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.

Effect of salicylic acid intercalated layered double hydroxides on ultraviolet aging properties of bitumen

2015 ◽  
Vol 49 (4) ◽  
pp. 1235-1244 ◽  
Author(s):  
Song Xu ◽  
Jianying Yu ◽  
Canlin Zhang ◽  
Tingting Yao ◽  
Yubin Sun
Keyword(s):  
Salicylic Acid ◽  
Layered Double Hydroxides ◽  
Aging Properties ◽  
Double Hydroxides ◽  
Ultraviolet Aging

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.

Effect of etched Layered double hydroxides on anti ultraviolet aging properties of bitumen

2018 ◽  
Vol 178 ◽  
pp. 42-50 ◽  
Author(s):  
Zhilong Cao ◽  
Lihui Xue ◽  
Min Wu ◽  
Bianyang He ◽  
Jianying Yu ◽  
...  
Keyword(s):  
Layered Double Hydroxides ◽  
Aging Properties ◽  
Double Hydroxides ◽  
Ultraviolet Aging

Pavement Performance and Anti-Aging Property of Microscale Flyash/SBS Modified Asphalt

2010 ◽  
Vol 663-665 ◽  
pp. 1333-1336
Author(s):  
Xin De Tang ◽  
Xiang Li Kong ◽  
Zhong Guo He ◽  
Jun Li
Keyword(s):  
Thin Film ◽  
Thermal Stability ◽  
Softening Point ◽  
Pavement Performance ◽  
Melt Blending ◽  
Oven Test ◽  
Modified Asphalt ◽  
Deformation Ability ◽  
Aging Property ◽  
Sbs Modified Asphalt

Microscale flyash/SBS composite modified asphalts (CMA) were prepared by melt blending. Rolling thin film oven test (RTFOT) was employed to study the anti-aging property. Both flyash and SBS disperse homogeneously in the base asphalt, which lead to an improvement in terms of toughness, strength, and thermal stability. Moreover, microscale flyash plays a significant role in the CMA. The effect of flyash on the properties of SBS modified asphalt appears as a decreasing penetration, an increasing softening point, and a decreasing ductility. The anti-deformation ability under high temperature of the CMA improved significantly. In comparison with that of the base asphalt, the softening point of the CMA decreases after aging, which maybe attribute to the different rheological properties between the CMA and the base asphalt. Compared to that of SBS modified asphalt, the anti-aging property of CMA improved significantly. This demonstrates that the microstructure of flyash can prevent oxygen from diffusing and permeating.

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