Preparation and Performance Analysis of High‐Viscosity and Elastic Recovery Modified Asphalt Binder

Qu, Liangchen; Gao, Yingli; Yao, Hui; Cao, Duanlin; Pei, Ganpeng; He, Bei Hai; Duan, Kairui; Zhou, Wenjuan

doi:10.1155/2019/6070685

Cited by 5 publications

(3 citation statements)

References 39 publications

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“…e higher its value, the better the high-temperature performance, deformation resistance, and cohesiveness of asphalt binders [9]. However, with the increase of dynamic viscosity at 60°C, the viscosity of HVA at 135°C is also higher than that of the ordinary modified asphalt binder [14]. ere is no doubt that this problem will increase the difficulty of construction, thus making asphalt mixtures harder to be produced and compacted for construction [15].…”

Section: Introductionmentioning

confidence: 99%

Effects of Surfactant Warm‐Mix Additives on the Rheological Properties of High‐Viscosity Asphalt

Jian

Fan

Lin

et al. 2020

Advances in Materials Science and Engineering

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In order to evaluate the possibility of the application of warm mixing technology in high-viscosity asphalt mixture, in this paper, the effects of surfactant warm-mix additives (WMAs) on physical and rheological properties of high-viscosity asphalt (HVA) which was prepared with self-developed SBS/C9 petroleum resin blends (SPR) modifier were measured. The results indicate that the addition of WMA can decrease the viscosity and softening point but improve the penetration and ductility of warm-mix HVA. With the increase of the content of WMA, the modulus, failure temperature, viscosity, and recovery rate of warm-mix HVA all increased at first and then decreased, and the maximum value appeared when the modifier content was 1.0%–1.5%. Moreover, when the amount of WMA is 1.5%, the low-temperature performance of warm-mix HVA reaches the best value. Thus, the amount of WMA is of great importance for the warm-mix HVA, and in order to achieve ideal rheological properties, the recommended amount of WMA is 1.0%–1.5%. Considering economic improvement and environmental protection, WMA could be an alternative for increasing the workability of HVA.

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Section: Introductionmentioning

confidence: 99%

Effects of Surfactant Warm‐Mix Additives on the Rheological Properties of High‐Viscosity Asphalt

Jian

Fan

Lin

et al. 2020

Advances in Materials Science and Engineering

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“…Zhang et al [10] added SBS, a plasticizer, and a cross-linking agent to an asphalt to prepare HVMA and studied the effects of the modifiers on the structure and rheological behavior of the SBS-modified asphalt through asphalt rheological test. Qu et al [13] prepared HVMA with modifiers such as SBS, rock pitch, and rubber powder; carried out a rotational viscosity test, DSR test, and BBR test; and found that the addition of modifiers can improve the high-and low-temperature properties of the asphalt and its mixture. Shi et al [14] used SBS/c9 petroleum resin blends (SPR) as a highviscosity asphalt modifier and compared it with the traditional modifier TPS; the results showed that the SPR modifier had good compatibility with asphalts in the production process, making SPR easier to disperse in asphalts with average particle size.…”

Section: Introductionmentioning

confidence: 99%

Investigating the Rheological Properties of Styrene-Butadiene-Styrene-Based High-Viscosity Modified Asphalt Using Carbon Nanotubes

Chen¹,

Huang

Wang

et al. 2022

Sustainability

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Styrene-butadiene-styrene (SBS) is currently the most widely used asphalt modifier. However, high-SBS-concentration high-viscosity modified asphalts (HVMA) are characterized by poor flow and storage instability. To make up for the lack of performance of traditional SBS-HVMA, a nano-based high-viscosity composite modified asphalt with excellent performance was developed. Since carbon nanotubes (CNTs) are nanomaterials, they are prone to agglomeration when added to the modified asphalt, and the dispersion effect is poor, which affects the modifier’s contribution rate. To better disperse CNTs in the modified asphalt, the nanomaterials were modified, and two new CNT additives were prepared by combining two polymers with CNTs. The appropriate ratio of these two new additives was selected to be further combined with SBS to obtain CNTs/SBS-HVMA. The flow characteristics and anti-aging properties of the three kinds of bitumen in different temperature ranges were studied by taking the common SBS-HVMA and Tafpack super (TPS) high-viscosity modified asphalts (TPS/SBS-HVMA) as comparison samples and by evaluating the road performance of a stone mastic asphalt (SMA-13) mixture. The storage stability, workable performance, rheological characteristics, and aging resistance of three high-viscosity asphalts were analyzed through a segregation test, dynamic viscosity analysis, Brookfield viscosity measurements, bending beam rheometer (BBR) tests, dynamic shear rheometer (DSR), and multiple stress creep recovery (MSCR) before and after short-term aging. The experimental results showed that CNT/SBS-HVMA exhibited good storage stability and workability. DSR measurements and other rheological tests revealed that TPS/SBS-HVMA had higher low-temperature flexibility than the other modified asphalts, while CNT/SBS-HVMA exhibited good high-temperature resistance, aging resistance, and deformation resistance. Through the verification of asphalt mixture performance, it was found that the high-temperature rutting resistance of CNTs/SBS-HVMA prepared by new CNT additives was 7% and 28% higher than those of SBS-HVMA and TPS/SBS-HVMA, respectively, but the low-temperature performance of CNT/SBS-HVMA was 5% lower than that of SBS-HVMA. This showed that CNT/SBS addition improved the high-temperature performance of the asphalt without a significant negative impact on the low-temperature performance of the asphalt.

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“…Asphalt 4.5.1. Micromorphology.e macroscopic properties of asphalt are closely related to its microstructure[31].e Complex shear modulus versus strain. Phase angle versus strain.…”

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confidence: 99%

Research on the Influence of Nanocarbon/Copolymer SBS/Rubber Powder Composite Modification on the Properties of Asphalt and Mixtures

Zhao

Xie

et al. 2020

Advances in Materials Science and Engineering

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To expand the application range of modified asphalt and mixtures and effectively reduce the aggregation of nanomaterials in asphalt, nanocarbon/styrene butadiene styrene (SBS)/rubber powder composite-modified asphalt is proposed. This paper presents a laboratory study on the performance of nanocarbon/copolymer SBS/rubber powder composite-modified asphalt, and nanocarbon particles modified by titanate coupling agents as modifiers are selected. The nanocarbon/copolymer SBS/rubber powder composite-modified asphalt was prepared by a high-speed shearing method. The physical properties and rheological performance were assessed using ductility tests, softening point tests, penetration tests, dynamic shear rheometer (DSR) tests, and bending beam rheometer (BBR) tests. Furthermore, the mixture properties, including the high-temperature stability, low-temperature cracking resistance, moisture stability, and freeze-thaw splitting, were evaluated in the laboratory. The micromorphology of the base asphalt and composite-modified asphalt was examined by scanning electron microscopy (SEM), and the reactions between the modifiers and AH-70 base asphalt were studied by Fourier transform infrared spectroscopy (FTIR). The results reveal that the surface-modified nanocarbon and rubber powder additives substantially increased the softening point and penetration index of the base asphalt, with little obvious influence on the low-temperature performance. In addition, when nanocarbon/copolymer SBS/rubber powder composite-modified asphalt was used, the high-temperature stability and low-temperature cracking resistance of the nanocarbon/copolymer SBS/rubber powder composite-modified asphalt mixture were approximately 1.3 times those of the nanocarbon/rubber powder asphalt mixture. In terms of the micromorphology and reaction, the addition of the nanocarbon can increase the compatibility between the base asphalt and rubber powder, and then the addition of copolymer SBS can improve the structure of nanocarbon (after surface modification)/rubber powder-modified asphalt to form a stable network. Moreover, the physical reaction plays the dominant role in the modification process for the rubber powder and base asphalt, and chemical reactions occur in the modification process for the surface-modified nanocarbon and base asphalt.

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Preparation and Performance Analysis of High‐Viscosity and Elastic Recovery Modified Asphalt Binder

Cited by 5 publications

References 39 publications

Effects of Surfactant Warm‐Mix Additives on the Rheological Properties of High‐Viscosity Asphalt

Effects of Surfactant Warm‐Mix Additives on the Rheological Properties of High‐Viscosity Asphalt

Investigating the Rheological Properties of Styrene-Butadiene-Styrene-Based High-Viscosity Modified Asphalt Using Carbon Nanotubes

Research on the Influence of Nanocarbon/Copolymer SBS/Rubber Powder Composite Modification on the Properties of Asphalt and Mixtures

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