Investigations on behavioral characteristics of asphalt binder with crumb rubber modification: Rheological and thermo-chemical approach

Venudharan, Veena; Biligiri, Krishna Prapoorna; Das, Poushali

doi:10.1016/j.conbuildmat.2018.06.087

Cited by 40 publications

(14 citation statements)

References 20 publications

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“…Rubberized asphalt concrete generally improve durability, reduce aging and oxidation, and enhance resistance to fatigue cracking, rutting, and reflective cracking. Furthermore, CRM asphalt binders lower costs of maintenance, noise generation, and improve skid resistance [4][5][6][7][8][9][10]. Despite these benefits, there are concerns in the application of CR in asphalt.…”

Section: Introductionmentioning

confidence: 99%

Performance Evaluation of Crumb Rubber Asphalt Modified with Silicone‐Based Warm Mix Additives

Lushinga

Cao

Zhang

et al. 2020

Advances in Civil Engineering

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This research was conducted to elucidate better understanding of the performance of crumb rubber asphalt modified with silicone-based warm mix additives. Two different silicone-based warm mix asphalt (WMA) additives (herein Tego XP and Addibit) were used to prepare crumb rubber modified (CRM) warm mix asphalt binders. The viscosity of these CRM binders was measured at different temperatures and shearing rates. Furthermore, softening point and penetration tests, Multiple Stress Creep Recovery (MSCR), Time Sweep (TS), Atomic Force Microscopy (AFM), Frequency sweep (FS), and Fourier Transform Infrared (FTIR) tests were also conducted on prepared samples. Based on these robust and rigorous laboratory experiments, it was established that viscosity of CRM binders was reduced by addition of Tego XP and Addibit WMA additives. However, WMA additives had different influence on rheological properties of the binder. CRM binder with Tego XP improved resistance to rutting of the binders but would degrade the fatigue performance. On the contrary, viscoelastic continuum damage (VECD) model results and those of phase angle approach revealed that the binder with Addibit improved resistance to fatigue cracking of the binders but had no adverse effects on high temperature rutting performance. FTIR test results established a presence of polydimethylsiloxane (PDMS) in CRM binders with Tego XP and Addibit. PDMS is a well-known hydrophobic organic and inorganic polymer that is water repellent; therefore, binders containing these silicone-based warm mix additives could be beneficial in resisting moisture damage in asphalt binders and mixtures. Morphology of CRM binders with and without WMA revealed good distribution of the rubber particles in asphalt binder matrix. Further addition of WMA increased surface roughness of the binder, which can be correlated to changes in microstructure properties of the binder. Therefore, the study concluded that addition of Tego XP and Addibit reduces viscosity and improves mechanical properties of the asphalt binder.

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Section: Introductionmentioning

confidence: 99%

Performance Evaluation of Crumb Rubber Asphalt Modified with Silicone‐Based Warm Mix Additives

Lushinga

Cao

Zhang

et al. 2020

Advances in Civil Engineering

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“…During thermal weightlessness, the higher the aging degree, the larger the mass residual rate (Chen et al, 2019). The reason is that the component easily decomposing converts into relatively stable macromolecular structure, which increases the intermolecular force and thermal stability (Venudharan et al, 2018). From Figure 11 one can see that the residual rate of TB-A is the highest compared to the base asphalt and is increased by 10.4% compared to base asphalt.…”

Section: Thermogravimetric Analysismentioning

confidence: 98%

Study on Preparation Method of Terminal Blend Rubberized Asphalt Binder

2020

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Terminal Blend (TB) asphalt rubber is prepared by being sheared with high speed for a long time a high temperature and has good low temperature performance and anti-fatigue performance. But due to the aging of asphalt and desulfurization and degradation of crumb rubber, the high temperature performance of TB is not ideal. In order to propose an effective way to solve this problem and improve the high temperature performance, a series of TB-B and TB-C asphalt were prepared with crumb rubber by changing dosage and preparation temperature in nitrogen environment and soluble crumb rubber in atmospheric environment, respectively. As a comparison group, TB-A asphalt was prepared using crumb rubber under atmospheric environment. Dynamic shear rheometer (DSR) and binding beam rheometer (BBR) were used to investigate the rheological characteristics, polymer segregation experiment was performed to evaluate the storage stability, and Fourier Transform Infrared (FTIR) spectroscopy and thermogravimetric analysis were carried out to explore the aging degree of asphalt. TB-A had good storage stability but was brittle due to serious asphalt aging during preparation, and its high and low temperature performance were not good. The introduction of nitrogen could effectively decline aging degree and guaranteed TB-B best comprehensive performance among these three kinds of modified asphalt. Soluble crumb rubber was obtained by pretreating crumb rubber and making it desulfurize and degrade, which reduced the preparation and consequently inhibit the occurrence of aging. The high and low temperature properties of TB-C met specification, but storage stability was not insufficient when crumb rubber content was more than 15%. Overall, both preparation in nitrogen environment with conventional crumb rubber and preparation in atmospheric environment with soluble crumb rubber can effectively alleviate the aging degree of TB asphalt.

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“…In Table 7, results show the potential issues with the use of truck CR as the values change so significantly among 15% CR, 85% asphalt binder, and 18.5% CR, 81.5% asphalt binder [59]. Furthermore, CRmodified asphalt showed a better pavement performance compared to that of the base binders as a result of the interaction of CR with the base binder [102].…”

Section: Softening Point Testmentioning

confidence: 99%

A review of the feasibility of using crumb rubber derived from end-of-life tire as asphalt binder modifier

Milad

Ahmeda²,

Taib

et al. 2020

J Rubber Res

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The use of recycled crumb rubber (CR) in asphalt pavements could be an essential step towards ensuring a more sustainable future in addition to opening a new investment opportunity for global investors. Asphalt modifiers have the ability to enhance the performance of flexible pavements and contribute towards ensuring a more sustainable environment. The utilization of CR produced from end-of-life tires (ELTs) as an asphalt modifier has been shown to enhance asphalt performance with regard to high-temperature rutting and low-temperature thermal cracking due to the remarkable characteristics of the CR. This paper presents the findings of previous studies, including the grinding of ELTs to obtain crumb rubber, the technology employed in the process, and the physical and mechanical properties of the asphalt modifiers. Even though the present study focuses on the application of hot-mix asphalt (HMA), there are other methods, for instance, warm-mix asphalt (WMA), reclaimed asphalt pavement (RAP), and porous asphalt, that used CR as a modifier or as an additive in asphalt binders. A review of the literature suggests that most CR have a good performance and are suitable for use in the top paving layer to reduce noise as well as for other applications.

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Investigations on behavioral characteristics of asphalt binder with crumb rubber modification: Rheological and thermo-chemical approach

Cited by 40 publications

References 20 publications

Performance Evaluation of Crumb Rubber Asphalt Modified with Silicone‐Based Warm Mix Additives

Performance Evaluation of Crumb Rubber Asphalt Modified with Silicone‐Based Warm Mix Additives

Study on Preparation Method of Terminal Blend Rubberized Asphalt Binder

A review of the feasibility of using crumb rubber derived from end-of-life tire as asphalt binder modifier

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