Author: Sesh Commuri
Publisher:
ISBN:
Category : Compacting
Languages : en
Pages : 133

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Book Description

Author: Wei Hu
Publisher:
ISBN:
Category : Asphalt pavers
Languages : en
Pages : 149

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Book Description
While having been successfully used for soil compaction for many years, intelligent compaction (IC) technology is still relatively new for asphalt pavement construction. The potential of using intelligent compaction meter value (ICMV) for evaluating the compaction of asphalt pavements has been hindered by the fact that ICMV can be affected by many factors, which include not only roller operation parameters, but also the temperature of asphalt layer and the underlying support. Therefore, further research is necessary to improve the application of IC for the asphalt compaction. In this study, the feasibility of IC for asphalt compaction was evaluated from many aspects. Based on that, a laboratory IC technology for evaluating asphalt mixture compaction in the laboratory was also developed. In this study, one field project for soil compaction was constructed using IC technology, and a strong and stable linear relationship between ICMV and deflection could be identified when the water content of soil was consistent. After that, more field projects for asphalt compaction were constructed using the IC asphalt roller. The density of asphalt, as the most critical parameter for asphalt layers, along with other parameters, were measured and correlated with the ICMVs. Various factors such as asphalt temperature and the underlying support were considered in this study to improve the correlation between the density and ICMV. Based upon the results of correlation analyses, three IC parameters were recommended for evaluating the compaction quality of resurfacing project. In addition, the geostatistical analyses were performed to evaluate the spatial uniformity of compaction, and the cost-benefit analysis was included to demonstrate the economic benefits of IC technology. Based on the test results of field projects, the IC indices were further utilized to quantify the lab vibratory compaction for paving materials. The compaction processes in the laboratory was monitored by accelerometers. Using Discrete-Time Fourier Transform, the recorded data during compaction were analyzed to evaluate the compactability of paving materials and to further correlate to the field compaction.

Author:
Publisher:
ISBN:
Category : Pavements
Languages : en
Pages : 178

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Book Description

Author: Xueyan Liu
Publisher: CRC Press
ISBN: 1000533344
Category : Technology & Engineering
Languages : en
Pages : 825

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Book Description
Green and Intelligent Technologies for Sustainable and Smart Asphalt Pavements contains 124 papers from 14 different countries which were presented at the 5th International Symposium on Frontiers of Road and Airport Engineering (IFRAE 2021, Delft, the Netherlands, 12-14 July 2021). The contributions focus on research in the areas of "Circular, Sustainable and Smart Airport and Highway Pavement" and collects the state-of-the-art and state-of-practice areas of long-life and circular materials for sustainable, cost-effective smart airport and highway pavement design and construction. The main areas covered by the book include: • Green and sustainable pavement materials • Recycling technology • Warm & cold mix asphalt materials • Functional pavement design • Self-healing pavement materials • Eco-efficiency pavement materials • Pavement preservation, maintenance and rehabilitation • Smart pavement materials and structures • Safety technology for smart roads • Pavement monitoring and big data analysis • Role of transportation engineering in future pavements Green and Intelligent Technologies for Sustainable and Smart Asphalt Pavements aims at researchers, practitioners, and administrators interested in new materials and innovative technologies for achieving sustainable and renewable pavement materials and design methods, and for those involved or working in the broader field of pavement engineering.

Author: United States. Federal Highway Administration
Publisher:
ISBN:
Category : Asphalt
Languages : en
Pages : 6

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Book Description
This Technical Brief provides information that targets what an Executive level person in a state DOT would need to know to understand the advantages and reasons for using Intelligent Compaction equipment to construct highway aggregate bases and for construction of asphalt pavements. Use of this technology can improve pavement performance and extend the life of the pavement.

Author: Shuai Yu
Publisher:
ISBN:
Category :
Languages : en
Pages : 0

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Book Description
Effective compaction is crucial for the performance and durability of asphalt pavement. Traditional field compaction, relying heavily on engineers' experience and test strips, sometimes could be problematic to achieve a unified pavement with a desirable density, especially with new materials. To address these challenges, Intelligent Compaction (IC) has been developed to equip the vibratory rollers with GPS, accelerometers, onboard computers, and infrared thermometers to facilitate the quality control of pavement compaction. This technology allows for real-time monitoring and visualization of pavement responses and temperatures, significantly improving compaction uniformity. However, accurately predicting pavement density remains challenging due to the multilayered pavement structure and the complex interactions between the roller drum and the viscoelastic asphalt mixture. To understand the compaction mechanism and improve the compaction quality of the asphalt pavement, a Microelectromechanical System (MEMS) sensor, SmartKli was employed to study the asphalt mixture compaction at the mesoscale. It was found that the compaction characteristics at the macroscale are closely related to the behavior of coarse aggregates at the mesoscale level. The particle rotation plays a critical role in the densification of the asphalt specimens. Utilizing the Discrete Element Model (DEM), the impact of mix design and particle property on kinematic behaviors was examined. The mixture gradation and particle size also greatly affect the aggregates' behavior during compaction. Based on the developed compaction mechanism, a new method for evaluating asphalt mixture workability was proposed, incorporating workability parameters, compaction curves, and statistical analysis of compaction data. By verifying with different asphalt types including Hot Mix Asphalt (HMA), Warm Mix Asphalt (WMA), and Recycled Plastic Modified Asphalt (RPMA), this method could effectively assess the influence of various factors like asphalt content, compaction temperature, and additives on mixture workability, aiding in optimizing mix design and construction conditions. Moreover, an innovative compaction monitoring system was developed to accurately predict the compaction conditions of the asphalt pavement. This system uses a wireless particle size sensor for data acquisition and a machine learning model for density prediction. Linking laboratory gyratory and field roller compaction data through particle kinematic behaviors, the system achieved high precision in density prediction with a prediction error of less than 0.7%. The results demonstrate that integrating AI and sensing data is effective for predicting asphalt mixture compaction. This system could significantly enhance the compaction quality of asphalt pavement and contribute to the comprehensive quality control and assurance of pavement construction.

Author: John Harvey
Publisher: CRC Press
ISBN: 1000201724
Category : Technology & Engineering
Languages : en
Pages : 557

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Book Description
An increasing number of agencies, academic institutes, and governmental and industrial bodies are embracing the principles of sustainability in managing their activities. Life Cycle Assessment (LCA) is an approach developed to provide decision support regarding the environmental impact of industrial processes and products. LCA is a field with ongoing research, development and improvement and is being implemented world-wide, particularly in the areas of pavement, roadways and bridges. Pavement, Roadway, and Bridge Life Cycle Assessment 2020 contains the contributions to the International Symposium on Pavement, Roadway, and Bridge Life Cycle Assessment 2020 (Davis, CA, USA, June 3-6, 2020) covering research and practical issues related to pavement, roadway and bridge LCA, including data and tools, asset management, environmental product declarations, procurement, planning, vehicle interaction, and impact of materials, structure, and construction. Pavement, Roadway, and Bridge Life Cycle Assessment 2020 will be of interest to researchers, professionals, and policymakers in academia, industry, and government who are interested in the sustainability of pavements, roadways and bridges.

Author: George K. Chang
Publisher:
ISBN:
Category : Asphalt
Languages : en
Pages : 321

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Book Description
Intelligent Compaction (IC) technology is an innovation of roller technology that can be used to improve quality control (QC) of the asphalt pavement compaction process. It is increasingly used by the asphalt paving industry in the US. Currently, IC is being adopted by many federal and state highway agencies. Asphalt IC technology uses accelerometer - based methods to collect IC measurement values (ICMV) that relate to the stiffness of the compacted materials. Across the US, in - place asphalt density measurement is still the de facto method for acceptance as the in - place densities relate to long - term performance of asphalt pavements. Past limited research has not been successful in finding a strong correlation between ICMV and measured in - place density. To accelerate the implementation of IC technology, it is essential to further study the relationship between IC measured data and core density to assess the use of IC measurements beyond QC. This project includes extensive field studies and data analysis and modeling in order to investigate the relationship between ICMV and other IC measurements (such as pass counts, temperatures, vibration frequencies/amplitudes, direction, speed, etc.) and asphalt in - place densities. The pass - by - pass ICMV correlate well with nu clear density gauge measurements during breakdown compaction. As the final ICMV does not correlate well with core densities, the final ICMV data is not recommended to replace cores for acceptance. A n IC - based nonlinear panel data model was also developed to reasonably predict asphalt in - place density as an enhanced QC tool . Recommendation are also provided regarding future research and implementation to maximize the potential benefits of IC.

Author: Michael A. Mooney
Publisher: Transportation Research Board
ISBN: 0309155193
Category : Science
Languages : en
Pages : 178

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Book Description
TRB's National Cooperative Highway Research Program (NCHRP) Report 676: Intelligent Soil Compaction Systems explores intelligent compaction, a new method of achieving and documenting compaction requirements. Intelligent compaction uses continuous compaction-roller vibration monitoring to assess mechanistic soil properties, continuous modification/adaptation of roller vibration amplitude and frequency to ensure optimum compaction, and full-time monitoring by an integrated global positioning system to provide a complete GPS-based record of the compacted area--

Author: Siddharth M. Satani
Publisher:
ISBN: 9781392587676
Category : Civil engineering
Languages : en
Pages : 0

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Book Description
Compaction reduces the volume of soil layers, aggregates, asphalt, and air voids. In the conventional compaction method, quality control is an issue since tests are limited to very specific locations, the actual amount of compaction needed is unknown for the operator at the real-time, and properties measured by devices are limited to outbound layers only. While Intelligent Compaction (IC) is a smart technology that provides 100% surface coverage over pavement compaction. Therefore, the quality control and consequently the uniformity of the layer will be significantly improved. IC technology applies to both soil base and asphalt concrete construction. It is also expanding the life span of the roadway. IC is performed by IC rollers equipped with the following: accelerometer, accurate Global Positioning System, Infrared Temperature Sensors, and onboard screens that continuously analyze compaction data. This system collects vibration amplitude and frequency data, roller speed, eccentric force, number of passes and real-time asphalt surface temperature. An accelerometer provides Intelligent Compaction Measurement Value (ICMV). ICMV is a measurement of material stiffness. The utilization of IC technology improves the accuracy of quality control. However, contractors and project owners are yet concerned about the cost efficiency of the approach. This study covers Life Cycle Cost Analysis (LCCA) and Life Cycle Assessment (LCA) of IC and Conventional Compaction. Several analyses are performed over a construction project, it is concluded that IC technology, can optimize agency, user and maintenance cost, construction time, reduce air emissions, and reduce resource usage.