Pub Date : 2021-12-20DOI: 10.1201/9781003078814-61
F. Martínez, S. Angelone
This paper presents a field study complemented with laboratory results about a correlation between the observed cracking in an asphalt pavement and its structural properties. The obtained information is very useful to quantify the residual life of the pavement and to predict the time and type of the rehabilitation to be applied by the road agency. Based on field information and laboratory results, a pavement section was modelled. The moduli of the asphalt layer were then compared to reference values and cracking levels. The paper presents a brief description of the analyzed pavement, the field and laboratory results, the methodology used for the back-calculations, the obtained results for the modeled structure and some final conclusions. For the covering abstract see ITRD E118503.
{"title":"The Influence of Cracking on the Structural Properties of Asphalt Mixes","authors":"F. Martínez, S. Angelone","doi":"10.1201/9781003078814-61","DOIUrl":"https://doi.org/10.1201/9781003078814-61","url":null,"abstract":"This paper presents a field study complemented with laboratory results about a correlation between the observed cracking in an asphalt pavement and its structural properties. The obtained information is very useful to quantify the residual life of the pavement and to predict the time and type of the rehabilitation to be applied by the road agency. Based on field information and laboratory results, a pavement section was modelled. The moduli of the asphalt layer were then compared to reference values and cracking levels. The paper presents a brief description of the analyzed pavement, the field and laboratory results, the methodology used for the back-calculations, the obtained results for the modeled structure and some final conclusions. For the covering abstract see ITRD E118503.","PeriodicalId":11581,"journal":{"name":"Eleventh International Conference on the Bearing Capacity of Roads, Railways and Airfields, Volume 1","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79339958","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-12-20DOI: 10.1201/9781003078814-77
G. Salt, D. Stevens, R. Mcleod
When pavement structural evaluation is carried out using the Falling Weight Deflectometer, the full displacement-time history for each geophone is measured in the field, but for normal production only the peak deflection data are stored for subsequent processing. Velocity and acceleration information can however be readily captured. A preliminary study has been made to examine whether useful time-dependent parameters could be extracted from the full time history and used by practitioners. Software has been developed for capturing wave speeds and correlating with approximate moduli of the surface layer, to complement conventional back-analyses. Surface wave speeds appear promising indicators to allow rapid distinction of near surface material types and structural condition, at no additional cost or time. For the covering abstract see ITRD E118503.
{"title":"Pavement Structural Evaluation: Production Level FWD Back-Analysis Using the Full Time History","authors":"G. Salt, D. Stevens, R. Mcleod","doi":"10.1201/9781003078814-77","DOIUrl":"https://doi.org/10.1201/9781003078814-77","url":null,"abstract":"When pavement structural evaluation is carried out using the Falling Weight Deflectometer, the full displacement-time history for each geophone is measured in the field, but for normal production only the peak deflection data are stored for subsequent processing. Velocity and acceleration information can however be readily captured. A preliminary study has been made to examine whether useful time-dependent parameters could be extracted from the full time history and used by practitioners. Software has been developed for capturing wave speeds and correlating with approximate moduli of the surface layer, to complement conventional back-analyses. Surface wave speeds appear promising indicators to allow rapid distinction of near surface material types and structural condition, at no additional cost or time. For the covering abstract see ITRD E118503.","PeriodicalId":11581,"journal":{"name":"Eleventh International Conference on the Bearing Capacity of Roads, Railways and Airfields, Volume 1","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81470718","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-12-20DOI: 10.1201/9781003078814-37
P. Sebaaly, R. Siddharthan, D. Huft, D. Bush
The South Dakota Department of Transportation (SDDOT) is currently faced with the issue of allowing heavy construction and agricultural equipment to use public highways. These equipment include the following: road scrapers, grain cart, and Terragator (i.e. fertilizers). All of these equipment carry heavy loads in the order of 100-200 kN per single axle. The majority of these vehicles also use lugged tires with a highly non-uniform contact area at the tire-pavement interface. In order to assess the equivalent damage that such vehicles impose on highway pavements, the SDDOT initiated a study to measure the response of field pavement sections under the loading conditions of heavy construction and agricultural equipment. The experiment measured the responses of six pavement sections in South Dakota to the loading conditions of ten combinations of vehicles and axle loads. The measured pavement responses included strains, stresses, and deflections. The analysis of field measurements of flexible pavement responses under the scraper, grain cart, and Terragators showed that most of these vehicles are more damaging than the 80-kN single axle loads. It was recommended that SDDOT limits the use of such equipment on flexible pavements to reduce their impact on the overall performance of such pavements. For the covering abstract see ITRD E118503.
{"title":"Impact of Heavy Vehicles on Pavement Responses","authors":"P. Sebaaly, R. Siddharthan, D. Huft, D. Bush","doi":"10.1201/9781003078814-37","DOIUrl":"https://doi.org/10.1201/9781003078814-37","url":null,"abstract":"The South Dakota Department of Transportation (SDDOT) is currently faced with the issue of allowing heavy construction and agricultural equipment to use public highways. These equipment include the following: road scrapers, grain cart, and Terragator (i.e. fertilizers). All of these equipment carry heavy loads in the order of 100-200 kN per single axle. The majority of these vehicles also use lugged tires with a highly non-uniform contact area at the tire-pavement interface. In order to assess the equivalent damage that such vehicles impose on highway pavements, the SDDOT initiated a study to measure the response of field pavement sections under the loading conditions of heavy construction and agricultural equipment. The experiment measured the responses of six pavement sections in South Dakota to the loading conditions of ten combinations of vehicles and axle loads. The measured pavement responses included strains, stresses, and deflections. The analysis of field measurements of flexible pavement responses under the scraper, grain cart, and Terragators showed that most of these vehicles are more damaging than the 80-kN single axle loads. It was recommended that SDDOT limits the use of such equipment on flexible pavements to reduce their impact on the overall performance of such pavements. For the covering abstract see ITRD E118503.","PeriodicalId":11581,"journal":{"name":"Eleventh International Conference on the Bearing Capacity of Roads, Railways and Airfields, Volume 1","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89114190","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-12-20DOI: 10.1201/9781003078814-44
Fátima Alexandra Barata Antunes Batista, M. Antunes
This paper describes the main results achieved so far in a research study that is being carried out by "Laboratorio Nacional de Engenharia Civil" (LNEC), concerning the use of asphalt cold mixtures in pavement rehabilitation in Portugal, specifically dense-graded asphalt cold mixtures applied as overlays and "in situ" cold recycling of existing pavement layers. The work performed by LNEC was done in the context of the monitoring of rehabilitation works of road sections in Portugal, where these techniques were used. Studies concerning mix design methods, compaction and curing were performed. After the rehabilitation works have been finished, a performance monitoring program was started, in order to achieve results concerning the structural behaviour and the performance of the cold asphalt layers. For the covering abstract see ITRD E118503.
{"title":"Characterisation of Dense-Graded Asphalt Cold Mixtures for Pavement Rehabilitation","authors":"Fátima Alexandra Barata Antunes Batista, M. Antunes","doi":"10.1201/9781003078814-44","DOIUrl":"https://doi.org/10.1201/9781003078814-44","url":null,"abstract":"This paper describes the main results achieved so far in a research study that is being carried out by \"Laboratorio Nacional de Engenharia Civil\" (LNEC), concerning the use of asphalt cold mixtures in pavement rehabilitation in Portugal, specifically dense-graded asphalt cold mixtures applied as overlays and \"in situ\" cold recycling of existing pavement layers. The work performed by LNEC was done in the context of the monitoring of rehabilitation works of road sections in Portugal, where these techniques were used. Studies concerning mix design methods, compaction and curing were performed. After the rehabilitation works have been finished, a performance monitoring program was started, in order to achieve results concerning the structural behaviour and the performance of the cold asphalt layers. For the covering abstract see ITRD E118503.","PeriodicalId":11581,"journal":{"name":"Eleventh International Conference on the Bearing Capacity of Roads, Railways and Airfields, Volume 1","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80769198","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-12-20DOI: 10.1201/9781003078814-42
H. Wolgé, L. Naslund
The 3rd Runway at Stockholm-Arlanda Airport, the main international airport of the capital of Sweden, is currently under construction and will be opened for air traffic in 2002. A pavement design for the new runway has been carried out in a project run by the Swedish CAA. The design has been carried out for both flexible and rigid pavement alternatives. During the design work present research results and experiences have been taken into consideration. Different design methods and recently developed software have also been used. Sensibility analyses have been made and the flexible and rigid alternatives have been compared and evaluated by life-cycle cost analyses. The alternative that finally was chosen was a flexible pavement for the runway system and a rigid pavement for the de-icing aprons. At the moment the paving work that has proceeded during the last three seasons is finished and the new runway will be opened in a few months. For the covering abstract see ITRD E118503.
{"title":"Pavement Design for the 3rd Runway at Stockholm-Arlanda Airport, Sweden","authors":"H. Wolgé, L. Naslund","doi":"10.1201/9781003078814-42","DOIUrl":"https://doi.org/10.1201/9781003078814-42","url":null,"abstract":"The 3rd Runway at Stockholm-Arlanda Airport, the main international airport of the capital of Sweden, is currently under construction and will be opened for air traffic in 2002. A pavement design for the new runway has been carried out in a project run by the Swedish CAA. The design has been carried out for both flexible and rigid pavement alternatives. During the design work present research results and experiences have been taken into consideration. Different design methods and recently developed software have also been used. Sensibility analyses have been made and the flexible and rigid alternatives have been compared and evaluated by life-cycle cost analyses. The alternative that finally was chosen was a flexible pavement for the runway system and a rigid pavement for the de-icing aprons. At the moment the paving work that has proceeded during the last three seasons is finished and the new runway will be opened in a few months. For the covering abstract see ITRD E118503.","PeriodicalId":11581,"journal":{"name":"Eleventh International Conference on the Bearing Capacity of Roads, Railways and Airfields, Volume 1","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83764150","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-12-20DOI: 10.1201/9781003078814-40
Winnerholt Tomas
{"title":"A New Approach to Pavement Design in Sweden: New Swedish Road Design Manual","authors":"Winnerholt Tomas","doi":"10.1201/9781003078814-40","DOIUrl":"https://doi.org/10.1201/9781003078814-40","url":null,"abstract":"","PeriodicalId":11581,"journal":{"name":"Eleventh International Conference on the Bearing Capacity of Roads, Railways and Airfields, Volume 1","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83278754","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Proper evaluation of the plain concrete rigid pavement is important for proper corrective maintenance. Often loss of load transfer and loss of support (LOS) are hard to predict. There are several ways to evaluate them. Currently they are identified by visual evaluation and faulting measurements. Most often slab jacking, grouting, and special material treatments are applied to correct the defect. But it is hard to measure effectiveness of such treatments. Presently, nondestructive tests such as Falling Weight Deflectometer (FWD) have been used to measure deflections of pavement to evaluate loss of load transfer and support. Some of the corrected slabs resulted in lesser load transfer efficiency. Again, the FWD analysis resulted in very poor load transfer efficiency in the pavements without any visible or substantial faulting. Five different load transfer efficiency computation methods were evaluated. The FWD deflection analysis used to evaluate the maintenance treatment on the corrected slabs resulted in mixed conclusion. Methods have been used in the evaluation of rigid pavement condition survey and apply appropriate application. The load transfer in the rigid pavement without dowel bar is due to aggregate interlock and base/subbase support. A method has been devised to evaluate the load transfer efficiency (LTE) and a criterion for LOS has been selected. Statistical analysis-of-variance was used to analyze significance of the different results. The result from this method reflected the true condition of the existing pavement and is recommended for the rigid-pavement-condition evaluation. The paper discussed in detail using the Utah rigid pavement system level data.
{"title":"Evaluation of Rigid Pavement Condition Using Falling Weight Deflectometer","authors":"M. M. Pradhan","doi":"10.1201/9781003078814-7","DOIUrl":"https://doi.org/10.1201/9781003078814-7","url":null,"abstract":"Proper evaluation of the plain concrete rigid pavement is important for proper corrective maintenance. Often loss of load transfer and loss of support (LOS) are hard to predict. There are several ways to evaluate them. Currently they are identified by visual evaluation and faulting measurements. Most often slab jacking, grouting, and special material treatments are applied to correct the defect. But it is hard to measure effectiveness of such treatments. Presently, nondestructive tests such as Falling Weight Deflectometer (FWD) have been used to measure deflections of pavement to evaluate loss of load transfer and support. Some of the corrected slabs resulted in lesser load transfer efficiency. Again, the FWD analysis resulted in very poor load transfer efficiency in the pavements without any visible or substantial faulting. Five different load transfer efficiency computation methods were evaluated. The FWD deflection analysis used to evaluate the maintenance treatment on the corrected slabs resulted in mixed conclusion. Methods have been used in the evaluation of rigid pavement condition survey and apply appropriate application. The load transfer in the rigid pavement without dowel bar is due to aggregate interlock and base/subbase support. A method has been devised to evaluate the load transfer efficiency (LTE) and a criterion for LOS has been selected. Statistical analysis-of-variance was used to analyze significance of the different results. The result from this method reflected the true condition of the existing pavement and is recommended for the rigid-pavement-condition evaluation. The paper discussed in detail using the Utah rigid pavement system level data.","PeriodicalId":11581,"journal":{"name":"Eleventh International Conference on the Bearing Capacity of Roads, Railways and Airfields, Volume 1","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89664995","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-12-20DOI: 10.1201/9781003078814-18
S. Erlingsson
Two typical low volume Icelandic road structures have been tested in accelerated testing by using a Heavy Vehicle Simulator (HVS). Both were surface dressed structures, one with a 20cm thick unbound base course layer and the other with the base divided into a 10cm bitumen stabilized base over 10cm unbound base. The test road structures were instrumented to estimate deflections, strains and stresses in various locations in the pavement structure. Elastic response analysis, by using a 3-D finite element (FE) technique, was carried out to simulate the tested structure and compare it with the actual measurements. The elastic stiffness moduli were entirely derived from plate load test (PLT) results. The comparison of stresses showed relatively good correlation in the subbase and the embankment. However in the base course deviation occurred between the numerical analyses and the measurements, which increased as tyre pressure increased. This was probably due to the nonlinear behaviour of the base, which was not taken into account in the linear elastic analyses. Surface deflection measurements under the wheel load on the other hand gave lower values than the numerical analyses, which it should not if nonlinear behaviour in the base took place. For the covering abstract see ITRD E118503.
{"title":"3-D FE Analyses of Test Road Structures – Comparison with Measurements","authors":"S. Erlingsson","doi":"10.1201/9781003078814-18","DOIUrl":"https://doi.org/10.1201/9781003078814-18","url":null,"abstract":"Two typical low volume Icelandic road structures have been tested in accelerated testing by using a Heavy Vehicle Simulator (HVS). Both were surface dressed structures, one with a 20cm thick unbound base course layer and the other with the base divided into a 10cm bitumen stabilized base over 10cm unbound base. The test road structures were instrumented to estimate deflections, strains and stresses in various locations in the pavement structure. Elastic response analysis, by using a 3-D finite element (FE) technique, was carried out to simulate the tested structure and compare it with the actual measurements. The elastic stiffness moduli were entirely derived from plate load test (PLT) results. The comparison of stresses showed relatively good correlation in the subbase and the embankment. However in the base course deviation occurred between the numerical analyses and the measurements, which increased as tyre pressure increased. This was probably due to the nonlinear behaviour of the base, which was not taken into account in the linear elastic analyses. Surface deflection measurements under the wheel load on the other hand gave lower values than the numerical analyses, which it should not if nonlinear behaviour in the base took place. For the covering abstract see ITRD E118503.","PeriodicalId":11581,"journal":{"name":"Eleventh International Conference on the Bearing Capacity of Roads, Railways and Airfields, Volume 1","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84090037","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-12-20DOI: 10.1201/9781003078814-35
Eizaburou Hirotsu, N. Yoshida, M. Nishi, H. Kanki
In this research, series of repeated plate-loading tests were carried out on relatively large-scale model asphalt pavements with three different pavement sections in order to evaluate the behavior of asphalt pavement. Two different asphalt mixtures, straight and modified, and two different base-course materials and mechanically stabilized stone, were used in the tested pavement sections. Moreover, three different temperature conditions, immediately after construction, normal temperature and 60 degrees C, were imposed in the tests. This paper focuses and discusses on the temperature variation and displacement behavior of the asphalt pavements observed during repeated plate-loading tests. As the results, a large deflection near the loading plate took place for the temperature condition of immediately after construction; but as temperature went down, the deflection decreased near the loading plate and a bit increased away from it. This was due to an increase of the stiffness of the asphalt mixture and was indicative of that the load transmissibility of the asphalt mix layer rejuvenated with a decrease in temperature. There existed linear relationships between the surface displacement differential, d0-d10, and the average temperature of surface layer in semi-logarithmic coordinates. From these relationships, it was confirmed that the modified asphalt mixture was less sensitive to temperature than the straight asphalt mixture and that the asphalt-treated base layer also exhibited temperature sensitivity. For the covering abstract see ITRD E118503.
{"title":"Temperature Variation and Displacement Behavior of Model Asphalt Pavements during Repeated Plate-Loading Tests","authors":"Eizaburou Hirotsu, N. Yoshida, M. Nishi, H. Kanki","doi":"10.1201/9781003078814-35","DOIUrl":"https://doi.org/10.1201/9781003078814-35","url":null,"abstract":"In this research, series of repeated plate-loading tests were carried out on relatively large-scale model asphalt pavements with three different pavement sections in order to evaluate the behavior of asphalt pavement. Two different asphalt mixtures, straight and modified, and two different base-course materials and mechanically stabilized stone, were used in the tested pavement sections. Moreover, three different temperature conditions, immediately after construction, normal temperature and 60 degrees C, were imposed in the tests. This paper focuses and discusses on the temperature variation and displacement behavior of the asphalt pavements observed during repeated plate-loading tests. As the results, a large deflection near the loading plate took place for the temperature condition of immediately after construction; but as temperature went down, the deflection decreased near the loading plate and a bit increased away from it. This was due to an increase of the stiffness of the asphalt mixture and was indicative of that the load transmissibility of the asphalt mix layer rejuvenated with a decrease in temperature. There existed linear relationships between the surface displacement differential, d0-d10, and the average temperature of surface layer in semi-logarithmic coordinates. From these relationships, it was confirmed that the modified asphalt mixture was less sensitive to temperature than the straight asphalt mixture and that the asphalt-treated base layer also exhibited temperature sensitivity. For the covering abstract see ITRD E118503.","PeriodicalId":11581,"journal":{"name":"Eleventh International Conference on the Bearing Capacity of Roads, Railways and Airfields, Volume 1","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80918408","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-12-20DOI: 10.1201/9781003078814-52
O. Melchor-Lucero, I. Abdallah, S. Nazarian, C. Ferregut
Most mechanistic-empirical methods for determining the integrity of an existing pavement rely on the use of deflection-based nondestructive evaluation devices and a number of models to estimate the remaining life associated with a flexible pavement. We have developed a software tool that integrates artificial neural network (ANN) technology, the functional condition of pavement, uncertainty analysis and traffic information to predict a probabilistic pavement performance curve. The ANN models predict the critical strains at the layer interfaces, using readily available data such as the best estimates of each layer thickness and surface deflections from a Falling Weight Deflectometer test. As such, the backcalculation process is eliminated. Based on the validation results from an accelerated pavement testing facility and a test track, the system seems to be robust and appears to provide reasonable results. For the covering abstract see ITRD E118503.
{"title":"A Probabilistic Method for Estimating Pavement Performance Using Falling Weight Deflectometer Data","authors":"O. Melchor-Lucero, I. Abdallah, S. Nazarian, C. Ferregut","doi":"10.1201/9781003078814-52","DOIUrl":"https://doi.org/10.1201/9781003078814-52","url":null,"abstract":"Most mechanistic-empirical methods for determining the integrity of an existing pavement rely on the use of deflection-based nondestructive evaluation devices and a number of models to estimate the remaining life associated with a flexible pavement. We have developed a software tool that integrates artificial neural network (ANN) technology, the functional condition of pavement, uncertainty analysis and traffic information to predict a probabilistic pavement performance curve. The ANN models predict the critical strains at the layer interfaces, using readily available data such as the best estimates of each layer thickness and surface deflections from a Falling Weight Deflectometer test. As such, the backcalculation process is eliminated. Based on the validation results from an accelerated pavement testing facility and a test track, the system seems to be robust and appears to provide reasonable results. For the covering abstract see ITRD E118503.","PeriodicalId":11581,"journal":{"name":"Eleventh International Conference on the Bearing Capacity of Roads, Railways and Airfields, Volume 1","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82911613","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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