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Dynamic Analysis Of Flexible Pavement Systems And Comparative Study Of Seasonal And Weather Data Obtained At The Ohio Test Road And At The Moisture Temperature Monitoring Stations
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Book Synopsis Dynamic Analysis of Flexible Pavement Systems and Comparative Study of Seasonal and Weather Data Obtained at the Ohio Test Road and at the Moisture-temperature Monitoring Stations by : Vahid Louis Farzaneh
Download or read book Dynamic Analysis of Flexible Pavement Systems and Comparative Study of Seasonal and Weather Data Obtained at the Ohio Test Road and at the Moisture-temperature Monitoring Stations written by Vahid Louis Farzaneh and published by . This book was released on 2001 with total page 432 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Long Term Monitoring of Seasonal and Weather Stations and Analysis of Data from SHRP Pavements by :
Download or read book Long Term Monitoring of Seasonal and Weather Stations and Analysis of Data from SHRP Pavements written by and published by . This book was released on 2004 with total page 342 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Monitoring Seasonal Instrumentation and Modeling Climatic Effects on Pavements at the Ohio/SHRP Test Road by : Andrew G. Heydinger
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 Synopsis Monitoring and Analysis of Data Obtained from Moisture Temperature Recording Stations by : José Ludwig Figueroa
Download or read book Monitoring and Analysis of Data Obtained from Moisture Temperature Recording Stations written by José Ludwig Figueroa and published by . This book was released on 2001 with total page 172 pages. Available in PDF, EPUB and Kindle. Book excerpt: The performance of asphalt concrete pavements is in part affected by the seasonal variations of the resilient modulus of the AC layer and of the subgrade soil. To determine the variation of these parameters throughout Ohio, seven moisture-temperature-rainfall recording stations, previously installed during an Ohio Department of Transportation-funded project, and two additional ones installed during this project, were monitored for an additional period of 2-1/2 years, These stations, located to include various climatic zones and the four most common soil types within the state, recorded air, asphalt concrete and subgrade soil temperature, rainfall and moisture content (or degree of saturation) of the subgrade soil on a two-hour basis. Recorded data led to the development of polynomial equations to calculate the average asphalt concrete pavement temperature from the air temperature and to the division of the state into three temperature zones: Northern, Central and Southern. Recorded depths of frost penetration indicated average depths of 45 to 61 cm. within the southern zone and of 70 to 52 cm. within the northern zone. Similarly, the northern and the southern zones experience an average of 7 to 12 and 4 to 5 freeze-thaw cycles, respectively. The degree of saturation calculated from moisture and temperature sensor readings varied form about 90% to 100% throughout the monitoring period. The late spring to early summer consistently led to a higher degree of saturation at all depths. Finally, a method to back calculate the resilient modulus of subgrade soils (Eri) at the break point from measured FWD deflections was developed. Seasonal averages of this modulus were obtained at each of six station locations where FWD testing was conducted. Seasons were ranked in terms of expected higher resilient modulus. The designated "fall" testing period (early fall) showed the highest followed by "summer," "winter" and "spring" in decreasing order. Determined monthly and seasonal variation of material properties will find immediate application as inputs in mechanistic-empirical pavement design procedures.
Book Synopsis Extended Monitoring and Analysis of Moisture-temperature Data by : José Ludwig Figueroa
Download or read book Extended Monitoring and Analysis of Moisture-temperature Data written by José Ludwig Figueroa and published by . This book was released on 2001 with total page 192 pages. Available in PDF, EPUB and Kindle. Book excerpt: The performance of asphalt concrete pavements is in part affected by the seasonal variations of the resilient modulus of the AC layer and of the subgrade soil. To determine the variation of these parameters throughout Ohio, nine moisture-temperature-rainfall recording stations, previously installed during two Ohio Department of Transportation-funded projects, were monitored for an additional period of three years. These stations, located to include various climatic zones and the four most common soil types within the state, recorded air, asphalt concrete and subgrade soil temperature, rainfall and moisture content (or degree of saturation) of the subgrade soil on a two-hour basis. Recorded data led to the development of polynomial equations to calculate the average asphalt concrete pavement temperature from the air temperature and to the division of the state into three temperature zones: Northern, Central and Southern. Monthly and seasonal average values of the resilient modulus of the asphalt concrete for each station, the three climatic zones and for all of the state were also calculated. Recorded depths of frost penetration indicated average depths of 45 to 61 cm. within the southern zone and of 70 to 82 cm. within the northern zone. Similarly, the northern and the southern zones experience an average of 7 to 12 and 4 to 5 freeze-thaw cycles, respectively. The degree of saturation calculated from moisture and temperature sensor readings varied from about 90% to 100% throughout the monitoring period. The late spring to early summer consistently led to a higher degree of saturation at all depths. Finally, a method to back calculate the resilient modulus of subgrade soils (Eri) at the break point from measured FWD deflections was developed. Seasonal averages of this modulus were obtained at each of six station locations where FWD testing was conducted. Seasons were ranked in terms of expected higher resilient modulus. The designated "fall" testing period (early fall) showed the highest followed by "summer", "winter" and "spring" in decreasing order. Determined monthly and seasonal variation of material properties will find immediate application as inputs in mechanistic-empirical pavement design procedures.
Book Synopsis Long Term Monitoring of Moisture Under Pavements by : William Edward Wolfe
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 Synopsis Seasonal Variations in Backcalculated Pavement Layer Moduli in Minnesota by : JM. Ovik
Download or read book Seasonal Variations in Backcalculated Pavement Layer Moduli in Minnesota written by JM. Ovik and published by . This book was released on 2000 with total page 15 pages. Available in PDF, EPUB and Kindle. Book excerpt: Recent advances in flexible pavement design have prompted agencies to move toward the development and use of mechanistic-empirical (M-E) design procedures. The purpose of this paper is to analyze seasonal trends in flexible pavement layer moduli in order to calibrate a mechanistic-empirical design procedure specific to Minnesota. The relationships investigated were between climate factors, surface and subsurface conditions, and pavement material properties. The results presented focus on the base and subgrade layers and show that the layer moduli vary with the state of moisture in the pavement. The data used to develop this approach were collected from four flexible pavement Long Term Pavement Performance Seasonal Monitoring Program sites (LTPP SMP) and the Minnesota Road Research Project (Mn/ROAD). Temperature data are used in this study to characterize the severity of a winter and to approximate the onset of freezing and thawing cycles. Finally, seasonal trends in pavement layer moduli were quantified for use in an M-E design of flexible pavements.
Download or read book Highway Research Abstracts written by and published by . This book was released on 1994 with total page 348 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Effects of Climatic Loading in Flexible Pavement Subgrades in Texas by : Asif Ahmed
Download or read book Effects of Climatic Loading in Flexible Pavement Subgrades in Texas written by Asif Ahmed and published by . This book was released on 2017 with total page 206 pages. Available in PDF, EPUB and Kindle. Book excerpt: Expansive soils, which have been reported as a worldwide problem, cover 25% of the United States. Due to the swelling and shrinkage behavior induced by moisture variations, expansive soil contributes to volumetric deformation, which in turn affects the stability and performance of structures. The Texas Department of Transportation (TxDOT) allocates 25% of its budget to pavement maintenance and repairs, much of which is triggered by expansive soil. In order to decrease the burden of this expense on maintenance authorities, it is necessary to have an accurate understanding of expansive subgrade behavior. Applying this knowledge to the pavement design and construction processes can significantly increase the pavement's service life. The specific objectives of this research were to (1) study the behavior of expansive soil with seasonal changes and climatic loading; (2) asses the real-time moisture and temperature variations in the expansive subgrade; (3) quantify the deformation pattern with time in response to environmental loading; (4) develop a realtime moisture, temperature, and deformation prediction model; (5) based on the investigation of the subgrade, provide solutions in order to combat the pavement deformation; and (6) evaluate the effectiveness of the proposed solution. In order to accomplish the objectives, one farm-to-market road and one state highway were selected for observation of the behavior of expansive subgrades in North Texas. Soil samples were collected and tested to determine the soil properties. Moisture, suction sensors, temperature sensors, and rain gauges were installed to record the variations of the variables over time. Moreover, geophysical testing was conducted to continually portray the subgrade over time. Deformation of the pavement was monitored through topographic surveying and a horizontal inclinometer. Collected data was analyzed in a statistical environment to develop real-time prediction models. The first attempt produced a moisture variation model that captured variations due to seasonal effects and temporary variations due to rainfall. The outputs of this model were within 90% of the values measured on-site. The second attempt produced a temperature prediction model that was dependent on depth and the day of the year. The squared correlation coefficient between the observed and predicted soil temperature was more than 0.90. Application of the developed models could allow for a non-invasive estimation of the response of soil strength and stiffness properties due to variations in moisture and temperature. While examining the deformation data, it was found that seasonal variations only capture a portion of the deformation, whereas the amount of precipitation plays a significant role in further modifying the model. Temperature and suction were also correlated with deformation to finalize the deformation model. Application of the developed model facilitates estimation of deformation at any time of the year, in response to precipitation. The study also attempted to focus, to a limited extent, on numerical modeling; however, the selection of unsaturated parameters was challenging. The selection of unsaturated permeability and flow parameters is usually laboratory-based, because a specific condition of the soil makes it impossible to capture them in real time in the field. This study attempted to determine the variations of unsaturated hydraulic conductivity based on rainfall response data. Rather than conducting the usual laboratory testing to determine the unsaturated flow parameters by curve fitting, a novel approach was undertaken to determine the flow parameters from field soil water characteristic curves. Finally, field-based values were used in the PLAXIS 2D environment for transient analysis. The validity of the estimated parameters was confirmed, as FE results corresponded with direct field measurements. The study results indicated that FE modeling can provide effective information about the subgrade matric suction variations. This research focused on finding a possible solution to the problem of pavement distress. It was found that controlling the moisture from the edge of the pavement can significantly improve the pavement performance. Consequently, a moisture barrier consisting of a geomembrane and a geocomposite (geonet sandwiched between two nonwoven geotextiles) was suggested. A combination of a 40-mil LLDPE geomembrane and an 8-oz. HDPE geocomposite was used to control the moisture from the edge of a 50 ft. section of FM 987. A control section along the same roadway was instrumented and monitored for comparison. Preliminary field monitoring results clearly indicated that the moisture barrier significantly reduced the water infiltration near the edge of the pavement. Moreover, the movement of the pavement was reduced by 80%, based upon previous recorded measurements of the control section.
Author :American Association of State Highway and Transportation Officials Publisher :AASHTO ISBN 13 :1560510552 Total Pages :622 pages Book Rating :4.5/5 (65 download)
Book Synopsis AASHTO Guide for Design of Pavement Structures, 1993 by : American Association of State Highway and Transportation Officials
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.
Book Synopsis Pavement Analysis and Design by : Yang Hsien Huang
Download or read book Pavement Analysis and Design written by Yang Hsien Huang and published by . This book was released on 2004 with total page 775 pages. Available in PDF, EPUB and Kindle. Book excerpt: For one/two-semester, undergraduate/graduate courses in Pavement Design. This up-to-date text covers both theoretical and practical aspects of pavement analysis and design. It includes some of the latest developments in the field, and some very useful computer software-developed by the author-with detailed instructions.
Author :American Association of State Highway and Transportation Officials Publisher :AASHTO ISBN 13 :156051423X Total Pages :218 pages Book Rating :4.5/5 (65 download)
Book Synopsis Mechanistic-empirical Pavement Design Guide by : American Association of State Highway and Transportation Officials
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:
Book Synopsis Binder Characterization and Evaluation by : David A. Anderson
Download or read book Binder Characterization and Evaluation written by David A. Anderson and published by Strategic Highway Research Program (Shrp). This book was released on 1994 with total page 504 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Layer Coefficients for New and Reprocessed Asphaltic Mixes by :
Download or read book Layer Coefficients for New and Reprocessed Asphaltic Mixes written by and published by . This book was released on 2000 with total page 274 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Highway Subdrainage Design by : Lyle K. Moulton
Download or read book Highway Subdrainage Design written by Lyle K. Moulton and published by . This book was released on 1980 with total page 180 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Pavement Design and Materials by : A. T. Papagiannakis
Download or read book Pavement Design and Materials written by A. T. Papagiannakis and published by John Wiley & Sons. This book was released on 2017-02-22 with total page 555 pages. Available in PDF, EPUB and Kindle. Book excerpt: A comprehensive, state-of-the-art guide to pavement design and materials With innovations ranging from the advent of SuperpaveTM, the data generated by the Long Term Pavement Performance (LTPP) project, to the recent release of the Mechanistic-Empirical pavement design guide developed under NCHRP Study 1-37A, the field of pavement engineering is experiencing significant development. Pavement Design and Materials is a practical reference for both students and practicing engineers that explores all the aspects of pavement engineering, including materials, analysis, design, evaluation, and economic analysis. Historically, numerous techniques have been applied by a multitude of jurisdictions dealing with roadway pavements. This book focuses on the best-established, currently applicable techniques available. Pavement Design and Materials offers complete coverage of: The characterization of traffic input The characterization of pavement bases/subgrades and aggregates Asphalt binder and asphalt concrete characterization Portland cement and concrete characterization Analysis of flexible and rigid pavements Pavement evaluation Environmental effects on pavements The design of flexible and rigid pavements Pavement rehabilitation Economic analysis of alternative pavement designs The coverage is accompanied by suggestions for software for implementing various analytical techniques described in these chapters. These tools are easily accessible through the book’s companion Web site, which is constantly updated to ensure that the reader finds the most up-to-date software available.
Book Synopsis Strategic Highway Research Program by :
Download or read book Strategic Highway Research Program written by and published by . This book was released on 1986 with total page 622 pages. Available in PDF, EPUB and Kindle. Book excerpt: