scholarly journals Investigation of anti-aging of SBS modified bitumen containing surface organic layered double hydroxide

RSC Advances ◽  
2021 ◽  
Vol 11 (36) ◽  
pp. 22131-22139
Author(s):  
Canlin Zhang ◽  
Hongjun Dong ◽  
Ting Wang ◽  
Song Xu ◽  
Jun He ◽  
...  
Keyword(s):  
Layered Double Hydroxide ◽  
Modified Bitumen ◽  
Oxidative Aging ◽  
Aging Resistance ◽  
Double Hydroxide ◽  
Ultraviolet Aging ◽  
Excellent Improvement

OLDH exhibits excellent improvement on the thermo-oxidative aging and ultraviolet aging resistance of SBS modified bitumen.

THE INFLUENCE OF POLYMER ON RHEOLOGICAL AND THERMO OXIDATIVE AGING PROPERTIES OF MODIFIED BITUMEN BINDERS

2017 ◽  
Vol 79 (6) ◽  
Author(s):  
Nura Bala ◽  
Ibrahim Kamaruddin ◽  
Madzlan Napiah
Keyword(s):  
Softening Point ◽  
Storage Stability ◽  
Elastic Behavior ◽  
Modified Bitumen ◽  
Oxidative Aging ◽  
Modified Binders ◽  
Aging Resistance ◽  
Lower Temperature ◽  
Modified Binder ◽  
Temperature Susceptibility

Polymer modified bitumen (PMB) has been used for many years to improve the performance of asphalt concretes against premature pavement defects. In this research, modified samples were prepared with 2%, 3%, 4%, 5% and 6% Linear Low Density Polyethylene (LLDPE) polymer by weight of bitumen binder. The influence of LLDPE polymer was evaluated through binder properties test which includes penetration, softening point, storage stability, temperature susceptibility, rutting, fatigue and thermal oxidative aging resistance from a dynamic shear rheometer (DSR) measurements at a temperature of 20 OC to 60 OC. Results show that LLDPE polymer has a significant effect on binder properties. Penetration decreases and softening point increases with increasing LLDPE content on the modified binder after aging, which implies LLDPE improves the thermo oxidative aging resistance of the binder. Furthermore, the storage stability test shows that at higher LLDPE concentrations phase separation may occur. DSR analysis shows that modified binders have lower temperature susceptibility and higher aging resistance with increased stiffness and elastic behavior compared with unmodified binders. In addition, modified binders show enhanced resistance against high temperature rutting and at low temperature fatigue performance. It was found that the optimum LLDPE content is 6%.

Effect of multi-modified layered double hydroxide on aging resistance of nitrile-butadiene rubber

2020 ◽  
Vol 195 ◽  
pp. 108193
Author(s):  
Songhan Wan ◽  
Tianxiang Li ◽  
Songbo Chen ◽  
Xing Huang ◽  
Shuwei Cai ◽  
...  
Keyword(s):  
Layered Double Hydroxide ◽  
Butadiene Rubber ◽  
Nitrile Butadiene Rubber ◽  
Aging Resistance ◽  
Double Hydroxide

Investigation of UV Absorber Residue Improving Aging Properties of Bitumen

2016 ◽  
Vol 847 ◽  
pp. 413-417 ◽  
Author(s):  
Li Gao ◽  
Jian Ying Yu ◽  
Min Wu ◽  
Li Hui Xue
Keyword(s):  
Aging Process ◽  
Retention Rate ◽  
Modified Bitumen ◽  
Uv Aging ◽  
Oxidative Aging ◽  
Uv Absorber ◽  
Aging Index ◽  
Modify Bitumen ◽  
Aging Properties ◽  
Aging Resistance

Ultraviolet (UV) absorber residue was used to modify bitumen. Effects of UV absorber residue on thermo-oxidative and UV aging properties of bitumen were evaluated by conventional physical properties and SARA (saturates, aromatics, resins and bitumenenes) analysis. The results showed that the viscosity aging index (VAI) and softening point increment (SPI) of bitumen decreased significantly due to introduction of the UV absorber residue, and the ductility retention rate (DRR) was evidently higher compared to the pristine bitumen. SARA show that UV absorber residue can effectively restrain the gelatinization of bitumen resulted from aging. As a consequence, the UV absorber residue modified bitumen displays enhanced aging resistance properties, which can be attributed to the physical sorption of activated carbon to lighter components in the thermo-oxidative aging process and the absorption of UV absorption residue to the ultraviolet light in the process of UV aging.

Performance Evaluation of SBS Modified Bituminous Roofing Membrane Containing Layered Double Hydroxides

2014 ◽  
Vol 599 ◽  
pp. 203-207
Author(s):  
Song Xu ◽  
Wei Dan ◽  
Wen Zu Li ◽  
Jian Ying Yu
Keyword(s):  
Layered Double Hydroxides ◽  
Melt Blending ◽  
Modified Bitumen ◽  
Oxidative Aging ◽  
Aging Resistance ◽  
Waterproofing Membrane ◽  
Low Temperature Flexibility ◽  
Thermal Oxidative Aging ◽  
Double Hydroxides ◽  
Over Time

Layered double hydroxides (LDHs)/SBS modified bitumens used for waterproofing membrane were prepared by melt blending using various contents of SBS and LDHs. Effects of the LDHs on physical properties and thermal oxidative aging performance of modified bitumen were investigated. The results show that softening point and low temperature flexibility of LDHs/SBS modified bitumen are increased simultaneously with the rise of SBS content, while they are little affected by the change of LDHs content. The thermal oxidative aging resistance of SBS modified bitumen is gradually improved with increasing LDHs content. In addition, the aging rate of SBS modified bitumen with LDHs are evidently lower than that without LDHs over time, which indicates that LDHs improve the ability of SBS modified bitumen to resist the thermal oxidative aging effectively.

scholarly journals Effect of Zn/Al Layered Double Hydroxide Containing 2-Hydroxy-4-n-octoxy-benzophenone on UV Aging Resistance of Asphalt

2015 ◽  
Vol 2015 ◽  
pp. 1-13 ◽  
Author(s):  
Chao Peng ◽  
Jianying Yu ◽  
Jing Dai ◽  
Jian Yin
Keyword(s):  
Layered Double Hydroxide ◽  
Uv Light ◽  
Asphalt Binder ◽  
Synergetic Effect ◽  
Uv Aging ◽  
Modified Asphalt ◽  
Uv Absorber ◽  
Aging Resistance ◽  
Double Hydroxide ◽  
Sbs Modified Asphalt

UV radiation is a main factor to reduce the service life of asphalt pavement due to the UV aging of asphalt binder. To obtain enhanced UV aging resistance, an organic UV absorber called 2-hydroxy-4-n-octoxy-benzophenone (HNOB) had been intercalated into an inorganic UV absorber called Zn/Al layered double hydroxide (LDH) to play a combined anti-UV role in asphalt binder. Fourier transform infrared spectroscopy revealed that HNOB anions have been intercalated into the interlayer galleries of Zn/Al-LDH containing HNOB anions (Zn/Al-HNOB−-LDH). X-ray diffraction results of Zn/Al-LDH containingCO32−anions (Zn/Al-CO32--LDH) andZn/Al-CO32--LDH/styrene-butadiene-styrene (SBS) modified asphalt disclosed that asphalt molecules entered into LDH interlayer galleries to form an expanded phase structure. UV-Vis absorbance patterns showed that Zn/Al-HNOB−-LDH has a better capacity of blocking UV light due to the synergetic effect of HNOB and Zn/Al-LDH. The chemical fractions analysis, conventional physical tests, and rheological tests of SBS modified asphalt,Zn/Al-CO32--LDH/SBSmodified asphalt, and Zn/Al-HNOB−-LDH/SBS modified asphalt before and after UV aging testified that Zn/Al-HNOB−-LDH can improve the UV aging resistance of SBS modified asphalt more significantly.

scholarly journals Study on the Aging Resistance of Polyurethane Precursor Modified Bitumen and its Mechanism

2021 ◽  
Vol 13 (17) ◽  
pp. 9520
Author(s):  
Liang Zhang ◽  
Pengfei Li ◽  
Guanfeng Hu ◽  
Sufeng Zhang ◽  
Bin Hong ◽  
...  
Keyword(s):  
Mechanical Performance ◽  
Thermoplastic Elastomers ◽  
Modified Bitumen ◽  
Uv Aging ◽  
Oxidative Aging ◽  
Temperature Performance ◽  
Mechanical Methods ◽  
Aging Properties ◽  
Aging Resistance ◽  
The Impact

As an environmentally friendly alternative for the production of high-performance modified asphalt by chemical reactions, a liquid-state polyurethane-precursor-based reactive modifier (PRM) was developed and employed in the asphalt modification. In contrast to the traditional solid bitumen modifier, for example, rubber and thermoplastic elastomers, the PRM as a liquid modifier has more significant advantages in reducing energy consumption and improving asphalt performance, which has attracted widespread attention. However, the aging resistance and its mechanism are not clear. In view of this, the aging performance of two PRM-modified bitumen (PRM-70 and PRM-90), under the short-term thermo-oxidative aging, long-term thermo-oxidative aging, and ultraviolet (UV) aging conditions, was investigated through chemical and mechanical methods. The results show that the PRM-90 is more susceptible to the thermos-oxidative aging and UV aging. The use of low-penetration-grade bitumen and ensuring an adequate reaction are beneficial to enhance the aging resistance of PRM-modified bitumen. The impact of aging on high-temperature performance of PRM-modified bitumen is great, followed by the low-temperature performance and the anti-fatigue performance. The mechanic-relevant rheological aging index (RAI) and fracture energy index (FEI) are recommended to evaluate aging properties for PRM-modified bitumen. This study not only provides support for further research on the relationship between the aging properties and mechanical performance of PRM-modified bitumen, but also provides a reference for conducting mechanism analysis.

scholarly journals Evaluation of 3-methacryloxypropyltrimethoxysilane organic layered double hydroxide on the aging resistance of bitumen

2021 ◽  
Vol 1167 (1) ◽  
pp. 012016
Author(s):  
Canlin Zhang ◽  
Minxuan Chen ◽  
Ting Wang ◽  
Jun He ◽  
Guochuan Chen ◽  
...  
Keyword(s):  
Layered Double Hydroxide ◽  
Aging Resistance ◽  
Double Hydroxide

scholarly journals Effect of Fumed Silica Nanoparticles on Ultraviolet Aging Resistance of Bitumen

Nanomaterials ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 454
Author(s):  
Goshtasp Cheraghian ◽  
Michael P. Wistuba
Keyword(s):  
Silica Nanoparticles ◽  
Fumed Silica ◽  
Modified Bitumen ◽  
Oxidation Degree ◽  
Fumed Silica Nanoparticles ◽  
Aging Resistance ◽  
Improvement Effect ◽  
Nanoparticle Content ◽  
Ultraviolet Aging

In this study, bitumen modified by fumed silica nanoparticles was characterized through dynamic shear rheometer tests, scanning electron microscopy, and Fourier transform infrared spectroscopy. The fumed silica nanoparticles were used in three different ratios, i.e., 0.1, 0.2 and 0.3 wt.-% of bitumen. Specifically, the modified bitumen characteristics were studied after laboratory aging by analyzing the chemical composition and rheological properties. From the determination of oxidation degree and carbonyl index it was found that the resistance of the modified bitumen to ultraviolet aging was improved with the increasing nanoparticle content. In bitumen modified by fumed silica nanoparticles, the nanoparticles were well dispersed. Moreover, the results illustrated that the bitumen properties were improved, and the improvement effect of 0.1 wt.-% fumed silica nanoparticles was more distinct than the higher concentrations.

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