Open Access
ARTICLE
Effects of Filler-Asphalt Ratio on the Properties of Lignin and Polyester Fiber Reinforced SMPU/SBS Modified Asphalt Mortar
Wenjing Xia1,*, JinHui Wang1, Tao Xu1, Nan Jiang2
1
College of Civil Engineering, Nanjing Forestry University, Nanjing, 210037, China
2
College of Civil Engineering, Yancheng Institute of Technology, Yancheng, 224051, China
* Corresponding Author: Wenjing Xia. Email:
(This article belongs to this Special Issue: Environmentally Friendly and Renewable Civil Engineer Materials)
Journal of Renewable Materials 2023, 11(8), 3387-3402. https://doi.org/10.32604/jrm.2023.026971
Received 07 October 2022; Accepted 05 December 2022; Issue published 26 June 2023
Abstract
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.
Graphical Abstract
Keywords
Cite This Article
Xia, W., Wang, J., Xu, T., Jiang, N. (2023). Effects of Filler-Asphalt Ratio on the Properties of Lignin and Polyester Fiber Reinforced SMPU/SBS Modified Asphalt Mortar.
Journal of Renewable Materials, 11(8), 3387–3402.