Research on Self-Healing Technology of SBS Modified Asphalt Concrete under the Dynamic Loading

2020 ◽  
Vol 207 (1) ◽  
pp. 12-26
Author(s):  
Jun Song ◽  
Fuyan Chen ◽  
Guangxiu Guo
Keyword(s):  
Dynamic Loading ◽  
Asphalt Concrete ◽  
Self Healing ◽  
Modified Asphalt ◽  
Sbs Modified Asphalt

scholarly journals Enhancing Effect of Waste Engine Oil Bottom Incorporation on the Performance of CR+SBS Modified Bitumen: A Sustainable and Environmentally-Friendly Solution for Wastes

2021 ◽  
Vol 13 (22) ◽  
pp. 12772
Author(s):  
Changjiang Liu ◽  
Qiuping Wang
Keyword(s):  
Asphalt Binder ◽  
Engine Oil ◽  
Chemical Compositions ◽  
Self Healing ◽  
Temperature Property ◽  
Modified Bitumen ◽  
Modified Asphalt ◽  
Waste Engine Oil ◽  
Sbs Modified Asphalt ◽  
Low Temperature Property

Waste engine oil bottom (WEOB) is a hazardous waste whose effect as an additive to CR+SBS modified asphalt is rarely studied. In this study, the CR+SBS asphalt binder was modified with WEOB in different concentrations (3, 6, and 9 wt%). The GC–MS and FTIR were performed to evaluate the chemical compositions of WEOB and WEOBCR+SBS asphalt. The results showed that the main constituents of WEOB were similar to the functional groups of asphalt, along with maleic anhydride (MAH). Pavement performance-related rheological tests such as RV, temperature sweep (TS), FS, MSCR, and BBR were carried out. Results show that WEOBCR+SBS-6 exhibited the best high- and low-temperature property, followed by CR+SBS-3 and CR+SBS-9. Fluorescence microscope (FM) test, bar thin layer chromatograph (BTLC) test, FTIR, and AFM tests were carried out to evaluate the micro-morphologies and modification mechanism. The analysis revealed increased trends in resin fraction as opposed to asphaltene fraction with the increase of WEOB content. FTIR analysis revealed that the amide groups in WEOBCR+SBS asphalt bonded to the free radicals of CR. Moreover, a modification mechanism was elaborated. WEOB strengthens the cross-linked structure of CR+SBS polymers, reacting with SBS to graft onto MAH-g-SBS, and the free radical of CR interacts with the amide group in WEOB to form a bond. In addition, the content of lightweight components and surface roughness of SBS specimens were in good correlation, which contributed to the rutting resistance and adhesion and self-healing performance.

Study on the Piezoresistivity Character of Electrically Conductive Asphalt Concrete

2011 ◽  
Vol 233-235 ◽  
pp. 1756-1761 ◽  
Author(s):  
Xiao Ming Liu ◽  
Shao Peng Wu
Keyword(s):  
Asphalt Concrete ◽  
Raw Materials ◽  
Great Influence ◽  
Graphite Powder ◽  
Crumb Rubber ◽  
Highway Traffic ◽  
Electrically Conductive ◽  
Intelligent Monitoring ◽  
Modified Asphalt ◽  
Sbs Modified Asphalt

Raw materials, such as SBS modified asphalt, graphite powder and crumb rubber were selected to blend with aggregate mixture to product electrically conductive asphalt concrete. Experimental results demonstrated the stress or strain had a great influence on the resistance of conductive asphalt concrete, which exhibited sensitive piezoresistivity. In fact, the piezoresistivity reflects the change in microstructure. The reason for piezoresistivity may involve proximity effect, microcrack and the dislocation of conductive paths due to shear strength of aggregates. With further study on the variation of the resistance, it is hopeful to explore the microstructure change of asphalt concrete under dynamic compressive stress. Therefore this new-style asphalt concrete has extensively practical foreground in fatigue damage testing, highway traffic intelligent monitoring and so on.

Application Study on High Modulus Asphalt Concrete in Bridge Pavement

2011 ◽  
Vol 243-249 ◽  
pp. 4244-4247 ◽  
Author(s):  
Yun Liang Li ◽  
Yi Qiu Tan ◽  
Liang Meng
Keyword(s):  
Asphalt Concrete ◽  
Oil Field ◽  
Pavement Performance ◽  
High Modulus ◽  
Practical Application ◽  
Application Study ◽  
Damage Resistance ◽  
Modified Asphalt ◽  
Practical Project ◽  
Sbs Modified Asphalt

A type of high modulus asphalt was prepared by mixing modifier into SBS modified asphalt and used for confecting HMAC-16 high modulus asphalt concrete with finished product of modified asphalt from Liaohe oil field. This paper investigates pavement performance of high modulus asphalt concrete and its practical application in bridge pavement. Results obtained by application in practical project show that the high modulus asphalt concrete is provided with outstanding high-and-low temperature performance and water damage resistance which are suitable for bridge pavement.

Experimental Study on Fatigue Characteristics of Asphalt Concrete in Bridge Pavement

2011 ◽  
Vol 97-98 ◽  
pp. 280-283
Author(s):  
Yun Liang Li ◽  
Yi Qiu Tan
Keyword(s):  
Asphalt Concrete ◽  
Composite Structures ◽  
Experimental Studies ◽  
Fatigue Tests ◽  
Asphalt Mixtures ◽  
Modified Asphalt ◽  
Different Types ◽  
Fatigue Characteristics ◽  
Sbs Modified Asphalt ◽  
Better Than

This paper demonstrates a type of SBS modified asphalt which added 8% TPS as the mixture for bridge pavement. Four types of asphalt mixtures were designed for composing four types of material forms. The fatigue characteristics of different types of combination of materials are studied by three-point fatigue tests of small beams. Equations of fatigue characteristics are obtained based on the experimental studies. Results show that antifatigue characteristics of SMA13+AC16 are better than others, while the sensitive degrees of fatigue life of four composite structures are generally the same to stress level.

Experimental Investigation on Performance of Fiber Asphalt Mixture

2011 ◽  
Vol 374-377 ◽  
pp. 1396-1399
Author(s):  
Ju Hong Han ◽  
Jin Jun Guo ◽  
Zhong Liu
Keyword(s):  
Asphalt Concrete ◽  
Asphalt Mixture ◽  
Pavement Performance ◽  
Mixture Ratio ◽  
Modified Asphalt ◽  
Positive Effects ◽  
Road Performance ◽  
Sbs Modified Asphalt ◽  
Comprehensive Indicator

The paper investigates positive effects of three kinds of fibers on the performance of asphalt concrete mixture, which include mineral fiber (Fiberand®), lignin fiber and polyacrylonitrile (Dolanit@AS). The contrast experiments of AC-13 SBS modified asphalt mixture added fibers were carried out. The results reveal that the pavement performance can be improved remarkably if appropriate fibers are added into the asphalt mixture. The method of determining optimum mixture ratio was proposed on the basis of road performance of asphalt concrete. It is more reasonable to adopt comprehensive indicator containing stability and dynamic stability in determination of the optimum mixture ratio of asphalt concrete.

scholarly journals Evaluating the Influence of Polymer Modified Asphalt Binders on Low Temperature Properties

2018 ◽  
Vol 163 ◽  
pp. 05012
Author(s):  
Amal Abdelaziz ◽  
Chun-Hsing Ho ◽  
Matthew Snyder
Keyword(s):  
Low Temperature ◽  
Asphalt Concrete ◽  
Asphalt Binder ◽  
Traffic Load ◽  
Asphalt Binders ◽  
Concrete Pavements ◽  
Modified Asphalt ◽  
Modified Asphalt Binder ◽  
Low Temperature Cracking ◽  
Sbs Modified Asphalt

Low temperature cracking is one of the most common distress types in asphalt concrete pavements, particularly in cold regions. Many factors influence the behaviour of asphalt concrete pavements at low temperatures, such as the applied traffic load, environmental conditions and material characteristics. Asphalt binders are one of the primary factors that influence material properties. The purpose of this study is to compare the performance of two types of asphalt binders: styrene-butadiene-styrene (SBS) modified asphalt binder and unmodified asphalt binder in resisting low temperature cracking. The study was conducted in Flagstaff, located at the area of Northern Arizona, in the United States. Asphalt samples were collected from the paving sections and were compacted and trimmed into small beams. Bending Beam Rheometer tests were performed, using the trimmed specimens at temperatures of -6°C, -12°C and -18°C. Based on the results of the study, it was concluded that, SBS modified asphalt binder performs better in resisting low temperature cracking, compared to the unmodified binder. Based on the study outcomes, it is recommended to use SBS polymer modified polymers in areas subjected to severe cold weather events to maximize the life span of asphalt concrete pavements.

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