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Book Verification of Long term Pavement Performance Virtual Weather Stations

Download or read book Verification of Long term Pavement Performance Virtual Weather Stations written by Alaeddin Mohseni and published by . This book was released on 2006 with total page 81 pages. Available in PDF, EPUB and Kindle. Book excerpt: Within the Long-Term Pavement Performance (LTPP) program, two sources of data are used to characterize the climatic conditions for each test section. For the majority of the test sections, data for nearby national weather stations are obtained from the National Climatic Data Center (NCDC) and are used to compute estimated data for a virtual test section located at the test section. In addition, onsite instrumentation is used to obtain site-specific climatic data for the test sections included in the Seasonal Monitoring Program and for the Specific Pavement Studies (SPS) –1, –2, and –8 project sites. This report documents a study undertaken to examine the reliability and accuracy of the LTPP climatic data. The study confirmed that accurate daily, monthly, and yearly estimates of climatic data for a project location can be derived by using the NCDC weather data for several nearby weather stations. The variation in the climatic data was also characterized.

Book State Planning and Research Program

Download or read book State Planning and Research Program written by and published by . This book was released on 1999 with total page 128 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Monitoring Seasonal Instrumentation and Modeling Climatic Effects on Pavements at the Ohio SHRP Test Road

Download or read book Monitoring Seasonal Instrumentation and Modeling Climatic Effects on Pavements at the Ohio SHRP Test Road written by Andrew G. Heydinger and published by . This book was released on 2003 with total page 166 pages. Available in PDF, EPUB and Kindle. Book excerpt: Long-Term Pavement Performance (LTPP) Seasonal Monitoring program (SMP) instrumentation was installed in pavement sections at the Ohio SHRP Test Road. The pavements are monitored for the seasonal variations of moisture, temperature and frost penetration. Data from the instrumentation is subjected to quality checks and prepared for uploading to the FHWA Information Management System (IMS). Findings from the testing are to be incorporated into future pavement design procedures.

Book Guidelines for Implementing NCHRP 1 37A M E Design Procedures Literature review

Download or read book Guidelines for Implementing NCHRP 1 37A M E Design Procedures Literature review written by and published by . This book was released on 2009 with total page 126 pages. Available in PDF, EPUB and Kindle. Book excerpt: Highway agencies across the nation are moving towards implementation of the new AASHTO Mechanistic-Empirical Pavement Design Guide (MEPDG) for pavement design. The benefits of implementing the MEPDG for routine use in Ohio includes (1) achieving more cost effective and reliable pavement designs, (2) lower initial and life cycle costs to the agency, and (3) reduced highway user impact due to lane closures for maintenance and rehabilitation of pavements. Implementation of the MEPDG is a process that requires time and agency resources (staffing, training, testing facilities including equipment, and so on). A key requirement is validating the MEPDG's nationally calibrated pavement distress and smoothness prediction models when applied under Ohio conditions and performing local calibration if needed. Feasibility of using the MEPDG's national models in Ohio was investigated under this study using data from a limited number of LTPP projects located in Ohio. Results based on limited data showed inadequate goodness of fit and significant bias in a number of the MEPDG new HMA pavement and JPCP performance prediction models. Limited recalibration of these models showed promising results indicating that a full-scale recalibration effort using a more extensive database assembled from projects located throughout the state is feasible.

Book An Exploratory Study on Functionally Graded Materials with Application to Multilayered Pavement Design

Download or read book An Exploratory Study on Functionally Graded Materials with Application to Multilayered Pavement Design written by Ernian Pan and published by . This book was released on 2007 with total page 308 pages. Available in PDF, EPUB and Kindle. Book excerpt: The response of flexible pavement is largely influenced by the resilient modulus of the pavement profile. Different methods/approaches have been adopted in order to estimate or measure the resilient modulus of each layer assuming an average modulus within the layer. In order to account for the variation in the modulus of elasticity with depth within a layer in elastic pavement analysis, which is due to temperature or moisture variation with depth, the layer should be divided into several sublayers and the modulus should be gradually varied between the layers. A powerful and innovative computer program has been developed for elastic pavement analysis that overcomes the limitations of the existing pavement analysis programs. The new program can predict accurately and efficiently the response of the pavement consisted of any number of layers/sublayers and any number of loads. The complexity of the tire-pavement loading configuration can be modeled easily as well. Practical pavement engineering problems have been analyzed and discussed taking into consideration the modulus variation with depth as well as the complex tire-pavement loading configuration utilizing our newly developed MultiSmart3D program. The analyzed problems illustrated that powerful analytical tools, such as MultiSmart3D, are needed to study and predict the pavement response in practical and fast manners. For example, the predicted life time of the pavement can be increased or decreased by a factor more than two if the modulus of elasticity variation with depth is taken into consideration.

Book Ohio Documents

Download or read book Ohio Documents written by and published by . This book was released on 2003 with total page 142 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Long Term Performance Program

Download or read book Long Term Performance Program written by R. G. Hicks and published by ASCE Publications. This book was released on 2001-01-01 with total page 168 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sponsored by the Highway Division of ASCE; Long-Term Performance Program of the Federal Highway Administration. This collection contains papers from the International Contest on LTPP [Long-Term Performance Program] Data Analysis 1998-1999. This competition involved university students in the analysis of data in the LTPP database. Topics include: effect of locked-in curvature on portland cement concrete pavement; evaluation of a pavement performance prediction model using LTPP data; prediction of pavement performance?a neural network approach; and effectiveness of preventative maintenance strategies for asphalt concrete pavements based on LTPP distress data.

Book Long Term Monitoring of Moisture Under Pavements

Download or read book Long Term Monitoring of Moisture Under Pavements written by William Edward Wolfe and published by . This book was released on 2010 with total page 118 pages. Available in PDF, EPUB and Kindle. Book excerpt: Monitoring of the environmental instrumentation installed under select pavement sections constructed by the Ohio Department of Transportation (ODOT) in 1995 on US 23 in Delaware County, Ohio was continued. The measurements made consisted of soil moisture, temperature and frost depth profiles.

Book Department of Transportation and Related Agencies Appropriations for 1994

Download or read book Department of Transportation and Related Agencies Appropriations for 1994 written by United States. Congress. House. Committee on Appropriations. Subcommittee on Department of Transportation and Related Agencies Appropriations and published by . This book was released on 1993 with total page 1188 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Long Term Pavement Performance Seasonal Asphalt Concrete AC Pavement Temperature Models

Download or read book Long Term Pavement Performance Seasonal Asphalt Concrete AC Pavement Temperature Models written by Alaeddin Mohseni and published by . This book was released on 1998 with total page 65 pages. Available in PDF, EPUB and Kindle. Book excerpt: SUPERPAVE binders are selected based on the lowest and highest pavement temperatures expected at a job. The original SUPERPAVE specifications were developed with limited data for validating the low-temperature algorithm for pavement temperatures. The lowest air temperature was assumed for the lowest pavement temperature. In areas with extremely low temperatures, this conservative approach has led to the selection of more restrictive binder grades than may be necessary. These binder grades usually require that modifiers be added to the asphalt, which increases the cost of the project. The initial round (Loop-1) of the Long Term Pavement Performance study's Seasonal Monitoring Program (LTPP-SMP) - the collection of pavement and air temperatures at 30 test sites throughout North America - was completed in 1995. The availability of these data makes it possible to evaluate and refine existing pavement temperature algorithms. Two new temperature data bases that combine the SMP data with weather station data from the original SUPERPAVE binder specifications were developed under this study. These data bases are used as tools throughout the study to further refine the existing low- and high-temperature models. This report proposes revisions to the Strategic Highway Research Program (SHRP) Performance Grading System for asphalt binder selection. Revised models for determining the low- and high-temperature component of SUPERPAVE performance-based binders are presented and compared with existing models and resulting performance grades.

Book Department of Transportation and Related Agencies Appropriations for 1995

Download or read book Department of Transportation and Related Agencies Appropriations for 1995 written by United States. Congress. House. Committee on Appropriations. Subcommittee on Department of Transportation and Related Agencies Appropriations and published by . This book was released on 1994 with total page 1166 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Transportation Research Record

Download or read book Transportation Research Record written by and published by . This book was released on 2003 with total page 644 pages. Available in PDF, EPUB and Kindle. Book excerpt: