Influence of Buton Rock Asphalt on the Physical and Mechanical Properties of Asphalt Binder and Asphalt Mixture

Li, Yafei; Chen, Jing; Jin, Yan; Guo, Meng

doi:10.1155/2018/2107512

Cited by 13 publications

(16 citation statements)

References 15 publications

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“…The results of different experiments showed that BRA subjected to physical mixing revealed an improved softening point, and reduced penetration. In addition, it was observed that BRA modified asphalt prepared through the wet process presents a better performance in comparison to the corresponding material fabricated with the dry process [ 21 , 22 , 23 , 24 ]. The relationship between the microstructure and the performance of BRA modified asphalt was investigated by using surface free energy and an infrared spectrum analysis [ 25 ].…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation on the Use of Selenice Natural Bitumen as an Additive for Pavement Materials

Mai

Falchetto

et al. 2021

Materials

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As a good asphalt modifier, natural asphalt has been the focus of more attention because of its low price and ability to improve the performance of modified asphalt. In this paper, the incorporation of a natural asphalt binder in the production of bituminous materials for pavement application in China was experimentally investigated to evaluate the feasibility of such a process and its potential benefits in terms of performance. For this purpose, an asphalt binder conventionally used in the south of China was blended with various percentages of a hard natural binder obtained from the region of Selenice in Albania. The content of Selenice natural bitumen (SNB) was 80.5%, having high molecular weight and the advantages of good stability and compatibility with virgin asphalt. The physical, rheological, and mechanical properties, as well as the modification mechanism of the binder and corresponding asphalt mixture, were evaluated in the laboratory. It was observed that the hard binder improved the response of the binder blend at high and intermediate temperature; this reflected a better stability, improved moisture susceptibility, and enhanced rutting resistance of the mixture. Fluorescence microscopy showed that after dissolving, the size of the SNB modifier became smaller and its distribution was uneven, presenting three forms, granular, agglomerated, and flocculent properties. Chemical test results showed that the modification mechanism of SNB was mainly related to the enhancement of hydrogen bonds and Van der Waals forces caused by sulfoxide and carbonyl along with the stress concentration caused by silica particles. Molecular composition revealed that the proportion of middle molecules has reduced while the proportion of large molecules has increased. It is considered that SNB is a promising low-priced natural modifier with excellent rutting resistance properties. Future research will be focused on the economic analysis, pavement life cycle assessment of SNB modified asphalt, and its application in perpetual pavements.

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Section: Introductionmentioning

confidence: 99%

Experimental Investigation on the Use of Selenice Natural Bitumen as an Additive for Pavement Materials

Mai

Falchetto

et al. 2021

Materials

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“…Li et al studied the effect of BRA on the physical and mechanical properties of asphalt binder and asphalt mixture. ey found that the activation treatment can effectively enhance the molecular polarity of Buton rock asphalt but the micromechanism needs to be explained [10]. Tan and Guo studied the cohesion and adhesion of asphalt mastic by using surface free energy method.…”

Section: Introductionmentioning

confidence: 99%

“…Most of the natural asphalt is distributed in the cracks of BRA. If it is not treated, it can be modified directly by blending it with base asphalt, which results in the effective asphalt that can play a very few role [10,13]. Nowadays, China only regards natural asphalt as a special asphalt modifier and has not formed a set of relatively perfect technical performance standard system.…”

Section: Introductionmentioning

confidence: 99%

Macroscopic and Microscopic Characterization of the Effect of “Activation” Process on the Performance of Buton Rock Asphalt‐Modified Asphalt

Guo

Liu

2020

Advances in Materials Science and Engineering

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In the process of using Buton rock asphalt- (BRA-) modified asphalt, in order to improve the utilization rate of Buton rock asphalt and the performance of the modified asphalt, this paper puts forward the process of “activation” treatment of Buton rock asphalt, that is, grinding and heating of BRA to make natural asphalt precipitate. Laboratory tests show that compared with modified asphalt without activation process, the penetration of the modified asphalt decreases, the softening point rises, the ductility at 5°C and the kinematic viscosity at 135°C all have been increased, and the performance of the modified asphalt increases with the increase of the content of activated BRA. In order to further clarify the effect of “activation” process on the properties of BRA-modified asphalt from microlevel, atomic force microscopy (AFM) was used to test the microproperties of Buton rock asphalt before and after activation. It is found that the Derjaguin–Muller–Toporov (DMT) modulus of the modified asphalt is about 2.5 times that of base asphalt, which indicates that the viscous degree of modified asphalt with activated BRA has been greatly increased and the modification effect is remarkable.

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“…Therefore, the fatigue performance of rock asphalt-modified bitumens was studied [15][16][17]. The results showed that the reduced dissipated energy ratio was a good evaluation index and that the fatigue performance of rock asphalt-modified bitumen depended on the loading mode of the test.…”

Section: Introductionmentioning

confidence: 99%

Rheological Characteristics Evaluation of Bitumen Composites Containing Rock Asphalt and Diatomite

Huang

Wang

He³

et al. 2019

Applied Sciences

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Previous studies have showed that rock asphalt (RA) or diatomite were used to modify the petroleum bitumen. This paper presents the findings from a study conducted to evaluate the potential impact of RA and diatomite on the rheological characteristics of bitumen composites. RA and diatomite with three different dosages were added into the petroleum bitumen: 18% RA, 13% RA+7% diatomite, and 16% RA+9% diatomite by weight. The rheological characteristics of the RA and diatomite modified bitumens were evaluated in this study. The tests conducted included temperature sweep and frequency sweep tests with a dynamic shear rheometer (DSR), a Brookfield rotation viscosity test, and a scanning electron microscope test. The research showed that the addition of RA and diatomite to petroleum bitumen considerably increased the apparent viscosity, dynamic shear modulus, and rutting resistance in bitumen specimens. However, the DSR test indicated a slight reduction in the fatigue performance of composites made of RA and diatomite modified bitumens. Overall, RA and diatomite are good modifiers for petroleum bitumen for a performance improvement.

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Influence of Buton Rock Asphalt on the Physical and Mechanical Properties of Asphalt Binder and Asphalt Mixture

Cited by 13 publications

References 15 publications

Experimental Investigation on the Use of Selenice Natural Bitumen as an Additive for Pavement Materials

Experimental Investigation on the Use of Selenice Natural Bitumen as an Additive for Pavement Materials

Macroscopic and Microscopic Characterization of the Effect of “Activation” Process on the Performance of Buton Rock Asphalt‐Modified Asphalt

Rheological Characteristics Evaluation of Bitumen Composites Containing Rock Asphalt and Diatomite

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