scholarly journals Resistance to Ultraviolet Aging of Nano-SiO2 and Rubber Powder Compound Modified Asphalt

Materials ◽  
2020 ◽  
Vol 13 (22) ◽  
pp. 5067 ◽  
Author(s):  
Guoping Qian ◽  
Changdong Yang ◽  
Haidong Huang ◽  
Xiangbing Gong ◽  
Huanan Yu
Keyword(s):  
Uv Light ◽  
Temperature Property ◽  
Uv Aging ◽  
Rubber Powder ◽  
Modified Asphalt ◽  
Nano Sio2 ◽  
Aging Property ◽  
Compound Modification ◽  
Ultraviolet Aging ◽  
Low Temperature Property

Ultraviolet (UV) aging degrades the life span of asphalt pavement, nanomaterials used as modifiers exhibit good shielding function on UV light, but generally degrade the low-temperature property of asphalt, a compound modification was found to be a solution. In this study, nano-SiO2 and rubber powder were blended together with base asphalt to prepare compound modified asphalt. Compound modified asphalt with different blending dosages were subjected to UV light via a self-made UV aging simulation chamber. Basic performance tests and rheological tests were conducted including the UV aging influence. An optimum compound ratio was finally recommended based on the goal to remove the adverse effect of nano-SiO2 on the thermal cracking. Results show that the anti-UV aging property of asphalt is improved obviously due to the blocking function of nano-SiO2 and carbon black in rubber powder, and the enhancing effect of nano-SiO2 is found to be the most significant.

scholarly journals Enhancing Effect of Waste Engine Oil Bottom Incorporation on the Performance of CR+SBS Modified Bitumen: A Sustainable and Environmentally-Friendly Solution for Wastes

2021 ◽  
Vol 13 (22) ◽  
pp. 12772
Author(s):  
Changjiang Liu ◽  
Qiuping Wang
Keyword(s):  
Asphalt Binder ◽  
Engine Oil ◽  
Chemical Compositions ◽  
Self Healing ◽  
Temperature Property ◽  
Modified Bitumen ◽  
Modified Asphalt ◽  
Waste Engine Oil ◽  
Sbs Modified Asphalt ◽  
Low Temperature Property

Waste engine oil bottom (WEOB) is a hazardous waste whose effect as an additive to CR+SBS modified asphalt is rarely studied. In this study, the CR+SBS asphalt binder was modified with WEOB in different concentrations (3, 6, and 9 wt%). The GC–MS and FTIR were performed to evaluate the chemical compositions of WEOB and WEOBCR+SBS asphalt. The results showed that the main constituents of WEOB were similar to the functional groups of asphalt, along with maleic anhydride (MAH). Pavement performance-related rheological tests such as RV, temperature sweep (TS), FS, MSCR, and BBR were carried out. Results show that WEOBCR+SBS-6 exhibited the best high- and low-temperature property, followed by CR+SBS-3 and CR+SBS-9. Fluorescence microscope (FM) test, bar thin layer chromatograph (BTLC) test, FTIR, and AFM tests were carried out to evaluate the micro-morphologies and modification mechanism. The analysis revealed increased trends in resin fraction as opposed to asphaltene fraction with the increase of WEOB content. FTIR analysis revealed that the amide groups in WEOBCR+SBS asphalt bonded to the free radicals of CR. Moreover, a modification mechanism was elaborated. WEOB strengthens the cross-linked structure of CR+SBS polymers, reacting with SBS to graft onto MAH-g-SBS, and the free radical of CR interacts with the amide group in WEOB to form a bond. In addition, the content of lightweight components and surface roughness of SBS specimens were in good correlation, which contributed to the rutting resistance and adhesion and self-healing performance.

Study on Properties and Pavement Performance of Anti-Flaming and Warm-Mix SBS Modified Asphalt

2011 ◽  
Vol 97-98 ◽  
pp. 367-372 ◽  
Author(s):  
Yang Cheng Huang ◽  
Zhao Yi He
Keyword(s):  
Orthogonal Experiment ◽  
Asphalt Mixture ◽  
Fire Retardant ◽  
Temperature Property ◽  
Modified Asphalt ◽  
Water Sensitivity ◽  
Property Loss ◽  
Lower Temperature ◽  
Sbs Modified Asphalt ◽  
Low Temperature Property

In order to solve problems such as environmental contamination, large resource consuming, and the inflammability of present asphalt mixture, a warm-mix agent was chosen and fire retardant was added to asphalt to modify its characteristics. The anti-flaming and warm-mix asphalt has been produced in the orthogonal experiment, and its road property and anti-flaming property lived up to expectation. The experiment shows that under the condition of a lower temperature (15-20°C lower than the the mix temperature), the rutting resistance of the anti-flaming and warm-mix SBS modified asphalt , but its low temperature property and water sensitivity decreased. This asphalt has excellent anti-flaming characteristic, and thus it can decrease the property loss in case of fire.

Study of High Temperature Performance and Low Temperature Property on Layered Silicate Modified Asphalt Concrete

2012 ◽  
Vol 509 ◽  
pp. 189-193 ◽  
Author(s):  
Shao Peng Wu ◽  
Tian Gui Liu ◽  
Ling Pang ◽  
Ting Wei Cao ◽  
Pan Pan
Keyword(s):  
High Temperature ◽  
Low Temperature ◽  
Asphalt Concrete ◽  
Bending Strength ◽  
Layered Silicate ◽  
Temperature Property ◽  
Three Point Bending ◽  
Modified Asphalt ◽  
Temperature Performance ◽  
Low Temperature Property

Montmorillonite (MMT), a typical layered silicate, has been widely used to prepare modified asphalt. This paper investigates the high temperature performance and low temperature property on layered silicate modified asphalt concrete. The control concrete is prepared by base asphalt. Meanwhile, three-point bending, conventional and SHRP rutting tests are used to compare the properties of the two types of asphalt concrete. The results of conventional and SHRP rutting tests show that the modified asphalt concrete exhibits a better high temperature performance than the control concrete. And the maximum bending strength of modified asphalt concrete is higher than that of control concrete at the same temperature. It can be concluded that both the high temperature performance and low temperature property of asphalt concrete has been improved efficiently by utilization of layered silicate modified asphalt.

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 Effect of the Amount of Mineral Powder on the Ultraviolet Aging Properties of Asphalt

2016 ◽  
Vol 2016 ◽  
pp. 1-9 ◽  
Author(s):  
Xiangbing Xie ◽  
Shenjia Tong ◽  
Yabi Ding ◽  
Hongni Liu ◽  
Linyuan Liang
Keyword(s):  
Gel Permeation Chromatography ◽  
Uv Aging ◽  
Modified Asphalt ◽  
Aging Properties ◽  
The Matrix ◽  
Mineral Powder ◽  
Styrene Butadiene ◽  
Sbs Modified Asphalt ◽  
Asphalt Mortar ◽  
Ultraviolet Aging

Mortar has an important influence on the viscosity and durability of a mixture. The effects of the amount of mineral powder in asphalt mortar on the ultraviolet (UV) aging properties of asphalt were investigated by a Fourier transform infrared spectrum (FTIR), gel permeation chromatography (GPC), and dynamic shear rheometer (DSR). The FTIR results show that the UV-resistant aging ability of asphalt mortar was superior to asphalt and that the carbonyl indices of the SBS- (styrene-butadiene-styrene-) asphalt mortar and matrix asphalt mortar were more significant. The GPC results show that the molecular weight distribution coefficient (Mw/Mn) of the SBS-asphalt-filler mastic is 1.0 and that of the matrix asphalt-filler mastic is 1.2, which is the largest. The macro-property is the most stable. The DSR results show that the matrix asphalt-filler mastic ranging from 1.0 to 1.2 and the SBS-modified asphalt-filler mastic ranging from 0.8 to 1.0 show the best UV aging resistance. Therefore, the effects of the amount of mineral powder cannot be ignored, suggesting that the best mass ratio of the matrix asphalt mortar is 1.2 and that of the SBS-modified asphalt mortar is 1.0 during the UV aging process.

scholarly journals Greener Solution to Waste Corn Stalks and Shortage of Asphalt Resource: Hydrochar Produced by Hydrothermal Carbonization as a Novel Performance Enhancer for Asphalt Binder

Materials ◽  
2021 ◽  
Vol 14 (6) ◽  
pp. 1427
Author(s):  
Xiaoming Wu ◽  
Chichun Hu
Keyword(s):  
High Temperature ◽  
Reaction Temperature ◽  
Storage Stability ◽  
Asphalt Binder ◽  
Aging Effect ◽  
Experimental Tests ◽  
Hydrothermal Carbonization ◽  
Modified Asphalt ◽  
Direct Combustion ◽  
Aging Property

Utilization of waste corn stalks (CS) has seized extensive attention due to high annual output and hazardous impact of piling aside or direct combustion on environment. However, previously there has been a lot of emphasis on improvement of its energy efficiency as solid fuel while limited investigations are available which explore the possibility of applying corn stalks as performance enhancer in asphalt binder. The purpose of this study is to examine the potential of employing hydrochar as modifiers in asphalt binder by a series of experimental tests. In this study, two hydrochar were produced from corn stalks by a novel process called hydrothermal carbonization at a different reaction temperature. The two hydrochar and their responding hydrochar-modified asphalt (HCMA) were tested by chemical and rheological tests. Chemical analysis detected the interaction between hydrochar and binder factions, resulting in poor compatibility but satisfying anti-aging property. Even though hydrochar increased the viscosity of bitumen, implying worse workability, and caused poor storage stability, ameliorated performance of asphalt binder at high temperature by incorporating hydrochar was verified by various criteria such as higher performance grade (PG) failure temperature and lower non-recoverable creep compliance (Jnr). Moreover, higher reaction temperature makes hydrochar’s particles smaller and more homogeneous, which results in slightly lower enhanced high temperature performance, more satisfying workability, better storage stability, and greater anti-aging effect of hydrochar-modified asphalt. Eventually, this study provided a promising win-win solution to environment problems concerning corn stalk treatment and shortage of asphalt binder. Further exploration of methods to improve HCMA’s storage stability, real-scale corroboration on trial section and life cycle assessment of asphalt pavement containing hydrochar modifiers will be followed in the future.

Performance improvement and aging property of oil/SBS modified asphalt

2021 ◽  
Vol 300 ◽  
pp. 123735
Author(s):  
Jing Xu ◽  
Jianzhong Pei ◽  
Jun Cai ◽  
Tao Liu ◽  
Yong Wen
Keyword(s):  
Performance Improvement ◽  
Modified Asphalt ◽  
Aging Property ◽  
Sbs Modified Asphalt

The Preparation Technology and Performance Study of SBS and Rubber Powder Composite Modified Asphalt

2013 ◽  
Vol 361-363 ◽  
pp. 1617-1620 ◽  
Author(s):  
Li Liu ◽  
Zhao Hui Liu ◽  
Sheng Li
Keyword(s):  
Softening Point ◽  
Elastic Recovery ◽  
Powder Composite ◽  
Performance Study ◽  
Preparation Technology ◽  
Rubber Powder ◽  
Modified Asphalt ◽  
And Performance

Taking SBS and rubber powder as modifier, adopting the dosage of 4%, 5%, and 6% of SBS while 2%, 4%, 6% of rubber powder to prepare composite modified asphalt, studied the preparation technology of composite modified asphalt, analyzed the trend of ductility, penetration, softening point and elastic recovery. The results show a certain SBS dosage, with the increase of the rubber powder, ductility decrease while softening point and elastic recovery increase, penetration decrease first and then rise. It can provide reference for the preparation technology and performance study of composite modified asphalt.

Property of Anti-Ultraviolet Aging of LDHs Modified Asphalt

2018 ◽  
Vol 33 (3) ◽  
pp. 634-638 ◽  
Author(s):  
Hechuan Li ◽  
Jianying Yu ◽  
Shaopeng Wu ◽  
Ling Pang ◽  
Yuanyuan Li ◽  
...  
Keyword(s):  
Modified Asphalt ◽  
Ultraviolet Aging
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