test as an additional tool for evaluating rutting in asphalt mixtures. Mixtures containing higher amounts of RAP (>20%) exhibited comparatively lower rutting resistance than those with 20% or less RAP. This phenomenon was unexpected since it is generally believed that adding more RAP should result in stiffer and hence more rut-resistant mixtures. Additional research should be conducted to investigate this phenomenon further.
Download or read book Material Properties for Implementation of Mechanistic empirical M E Pavement Design Procedures written by and published by . This book was released on 2004 with total page 322 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Analysis of the Mechanistic empirical Pavement Design Guide Performance Predictions written by Stacey D. Diefenderfer and published by . This book was released on 2010 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Guide for Mechanistic-Empirical Design of New and Rehabilitated Pavement Structures (MEPDG) is an improved methodology for pavement design and the evaluation of paving materials. The Virginia Department of Transportation (VDOT) is expecting to transition to using the MEPDG methodology in the near future. The purpose of this research was to support this implementation effort. A catalog of mixture properties from 11 asphalt mixtures (3 surface mixtures, 4 intermediate mixtures, and 4 base mixtures) was compiled along with the associated asphalt binder properties to provide input values. The predicted fatigue and rutting distresses were used to evaluate the sensitivity of the MEPDG software to differences in the mixture properties and to assess the future needs for implementation of the MEPDG. Two pavement sections were modeled: one on a primary roadway and one on an interstate roadway. The MEPDG was used with the default calibration factors. Pavement distress data were compiled for the interstate and primary route corresponding to the modeled sections and were compared to the MEPDG-predicted distresses. Predicted distress quantities for fatigue cracking and rutting were compared to the calculated distress model predictive errors to determine if there were significant differences between material property input levels. There were differences between all rutting and fatigue predictions using Level 1, 2, and 3 asphalt material inputs, although not statistically significant. Various combinations of Level 3 inputs showed expected trends in rutting predictions when increased binder grades were used, but the differences were not statistically significant when the calibration model error was considered. Pavement condition data indicated that fatigue distress predictions were approximately comparable to the pavement condition data for the interstate pavement structure, but fatigue was over-predicted for the primary route structure. Fatigue model predictive errors were greater than the distress predictions for all predictions. Based on the findings of this study, further refinement or calibration of the predictive models is necessary before the benefits associated with their use can be realized. A local calibration process should be performed to provide calibration and verification of the predictive models so that they may accurately predict the conditions of Virginia roadways. Until then, implementation using Level 3 inputs is recommended. If the models are modified, additional evaluation will be necessary to determine if the other recommendations of this study are impacted. Further studies should be performed using Level 1 and Level 2 input properties of additional asphalt mixtures to validate the trends seen in the Level 3 input predictions and isolate the effects of binder grade changes on the predicted distresses. Further, additional asphalt mixture and binder properties should be collected to populate fully a catalog for VDOT's future implementation use. The implementation of these recommendations and use of the MEPDG are expected to provide VDOT with a more efficient and effective means for pavement design and analysis. The use of optimal pavement designs will provide economic benefits in terms of initial construction and lifetime maintenance costs.
Download or read book Material Properties for Implementation of Mechanistic empirical Rigid Pavement Design Procedure Design Guide 2002 in Alberta written by Mircea Istrățescu and published by . This book was released on 2006 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Characterization of Material Properties for Mechanistic empirical Pavement Design in Wyoming written by University of Wyoming. Department of Civil and Architectural Engineering and published by . This book was released on 2016 with total page 101 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Wyoming Department of Transportation (WYDOT) recently transitioned from the empirical AASHTO Design for Design of Pavement Structures to the Mechanistic Empirical Pavement Design Guide (MEPDG) as their standard pavement design procedure. A comprehensive field and laboratory test program was conducted in Wyoming to characterize the properties of unbound soil materials. The field test program included falling weight deflectometer (FWD), dynamic cone penetration (DCP), standard penetration test (SPT), soil sampling and pavement distress survey. The laboratory test program included standard soil classification tests, R-value test, standard Proctor compaction test, and resilient modulus (Mr) test in accordance with a protocol by modifying the AASHTO T-307 procedure. All test data was stored and managed by an electronic WYOming MEPDG Database (WYOMEP). Using the FWD data, in-place resilient modulus (MR) of each pavement layer was back-calculated using MODCOMP6 and EVERCALC. For MEPDD Level 2 input, correlation studies were performed to adjust back-calculated modulus to laboratory-derived modulus, calibrate constitutive models, develop relationships between resilient modulus and other soil properties, and develop Mr design tables. Furthermore, tables of unbound soil properties were established for MEPDG Level 3 input. Finally, seven pavement designs were evaluated and compared to achieve the target threshold values and reliability level. The design comparisons and resulting outcomes or predicted distresses for a range of new pavement and rehabilitation designs were presented. The outcomes of these trial examples were used to provide revisions to the 2012 WYDOT MEPDG User Guide.
Download or read book NHI Catalog written by National Highway Institute (U.S.) and published by . This book was released on 2009 with total page 292 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Sensitivity of Thermal Properties of Pavement Materials Using Mechanistic empirical Pavement Design Guide written by Satish Reddy Chintakunta and published by . This book was released on 2007 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Review of the New Mechanistic empirical Pavement Design Guide a Material Characterization Perspective written by and published by . This book was released on 2005 with total page 19 pages. Available in PDF, EPUB and Kindle. Book excerpt: Characterization of pavement materials in the three hierarchical design levels of the proposed mechanistic-empirical pavement design (MEPD) guide involves application of the dynamic modulus technique for asphalt concrete and the resilient modulus for unbound materials. This approach, if adequately implemented, is expected to improve the road design processes. The advance design level recommends using actual laboratory test data of the dynamic and resilient modulus determined under simulated environmental and traffic loading conditions. To circumvent the need for conducting the mechanical test in lower design levels, predictive equations and correlations established with physical properties are used to estimate the mechanistic properties needed as input to the design software. This paper examines the simplifications incorporated in the model using results of dynamic and resilient modulus tests performed at the National Research Council Canada (NRC). For the covering abstract of this conference see ITRD number E211426.
Download or read book AASHTO Guide for Design of Pavement Structures 1993 written by American Association of State Highway and Transportation Officials and published by AASHTO. This book was released on 1993 with total page 622 pages. Available in PDF, EPUB and Kindle. Book excerpt: Design related project level pavement management - Economic evaluation of alternative pavement design strategies - Reliability / - Pavement design procedures for new construction or reconstruction : Design requirements - Highway pavement structural design - Low-volume road design / - Pavement design procedures for rehabilitation of existing pavements : Rehabilitation concepts - Guides for field data collection - Rehabilitation methods other than overlay - Rehabilitation methods with overlays / - Mechanistic-empirical design procedures.
Download or read book Measurement of the Resilient Modulus of Subgrade Materials for Mechanistic empirical Pavement Design Guide in Wyoming written by Zachary R. Henrichs and published by . This book was released on 2015 with total page 319 pages. Available in PDF, EPUB and Kindle. Book excerpt: To improve the pavement design and construction in Wyoming, the Wyoming Department of Transportation (WYDOT) is adopting the Mechanistic-Empirical Pavement Design Guide (MEPDG). Calibration of local subgrade materials are needed to implement the MEPDG. This thesis describes the measurement of resilient modulus (Mr) of subgrade materials and prepares a catalog of representative subgrade properties. As part of the comprehensive testing program, subgrade soil samples were collected from 12 locations throughout the state for standard laboratory tests and Mr test. A testing protocol for Mr was developed by modifying the AASHTO Designation: T-307 to incorporate WYDOT practices. Test results show that Mr changes with axial loads, confining pressures, soil types, and depths beneath the pavement. Regression models were developed using statistical methods and design charts were established for estimating Mr-values. The outcomes of this research will facilitate the full implementation of the MEPDG in the state of Wyoming.
Download or read book NHI Training Catalog written by National Highway Institute (U.S.) and published by . This book was released on 2006 with total page 208 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Characterizing Seasonal Variations in Pavement Material Properties for Use in a Mechanistic empirical Design Procedure written by Jill Marie Ovik and published by . This book was released on 1998 with total page 340 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Characterizing Seasonal Variations in Pavement Material Properties for Use in a Mechanistic empirical Design Procedure written by Jill M. Ovik and published by . This book was released on 2000 with total page 238 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Development of Concrete Mechanical Properties Database for Pavement Mechanistic empirical Input written by Davis Kenneth Wing and published by . This book was released on 2019 with total page 308 pages. Available in PDF, EPUB and Kindle. Book excerpt: Traditionally, pavements have been designed using empirical relationships with equations derived from observed pavement failures. Recently, the design of pavements using mechanistic approaches based on known material properties of pavement materials has become an industry expectation. Specifically, a program, AASHTOWare's Pavement ME, incorporates both mechanistic and empirical understandings of pavements in order to design and predict long-term pavement distresses. This thesis aims to develop a concrete materials database for mechanical properties specific to Georgia's rigid pavements. This database includes laboratory tested values of compressive strength, Young's modulus, modulus of rupture, and ultimate shrinkage. Twelve Georgia Department of Transportation (GDOT) approved concrete mixtures using Georgia specific concrete materials were batched, tested, and analyzed for these properties. Additionally, this thesis investigates which of these properties are most critical in rigid pavement design through sensitivity analysis conducted with Pavement ME at Input Level's 1, 2, and 3. Ultimately, this study provides design recommendations for critical mechanical properties as well as guidance for which Input Level to use for the design of Georgia rigid pavements.
