Influence of UV aging on the rheological properties of bitumen modified with surface organic layered double hydroxides

2016 ◽  
Vol 123 ◽  
pp. 574-580 ◽  
Author(s):  
Canlin Zhang ◽  
Jianying Yu ◽  
Song Xu ◽  
Lihui Xue ◽  
Zhilong Cao
Keyword(s):  
Rheological Properties ◽  
Layered Double Hydroxides ◽  
Uv Aging ◽  
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 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.

scholarly journals Rheological properties of low-density polyethylene filled with hydrophobic Co(Ni)-Al layered double hydroxides

Polímeros ◽  
2019 ◽  
Vol 29 (1) ◽  
Author(s):  
Silvia Jaerger ◽  
Andreas Leuteritz ◽  
Rilton Alves de Freitas ◽  
Fernando Wypych
Keyword(s):  
Rheological Properties ◽  
Layered Double Hydroxides ◽  
Low Density Polyethylene ◽  
Low Density ◽  
Double Hydroxides

scholarly journals SBS Modified Bitumen with Organic Layered Double Hydroxides: Compatibility and Aging Effects on Rheological Properties

Materials ◽  
2021 ◽  
Vol 14 (15) ◽  
pp. 4201
Author(s):  
Canlin Zhang ◽  
Hongjun Dong ◽  
Zhengli Yan ◽  
Meng Yu ◽  
Ting Wang ◽  
...  
Keyword(s):  
High Temperature ◽  
Rheological Properties ◽  
Layered Double Hydroxides ◽  
Storage Stability ◽  
Service Performance ◽  
Aging Effects ◽  
Modified Bitumen ◽  
High Temperature Properties ◽  
Double Hydroxides ◽  
And Storage

SBS-modified bitumen (SMB) is susceptible to aging, which seriously influences its service performance and life. In order to strengthen the anti-aging ability of SMB, triethoxyvinylsilane was designed to organically modify layered double hydroxides (LDHs) and was applied to modify SMB. The dispersibility and storage stability of LDHs in SMB were markedly enhanced after triethoxyvinylsilane organic modification, and the compatibility and storage stability of SBS in bitumen were simultaneously enhanced. Compared with SMB, the introduction of LDHs and organic LDHs (OLDHs) could ameliorate the high-temperature properties of SMB, and the thermostability of SBS in bitumen at a high temperature was also distinctly improved, especially OLDHs. After aging, due to the oxidation of molecular bitumen and the degradation of molecular SBS, SMB became hardened and brittle, and the rheological properties were significantly deteriorated, which had serious impacts on the performance of SMB. LDHs can mitigate the detriment of aging to bitumen and SBS, and the deterioration of the rheological properties of SMB is obviously alleviated. As a result of the better dispersibility and storage stability, OLDHs exerted superior reinforcement of the anti-aging ability of SMB.

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.

scholarly journals Fatigue Properties of Layered Double Hydroxides Modified Asphalt and Its Mixture

2014 ◽  
Vol 2014 ◽  
pp. 1-6 ◽  
Author(s):  
Xing Liu ◽  
Shaopeng Wu ◽  
Ling Pang ◽  
Yue Xiao ◽  
Pan Pan
Keyword(s):  
Layered Double Hydroxides ◽  
Asphalt Mixture ◽  
Control Mode ◽  
Asphalt Pavements ◽  
Fatigue Properties ◽  
Modified Bitumen ◽  
Uv Aging ◽  
Thermal Oxidative Aging ◽  
Double Hydroxides ◽  
Term Field

This study investigated the influence of layered double hydroxides (LDHs) on the fatigue properties of asphalt mixture. In this paper, different aging levels (thin film oven test (TFOT) and ultraviolet radiation aging (UV aging for short)) of bitumen modified with various mass ratios of the LDHs were investigated. The TFOT and UV aging process were used to simulate short-term field thermal-oxidative aging and long-term field light UV aging of bitumen, respectively. The influences of LDHs on the fatigue properties of LDHs were evaluated by dynamic shear rheometer (DSR) and indirect tensile fatigue test. Results indicated that the introduction of LDHs could change the fatigue properties of bitumen under a stress control mode. The mixture with modified bitumen showed better fatigue resistance than the mixture with base bitumen. The results illustrated that the LDHs would be alternative modifiers used in the bitumen to improve the lifetime of asphalt pavements.

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.

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