Effect of a lignin-based polyurethane on adhesion properties of asphalt binder during UV aging process

Peng, Chao; Huang, Shifan; You, Zhanping; Xu, Fang; Ouyang, Hui; Li, Tianjun; Guo, Chong; Ma, Hongchao; Chen, Pengxu; Dai, Jing

doi:10.1016/j.conbuildmat.2020.118547

Cited by 56 publications

(10 citation statements)

References 33 publications

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“…Among other studies, Pasandín et al [ 55 ] analysed binder–aggregate adhesion and obtained satisfying results for biopolymer addition in the form of waste cork. Peng et al [ 56 ] investigated adhesion with the addition of lignin-based polyurethane, and it was found that the application of this biopolymer also increased the adhesion properties of the binder–aggregate system measured by FTIR, pull-off experiments and contact angle measurements.…”

Section: Resultsmentioning

confidence: 99%

Use of New Green Bitumen Modifier for Asphalt Mixtures Recycling

et al. 2022

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Nowadays, an increasing amount of reclaimed asphalt pavement (RAP) is being produced from the reconstruction and/or modernisation of asphalt pavements. It is necessary to recycle the obtained RAP according to principles of sustainable development. Therefore, this work includes the design of asphalt mixtures containing RAP with bio-derived modifier and evaluates their performance properties. Crosslinked sodium alginate was applied for bitumen modification. The studies were carried out for four different modifier contents, i.e., 1.0%, 2.5%, 4.0% and 5.5%, with and without crosslinking agent. On the basis of the binder test results, the optimal amount of the additive was found to be 2.5%. The nanostructure analysis for the base and modified binders indicated a dual crosslinked biopolymer effect. As a result of the bee structure size decrease, the binder softening effect was observed. The asphalt mix properties showed that application of biopolymer-modified binder is fully justified due to the functional parameters of the mixture, especially the increased resistance to water and frost by about 9%.

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Section: Resultsmentioning

confidence: 99%

Use of New Green Bitumen Modifier for Asphalt Mixtures Recycling

et al. 2022

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“…In addition, lignin derivatives can also be used as asphalt modifiers. In one study, lignin-based polyurethane (Peng et al, 2020) was prepared with lignin and toluene diisocyanate and was added to the matrix asphalt binder. The lignin-based polyurethane modified asphalt binder was tested, and the bonding performance of the asphalt binder was evaluated.…”

Section: Lignin As An Asphalt Modifiermentioning

confidence: 99%

Review on Applications of Lignin in Pavement Engineering: A Recent Survey

et al. 2022

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Lignin is the second-largest plant polymer on Earth after cellulose. About 98% of lignin produced in the papermaking and pulping industry is used for combustion heating or power generation. Less than 2% of lignin is used in more valuable fields, mainly in the formulation of dispersants, adhesives, and surfactants. Asphalt is one of the most important materials in pavement engineering. It is a dark brown complex mixture composed of hydrocarbons with different molecular weights and their non-metallic derivatives. Because the chemical structure of lignin is similar to that of asphalt, it is a carbon-based hydrocarbon material. More researchers studied the application of lignin in pavement engineering. In this paper, the structure, application, and extraction technology of lignin were summarized. This is a review article describing the different applications of lignin in pavement engineering and exploring the prospects of the application. There are three main types of pavement materials that can be used for lignin in pavement engineering, which are asphalt, asphalt mixture, and roadbed soil. In asphalt, lignin can be used as a modifier, extender, emulsifier, antioxidant, and coupling agent. In asphalt mixtures, lignin can be used as an additive. In road base soils, lignin can be used as a soil stabilizer. Furthermore, the article analyzed the application effects of lignin from the life cycle assessment. The conclusions suggest that lignin-modified asphalt exhibits more viscosity and hardness, and its high-temperature resistance and rutting resistance can be significantly improved compared with conventional asphalt. In addition, some lignin-modified asphalt binders exhibit reduced low-temperature crack resistance and fatigue resistance, which can be adjusted and selected according to the climate change in different regions. The performance of lignin as an asphalt mixture additive and asphalt extender has been proved to be feasible. Lignin can also produce good mechanical properties as well as environmental benefits as a soil stabilizer. In summary, lignin plays an important role in asphalt pavement and roadbed soil, and it is likely to be a development trend in the future due to its environmental friendliness and low cost. More research is needed to generalize the application of lignin in pavement engineering.

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“…The soft segment provides PU with the properties of elasticity, viscosity, and toughness, whereas the hard segment makes PU hard and strong. [25,26] The raw materials and synthesis processes used directly affect the degree of microphase separation of PU, thereby affecting its mechanical properties.…”

Section: Establishment Of Pu Molecular Modelmentioning

confidence: 99%

Mechanical performance analysis of polyurethane‐modified asphalt using molecular dynamics method

Huang

Shen

et al. 2021

Polymer Engineering & Sci

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In this study, the mechanical performance of polyurethane (PU)‐modified asphalt was investigated. To this end, the molecular dynamics method was adopted to study the influence of the PU modifier on the compatibility, mechanical properties, and structure of asphalt. Using the Materials Studio software, a four‐component molecular model of asphalt, a PU molecular model, and an asphalt–PU mixed system model were constructed, and the molecular density and glass transition temperature (Tg) were used to verify the performance of the aforementioned models. Molecular dynamics simulations of the three molecular models were conducted under different temperatures, and the solubility parameter (δ), interaction energy, mechanical properties, and radial distribution functions (RDFs) were obtained. The results showed that at 413.15 K (140°C), the difference between the solubility parameters of the asphalt and PU molecules (∆δ) is the smallest, and their interaction reaches the most optimal phase state. The effects of the PU modifier on the Young's modulus, bulk modulus, and shear modulus of asphalt were studied. Finally, the RDF analysis showed that the PU modifier has a direct effect on the degree of swelling and dispersion between the aromatic–aromatic and saturate–saturate components in the asphalt, reducing the aggregation of both molecules. This verifies the PU modification effect.

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Effect of a lignin-based polyurethane on adhesion properties of asphalt binder during UV aging process

Cited by 56 publications

References 33 publications

Use of New Green Bitumen Modifier for Asphalt Mixtures Recycling

Use of New Green Bitumen Modifier for Asphalt Mixtures Recycling

Review on Applications of Lignin in Pavement Engineering: A Recent Survey

Mechanical performance analysis of polyurethane‐modified asphalt using molecular dynamics method

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