Performance evaluation of surface-organic grafting on the palygorskite nanofiber for the modification of asphalt

Jin, Jiao; Gao, Yuchao; Wu, Yan; Li, Rui; Liu, Ruohua; Wei, Hui; Qian, Guoping; Zheng, Jianlong

doi:10.1016/j.conbuildmat.2020.121072

Cited by 36 publications

(12 citation statements)

References 41 publications

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“…Based on our previous research [ 19 , 21 ], Pal was treated with 1 mol/L HCl solution at 60 °C for 1 h to remove some large particles and cationics outside the raw material, then washed to neutral and dried. The treated Pal and γ-aminopropyltriethoxysilane (APTES) were dispersed in xylene solution, and the condensation reflux method was used for magnetic stirring for 10 h, then washed several times with the filtrate, dried and crushed to obtain A-Pal to enhance compatibility with the asphalt matrix.…”

Section: Materials Preparation and Test Methodsmentioning

confidence: 99%

Synergy Effect of Nano-Organic Palygorskite on the Properties of Star-Shaped SBS-Modified Asphalt

et al. 2021

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With the rapid development of economic construction, styrene-butadiene-styrene (SBS)-modified asphalt is being more and more widely used in highway engineering, but there are still many deficiencies in the process of its use. In order to further improve its performance for use, nano-organic palygorskite (A-Pal) and star-shaped SBS were compounded to obtain modified asphalt in this study. The high-temperature stability of SBS-modified asphalt was enhanced after incorporation with A-Pal for the high-temperature stability test by a dynamic shear rheometer. The A-Pal should improve the surface free energy and adhesion of SBS-modified asphalt by the water stability test analysis. The aging test shows that A-Pal can reduce the thermal oxygen decomposition of SBS and improve the anti-aging performance and the fatigue resistance of SBS-modified asphalt. A-Pal has a certain improvement effect on the low temperature performance of SBS-modified asphalt as shown by a low temperature crack resistance test. A-Pal-compounded SBS-modified asphalt features good storage stability in normal temperatures with the lowest critical compatibility temperature.

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Section: Materials Preparation and Test Methodsmentioning

confidence: 99%

Synergy Effect of Nano-Organic Palygorskite on the Properties of Star-Shaped SBS-Modified Asphalt

et al. 2021

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“…Roughness. According to the roughness coefficient JRC 2D of 9 contours of the aggregate surface, the 3D average roughness JRC of the analysis area of the aggregate surface was calculated to be 14.6 via equation (6). e texture feature of the analysis area was then evaluated by the 3D contour surface roughness JRC 3D .…”

Section: (3) Evaluation Accuracy Of 3d Contour Surfacementioning

confidence: 99%

“…Rock aggregates are commonly used raw materials in the field of road engineering, and their surface roughness significantly affects the performance of asphalt mixtures [1]. e rough surface is beneficial to increasing the contact area between the aggregate and asphalt, thereby creating a certain penetration depth of the asphalt, increasing the thickness of the asphalt film, and enhancing the physical adsorption of the two materials on the contact surface [2][3][4][5][6]. Additionally, there are many fine protrusions on the surfaces of aggregates, which is conducive to the formation of the aggregate skeleton structure of the asphalt mixture during the mixing process, thereby endowing asphalt concrete with good shear strength and ultimately improving the rutting resistance of the road surface [7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Study on the Accurate Measurement and Quantitative Evaluation Methods of Aggregate Surface Roughness

Guo

Zeng

2021

Advances in Materials Science and Engineering

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In this work, to quantitatively analyze the roughness of the surfaces of road aggregates, the contact measurement technique and contactless scanning technique were, respectively, used to capture the coordinate data of point clouds on the aggregate surface, which were then used to reconstruct the digital elevation models of aggregate particles. Then, the joint roughness coefficient (JRC) was used as an evaluation index, and the quantitative calculation methods of the two-dimensional (2D) contour line roughness and three-dimensional (3D) contour surface roughness of aggregate particles were, respectively, studied. Finally, the anisotropic characteristics and size effect of the roughness coefficients of aggregates with different lithologies were, respectively, investigated, based on which the practicability of the 3D roughness coefficient index was proven. The results demonstrate that the roughness of a road aggregate surface can be quantitatively described by the point cloud data. The 2D roughness of aggregate profile lines exhibits anisotropy, while the 3D roughness of the aggregate contour surface indicates the size effect. The subtle morphological changes of the surface textures of aggregates can be accurately described by the 3D joint roughness coefficient (JRC3D) calculated by the feature parameter method.

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“…The incorporation of lignin modifier results in the absorption of bitumen liquid phase into the bitumen-lignin interacting area during the mixing process, which forms the bitumen-lignin working system and changing the viscoelastic behavior of bitumen binders. Conventional bitumen modifiers include styrene-butadiene-styrene (SBS polymer [ 5 , 6 ], crumb rubber [ 7 , 8 ], bio oil [ 9 ], plastics [ 10 ] and various fibers [ 11 , 12 ]. The main components of raw bitumen are statures, aromatics, resins and asphaltenes, which have compatibility with the above-mentioned modifiers.…”

Section: Introductionmentioning

confidence: 99%

Effect of Lignin Modifier on Engineering Performance of Bituminous Binder and Mixture

Wang

Guo

et al. 2021

Polymers

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Lignin accounts for approximately 30% of the weight of herbaceous biomass. Utilizing lignin in asphalt pavement industry could enhance the performance of pavement while balancing the construction cost. This study aims to evaluate the feasibility of utilizing lignin as a bitumen performance improver. For this purpose, lignin derived from aspen wood chips (labeled as KL) and corn stalk residues (labeled as CL) were selected to prepare the lignin modified bituminous binder. The properties of the lignin modified binder were investigated through rheological, mechanical and chemical tests. The multiple stress creep recovery (MSCR) test results indicated that adding lignin decreased the Jnr of based binder by a range of 8% to 23% depending on the stress and lignin type. Lignin showed a positive effect on the low temperature performance of asphalt binder, because at −18 °C, KL and CL were able to reduce the stiffness of base binder from 441 MPa to 369 MPa and 378 MPa, respectively. However, lignin was found to deteriorate the fatigue life and workability of base binder up to 30% and 126%. With bituminous mixture, application of lignin modifiers improved the Marshall Stability and moisture resistance of base mixture up to 21% and 13%, respectively. Although, adding lignin modifiers decreased the molecular weight of asphalt binder according to the gel permeation chromatography (GPC) test results. The Fourier-transform infrared spectroscopy (FTIR) test results did not report detectable changes in functional group of based binder.

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Performance evaluation of surface-organic grafting on the palygorskite nanofiber for the modification of asphalt

Cited by 36 publications

References 41 publications

Synergy Effect of Nano-Organic Palygorskite on the Properties of Star-Shaped SBS-Modified Asphalt

Synergy Effect of Nano-Organic Palygorskite on the Properties of Star-Shaped SBS-Modified Asphalt

Study on the Accurate Measurement and Quantitative Evaluation Methods of Aggregate Surface Roughness

Effect of Lignin Modifier on Engineering Performance of Bituminous Binder and Mixture

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