DOCSLIB.ORG

Sustainable Asphalt Pavements: a Practical Guide

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text

Load more

Sustainability in Practice 100 Sustainable Asphalt Pavements A Practical Guide This publication is provided by the Members of the National Asphalt Pavement Association (NAPA), who are the nation’s leading asphalt producer/contractor firms and those furnishing equipment and services for the construction of quality asphalt pavements. NAPA Members are dedicated to providing the highest quality asphalt paving materials and pavements, and to increasing the knowledge of quality asphalt pavement design, construction, maintenance, and rehabilitation. NAPA also strongly supports the development and dissemination of research, engineering and educational information that meets America’s needs in transportation, recreational, and environ- mental pavements. 6406 Ivy Lane, Suite 350 Geenbelt, MD 20770-1441 Tel: 301-731-4748 Fax: 301-731-4621 Toll free 1-888-468-6499 www.AsphaltPavement.org [email protected] Audrey Copeland, Ph.D., P.E. President & CEO J. Richard Willis, Ph.D. Senior Director for Pavement Engineering & Innovation Joseph Shacat Director of Sustainable Pavements This publication is designed to provide information of interest to NAPA Members and is not to be considered a publication of standards or regulations. The views of the authors expressed herein do not necessarily reflect the decision making process of NAPA with regard to advice or opinions on the merits of certain processes, procedures, or equipment. COPYRIGHT NOTICE Publications produced and published by the National Asphalt Pavement Association (NAPA) are copyrighted by the Association and may not be republished or copied (including mechanical reproductions) without written consent. To obtain this consent contact the Association at the address above. © 2019 National Asphalt Pavement Association Sustainability in Practice Series 100 Printed 11/19 Sustainability in Practice 100 Sustainable Asphalt Pavements: A Practical Guide By Stephen T. Muench, Ph.D., P.E. University of Washington Adam J.T. Hand, Ph.D., P.E. University of Nevada, Reno NATIONAL ASPHALT PAVEMENT ASSOCIATION 6406 Ivy Lane, Suite 350 Greenbelt, MD 20770-1441 Tel: 301-731-4748 Fax: 301-731-4621 Toll free 1-888-468-6499 www.AsphaltPavement.org [email protected] IS 141 • NATIONAL ASPHALT PAVEMENT ASSOCIATION Thinlays for Pavement Preservation 1 Technical Report Documentation Page 1. Report No. 2. Report Date Sustainability in Practice 100 November 2019 3. Title and Subtitle Sustainable Asphalt Pavements: A Practical Guide (SIP 100) 4. Author(s) Stephen T. Muench, Ph.D., P.E., & Adam J.T. Hand, Ph.D., P.E. 5. Performing Organization Name and Address 6. Type of Report and Period Covered National Asphalt Pavement Association Final 6406 Ivy Lane, Suite 350 7. Contract or Grant No. Greenbelt, MD 20770-1441 8. Supplementary Notes This project was funded under FHWA Cooperative Agreement DTFH61-13-H-00027 “Deployment of Innovative Asphalt Technologies.” 9. Abstract This is a compilation of the four publications in the Sustainable Asphalt Pavements: A Practical Guide series published by the National Asphalt Pavement Association. The series focuses on what an asphalt producer or asphalt project can do now to address sustainability within the confines of good business practice. The four publications in this series are meant to work together and are organized as follows: 1. SIP 101: Sustainability Overview. A practical definition of sustainability and the elements of and reasons for a business approach to sustainability. 2. SIP 102: Sustainability Specifics. Specific sustainability actions that can be taken in corporate/organizational strategy, project delivery, mix design, materials production, construction activities, and pavement design. 3. SIP 103: Procuring and Evaluating Sustainability. How sustainability is included in public project procurement, and how sustainability efforts are evaluated within the industry. 4. SIP 104: How to Develop a Sustainability Program. Important components of a company sustainability program including goals, best practices, implementation, and reporting. Accompanying webinars for each publication in the series can be found at www.AsphaltPavement.org/PracticalGuide. 10. Key Words 11. Distribution Statement Asphalt Pavement, Sustainability, Plant Operations, Paving Operations, Community No restrictions. Engagement, Sustainability Planning, Reporting, Business Practices 12. Suggested Citation 23. Price Muench, S.T., & A.J.T. Hand (2019). Sustainable Asphalt Pavements: A Practical Guide (SIP 100). National Asphalt N/A Pavement Association, Greenbelt, Maryland. 24. No. of Pages 150 CONTENTS Introduction .......................................................................................................................................0-5 SIP 101: Sustainability Overview .................................................................................................1-3 Practical Sustainability ..................................................................................................................1-3 The Technical Details of Sustainability ..........................................................................................1-4 Addressing Sustainability as a Business .......................................................................................1-6 Insights on the Business Case for Sustainability...........................................................................1-8 Summary .......................................................................................................................................1-9 SIP 102: Sustainability Specifics .................................................................................................2-3 Corporate/Organizational ..............................................................................................................2-4 Project Delivery ............................................................................................................................2-12 Materials Production ...................................................................................................................2-21 Construction ................................................................................................................................2-36 Pavement Design ........................................................................................................................2-53 SIP 103: Procuring and Evaluating Sustainability ...................................................................3-3 Procuring Sustainability in Public Contracts .................................................................................3-3 Evaluating Sustainability Using a Rating System ..........................................................................3-6 Summary .......................................................................................................................................3-9 SIP 104: How to Develop a Sustainability Program ................................................................4-3 Corporate Sustainability Program Planning ..................................................................................4-3 Corporate Sustainability Reporting ...............................................................................................4-9 Examples of Industry Sustainability Programs ............................................................................4-14 Implementation Best Practices ...................................................................................................4-23 Resources ....................................................................................................................................4-28 Appendix A: Examples of Sustainability Reporting Metrics ........................................................4-31 Appendix B: Summary of GRI Sustainability Reporting ..............................................................4-43 On the Cover Upper Left: Michigan Department of Transportation and Rieth-Riley Construction Co. Inc. earned a 2015 Quality in Construction Award, Over 50,000 Tons, for the construction of M-231 near Nunica, Michigan. The project used a 24-foot-wide wedge-lock screed and material transfer device to place the base and leveling courses in a single 24-foot-wide pass, eliminating a cold joint at the center line for a smooth, uniform mat. Upper Right: Ajax Paving Industries of Florida earned an Operational Excellence Award — Ecological Operations, Existing Plant, in 2015 for its Plant No. 1 in North Venice, Florida. Lower Right: Granite Construction Alaska Branch earned a Quality in Construction Award in Green Airport Paving for its work in 2015 at Ted Stevens Anchorage International Airport. The project included 25 percent reclaimed asphalt pavement in one of the runway pavement mixtures. Lower Left: Pennsy Supply in Pennsylvania won a 2014 Operational Excellence Award — Community Involvement for the company’s food bank collection program in which operational units competed against each other to collect the most food by weight. SIP 100 Sustainable Asphalt Pavements: A Practical Guide | 0-3 0-4 | SIP 100 Sustainable Asphalt Pavements: A Practical Guide Introduction Sustainable Asphalt Pavements: A Practical Guide The asphalt pavement industry has a long history of outstanding environmental performance. With more than 93% of pavements in the U.S. surfaced with asphalt (FHWA, 2018), it is clear that pavement owners know that asphalt is unparalleled as a cost-effective pavement material
Recommended publications
  • RECYCLED PRODUCTS the Improved Function and Long-Lasting

    RECYCLED PRODUCTS the Improved Function and Long-Lasting

    RECYCLED PRODUCTS The improved function and long-lasting characteristics of recycled rubber bring quality to customers’ product lines while serving the important function of reaching conservation goals. Much of the recycled rubber produced by Liberty Tire Recycling is used as crumb rubber and industrial feedstock for manufacturers, as tire derived fuel for use in industry, or as rubber mulch in landscaping and playground applications. Crumb Rubber Liberty Tire Recycling has the capacity to produce more than 300 million pounds of crumb rubber annually for a wide variety of innovative uses. With a network of crumb rubber manufacturing locations, Liberty Tire produces a wide variety of mesh sizes with 30- as the finest. For certain applications—such as those required to make automotive parts and coatings—Liberty Tire provides crumb rubber as “feedstock” to companies that produce finely ground rubber powders. Product Innovations As manufacturers discover the value of recycled rubber and embrace the environmental impact of recycling, scrap tires continue to be shredded and ground into various sizes of powders, crumbs and nuggets for use in more and more products. • Welcome mats • Acoustical underlay • Railroad ties • Portable speed bumps • Anti-fatigue mats Beyond molded rubber products and coatings, recycled rubber is used to enhance road surfaces, power factories, beautify landscapes, protect children at play, and improve athletic surfaces. CONTACT INFORMATION MEDIA INQUIRIES Liberty Tire Recycling Ronnie Savion 600 River Rd, Suite 300 412.642.7700 Pittsburgh, PA 15212 [email protected] 412.562.1700 [email protected] RUBBERIZED ASPHALT Rubberized asphalt highways ride quieter, last longer, and use significantly less paving material than traditional asphalt.
  • That Old Black Magic: Fluid-Applied, Polymer-Modified Rubberized

    That Old Black Magic: Fluid-Applied, Polymer-Modified Rubberized

    Part I of “That Old Black Magic” was published in the February 2000 edition of Interface. HISTORY opment and material engineering refine- rial. At that time, the chemical engineers Commonly referred to as “hot rubber- ments were made in Europe by, among oth- imagined an unlimited number of applica- ized asphalt,” fluid-applied, polymer-mod- ers, Shell’s French subsidiary, Shell France tions in highway construction—the 800- ified asphalt bitumen is also known by a Bitumen Corp., starting around 1972. pound gorilla of asphalt consumption that number of monikers, including fluid-ap- As product development continued in it still is today. Subsequently, their vision plied, hot-melt waterproofing; fluid-applied, the 1950s, chemical engineers learned how grew to include roofing, and their primary monolithic membrane; rubberized asphalt to use high-shear mixers in such a man- focus became preformed SBS sheet roofing. membrane; and different combinations of ner that the absorption and expansion of SBS modified-bitumen sheet roofing was these descriptive words, as well as various the rubber component molecules could be introduced into both the American and acronyms. engineered and controlled, resulting in an Canadian markets around 1977. Fluid- The two primary components of early end product that was a stable, rubber-like, applied waterproofing incorporating SBS polymer-modified rubberized asphalt— elastomeric-thermoplastic asphaltic mate- was not given much thought at that time. unoxidized asphalt flux and styrene butadi- ene rubber (SBR, a synthetic rubber)—were considered to be incompatible with each other prior to innovative molecular engi- neering by a number of early pioneers. When asphalt flux and synthetic rubber are put in intimate contact, the light ends of the asphalt flux molecularly migrate into the rubber, causing it to swell and disfigure to a large, variable multitude of its original size, a classic incompatible response, as the minor constituent—rubber—becomes the major constituent of the mix.
  • Malaysian Rubber Board

    Malaysian Rubber Board

    MRC INDUSTRY LINKAGE FUND Industry-University Interaction Session 2021 MALAYSIAN RUBBER BOARD 29 Jun 2021 Copyright © Malaysian Rubber Board MALAYSIAN RUBBER BOARD : OVERVIEW TECHNOLOGY & ENGINEERING DIVISION (BAHAGIAN TEKNOLOGI & KEJURUTERAAN, BTK) Economy, licensing & DOWNSTREAM R&D, CONSULTANCIES AND SPECIAL SERVICES enforcement Services & Support Dr Azhar Ahmad, PhD Ketua, Unit Pemprosesan & Dr Fatimah Rubaizah MR, PhD Kelestarian Ketua, Unit Pembangunan & ([email protected]) Inovasi Bahan Termaju ([email protected]) Upstream Dr Nazirah Ahmad, PhD Dasar & Ketua, Unit Kejuruteraan Operasi Rekabentuk & KETUA Downstream Pembangunaan Produk PENGARAH Penyelidikan Dr Mok Kok Lang, PhD ([email protected]) Relevant to MILF Divisional Director, & Inovasi Quality & Bahagian Teknologi & Standards Kejuruteraan ([email protected]) Expansion • Corporate • Legal • Strategic Planning Dr Yong Kok Chong, PhD Dr Asrul Mustafa, PhD • Human Resource Ketua, Unit Inovasi & Ketua, Unit Sains & • Audit Teknologi Elastomer Teknology Lateks • Integrity ([email protected]) ([email protected]) Copyright © Malaysian Rubber Board SCOPE, OBJECTIVE & FUNCTION of UNITS • Develop and diversify value- • R&D in natural and synthetic added dry rubber products latex-based thin-wall and foam • Focus on Industrial Rubber products Goods, General Rubber • Product degradation, energy Goods, Tire Technology and efficiency in product advanced composites manufacture, latex stability and • Provide consultative and preservation, blends, 01 technical advisory services on 03 nanocomposite
  • Asphalt Pavement Material Improvement: a Review

    Asphalt Pavement Material Improvement: a Review

    International Journal of Environmental Science and Development, Vol. 5, No. 5, October 2014 Asphalt Pavement Material Improvement: A Review Mohamed Sulyman, Maciej Sienkiewicz, and Jozef Haponiuk modifier raw materials (plastics or crumb rubber) at low costs Abstract—The recycling of solid industrial wastes (SIW) such and provide a solution to the ecological menace imposed by as waste rubber tires and plastics will not only solve the global the increase disposal of waste tires and plastics [3]. environmental problem of these SIW but also act as very promising modifiers for the improvement of engineering characteristics of the asphalt pavement material. The present work was concerned with assisting the interested II. HISTORY OF ASPHALT MIX INVENTION readers to be familiarized with the paving material The actions of modifying the asphalt paving material have asphalt-modifiers obtained from SIW by providing historical begun long time ago and hopes were sought initially in earlier perspective on its first invention and development. The paper experiments of incorporating natural rubber with asphalt in has also provided highlights on common processes of asphalt mixture production. It was also worth mentioning that there are 1840s, in order to capture the flexible nature of rubber in a two asphalt production technologies: the warm mix asphalt longer lasting paving surface. Unfortunately, the aim was (WMA) and hot mix asphalt (HMA) technologies, and the difficult to attain and the asphalt-rubber formulas did not various advantages of using each one. bring a benefit, and the result was a modified asphalt Additionally, the paper has provided the reader with an pavement material that was more costly and shorter in service overview of a number of case studies which were conducted by life than ordinary asphalt [4].
  • 2Mhgmg5cabqzvsu76ttethveqbq

    2Mhgmg5cabqzvsu76ttethveqbq

    Vol. 33 No. 12 Covering News & Developments in Tire and Rubber Recycling December 2019 Virginia Highway 60 near Richmond was paved last month with rubber asphalt containing 140,000 pounds of engineered crumb rubber….see pg. 5 6,000,000 TONS TRANSPORTED IN 3 YEARS TIRES SHREDDED IN 3 MINUTES HIGH-PERFORMANCE TIRE SHREDDERS Our range of high-torque tire shredders and systems are capable of processing automobile, truck and off-road tires at rates in excess of 20 tons per hour. CONTACT US FOR DETAILS shred-tech.com | 1.800.465.3214 Research & Development Engineering Manufacturing Parts and Service Europe Recycling Pyrolyx And Continental Enter Supply 92 Percent Of Scrap Deal For Recovered Carbon Black Tires Five year deal is a ‘game changer’ for Pyrolyx and the recovered New ETRMA report carbon black industry says the European tire Recovered carbon industry is committed black producer Pyro- to an innovative and lyx A.G. and Con - sustainable economy tinental Tire have entered a five-year Ninety-two percent of all agreement for Pyrolyx end-of-life tires in Europe in to supply recovered 2017 were collected and used carbon black (rCB) to for either material recycling Continental for use in or energy recovery, according manufacturing tires at to a report from the European its plants worldwide. Tyre and Rubber Manufactur- ers' Association (ETRMA). Continental, a tech- nology company and This compares with recycling manufacturer of pre- recovery rates in recent years mium tires, and Pyro- which fluctuated between lyx have been coop- 93 percent to 95 percent in erating on technology Continental Tire plans to use recovered carbon black in manufacturing Europe, the ETRMA said in a developments in the various tire segments Nov.
  • Influence of Road Wetness on Tire-Pavement Rolling Resistance

    Influence of Road Wetness on Tire-Pavement Rolling Resistance

    Journal of Civil Engineering and Architecture 9 (2015) 1302-1310 doi: 10.17265/1934-7359/2015.11.004 D DAVID PUBLISHING Influence of Road Wetness on Tire-Pavement Rolling Resistance Jerzy Ejsmont1, Leif Sjögren2, Beata Świeczko-Żurek1 and Grzegorz Ronowski1 1. Technical University of Gdańsk (TUG), Mechanical Faculty, Gdańsk 80 233, Poland 2. Swedish National Road and Transport Research Institute (VTI), Linköping 581 95, Sweden Abstract: Rolling resistance of tires is one of the most important factors influencing energy consumption of road vehicles, especially on rural roads. For practical reasons, most of rolling resistance measurements are usually performed for dry road conditions. Based on the fact that roads are wet during a considerable time over the year and as part of the projects MIRIAM, ROLRES and ROSANNE, the TUG (Technical University of Gdańsk) in Poland and VTI (Swedish National Road and Transport Research Institute) in Sweden carried out trailer rolling resistance measurements on wet road surfaces to investigate water film influence on rolling resistance on different pavements. A specially-designed trailer to measure rolling resistance has been used. The test sections were both rural roads and an abandoned airfield equipped with water film sensors mounted in the pavement. Results indicate strong influence of test speed and water film depth, as well as influence of surface texture. The increase of rolling resistance on wet surfaces is caused by both hydrodynamic phenomena and cooling effect of water that decreases tire temperature thus increasing rolling resistance. Key words: Tires, rolling resistance, road wetness, water film. 1. Introduction parameter is precipitation. Considering road construction, the drainage performance and the Rolling resistance is one of the most important pavement design (material and structure) are the most functional properties of road pavements.
  • (Gtr) in Asphalt Pavements: Literature Review and Dot Survey

    (Gtr) in Asphalt Pavements: Literature Review and Dot Survey

    USE OF GROUND TIRE RUBBER (GTR) IN ASPHALT PAVEMENTS: LITERATURE REVIEW AND DOT SURVEY FINAL REPORT Submitted to: Ferrella March Environmental Programs Manager Oklahoma Department of Environmental Quality Land Protection Division Submitted by: Rouzbeh Ghabchi, Ph.D. Musharraf Zaman, Ph.D., P.E. Amir Arshadi, Ph.D. School of Civil Engineering and Environmental Science (CEES) The University of Oklahoma Norman, Oklahoma September 2016 1 TABLE OF CONTENTS LIST OF ACRONYMS………………………………………………………………………….4 LIST OF FIGURES AND TABLES …………………………………………………………....7 ABSTRACT ................................................................................................................................... 7 BACKGROUND ........................................................................................................................... 9 PRODUCTION OF GTR-MODIFIED BINDERS AND MIXES .......................................... 12 Wet Process ............................................................................................................................... 15 Current Market for the Wet Process/Terminal Blend Rubber ............................................... 19 Dry Process ............................................................................................................................... 20 Laboratory and Field Data Supporting the Effectiveness of Dry Process ............................. 22 Implications for Dry Process CRM Asphalt .......................................................................... 33 Field Verification
  • Developing a Sustainable Waste Tire Management Strategy for Thailand

    Developing a Sustainable Waste Tire Management Strategy for Thailand

    Developing a Sustainable Waste Tire Management Strategy for Thailand Sponsored by the National Science and Technology Development Agency March 1, 2013 Kailyn Connor Orachitr Bijaisoradat Steven Cortesa Nachnicha Kongkatigumjorn Shakhizada Issagaliyeva Kunathon Wattanavit Adam Meunier Professor Seth Tuler, Co-Advisor Professor Stanley Selkow, Co-Advisor Professor Supawan Tantayanon, Co-Advisor 1 Developing a Sustainable Waste Tire Management Strategy for Thailand An Interactive Qualifying Project Report submitted to the Faculty of Worcester Polytechnic Institute in partial fulfillment of the requirements for the Degree of Bachelor of Science in cooperation with Chulalongkorn University Submitted on March 1st, 2013 Submitted by: Submitted to: Kailyn Connor Ms. Jiratchaya Duangburong Steven Cortesa Shakhizada Issagaliyeva Adam Meunier Co-Authors: Project Advisors: Orachitr Bijaisoradat Professor Seth Tuler, Nachnicha Kongkatigumjorn Professor Stanley Selkow Professor Supawan Tantayanon Kunathon Wattanavit This report represents the work of four WPI and three CU undergraduate students submitted to the faculty as evidence of completion of a degree requirement. WPI routinely publishes these reports on its website without editorial or peer review. For more information about the projects program at WPI, please see http://www.wpi.edu/Academics/Project i Abstract Thailand’s National Science and Technology Development Agency is seeking to develop a successful program to manage approximately 600,000 tonnes of waste tires generated annually in Thailand. This project investigated Thailand-specific issues and options for a viable long-term waste tire management strategy. We evaluated current practices, potential technologies, and successful systems from foreign nations to draw conclusions and make recommendations regarding which technologies are most applicable to Thailand. We made additional recommendations concerning which aspects of a waste tire management system needed to be newly implemented or continued to be used and improved.
  • Devulcanization Technologies for Recycling of Tire-Derived Rubber: a Review

    Devulcanization Technologies for Recycling of Tire-Derived Rubber: a Review

    materials Review Devulcanization Technologies for Recycling of Tire-Derived Rubber: A Review Erich Markl and Maximilian Lackner * University of Applied Sciences FH Technikum Wien, A-1200 Vienna, Austria; [email protected] * Correspondence: [email protected] Received: 20 January 2020; Accepted: 2 March 2020; Published: 10 March 2020 Abstract: In general, composite materials are difficult to recycle. Tires belong to this class of materials. On top, one of their main constitutents, vulcanized rubber, is as elastomer, which cannot be remolten and hence is particularly challenging to put to a new use. Today, the main end-of-life routes of tires and other rubber products are landfilling, incineration in e.g., cement plants, and grinding to a fine powder, generating huge quantities and indicating a lack of sustainable recycling of this valuable material. True feedstock recycling is not feasible for complex mixtures such as tires, but devulcanization can be done to reactivate the cross-linked polymer for material recycling in novel rubber products. Devulcanization, i.e., the breaking up of sulfur bonds by chemical, thermophysical, or biological means, is a promising route that has been investigated for more than 50 years. This review article presents an update on the state-of-the art in rubber devulcanization. The article addresses established devulcanization technologies and novel processes described in the scientific and patent literatures. On the one hand, tires have become high-tech products, where the simultaneous improvement of wet traction, rolling resistance, and abrasion resistance (the so-called “magic triangle”) is hard to achieve. On the other hand, recycling and sustainable end-of-life uses are becoming more and more important.
  • The Manager (Deptt. of Corporate Services) BSE Limited Phiroze

    The Manager (Deptt. of Corporate Services) BSE Limited Phiroze

    Date: May 23, 2021 To, To, The Manager (Deptt. of Corporate Services) The Secretary, BSE Limited Calcutta Stock Exchange Limited Phiroze Jeejeebhoy Towers, 7, Lyons Range, Dalal Street , Mumbai-400001. Kolkata-700001 Scrip Code: 530475 Subject: Investor Presentation Dear Sir/Ma’am, Pursuant to Regulation 30 of SEBI (Listing Obligations and Disclosure Requirements) Regulations 2015, we enclose herewith a copy of Investor Presentation that will be shared with the investors. The same shall be uploaded on our website www.tinna.in We request you to kindly take the above information on record. Thanking you For Tinna Rubber and Infrastructure Limited Digitally signed by VAI B H AV VAIBHAV PANDEY Date: 2021.05.23 PAN DEY 14:57:13 +05'30' Vaibhav Pandey (Company Secretary) M. No. A-53653 INVESTOR PRESENTATION May 2021 @® Lincsee. Caring for Environmen t Company Overview €> ) Company Overview Ciccscte.. | Caring for Environment| * Tinna Rubber & Infrastructure Limited (TRIL), was founded in 1977 under the visionary leadership Operational Revenue (In INR Mn) of Mr Bhupinder Kumar Sekhri. EBITDA Margins (%) 1,297 * The company transforms end of life Truck and Bus Radial (TBR) tyres into rubber and steel, which 1,227 13.0% further have application in new tyres/conveyor belts and other rubber moulded products and roads. Steel derived during the process is used for making steel abrasives. *- Today the company is the largest integrated waste tyre recycler in India and among the global leaders in the manufacturing of recycled rubber materials, with manufacturing facilities spread across India at Panipat (Haryana), Kalamb (Himachal Pradesh), Haldia (West Bengal), FY17 FY18 FY19 FY20 9M-FY21 Gumudipoondi (Tamil Nadu) and Wada (Maharashtra).
  • Resource Responsible Use of Recycled Tire Rubber in Asphalt Pavements

    Resource Responsible Use of Recycled Tire Rubber in Asphalt Pavements

    Resource Responsible Use of Recycled Tire Rubber in Asphalt Pavements PUBLICATION NO. FHWA-HIF-20-043 April 2020 FOREWORD Pneumatic tires are designed to fulfill fundamental functions throughout their useful lives like cushioning, damping, transmitting of torque (driving and braking), dimensional stability, abrasion resistance, efficient rolling resistance, and durability. Lacking the ability to recycle old tires into new tires, there are several common repurposing methods to effectively reuse rubber. Recycling of rubber from old tires may include but is not limited to: tire-derived fuel, ground tire rubber, and civil engineering applications. GTR is the second highest consumer of recycled tire rubber. This informational brief provides a review and update on the various GTR processes used in production of asphalt pavements. It presents the most recent waste tire data along with a historical perspective of GTR use as a modifier for asphalt binders and as an additive in asphalt mixtures. Consideration for responsible use of GTR is given to promote sustainable use of GTR in asphalt pavements. Additional detailed information can be obtained from Federal Highway Administration (FHWA) publication FHWA-HIF-14-015 on The Use of Recycled Tire Rubber to Modify Asphalt Binder and Mixtures. The FHWA has an ongoing Accelerated Implementation and Deployment of Pavement Technologies (AIDPT) Program, which includes the deployment of innovative technologies to improve pavement performance and reduce agency risk. This report was prepared under Development and Deployment of Innovative Asphalt Pavement Technologies Cooperative Agreement with the University of Nevada, Reno. Notice This document is disseminated under the sponsorship of the U.S. Department of Transportation (USDOT) in the interest of information exchange.
  • Functionalization of Crumb Rubber Surface for the Incorporation Into Asphalt Layers of Reduced Stiffness: an Overview of Existing Treatment Approaches

    Functionalization of Crumb Rubber Surface for the Incorporation Into Asphalt Layers of Reduced Stiffness: an Overview of Existing Treatment Approaches

    recycling Review Functionalization of Crumb Rubber Surface for the Incorporation into Asphalt Layers of Reduced Stiffness: An Overview of Existing Treatment Approaches Christina Makoundou 1,* , Kenth Johansson 2, Viveca Wallqvist 2 and Cesare Sangiorgi 1 1 Department of Civil, Chemical, Environmental and Materials Engineering, University of Bologna, 40131 Bologna, Italy; [email protected] 2 Department of Material and Surface Design, Research Institutes of Sweden (RISE), 114 28 Stockholm, Sweden; [email protected] (K.J.); [email protected] (V.W.) * Correspondence: [email protected]; Tel.: +39-05-1209-0215 Abstract: The substitution of mineral aggregates with crumb rubber (CR) from waste end-of-life tires (ELTs) in the asphalt concretes, has been considered a sustainable paving industry approach. The rubber has been used to construct pavements with proven enhanced resilience and improved durability. However, some issues related to the rubber’s surface adhesion or swelling may arise with these practices and generate complications (binder consumption, temperatures, mixing times). One possible solution to overcome the materials’ compatibility problems is to pre-treat the CR’s surface before its incorporation into the asphalt mixes to allow a surface functionalization that can enhance coverage and cohesion inside the mixes. The physical treatments using radiations-based beam are already exploited in the plastic recycling industries avoiding the use of chemicals in considerable amounts. Such treatments permit the recovering of large quantities of polymer-based materials and the enhancement of interfacial properties. This article provides an overview of existing Citation: Makoundou, C.; Johansson, surface treatments of polymers and especially rubber, including gamma ray, UV-ozone, microwaves, K.; Wallqvist, V.; Sangiorgi, C.