Physical and UV Aging Resistance Properties of Asphalts Modified by UV Absorbent Composited and Intercalated Layered Double Hydroxides

2016 ◽  
Vol 16 (12) ◽  
pp. 12714-12719 ◽  
Author(s):  
Meiling Zhao ◽  
Song Xu ◽  
Zhijie Zhao ◽  
Jianying Yu ◽  
Shaopeng Wu
Keyword(s):  
Layered Double Hydroxides ◽  
Uv Aging ◽  
Aging Resistance ◽  
Double Hydroxides

Effect of Layered Double Hydroxides with Different Particle Size on Properties of Bitumen

2018 ◽  
Vol 913 ◽  
pp. 1062-1069
Author(s):  
Min Wu ◽  
Lian Li ◽  
Bian Yang He ◽  
Jian Ying Yu
Keyword(s):  
Particle Size ◽  
Physical Properties ◽  
Rheological Properties ◽  
Layered Double Hydroxides ◽  
Particle Size Analysis ◽  
Size Analysis ◽  
Uv Aging ◽  
Aging Resistance ◽  
Microscopic Morphology ◽  
Double Hydroxides

The crystal structure, microscopic morphology, particle size distribution and UV shielding properties of layered double hydroxides (LDHs) with different particle size were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), laser particle size analysis and ultraviolet and visible (UV-vis) spectrophotometer. The effects of LDHs with different particle size on the physical, rheological properties and UV aging resistance of bitumen were investigated by conventional physical properties and dynamic rheological characteristics. The results indicated that the particle size of LDHs had a little effect on the physical properties, and it had some influence on rheological properties of bitumen, but its influence on the UV aging resistance of bitumen was different significantly. When UV aging time was 9d, the viscosity aging indexes of bitumen modified by LDHs with different particle size (80nm, 115nm and 180nm) decreased by 48.2%, 58.1% and 63.8% compared with the pristine bitumen, respectively. LDHs with the particle size of 180 nm showed better improvement than other two kinds of LDHs on UV aging resistance of bitumen.

Effect of 4,4′-stilbenedicarboxylic acid-intercalated layered double hydroxides on UV aging resistance of bitumen

RSC Advances ◽  
2015 ◽  
Vol 5 (116) ◽  
pp. 95504-95511 ◽  
Author(s):  
Chao Peng ◽  
Guosheng Jiang ◽  
Chunhua Lu ◽  
Fang Xu ◽  
Jianying Yu ◽  
...  
Keyword(s):  
Layered Double Hydroxides ◽  
Uv Aging ◽  
Aging Resistance ◽  
Double Hydroxides

UV aging is the main cause of the deterioration of bitumen pavement.

Evaluation of ultraviolet aging resistance of bitumen containing different organic layered double hydroxides

2018 ◽  
Vol 192 ◽  
pp. 696-703 ◽  
Author(s):  
Song Xu ◽  
Lin Dang ◽  
Jianying Yu ◽  
Lihui Xue ◽  
Changbin Hu ◽  
...  
Keyword(s):  
Layered Double Hydroxides ◽  
Aging Resistance ◽  
Double Hydroxides ◽  
Ultraviolet Aging

Effect of De-Icing Additives on Aging Properties of Bitumen

2016 ◽  
Vol 847 ◽  
pp. 418-424
Author(s):  
Wei Wang ◽  
Jian Ying Yu ◽  
Yi Yi ◽  
Xiao Chen
Keyword(s):  
Thin Film ◽  
Layered Double Hydroxides ◽  
Softening Point ◽  
Experimental Result ◽  
Uv Aging ◽  
Oven Test ◽  
Aging Properties ◽  
Radiation Test ◽  
Double Hydroxides ◽  
Ultraviolet Aging

Effect of three de-icing additives: NaCl, wrapped NaCl (W-NaCl) and Layered double hydroxides (LDHs) on thermo-oxidative and ultraviolet aging properties of bitumen were investigated by thin film oven test (TFOT), pressure aging vessel (PAV) and ultraviolet (UV) radiation test. The experimental result illustrated that compared with bitumen with MF, the softening point and viscosity of bitumen with NaCl and W-NaCl increased and the ductility decreased distinctly after TFOT, PAV and UV aging, indicating that NaCl and W-NaCl accelerated the aging of bitumen. However, for bitumen with LDHs, the softening point and viscosity decreased significantly, the ductility increased after aging, which demonstrated that the anti-aging properties of bitumen were improved effectively by LDHs.

UV Aging Performance of Asphalt Containing LDHs

2014 ◽  
Vol 599 ◽  
pp. 265-270 ◽  
Author(s):  
Pan Fei Liu ◽  
Jun Zheng ◽  
Shao Peng Wu
Keyword(s):  
Aging Process ◽  
Complex Modulus ◽  
Short Term ◽  
Uv Aging ◽  
Oven Test ◽  
Aging Properties ◽  
Aging Resistance ◽  
Before And After ◽  
Double Hydroxides

In this paper the effect of Layered double hydroxides (LDHs) on aging properties of asphalts was studied. The thin film oven test TFOT tests and ultraviolet (UV) aging process were used to simulate short-term and long-term aging of asphalts, respectively. After aging, the physical properties and dynamic shear rheological behaviors of LDHs modified asphalts were investigated. The viscosity of LDHs modified asphalts was measured by Brookfield viscometer before and after UV aging. After UV aging, with an increase of LDHs, softening point and viscosity value of modified asphalts decreased, while both of ductility and penetration increased, compared to base asphalts. Temperature sweep tests showed that the complex modulus of LDHs modified asphalts was lower than that of base asphalt, while phase angle was higher. The results showed that LDHs improved the UV aging resistance of the asphalt, and it could prevent asphalt from UV aging.

Effect of Silane Coupling Agent Surface Modified Layered Double Hydroxides on Properties of Bitumen

2016 ◽  
Vol 847 ◽  
pp. 425-430
Author(s):  
Can Lin Zhang ◽  
Jian Ying Yu ◽  
Yu Bin Sun ◽  
Kai Feng
Keyword(s):  
Layered Double Hydroxides ◽  
Coupling Agent ◽  
Softening Point ◽  
Silane Coupling Agent ◽  
Retention Rate ◽  
Uv Aging ◽  
Physical Test ◽  
Silane Coupling ◽  
Surface Modified ◽  
Double Hydroxides

Layered double hydroxides (LDHs) surface modified by silane coupling agent KH550 were prepared to modify bitumen, the surface modified LDHs (KH550-LDHs) were characterized by Fourier transform infrared (FTIR) spectroscopy, X-ray diffraction (XRD). The effect of KH550-LDHs and LDHs on physical and anti-ageing properties of bitumen was evaluated by means of physical test. The results of FTIR showed that KH550 had successfully grafts onto the surface of LDHs, and XRD result showed that KH550 had little effect on the crystal structure of LDHs. The storage stability test showed that KH550-LDHs dispersed better homogeneously and existed more stable than LDHs in bitumen. The physical properties tests indicated that high and low temperature properties of bitumen were improved compared with LDHs. After UV aging with the addition of KH550-LDHs, the increase rate of softening point slowed remarkably, the reduction rate of ductility declined evidently compared with LDHs. Aging indices (softening point increment and ductility retention rate) show that KH550-LDHs exhibited better improvement than LDHs in UV aging resistance of bitumen, implying more effective modification of KH550-LDHs which is due to the enhanced compatibility between KH550-LDHs and bitumen.

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