Temperature Sensitivity Characteristics of SBS/CRP-Modified Bitumen after Different Aging Processes

He, Rui; Wu, Shuhua; Wang, Zhenjun; Chen, Huaxin

doi:10.3390/ma11112136

Cited by 20 publications

(10 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, utilisation of stiffer binders often results in stiff mixes that have workability related issues since they are not easy to place and compact to the desired density. Furthermore, sometimes stiff binders are modified with polymers that further increase their viscosity hence substantially negatively impacting on workability at a given temperature [15,16]. Asphalt mixes with such stiff binders result in insufficient pavement compaction that often lead to significant performance-related defects resulting from high air voids.…”

Section: Binder Selectionmentioning

confidence: 99%

Effect of Inappropriate Binder Grade Selection on Initiation of Asphalt Pavement Cracking

Bangi

Kakoto²

2020

Sustainability

View full text Add to dashboard Cite

This paper is aimed at assessing in-service asphalt pavement cracking in order to fully understand its causes as well as reviewing the possible impact of implementing a new mix design method on failures observed. Field and laboratory investigations were conducted as well as a review of design and construction records. Substitution of a Performance Grade (PG) binder with straight run pen grade binder without performing independent Superpave PG verification tests greatly contributed to cracking. A 20/30 pen grade binder which was utilised had already undergone some change in its properties since its manufacture and therefore did not provide the required workability and crack resistance that it would otherwise have been expected to provide. Target mixing and compaction temperature ranges during construction were higher than those recommended confirming that the binder used had already undergone a change in its physical and chemical characteristics between the time of its manufacture and use. Additionally, a lapse in quality control and assurance during asphalt production and laying resulted in a highly voided wearing course which exacerbated the situation.

show abstract

Section: Binder Selectionmentioning

confidence: 99%

Effect of Inappropriate Binder Grade Selection on Initiation of Asphalt Pavement Cracking

Bangi

Kakoto²

2020

Sustainability

View full text Add to dashboard Cite

show abstract

“…He and authors conducted research on SBS/rubber powder-modified asphalt, and the results showed that the flexibility and structure of the SBS/rubber powder composite-modified asphalt after UV aging were not greatly affected. Dynamic shear rheometer (DSR) and bending beam rheometer (BBR) tests showed that the compositemodified asphalt still had excellent temperature sensitivity and low-temperature crack resistance after aging, and the modification of asphalt by SBS and rubber powder was mainly physical modification [13]. Mo and authors performed DSR tests, rutting tests and three-point bending tests and demonstrated that SBS/rubber powder compositemodified asphalt had good performance in both high-and low-temperature environments, and the addition of composite-modified materials improved the rutting resistance and low-temperature crack resistance of asphalt mixtures [14].…”

Section: Introductionmentioning

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

View full text Add to dashboard Cite

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.

show abstract

“…C. Loderer et al [29] found that the addition of crumb-rubber to bitumen increases the complex modulus at high temperatures and reduces stiffness at low temperatures. He et al [30] investigated the temperature sensitivity characteristics of bitumen after different aging processes and showed that SBS/CRP(crumb rubber powder)-modified bitumen has a strong anti-aging ability in that its flexibility and structure remain in good condition after long-term aging.…”

Section: Introductionmentioning

confidence: 99%

Mechanical Performance of Warm-Mixed Porous Asphalt Mixture with Steel Slag and Crumb-Rubber–SBS Modified Bitumen for Seasonal Frozen Regions

et al. 2019

View full text Add to dashboard Cite

In this paper, the performance of a warm-mixed porous asphalt mixture (PAM) with steel slag as aggregate and crumb-rubber–SBS (styrene-butadiene-styrene) modified bitumen as a binder was studied. Two kinds of warming additives were used, namely ethylene bis stearic acid amide (EBS) and stearic acid amide (SA). The mixtures were investigated for their permeability, Marshall stability, low-temperature crack resistance, and underwent a rutting test, water sensitivity evaluation and Cantabro particle loss test. Then, the viscoelastic and dynamic characteristics of the mixtures were also analyzed. The results showed that the addition of the warming additives allowed the decrease of the manufacturing temperature by 10 °C. Thus, the addition of warming additives significantly improves the low-temperature crack resistance and slightly reduces the water sensitivity, weakly increases the permeability, and has little effect on the resilient modulus. Since the addition of SA significantly improves the low-temperature crack resistance and rutting resistance of the PAM, SA is therefore recommended for pavement engineering in seasonal frozen regions.

show abstract

Temperature Sensitivity Characteristics of SBS/CRP-Modified Bitumen after Different Aging Processes

Cited by 20 publications

References 18 publications

Effect of Inappropriate Binder Grade Selection on Initiation of Asphalt Pavement Cracking

Effect of Inappropriate Binder Grade Selection on Initiation of Asphalt Pavement Cracking

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

Mechanical Performance of Warm-Mixed Porous Asphalt Mixture with Steel Slag and Crumb-Rubber–SBS Modified Bitumen for Seasonal Frozen Regions

Contact Info

Product

Resources

About