Complex shear modulus and phase angle of crumb rubber modified binders containing organic warm mix asphalt additives

Rodríguez-Alloza, Ana María; Gallego, Juan; Giuliani, Felice

doi:10.1617/s11527-016-0950-1

Cited by 38 publications

(18 citation statements)

References 20 publications

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“…The incorporation of the wax increases the solid-like behaviour, as stated by other studies [14,24].…”

Section: = • •supporting

confidence: 77%

“…It should also be noted that both binders show a lack of linearity probably due to the modification of the bitumen structure caused by the rubber. The CRM bitumen shows a slight "S" shape traditional of this type of bitumen, when the wax is added this shape disappears, probably due to the interactions between it and the polar fractions of bitumen (asphaltenes and resins) [24].…”

Section: = • •mentioning

confidence: 95%

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Porous asphalt mixture with alternative aggregates and crumb-rubber modified binder at reduced temperature

Lastra-González

Calzada-Pérez

Vega-Zamanillo

et al. 2017

Construction and Building Materials

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This paper studies the design and characterization of a PA mixture with 91% of EAF slag, using a commercial CRM binder. A fatty acid amide wax was added to decrease the mixture manufacturing temperature. The mechanical performance of the designed mixtures was studied with the determination of void characteristics, water sensitivity, and particle loss in dry and wet conditions. Finally, their compactability, stiffness and fatigue resistance were also analysed. The addition of the wax allowed to decrease the manufacturing temperature 15 °C. Besides, the wax increased the complex modulus of bitumen, increasing also the elastic component and decreasing the thermal susceptibility, although these modifications did not have a significant impact in the mechanical performance of the mixture.

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“…The incorporation of the wax increases the solid-like behaviour, as stated by other studies [14,24].…”

Section: = • •supporting

confidence: 77%

Section: = • •mentioning

confidence: 95%

Porous asphalt mixture with alternative aggregates and crumb-rubber modified binder at reduced temperature

Lastra-González

Calzada-Pérez

Vega-Zamanillo

et al. 2017

Construction and Building Materials

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“…The blending of CR with asphalt allows the absorption of the light components in asphalt to form a thick gel film around the CR particles . In particular, the solid CR particles form a strong elastic network in bitumen due to the contact of each particle with the ambient gel film . Therefore, the CRM bitumen has an outstanding rutting resistance at high temperatures, anticracking properties, and water damage resistance.…”

Section: Introductionmentioning

confidence: 99%

“…Despite the excellent performance of rubber asphalt, some disadvantages in its utilization have been reported. Most rubber is vulcanized for tire production, making it difficult for the rubber particles to dissolve and react with asphalt because after vulcanization, cured rubber forms a highly elastic three‐dimensional structure with a high heat resistance and high tensile strength that is insoluble in organic solvents . Moreover, due to the existence of solid CR particles, segregation from the asphalt occurs readily and leads to an insufficient storage stability for CRM bitumen .…”

Section: Introductionmentioning

confidence: 99%

Analysis of the performance and mechanism of desulfurized rubber and low‐density polyethylene compound‐modified asphalt

Liu

Zhou²,

Peng

et al. 2019

J of Applied Polymer Sci

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Desulfurized rubber (DR) and low-density polyethylene (LDPE) were used to modify bitumen. The basic physical properties, rheological properties, chemical composition, thermogravimetric behavior, and morphological characteristics were determined and evaluated to analyze the performance and mechanism of DR and LDPE compound-modified asphalt. A series of experiments (e.g., conventional test methods, rotational viscosity, storage stability, and dynamic shear rheometer tests), Fourier transform infrared spectroscopy, thermogravimetric analysis-differential scanning calorimetry, fluorescence microscopy, and atomic force microscopy were conducted. The results revealed that DR-modified asphalt (DRMA) had increases in the penetration, ductility, softening point, and penetration index by 30.2, 22.3, 3.5, and 11.1%, respectively, over the crumb rubber-modified asphalt (CRMA). The compatibility between the asphalt and modifier is better for DRMA than for CRMA. These findings indicate that DRMA has a better pavement performance than CRMA. Furthermore, compared with DR-modified bitumen, LDPE inclusions increased the value of G*/sin δ by at least 75.9% and improved the thermal properties. Morphological observations confirmed that the DR/LDPE additives were better dispersed than crumb rubber and formed a more homogeneous phase separation in the asphalt.

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“…A low-carbon economy has attracted more and more attention all over the world. Meanwhile, road engineers are paying attention to low-carbon materials, hoping to build green projects through low-carbon approaches [1][2][3]. Low-carbon engineering materials generally represent those engineering materials that can cut carbon dioxide emissions further.…”

Section: Introductionmentioning

confidence: 99%

Research on the Rheological Characteristics and Aging Resistance of Asphalt Modified with Tourmaline

Dong

Wang

et al. 2019

Materials

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Tourmaline modified asphalt (TMA) binders were prepared with different modifier types and contents in this research. The routine properties, rheological properties, and aging resistance were evaluated to research the function of tourmaline on the performances of asphalt binders. Test results show that the storage stability can be improved significantly by the smaller particle size and negative-ion treated surface of tourmaline modifier. It indicates that the stiffness and rutting-resistance of TMA binder can be enhanced significantly, and the elastic component of the viscoelastic characteristic can also be increased. Moreover, the complex viscosity and the Zero Shear Viscosity (ZSV) values of tourmaline modified asphalt are increased within the test frequency range, which results in the improvement of deformation resistance of tourmaline modified asphalt. When mixed with asphalt, the tourmaline modifier maintains a two-phase structure, which results in the good rheological property for tourmaline modified asphalt.Materials 2020, 13, 69 2 of 13 powder on the performance of asphalt binders were studied [22]. The influence of calcium carbide modifier on the performances of pavement was emphatically studied [23,24]. The effects of tourmaline on asphalt density, dynamic stability, and flow value were analyzed, and the micro-mechanism of tourmaline modified asphalt was also studied [25][26][27][28]. Organic tourmaline exhibits excellent storage stability due to its reduced surface polarity, which pioneer a new way for the development of mineral and copolymer composites [29]. Çelikbilek et al. evaluated the performances of Tourmaline modified asphalt (TMA) mixture by the means of Grey multi-criteria evaluation model. It was indicated that the model had good reliability and practicability in TMA mixture, which can provide a new theoretical basis for the widely application of TMA [30].The utilization of tourmaline in relative fields has become more and more popular. However, the comprehensive research on the properties of TMA and its mixture is still limited. The main work of this research is to study the properties of TMA under different modifier types and contents. The influences of tourmaline on storage stability, rheological characteristics, aging resistance, and microscope structure of TMA are all analyzed by various experiment methods.

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Complex shear modulus and phase angle of crumb rubber modified binders containing organic warm mix asphalt additives

Cited by 38 publications

References 20 publications

Porous asphalt mixture with alternative aggregates and crumb-rubber modified binder at reduced temperature

Porous asphalt mixture with alternative aggregates and crumb-rubber modified binder at reduced temperature

Analysis of the performance and mechanism of desulfurized rubber and low‐density polyethylene compound‐modified asphalt

Research on the Rheological Characteristics and Aging Resistance of Asphalt Modified with Tourmaline

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