Understanding the Aging Depth Gradient Distribution of High Viscosity Modified Asphalt under the Effect of Solar Radiation and Diffuse Oxygen

2021 ◽  
Author(s):  
Mingjun Hu ◽  
Jianmin Ma ◽  
Daquan Sun ◽  
Senlin Ling ◽  
Tong Lu ◽  
...  
Keyword(s):  
Solar Radiation ◽  
High Viscosity ◽  
Depth Gradient ◽  
Gradient Distribution ◽  
Modified Asphalt

Laboratory Investigation of the Adhesion and Self-Healing Properties of High-Viscosity Modified Asphalt Binders

2020 ◽  
Vol 2674 (1) ◽  
pp. 307-318 ◽  
Author(s):  
Mingjun Hu ◽  
Daquan Sun ◽  
Tong Lu ◽  
Jianmin Ma ◽  
Fan Yu
Keyword(s):  
Water Immersion ◽  
Gel Permeation Chromatography ◽  
High Viscosity ◽  
Healing Time ◽  
Adhesion Property ◽  
Asphalt Binders ◽  
Self Healing ◽  
Porous Asphalt ◽  
Modified Asphalt ◽  
Water Damage

Water damage often occurs on porous asphalt pavement during service life because of the well-developed pore structure. Determining the adhesion and adhesion healing properties of high-viscosity modified asphalt (HVMA) under water condition is beneficial to understand the water damage process of porous asphalt. In this study, the modified binder bond strength test was first conducted to investigate the adhesion property and self-healing behavior of HVMA at different conditions. Then, the surface energy test was carried out to further characterize the differences in adhesion property of HVMA. Moreover, the gel permeation chromatography test and fluorescence microscopic test were used to investigate the influence of chemical composition and polymer morphology on the adhesion property of HVMA. Results show that the presence of water reduces the adhesion property of HVMA. The addition of polymers leads to an increasing adhesion strength and a decreasing self-healing ability of HVMA. The self-healing ability of HVMA improves with the increase of temperature, but also shows a decreased trend when the healing time is long at high-temperature water immersion. The effect of polymers on the adhesion property of asphalt has two aspects. First, the swelling of polymers leads to an increasing content of polar heavy components in HVMA, thus enhancing polarity adsorption between asphalt and aggregate. Moreover, a polymer-centered interfacial diffusion layer can be formed during the adsorption of light components, which increases the overlapping area of structural asphalt between adjacent aggregates. This can also improve the adhesion property at the asphalt–aggregate interface.

scholarly journals Kajian Penambahan RejIRE pada Aspal Modifikasi Crumb Rubber serta Kinerjanya pada Campuran Beraspal Panas

2019 ◽  
Vol 24 (2) ◽  
pp. 148
Author(s):  
Sri Mulyani ◽  
Nono Nono ◽  
Nyoman Suaryana
Keyword(s):  
Heavy Traffic ◽  
Permanent Deformation ◽  
Crumb Rubber ◽  
High Viscosity ◽  
Asphalt Mixtures ◽  
Modified Asphalt ◽  
Low Viscosity ◽  
Styrene Butadiene ◽  
Sbs Modified Asphalt ◽  
Rubber Modification

Asphalt polymer has superior characteristics than conventional asphalt. Styrene Butadiene Styrene (SBS) is a polymer that has proven its performance in heavy traffic, but it must be imported and expensive. Crumb rubber have high potential to be used as an asphalt modifier. Asphalt modified crumb rubber has high viscosity and is not homogeneous, so that the utilization cannot be delayed. This reduces workability in the field. This study aims to obtain asphalt modified crumb rubber which is easier to use by adding materials that do not affect its performance. RejIRE is a low viscosity additive to restore the properties of bitumen on crumb rubber modified. Experiments were carried out by adding variations in RejIRE levels to crumb rubber modified asphalt to determine its characteristics. Continued investigation of the performance of hot paved mixtures for wearing courses compared to asphalt mixtures with Pen 60/70 asphalt and SBS modified asphalt mixtures. The result is the addition of 0.75% RejIRE on asphalt crumb rubber modification have high workability. Overall the performance of the mix with SBS modified asphalt is better, but the mixture of hot paved with modified asphalt crumb rubber has a resistance to permanent deformation superior to the other paved mixtures.

Performance Evaluation of BRA Modified Asphalt Mastic Based on Analysis of Microstructure and Rheological Mechanics Property

2011 ◽  
Vol 243-249 ◽  
pp. 4119-4124 ◽  
Author(s):  
Long Wen ◽  
Xiao Jiang Wang ◽  
Hao Liu ◽  
Hao Xiang Wu ◽  
Bao Lin Cui ◽  
...  
Keyword(s):  
High Temperature ◽  
Environmental Scanning Electron Microscopy ◽  
Temperature Stability ◽  
High Viscosity ◽  
Environmental Scanning ◽  
High Temperature Stability ◽  
X Ray ◽  
Modified Asphalt ◽  
Asphalt Mastic ◽  
Performance Grade

Buton rock asphalt (BRA) is possessed of both performance and economic advantages. In order to reveal the modification mechanism, X-ray diffraction experiment (XRD), X-ray fluorescence spectrum analysis and environmental scanning electron microscopy experiment (ESEM) are used to study on microstructure of BRA in this paper. It demonstrates that BRA can extremely adsorb free bitumen due to abundant microscopic pores, which consists of 70~80 percent Buton rock (BR) minerals and 20~30 percent pure rock asphalt (RA). RA with high viscosity is strongly adsorbed internal and outer of the surface of BR, which has high alkaline pH, high crystallization and strong surface activity. Then a special microstructure named “RA~BR” blend with stable property and strong spalling-resistance capability develops. Meanwhile, dynamic stability rheology test (DSR) is employed to study on the rheological mechanics property of BRA modified asphalt mastic. The high temperature performance grade (PG) level of BRA modified asphalt mastic with different mixing content is determined. The reasonable mixing content of BRA in matrix asphalt is 20~30 percent. The research proves that BRA modified asphalt possesses wonderful high temperature stability and has broad prospects for pavement application.

scholarly journals Study on cohesion and adhesion of high-viscosity modified asphalt

2019 ◽  
Vol 8 (4) ◽  
pp. 394-402 ◽  
Author(s):  
Tan Yourong ◽  
Haiyan Zhang ◽  
Dongwei Cao ◽  
Lei Xia ◽  
Rongjie Du ◽  
...  
Keyword(s):  
High Viscosity ◽  
Modified Asphalt

scholarly journals Preparation and Performance Analysis of High-Viscosity and Elastic Recovery Modified Asphalt Binder

2019 ◽  
Vol 2019 ◽  
pp. 1-16 ◽  
Author(s):  
Liangchen Qu ◽  
Yingli Gao ◽  
Hui Yao ◽  
Dandan Cao ◽  
Ganpeng Pei ◽  
...  
Keyword(s):  
High Temperature ◽  
Low Temperature ◽  
Elastic Recovery ◽  
Asphalt Binder ◽  
Temperature Stability ◽  
Crumb Rubber ◽  
High Viscosity ◽  
High Temperature Stability ◽  
Modified Asphalt ◽  
And Performance

This study presented the preparation and performance of a kind of high viscosity and elastic recovery asphalt (HVERA) by using some modifiers. The performance of styrene-butadiene-styrene (SBS), rock asphalt (RA), crumb rubber (CR), and stabilizing agent (SA) for different modifiers was investigated by conventional binder test. Effects of modifiers on the high- and low-temperature properties of HVERA were investigated. The dynamic viscosity (DV) test, dynamic shear rheometer (DSR), and bending beam rheometer (BBR) analysis indicated that the high- and low-temperature rheological properties of asphalt were improved attribute to the addition of mixture of modifiers. Meanwhile, the short-term aging and long-term aging were simulated by rolling thin film oven (RTFO) and pressure aging vessel (PAV) tests. Furthermore, the Fourier transform infrared spectroscopy (FTIR) and scanning electron microscope (SEM) measurements were conducted for obtaining the mechanism and microstructure distribution of the modified asphalt binders. From the test results in this study, it was evident that the addition of SBS, RA, CR, and SA into a neat asphalt binder could both significantly improve the viscosity of the binder at high temperature and lower the creep stiffness at low temperature, which was beneficial to better both high-temperature stability and low-temperature cracking resistance of asphalt pavements. It was proved that the high temperature grade of HVERA could be increased by increasing of RA and a proper percentage of modifiers could be improved by the low temperature grade of HVERA.

Study on classical and rheological performance of high viscosity modified asphalt for porous asphalt mixture

2020 ◽  
pp. 36-44
Author(s):  
Haiyan Zhang ◽  
Hui Tang ◽  
Bin Xu ◽  
Dongwei Cao ◽  
Bo Yuan ◽  
...  
Keyword(s):  
Asphalt Mixture ◽  
High Viscosity ◽  
Porous Asphalt ◽  
Modified Asphalt ◽  
Rheological Performance

scholarly journals REPRODUCTION OF HIGH VISCOSITY MODIFIED ASPHALT & RECLAMATION OF POROUS ASPHALT MIXTURES

2004 ◽  
Vol 9 ◽  
pp. 101-108 ◽  
Author(s):  
Takara OKOCHI ◽  
Satoru HORIGUCHI ◽  
Hiromitsu NAKANISHI ◽  
Teruhiko MARUYAMA
Keyword(s):  
High Viscosity ◽  
Asphalt Mixtures ◽  
Porous Asphalt ◽  
Modified Asphalt
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