Download or read book A Model for Calculating Pavement Temperatures from Meteorological Data written by R. G. Robinson and published by . This book was released on 1985 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Model for Calculating Pavement Temperature from Meteorological Data written by Transport and Road Research Laboratory and published by . This book was released on 1986 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Prediction of Maximum Pavement Surface Temperature Using Maximum Air Temperature and Latitude written by Debela Daba and published by GRIN Verlag. This book was released on 2019-07-16 with total page 179 pages. Available in PDF, EPUB and Kindle. Book excerpt: Master's Thesis from the year 2019 in the subject Engineering - General, Basics, grade: Excellent, , course: Raod and Transport Engineering, language: English, abstract: Marshall Mix design was developed for the hottest pavement surface temperature of the USA, which is 60-degree Celsius. This design mechanism is very dominant in our country. It was directly adopted without any modification. The research aims to develop a prediction model that will be employed to modify the Marshall Mix design method for the Ethiopian climate and incorporate maximum pavement surface temperature. In order to do so, ten years historical air temperature of Ethiopia, taken from the National Metrology Agency which was used to determine the hottest month for onsite measurement of 24 towns. For each town, actual maximum pavement surface temperature was measured from August 2016- February 2018, using Nanosensor/ radiator thermometer. The countries climate was classified into four climatic regions for the purpose of this research. For each region, a representative town is incorporated on the study. Based on site measurement and maximum air temperature with the associated latitude, Multivariate Regression Model was selected. To select the model R-squared value method, an excel analysis of scatter plots and collinearity of the explanatory variables was checked. All the inputs were provided to STATA SE-13 statistical software and model developed. After the model was developed by all the 24 towns' data, it was validated and cross-validated by dividing the data into 5 folds in order to make it applicable for all scenarios. The model was further elaborated in a laboratory case study, for the hottest town of Samara, Afar region capital. Mix design was prepared at 60°C, which is the standard specimen heating temperature and at 75°C, which is the actual maximum pavement surface temperature of Samara town. The mix that was prepared at 60° C, found to fulfill all the criteria's of Marshall Mix design outlined by Asphalt Institute for heavy Traffics. Whereas, at 75°C, it fails to do so. Therefore, mix design should be conducted at the place maximum pavement surface Temperature rather than conducting at the standard 60degree Celsius.
Download or read book Analysis of the integrated model of climatic effects on pavements written by and published by . This book was released on 1993 with total page 158 pages. Available in PDF, EPUB and Kindle. Book excerpt: One of the functions of the FHWA (Federal Highway Administration) integrated model of climatic effects on pavements is simulation of the pavement temperature. The model was applied to certain field cases for which pavement temperature measurements were available. The model seems to be capable of providing a reasonable estimate of pavement temperature if realistic input variables, particularly appropriate thermal properties, are utilized. A sensitivity analysis was performed to evaluate the influence of variations in the air temperature, solar radiation, percent sunshine, and thermal properties on the calculated pavement temperatures.
Download or read book Proceedings of the 2nd International Conference on Advances in Civil Infrastructure and Construction Materials CICM 2023 Volume 2 written by M. Shahria Alam and published by Springer Nature. This book was released on with total page 416 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Superpave Mix Design written by Asphalt Institute and published by . This book was released on 2001-01-01 with total page 102 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Proof of Concept for Prediction of Pavement Temperature written by Edward E. Adams and published by . This book was released on 1999 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt: A thermal mapping program dubbed WinTherm/RT (Windows based Thermal Model for Road Temperature) was developed in this study. The computational highway thermal map is an outgrowth of software developed for the U.S. military to determine the infrared signature of vehicles. This concept uses planar elements of finite thickness called facets to define the geometry. The model developed in this study utilizes U.S. Geological Survey (USGS) digital elevation maps (DEM) and superimposes onto them the highway location. Thermal properties associated with the highway and landscape surrounding it can be assigned. A study plot along I90 on the west side of Bozeman pass was constructed in this manner. Solar zenith angle, sky view factors, surface to surface radiation exchange and shadowing are taken into account. However, the influence of shadowing in the current algorithm uses a graphical approach that is not producing satisfactory results. This is thought to be the result of the scale necessary for the terrain modeling. In a follow on study this will be replaced with a ray tracing scheme in order to address the problem. Although data acquisition from the Remote Weather Information System (RWIS) proved problematic, sufficient information was acquired to yield very promising results.
Download or read book Analysis and Interpretation of Roadway Weather Data for Winter Highway Maintenance written by David Scott Knollhoff and published by . This book was released on 2001 with total page 148 pages. Available in PDF, EPUB and Kindle. Book excerpt: Results show that the urban pavement temperatures near both Des Moines and Cedar Rapids are generally higher than rural pavement temperatures under different sky conditions. The heat island impact on surface temperatures in Des Moines was found to be slightly larger than that of Cedar Rapids. Pavement temperature cooling patterns differed among the months analyzed, and the roadways had different cooling characteristics compared to the bridge decks. A model based on simple concepts of moisture flux to the surface was developed that uses current road weather data and forecasts of dew-point temperature, air temperature, surface temperature, and wind speed to calculate frost accumulation on bridge decks in Iowa. The analysis showed that the model has sufficient accuracy to be used as an operational tool to forecast bridge deck frost. A logistical regression procedure was developed to determine the probability that a maintenance worker will observe frost for a given calculated frost depth.
Download or read book Meteorological monitoring guidance for regulatory modeling applications written by and published by DIANE Publishing. This book was released on 2000 with total page 171 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Manual for Design of Hot Mix Asphalt with Commentary written by and published by Transportation Research Board. This book was released on 2011 with total page 285 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Introduction to Unmanned Aircraft Systems Second Edition written by Douglas M. Marshall and published by CRC Press. This book was released on 2015-10-26 with total page 1944 pages. Available in PDF, EPUB and Kindle. Book excerpt: The proliferation of technological capability, miniaturization, and demand for aerial intelligence is pushing unmanned aerial systems (UAS) into the realm of a multi-billion dollar industry. This book surveys the UAS landscape from history to future applications. It discusses commercial applications, integration into the national airspace system (NAS), System function, operational procedures, safety concerns, and a host of other relevant topics. The book is dynamic and well-illustrated with separate sections for terminology and web- based resources for further information.
Download or read book A method for calculating the temperature gradients in asphaltic concrete pavement structures based on climatic data written by and published by . This book was released on 1977 with total page 43 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 Evaluation of LTPP Climatic Data for Use in Mechanistic Empirical Pavement Design Guide MEPDG Calibration and Other Pavement Analysis written by Charles Warren Schwartz and published by . This book was released on 2015 with total page 142 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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.
Download or read book Evaluation of Long term Pavement Performance LTTP Climatic Data for Use in Mechanistic empirical Pavement Design Guide MEPDG Calibration and Other Pavement Analysis written by and published by . This book was released on 2015 with total page 126 pages. Available in PDF, EPUB and Kindle. Book excerpt: Improvements in the Long-Term Pavement Performance (LTPP) Program's climate data are needed to support current and future research into climate effects on pavement materials, design, and performance. The calibration and enhancement of the Mechanistic-Empirical Pavement Design Guide (MEPDG) is just one example of these emerging needs. A newly emerging climate data source, the Modern-Era Retrospective Analysis for Research and Applications (MERRA), developed by the National Aeronautics and Space Administration (NASA) for its own in-house modeling needs, provides continuous hourly weather data starting in 1979 on a relatively fine-grained uniform grid. MERRA is based on a reanalysis model that combines computed model fields (e.g., atmospheric temperatures) with ground-, ocean-, atmospheric-, and satellite-based observations that are distributed irregularly in space and time. MERRA data are available at an hourly temporal resolution and 0.5 degrees latitude by 0.67 degrees longitude (approximately 31.1 by 37.30 mi at mid-latitudes) spatial resolution over the entire globe. MERRA data were compared against the best available ground-based observations both statistically and in terms of effects on pavement performance as predicted using the MEPDG. These analyses included a systematic quantitative evaluation of the sensitivity of MEPDG performance predictions to variations in fundamental climate parameters. More extensive analysis of MERRA data included additional statistical analysis comparing operating weather station (OWS) and MERRA data, evaluation of the correctness of MEPDG surface shortwave radiation (SSR) calculations and comparison of MEPDG pavement performance predictions using OWS and MERRA climate data for more sections. The principal conclusion from these evaluations was that the MERRA climate data were as good and in many cases substantially better than equivalent ground-based OWS data. Given these many benefits and very few if any significant limitations, MERRA is strongly recommended as the new future source for climate data in LTPP. Recommendations are provided for incorporating hourly MERRA data into the LTPP database.
Download or read book Pavement Temperatures written by National Research Council (U.S.). Transportation Research Board and published by Transportation Research Board National Research. This book was released on 1974 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt:
