Effect of fiber characteristic parameters on the high and low temperature rheological properties of basalt fiber modified asphalt mortar

Gu, Qianli; Kang, Aihong; Li, Bo; Ding, Hao

doi:10.1016/j.cscm.2022.e01247

Cited by 14 publications

(10 citation statements)

References 33 publications

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“…At the same fber content, the m-value of the modifed straw fber asphalt binder was 9.6% higher than that of the normal straw fber. Tis suggests that the modifed treatment can improve the relaxation ability of the binder [18].…”

Section: Low-temperature Rheological Property Figures 7 Andmentioning

confidence: 99%

Road Performance and Microscopic Mechanism Analysis of Modified Straw Fiber Asphalt Binder

Wang

et al. 2023

Advances in Materials Science and Engineering

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In this study, the correlation between the microstructure of straw fibers and the macroscopic properties of asphalt binders is investigated. Penetration, softening point, bending beam rheometer, and toughness tests are performed to investigate the relationship between the pavement properties of fiber asphalt binders and each of the fiber types and contents. Subsequently, a four-component test, SEM, Fourier transform infrared microscopy, and fluorescence microscope tests are performed to analyze the microstructure of the straw fiber and its effect on asphalt properties. The results show that the high-temperature performance and shear resistance of the asphalt binder were enhanced with an increase in the modified straw fiber content. The low-temperature performance and toughness of the asphalt binder were reduced because of excessive fiber, and the recommended fiber content is 1.5%–2.0%. The adsorption capacity of the modified straw fiber for the light components of asphalt increased by 5.4% on average, and the low-temperature creep capacity of asphalt decreased by 9.6%. The surface roughness of the straw fiber increased via modification, and the shear resistance, high-temperature deformation resistance, and stress relaxation ability of the asphalt increased by 23.1%, 6.5%, and 5.7%, respectively. The comprehensive properties of the asphalt binder with modified straw fiber are similar to those of lignin fiber.

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Section: Low-temperature Rheological Property Figures 7 Andmentioning

confidence: 99%

Road Performance and Microscopic Mechanism Analysis of Modified Straw Fiber Asphalt Binder

Wang

et al. 2023

Advances in Materials Science and Engineering

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“…Further, the softening point of PFAM is 77°C when the filler-asphalt ratio is 0.8, while the softening point of LFAM is 77.6°C at the filler-asphalt ratio of 1.0, which is close to that of PFAM at the filler-asphalt ratio of 0.8, but the mineral powder content is higher than that of LFAM. This is because the evenly dispersed polyester fibers in the PSAM form an obvious three-dimensional network structure with high toughness and possess a strong interfacial bonding force with the asphalt matrix due to the higher oil absorption characteristics [12]. This forms a stable three-dimensional system and enhances the toughness of PFAM, leading to an increase in the high-temperature thermal stability of PFAM.…”

Section: Impacts Of Filler-asphalt Ratio On the High-temperature Stab...mentioning

confidence: 99%

“…Some studies also validated that the ductility of modified asphalt was reduced as the fiber content was raised, which lowered the cracking resistance at low temperatures of the asphalt mixture, and asphalt pavement crack was not reduced at low temperatures [11]. Gu et al evaluated the effects of five fillerbinder ratios, four fiber types, five fiber contents and three fiber lengths on the rheological performance of asphalt mortar [12]. They reported that basalt fiber greatly enhanced the rheological properties of asphalt mortar at high temperatures, and strengthened stress dissipation.…”

Section: Introductionmentioning

confidence: 99%

Effects of Filler-Asphalt Ratio on the Properties of Lignin and Polyester Fiber Reinforced SMPU/SBS Modified Asphalt Mortar

Xia¹,

Wang²,

Xu³

et al. 2023

Journal of Renewable Materials

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To understand the effects of filler-asphalt ratio on different properties of lignin and polyester fiber reinforced shape memory polyurethane (SMPU)/styrene butadiene styrene (SBS) composite modified asphalt mortar (PSAM), as well as to reveal the reinforcing and toughening mechanisms of lignin and polyester fibers on PSAM, SMPU, SBS and mineral powder were first utilized to prepare PSAM. Then the conventional, rheological and anticracking properties of lignin fiber reinforced PSAM (LFAM) and polyester fiber reinforced PSAM (PFAM) at different filler-asphalt ratios were characterized. Test results indicate that the shear strength, deformation resistance and viscosity are increased after adding 0.8wt% lignin fiber or polyester fiber and increasing the filler-asphalt ratio from 0.8 to 1.2. The optimal filler-asphalt ratio of 1.0 is proposed after comprehensive performance assessments of PSAM. Polyester fiber shows a better reinforcing effect than lignin fiber, but its improvement in the thermal stability of PSAM is not significant at high temperatures. Additionally, the complex modulus, storage modulus, loss modulus and rutting resistance factor of PSAM are improved after adding lignin fiber and polyester fiber, as well as show an increasing trend as the filler-asphalt ratio is raised, but the phase angle is gradually decreased. Further, the increase of elastic components in PSAM effectively enhances the anti-deformation ability of PSAM at high temperatures, and polyester fiber more obviously improves the high-temperature deformation resistance of PSAM than lignin fiber. Finally, the anti-cracking performance of PFAM and LFAM at low temperatures is reduced by 74.2% and 46.7%, respectively, as the filler-asphalt ratio is raised from 0.8 to 1.2. The low-temperature anti-cracking performance of LFAM is lower than that of PFAM at the same filler-asphalt ratio, even lower than that of PSA. Compared with lignin fiber, the anti-cracking performance and deformation resistance of PSAM at low temperature is more greatly enhanced by polyester fiber.

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“…Rutting deforms the road surface and impairs the road's flatness, posing a serious threat to driving safety and comfort [2][3][4][5][6]. Many regions worldwide utilize anti-rutting agents and modified asphalt to improve the high-temperature rutting resistance of asphalt mixtures [7][8][9][10][11]. However, this method substantially raises production costs, and economically underdeveloped regions, such as the southern border area, cannot bear the additional expenses.…”

Section: Introductionmentioning

confidence: 99%

Study on UV aging characteristics of low-grade asphalt in the desert climate

Liu¹,

Hou

et al. 2023

Mater. Res. Express

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The Taklamakan Desert in China's Xinjiang region faces severe heat conditions that cause rutting in asphalt pavements. In order to combat this issue, local construction management has been advo-cating for the utilization of low-grade asphalt with penetration levels between 20 and 50, to en-hance the pavement's resistance to rutting. However, there is limited research on the durability of low-grade asphalt under intense UV irradiation in the region. To this end, a multiscale investigation was conducted, examining three different types of asphalt (30#, 50#, and 70#), under various con-ditions such as virgin, UV aging, and Pressure Aging Vessel aging. Analytical techniques such as Atomic Force Microscope, Gel Permeation Chromatography, Fourier Transform Infrared Spec-troscopy, Dynamic Shear Rheology, and Bending Beam Rheometer were employed. The results revealed that the surface roughness of the three types of asphalt increased by 15.50% (30#), 5.99% (50#), and 2.70% (70#) after UV aging, compared to the virgin samples. Furthermore, the adhesion properties of lower-grade asphalt were less affected by UV aging. Weight-average molecular weight of the three types of asphalt increased significantly after UV aging, with a 26.96% increase in 30#, 51.92% increase in 50#, and 43.76% increase in 70# compared to the samples prior to UV aging. The 30# asphalt with higher large molecule content exhibited slower UV aging. The 30# asphalt also exhibited the smallest increase of C=O and S=O after UV aging among the three types of asphalt. The study also found that UV aging had a lesser effect on the high- and low-temperature perfor-mance of asphalt, compared to PAV aging. Overall, the effects of UV irradiation on various properties of 30# asphalt were less pronounced than those of 50# and 70# asphalt. These findings offer valuable insights into aging resistance in the Taklamakan Desert, benefiting road contractors and the academic community.

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Effect of fiber characteristic parameters on the high and low temperature rheological properties of basalt fiber modified asphalt mortar

Cited by 14 publications

References 33 publications

Road Performance and Microscopic Mechanism Analysis of Modified Straw Fiber Asphalt Binder

Road Performance and Microscopic Mechanism Analysis of Modified Straw Fiber Asphalt Binder

Effects of Filler-Asphalt Ratio on the Properties of Lignin and Polyester Fiber Reinforced SMPU/SBS Modified Asphalt Mortar

Study on UV aging characteristics of low-grade asphalt in the desert climate

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