Enhancing Asphalt Rheological Behavior and Aging Susceptibility Using Bio-Char and Nano-Clay

Walters, Renaldo C.; Fini, Elham H.; Abu-Lebdeh, Taher

doi:10.3844/ajeassp.2014.66.76

Cited by 56 publications

(29 citation statements)

References 19 publications

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“…A pulp and paper mill sludge bio-char, with a content of 0.1% of total volume, was found to improve the mechanical strength of conventional concrete [32]. A 10 wt% swine manure bio-char decreases the temperature susceptibility and shear susceptibility of asphalt binder [33]. A 10 wt% switchgrass bio-char also significantly reduces the temperature susceptibility of asphalt binder and increases the moisture, cracking and rutting resistance of asphalt mixture [34,35].…”

Section: Introductionmentioning

confidence: 99%

Rheological Performance of Bio-Char Modified Asphalt with Different Particle Sizes

et al. 2018

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To improve the performance of petroleum asphalt, bio-char was used as a modifier for a petroleum asphalt binder, in this study. The rheological properties of bio-char modified asphalt binders were compared with different particle sizes and contents, with one control and one flake graphite modified asphalt binder. Specifically, the bio-char modifiers with two particle sizes (ranging from 75 μm–150 μm and less than 75 μm) and three contents of 2%, 4%, and 8% were added into the asphalt binder. A flake graphite powder with particle sizes less than 75 μm was used as a comparison modifier. The Scanning Electron Microscopy (SEM) image showed the porous structure and rough surface of bio-char as well as dense structure and smooth surface of flake graphite. A Rotational Viscosity (RV) test, Dynamic Shear Rheometer (DSR) test, aging test, and Bending Beam Rheometer (BBR) test were performed to evaluate the properties of bio-char modified asphalt in this study. Both modifiers could improve the rotational viscosities of the asphalt binders. The porous structure and rough surface of bio-char lead to larger adhesion interaction in asphalt binder than the smooth flake graphite. As a result, the bio-char modified asphalts had better high-temperature rutting resistance and anti-aging properties than the graphite modified asphalt, especially for the binders with the smaller-sized and higher content of bio-char particles. Furthermore, the asphalt binder modified by the bio-char with sizes less than 75 μm and about 4% content could also achieve a better low-temperature crack resistance, in comparison to other modified asphalt binders. Thus, this type of bio-char particles is recommended as a favorable modifier for asphalt binder.

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Section: Introductionmentioning

confidence: 99%

Rheological Performance of Bio-Char Modified Asphalt with Different Particle Sizes

et al. 2018

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“…7 Essentially, HTL consists of the rapid decomposition of materials in a vacuum space to convert the biomass into liquid bio oil and some byproducts. 8 One of the byproducts of pyrolysis is Biochar, a carbonaceous solid waste matter that is a viable option to add to an asphalt binder due to its carbon morphology.…”

Section: Literature Reviewmentioning

confidence: 99%

“…Biochar is an additive that has been shown to enhance the performance of asphalt binder when added. 2 Rutting and cracking are two major distresses occurring to flexible pavements. Researchers and practitioners have employed different test methods to characterize the fracture resistance of HMA.…”

Section: Introductionmentioning

confidence: 99%

Performance Testing of Hot Mix Asphalt Containing Biochar

Saadeh¹,

Alzubi²,

Zaatarah³

2020

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Founded in 1991, the Mineta Transportation Institute (MTI), an organized research and training unit in partnership with the Lucas College and Graduate School of Business at San José State University (SJSU), increases mobility for all by improving the safety, efficiency, accessibility, and convenience of our nation's transportation system. Through research, education, workforce development, and technology transfer, we help create a connected world. MTI leads the four-university. MTI leads the four-university California State University Transportation Consortium funded by the State of California through Senate Bill 1. MTI's transportation policy work is centered on three primary responsibilities: MINETA TRANSPORTATION INSTITUTE Research MTI works to provide policy-oriented research for all levels of government and the private sector to foster the development of optimum surface transportation systems. Research areas include: bicycle and pedestrian issues; financing public and private sector transportation improvements; intermodal connectivity and integration; safety and security of transportation systems; sustainability of transportation systems; transportation / land use / environment; and transportation planning and policy development. Certified Research Associates conduct the research. Certification requires an advanced degree, generally a Ph.D., a record of academic publications, and professional references. Research projects culminate in a peer-reviewed publication, available on TransWeb, the MTI website (http://transweb.sjsu.edu). Education The Institute supports education programs for students seeking a career in the development and operation of surface transportation systems. MTI, through San José State University, offers an AACSBaccredited Master of Science in Transportation Management and graduate certificates in Transportation Management, Transportation Security, and High-Speed Rail Management that serve to prepare the nation's transportation managers for the 21st century. With the active assistance of the California Department of Transportation (Caltrans), MTI delivers its classes over a state-of-the-art videoconference network throughout the state of California and via webcasting beyond, allowing working transportation professionals to pursue an advanced degree regardless of their location. To meet the needs of employers seeking a diverse workforce, MTI's education program promotes enrollment to under-represented groups. Information and Technology Transfer MTI utilizes a diverse array of dissemination methods and media to ensure research results reach those responsible for managing change. These methods include publication, seminars, workshops, websites, social media, webinars, and other technology transfer mechanisms. Additionally, MTI promotes the availability of completed research to professional organizations and journals and works to * = Ex-Officio ** = Past Chair, Board of Trustees

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“…The role of using bio-asphalt in new asphalt mixtures is currently considered as one of the main alternatives for the reduction of environmental and health effect, the final cost of hotmix asphalt (HMA) pavement construction, and minimize strong demand of conventional asphalt binder [1][2][3][4][5][6][7][8][9][10]. Some of these bio-binders studied and showed promising results include: sugar cane molasses [11][12][13][14], beet molasses 15 , swine manure 1,[16][17][18] , waste cooking oil [6], [19][20][21], and wood waste 22,23 . However,the study shows that bio-asphalts are highly moisture susceptible due to high volume water content and moisture can have a profound effect on the durability of HMA pavement.…”

Section: Introductionmentioning

confidence: 99%

Rheological Properties and Application of Molasses Modified Bitumen in Hot Mix Asphalt (HMA)

Hareru

Ghebrab²

2020

Preprint

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The high volume of water in molasses has made this study serious. The reason is that using molasses as a partial replacement without treatment significantly affects the rheological properties of the neat bitumen and increases the likelihood of moisture susceptibility of the hotmix asphalt (HMA) pavement structure and create fractures of aggregate particles. Therefore, to use molasses as a partial replacement without affecting the structural integrity of the pavement, this study proposed a treatment method before blending it with petroleum-based bitumen. A series of experiment was conducted to accomplish the objective of this paper, including convectional tests, Fourier transform infrared (FTIR) test, amplitude and frequency sweep test, performance grade (PG) determination test, and multiple stress creep recovery (MSCR) tests. The IR spectra show that carbonyl index decreased with increasing molasses percent. There was PG improvement from the control grade to PG64 and PG70 when the base binder modified with 5-20% molasses and aged with rollingl thin film oven (RTFO) respectively. At the temperature 58 o C nonrecoverable creep compliance at 3.2 kPa (Jnr3.2kPa) was decreased for each percent replacement. This led to improving the rutting potential. As well, at a temperature of 64 o C the Jnr value was decreased only for 5% replacement, and then the Jnr value was gradually increased for the remaining percent replacement. Overall, this study revealed that treated molasses can be used as a partial replacement to enhance the rheological properties of the base bitumen and thus it can potentially be used to produce a sustainable bio-asphalt binder.

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Enhancing Asphalt Rheological Behavior and Aging Susceptibility Using Bio-Char and Nano-Clay

Cited by 56 publications

References 19 publications

Rheological Performance of Bio-Char Modified Asphalt with Different Particle Sizes

Rheological Performance of Bio-Char Modified Asphalt with Different Particle Sizes

Performance Testing of Hot Mix Asphalt Containing Biochar

Rheological Properties and Application of Molasses Modified Bitumen in Hot Mix Asphalt (HMA)

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