Author: Munir D. Nazzal
Publisher:
ISBN:
Category : Binders (Materials)
Languages : en
Pages :
Book Description
This report summarizes the research work that was completed to assess the optimum percentages of recycled asphalt pavement (RAP) that can be used in surface course mixtures of local roadways while ensuring durability is maintained. This project was divided into two phases. Phase 1 included conducting a comprehensive laboratory testing on mixtures with different RAP contents and recycling agents. Based on the results of Phase 1, Phase 2 of this project involved constructing eight test sections as a part of a resurfacing project on Hall Road in the City of Columbus. Surface course asphalt mixtures with a similar aggregate blend but different percentages of RAP were used in these test sections. The first section (control section) had a mix with 20% RAP and PG 64-22 binder. While three test sections had mixes with 30%, 40%, 50% RAP, PG 64-22 binder, and Sylvaroad recycling agent, three other sections had mixes with the same RAP percentages and binder but used Hydrolene as the recycling agent. Finally, the last section was constructed using a mixture containing 30% RAP and PG 64-28 binder with no recycling agent. Cores were obtained at different locations within each test section. In addition, specimens were compacted in a laboratory from loose mixtures that were obtained during the construction of each test section. Tests were done on field cores and laboratory-compacted specimens. The test results showed that Hydrolene was more effective than Sylvaroad in improving the fatigue cracking resistance of RAP mixes with more than 0.3 binder. In addition, the tests results showed that the 30% RAP, 40% RAP, and 50% RAP mixes had similar low-temperature cracking resistance to that of the control. The laboratory test results also showed that all mixes had acceptable rutting resistance. The results of the cost analyses conducted in Phase 2 indicated that using a higher RAP content of 40% and recycling agents can reduce the initial cost of an asphalt mixture by at least 15%.
Optimizing the Effective Use of RAP in Local Roadways
Author: Munir D. Nazzal
Publisher:
ISBN:
Category : Binders (Materials)
Languages : en
Pages :
Book Description
This report summarizes the research work that was completed to assess the optimum percentages of recycled asphalt pavement (RAP) that can be used in surface course mixtures of local roadways while ensuring durability is maintained. This project was divided into two phases. Phase 1 included conducting a comprehensive laboratory testing on mixtures with different RAP contents and recycling agents. Based on the results of Phase 1, Phase 2 of this project involved constructing eight test sections as a part of a resurfacing project on Hall Road in the City of Columbus. Surface course asphalt mixtures with a similar aggregate blend but different percentages of RAP were used in these test sections. The first section (control section) had a mix with 20% RAP and PG 64-22 binder. While three test sections had mixes with 30%, 40%, 50% RAP, PG 64-22 binder, and Sylvaroad recycling agent, three other sections had mixes with the same RAP percentages and binder but used Hydrolene as the recycling agent. Finally, the last section was constructed using a mixture containing 30% RAP and PG 64-28 binder with no recycling agent. Cores were obtained at different locations within each test section. In addition, specimens were compacted in a laboratory from loose mixtures that were obtained during the construction of each test section. Tests were done on field cores and laboratory-compacted specimens. The test results showed that Hydrolene was more effective than Sylvaroad in improving the fatigue cracking resistance of RAP mixes with more than 0.3 binder. In addition, the tests results showed that the 30% RAP, 40% RAP, and 50% RAP mixes had similar low-temperature cracking resistance to that of the control. The laboratory test results also showed that all mixes had acceptable rutting resistance. The results of the cost analyses conducted in Phase 2 indicated that using a higher RAP content of 40% and recycling agents can reduce the initial cost of an asphalt mixture by at least 15%.
Publisher:
ISBN:
Category : Binders (Materials)
Languages : en
Pages :
Book Description
This report summarizes the research work that was completed to assess the optimum percentages of recycled asphalt pavement (RAP) that can be used in surface course mixtures of local roadways while ensuring durability is maintained. This project was divided into two phases. Phase 1 included conducting a comprehensive laboratory testing on mixtures with different RAP contents and recycling agents. Based on the results of Phase 1, Phase 2 of this project involved constructing eight test sections as a part of a resurfacing project on Hall Road in the City of Columbus. Surface course asphalt mixtures with a similar aggregate blend but different percentages of RAP were used in these test sections. The first section (control section) had a mix with 20% RAP and PG 64-22 binder. While three test sections had mixes with 30%, 40%, 50% RAP, PG 64-22 binder, and Sylvaroad recycling agent, three other sections had mixes with the same RAP percentages and binder but used Hydrolene as the recycling agent. Finally, the last section was constructed using a mixture containing 30% RAP and PG 64-28 binder with no recycling agent. Cores were obtained at different locations within each test section. In addition, specimens were compacted in a laboratory from loose mixtures that were obtained during the construction of each test section. Tests were done on field cores and laboratory-compacted specimens. The test results showed that Hydrolene was more effective than Sylvaroad in improving the fatigue cracking resistance of RAP mixes with more than 0.3 binder. In addition, the tests results showed that the 30% RAP, 40% RAP, and 50% RAP mixes had similar low-temperature cracking resistance to that of the control. The laboratory test results also showed that all mixes had acceptable rutting resistance. The results of the cost analyses conducted in Phase 2 indicated that using a higher RAP content of 40% and recycling agents can reduce the initial cost of an asphalt mixture by at least 15%.
Optimizing the Effective Use of RAP in Local Roadways by Using Recycling Agents
Author: Amro Abushama
Publisher:
ISBN:
Category : Pavements, Asphalt
Languages : en
Pages :
Book Description
Publisher:
ISBN:
Category : Pavements, Asphalt
Languages : en
Pages :
Book Description
Superpave Mix Design
Author: Asphalt Institute
Publisher:
ISBN: 9781934154175
Category : Asphalt
Languages : en
Pages : 102
Book Description
Publisher:
ISBN: 9781934154175
Category : Asphalt
Languages : en
Pages : 102
Book Description
Performance of Recycled Asphalt Pavement in Gravel Roads
Author: Scott Koch
Publisher:
ISBN: 9781124451275
Category : Dust control
Languages : en
Pages : 321
Book Description
As more Recycled Asphalt Pavement (RAP) becomes available to use in roadways, The Wyoming T2/LTAP Center and two Wyoming counties investigated the use of RAP in gravel roads. The Wyoming DOT along with the Mountain Plains Consortium funded this study. The investigation explored the use RAP as a means of dust suppression on gravel roads while considering road serviceability. Several test sections were constructed in two Wyoming counties and were monitored for dust loss using the Colorado State University Dustometer. Surface distress evaluations of the test sections were performed following a technique developed by the U.S. Army Corps of Engineers in Special Report 92-26: Unsurfaced Road Maintenance Management. The data collected was summarized and statistically analyzed. The performance of RAP sections was compared to the performance of gravel control sections. This comparison allowed for fundamental conclusions and recommendations to be made for RAP and its ability for dust abatement. It was found that RAP incorporated gravel roads can reduce dust loss without adversely affecting the road's serviceability. Other counties and agencies can expand on this research to add another tool to their toolbox for dust control on gravel roads.
Publisher:
ISBN: 9781124451275
Category : Dust control
Languages : en
Pages : 321
Book Description
As more Recycled Asphalt Pavement (RAP) becomes available to use in roadways, The Wyoming T2/LTAP Center and two Wyoming counties investigated the use of RAP in gravel roads. The Wyoming DOT along with the Mountain Plains Consortium funded this study. The investigation explored the use RAP as a means of dust suppression on gravel roads while considering road serviceability. Several test sections were constructed in two Wyoming counties and were monitored for dust loss using the Colorado State University Dustometer. Surface distress evaluations of the test sections were performed following a technique developed by the U.S. Army Corps of Engineers in Special Report 92-26: Unsurfaced Road Maintenance Management. The data collected was summarized and statistically analyzed. The performance of RAP sections was compared to the performance of gravel control sections. This comparison allowed for fundamental conclusions and recommendations to be made for RAP and its ability for dust abatement. It was found that RAP incorporated gravel roads can reduce dust loss without adversely affecting the road's serviceability. Other counties and agencies can expand on this research to add another tool to their toolbox for dust control on gravel roads.
Recycling Materials for Highways
Author: National Research Council (U.S.). Transportation Research Board
Publisher: Transportation Research Board National Research
ISBN:
Category : Nature
Languages : en
Pages : 64
Book Description
"This synthesis will be of special interest and usefulness to design engineers, materials technologists, and others seeking information on the potential use of recycled materials in design, construction, rehabilitation, and maintenance of pavements, bases, and other components of the highway system. Detailed information is presented on procedures for pavement recycling."--Avant-propos.
Publisher: Transportation Research Board National Research
ISBN:
Category : Nature
Languages : en
Pages : 64
Book Description
"This synthesis will be of special interest and usefulness to design engineers, materials technologists, and others seeking information on the potential use of recycled materials in design, construction, rehabilitation, and maintenance of pavements, bases, and other components of the highway system. Detailed information is presented on procedures for pavement recycling."--Avant-propos.
Dissertation Abstracts International
Author:
Publisher:
ISBN:
Category : Dissertations, Academic
Languages : en
Pages : 960
Book Description
Publisher:
ISBN:
Category : Dissertations, Academic
Languages : en
Pages : 960
Book Description
Ant Colony Optimization
Author: Marco Dorigo
Publisher: MIT Press
ISBN: 9780262042192
Category : Computers
Languages : en
Pages : 324
Book Description
An overview of the rapidly growing field of ant colony optimization that describes theoretical findings, the major algorithms, and current applications. The complex social behaviors of ants have been much studied by science, and computer scientists are now finding that these behavior patterns can provide models for solving difficult combinatorial optimization problems. The attempt to develop algorithms inspired by one aspect of ant behavior, the ability to find what computer scientists would call shortest paths, has become the field of ant colony optimization (ACO), the most successful and widely recognized algorithmic technique based on ant behavior. This book presents an overview of this rapidly growing field, from its theoretical inception to practical applications, including descriptions of many available ACO algorithms and their uses. The book first describes the translation of observed ant behavior into working optimization algorithms. The ant colony metaheuristic is then introduced and viewed in the general context of combinatorial optimization. This is followed by a detailed description and guide to all major ACO algorithms and a report on current theoretical findings. The book surveys ACO applications now in use, including routing, assignment, scheduling, subset, machine learning, and bioinformatics problems. AntNet, an ACO algorithm designed for the network routing problem, is described in detail. The authors conclude by summarizing the progress in the field and outlining future research directions. Each chapter ends with bibliographic material, bullet points setting out important ideas covered in the chapter, and exercises. Ant Colony Optimization will be of interest to academic and industry researchers, graduate students, and practitioners who wish to learn how to implement ACO algorithms.
Publisher: MIT Press
ISBN: 9780262042192
Category : Computers
Languages : en
Pages : 324
Book Description
An overview of the rapidly growing field of ant colony optimization that describes theoretical findings, the major algorithms, and current applications. The complex social behaviors of ants have been much studied by science, and computer scientists are now finding that these behavior patterns can provide models for solving difficult combinatorial optimization problems. The attempt to develop algorithms inspired by one aspect of ant behavior, the ability to find what computer scientists would call shortest paths, has become the field of ant colony optimization (ACO), the most successful and widely recognized algorithmic technique based on ant behavior. This book presents an overview of this rapidly growing field, from its theoretical inception to practical applications, including descriptions of many available ACO algorithms and their uses. The book first describes the translation of observed ant behavior into working optimization algorithms. The ant colony metaheuristic is then introduced and viewed in the general context of combinatorial optimization. This is followed by a detailed description and guide to all major ACO algorithms and a report on current theoretical findings. The book surveys ACO applications now in use, including routing, assignment, scheduling, subset, machine learning, and bioinformatics problems. AntNet, an ACO algorithm designed for the network routing problem, is described in detail. The authors conclude by summarizing the progress in the field and outlining future research directions. Each chapter ends with bibliographic material, bullet points setting out important ideas covered in the chapter, and exercises. Ant Colony Optimization will be of interest to academic and industry researchers, graduate students, and practitioners who wish to learn how to implement ACO algorithms.
Hot-mix Asphalt Mixtures
Principles of Pavement Engineering
Author: Nick Thom
Publisher: Emerald Group Publishing
ISBN: 1835497101
Category : Technology & Engineering
Languages : en
Pages : 448
Book Description
Principles of Pavement Engineering, Third edition is an essential reference on fundamental principles of pavement engineering, showing how to design, construct, evaluate and maintain pavements of all types.
Publisher: Emerald Group Publishing
ISBN: 1835497101
Category : Technology & Engineering
Languages : en
Pages : 448
Book Description
Principles of Pavement Engineering, Third edition is an essential reference on fundamental principles of pavement engineering, showing how to design, construct, evaluate and maintain pavements of all types.