Research on Aging Properties of Tourmaline Modified Asphalt

2012 ◽  
Vol 535-537 ◽  
pp. 1715-1718 ◽  
Author(s):  
Su Min Hu ◽  
Chao Hui Wang ◽  
Qun Le Du ◽  
Rui Li
Keyword(s):  
Thin Film ◽  
Softening Point ◽  
Melt Blending ◽  
Modified Asphalt ◽  
Aging Properties ◽  
Aged Asphalt ◽  
Different Types ◽  
Aging Performance

Aging properties of tourmaline modified asphalt prepared by melt blending were studied. The change laws of aging properties of asphalt caused by different types and contents of tourmaline were studied systematically by rotated thin film oven tests (RTFOT), in which the indices of aged residues such as softening point, penetration and ductility were tested. The results showed that the anti-aging performance of asphalt was improved effectually with addition of tourmaline, the ratio of residual penetration and ductility increased, and the softening point increment of aged asphalt decreased. The improvement of anti-aging performance of asphalt reduced with the increasing mixing amount of tourmaline. Tourmaline anion powder (5000ions) was recommended to improve the anti-aging performance of asphalt.

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.

Effect of Waste Edible Animal Oil on Physical Properties of Aged Asphalt

2014 ◽  
Vol 599 ◽  
pp. 130-134 ◽  
Author(s):  
Yang Sang ◽  
Mei Zhu Chen ◽  
Jin Wen ◽  
Bin Bin Leng ◽  
Shao Peng Wu
Keyword(s):  
Thin Film ◽  
Physical Properties ◽  
Softening Point ◽  
Asphalt Binders ◽  
Oven Test ◽  
Modified Asphalt ◽  
Aged Asphalt ◽  
Sbs Modified Asphalt

In order to explore the feasibility of waste edible animal oil used as the asphalt rejuvenator, this study investigated the effect of waste edible animal oil on softening point, penetration, ductility and viscosity of aged asphalt binders. The aged asphalt binders were obtained from the indoor simulating aging processes by using Thin Film Oven Test (TFOT) and Pressure Aging Vessel (PAV). The results show that the dosage of waste animal oil has different effect on physical properties of aged asphalt. Both 70# asphalt and SBS modified asphalt have the optimal content of waste edible animal oil to achieve the best physical properties. The optimal contents of waste edible animal oil for 70# asphalt and SBS modified asphalt are 6% and 4%, respectively.

PS-MMT/SBS Composite Modified Asphalt: Preparation and Aging Property

2010 ◽  
Vol 168-170 ◽  
pp. 912-915
Author(s):  
De Jie Zhou ◽  
Nian Feng Han ◽  
Xin De Tang
Keyword(s):  
Thin Film ◽  
Thermal Stability ◽  
Softening Point ◽  
In Situ Polymerization ◽  
Melt Blending ◽  
Oven Test ◽  
Modified Asphalt ◽  
Aging Property ◽  
Sbs Modified Asphalt

The PS-MMT was synthesized through intercalating styrene monomer into the layer of MMT by in-situ polymerization. Composite modified asphalts with PS-MMT and SBS were prepared by melt blending. Rolling thin film oven test (RTFOT) was carried out to study the aging property. The results demonstrate that both modified MMT and SBS homogeneously disperse in the base asphalt, which lead to an improvement in terms of toughness, strength, and thermal stability. Impact of the PS-MMT on the properties of SBS modified asphalt appears as a decreasing penetration, an increasing softening point, and a decreasing ductility. Compared with that of SBS modified asphalt, the anti-aging property of PS-MMT /SBS modified asphalt was greatly improved.

Preparation and Aging Property of Nannocomposite CaCO3/SBS Modified Asphalts

2011 ◽  
Vol 688 ◽  
pp. 213-216 ◽  
Author(s):  
Xin De Tang ◽  
Zhong Guo He ◽  
Xin Kai Man ◽  
De Yang Zhang
Keyword(s):  
Thin Film ◽  
Softening Point ◽  
Melt Blending ◽  
Nano Structure ◽  
Oven Test ◽  
Modified Asphalt ◽  
Deformation Ability ◽  
Aging Property ◽  
Sbs Modified Asphalt ◽  
Oxidative Ageing

Composite modified asphalts with nanoscale calcium carbonate (CaCO3) and SBS were prepared by melt blending. Rolling thin film oven test (RTFOT) was carried out to study the aging property. The results demonstrate that both nano CaCO3 and SBS show homogeneous dispersion in the base asphalt, which lead to an improvement in terms of toughness, strength, and thermal stability. Influence of nano CaCO3 on the properties of SBS modified asphalts appears as a decreasing penetration, an increasing softening point, and a decreasing ductility. The anti-deformation ability under low temperature of nano CaCO3/SBS modified asphalts improved significantly. The softening point of nano CaCO3/SBS modified asphalt decreases after aging, in contrast to that of the base asphalt, which can be ascribed to the different rheological peoperties between nano CaCO3/SBS modified asphalt and the base asphalt. Compared with that of SBS modified asphalt, the anti-ageing property of nano CaCO3/SBS modified asphalts improved significantly. This indicates that nano structure of CaCO3 in modified asphalt can prevent oxygen from diffusing and permeating in matrix and the thermo-oxidative ageing of base asphalt and SBS slows down.

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.

Nano-Montmorillonite/SBS Composite Modified Asphalt: Preparation and Aging Property

2011 ◽  
Vol 688 ◽  
pp. 175-179 ◽  
Author(s):  
Xin De Tang ◽  
Xiang Li Kong ◽  
Zhong Guo He ◽  
Jun Li
Keyword(s):  
Softening Point ◽  
Composite Structures ◽  
Melt Blending ◽  
X Ray Diffraction ◽  
Nano Composite ◽  
Oxidative Aging ◽  
Modified Asphalt ◽  
Deformation Ability ◽  
Aging Property ◽  
Sbs Modified Asphalt

Nano-montmorillonite (Nano-MMT)/SBS composite modified asphalts were prepared by melt blending, the aging property of which was detected by rolling thin film oven test (RTFOT) method. The microstructure of Nano-MMT/SBS modified asphalts was characterized by X-ray diffraction (XRD). The results demonstrated that nano-composite structures formed by the intercalation effect of SBS and asphalt into the MMT lamellae, which led to improvement in terms of toughness, strength, and thermal stability. In comparison with SBS modified asphalt, Nano-MMT impact on the properties of the modified asphalt appeared as a decreasing penetration, an increasing softening point, and a decreasing ductility. The anti-deformation ability under high temperature of Nano-MMT/SBS modified asphalt improved significantly. The softening point of the Nano-MMT/SBS modified asphalt decreased after aging, in contrast with that of the base asphalt, which could be attributed to the different rheological properties between the Nano-MMT/SBS modified asphalt and the base asphalt. Compared with that of SBS modified asphalt, the anti-aging property of Nano-MMT/SBS modified asphalt improved dramatically. This indicated that the lamellar structure of montomorillonite in modified asphalt could prevent oxygen from diffusing and permeating in matrix and the thermo-oxidative aging of base asphalt and SBS weakens.

Effect of Aging on the Low Temperature Performance of Asphalt Binder

2013 ◽  
Vol 438-439 ◽  
pp. 369-372
Author(s):  
Ning Li Li ◽  
Xin Po Zhao ◽  
Cai Li Zhang ◽  
Hu Hui Li ◽  
Qing Yi Xiao
Keyword(s):  
Thin Film ◽  
Low Temperature ◽  
Asphalt Pavement ◽  
Asphalt Binder ◽  
Bending Beam Rheometer ◽  
Oven Test ◽  
Modified Asphalt ◽  
Temperature Performance ◽  
Different Types ◽  
Low Temperature Performance

During the service of asphalt pavement, the aging makes asphalt binder become brittle, gradually lose flexibility and adhesion. All these result in the low-temperature properties of asphalt pavement to be poor. This paper conducts the rolling thin film oven test (RTFOT) and pressure aging vessel (PAV) test on base asphalt and rubber-modified asphalt respectively. The bending beam rheometer (BBR) test was conducted on original asphalts, rolling thin film oven test (RTFOT) residuals and RTFOT + pressure aging vessel (PAV) residuals of base asphalt and rubber-modified asphalt respectively. Results indicate that the low-temperature properties of all aged asphalts were declined. The attenuation of low-temperature properties of RTFOT + PAV residuals is larger than that of the RTFOT residuals. The attenuation of different types of asphalt is different. From the overall trend, effect of aging on the low-temperature properties of asphalt binder reduced as the test temperature reduction. The rubber-modified asphalt has superior low-temperature performance than that of base asphalt, and its low-temperature performance decreases more slowly than the base asphalt.

scholarly journals Preparation and Short-Term Aging Properties of Asphalt Modified by Novel Sustained-Release Microcapsules Containing Rejuvenator

Materials ◽  
2019 ◽  
Vol 12 (7) ◽  
pp. 1122 ◽  
Author(s):  
Xin Yan ◽  
Guotao Ning ◽  
Xiaofeng Wang ◽  
Tao Ai ◽  
Peng Zhao ◽  
...  
Keyword(s):  
Sustained Release ◽  
Effective Means ◽  
Average Particle Size ◽  
Structural Basis ◽  
Average Particle ◽  
Modified Asphalt ◽  
Aging Properties ◽  
Aged Asphalt ◽  
Heating Treatment ◽  
Light Components

Aged asphalt can enormously affect the performance of asphalt pavement and cause serious environmental hazards. Microcapsule-modified asphalt is one of the effective means to improve the anti-aging ability of asphalt. In this work, novel sustained-release microcapsules containing rejuvenator were prepared by the solvent evaporation method. The morphology of the microcapsules was characterized by scanning electron microscopy (SEM). The sustained-release properties of the microcapsules were investigated by static thermogravimetric analysis. The physical properties such as penetration, ductility, softening point, and Brookfield viscosity of the original asphalt and microcapsule-modified asphalt were studied. In addition, the viscoelasticity of the original asphalt and microcapsule-modified asphalt was investigated by means of a dynamic shear rheometer (DSR). The results show that the prepared microcapsules have a smooth surface and a complete encapsulation with an average particle size of 60 μm. After the heating treatment (above 140 °C), a large number of micropores were formed on the shell surface of microcapsules, which provided a structural basis for the sustained-release of rejuvenator. The release rate of the rejuvenator was obviously slowed down by the microcapsules. The aging behavior of sustained-release microcapsules containing rejuvenator-modified asphalt can be greatly improved. The enhanced anti-aging properties of sustained-release microcapsule-modified asphalt are attributed to the functions of the rejuvenator which can be slowly released from the micropores on the microcapsules’ surface, after which the light components lost in the original asphalt can be supplemented.

Effect of Nano Calcium Carbonate and Montmorillonite on Properties of Styrene–Butadiene–Styrene Copolymer Modified Asphalt

2011 ◽  
Vol 99-100 ◽  
pp. 1035-1038 ◽  
Author(s):  
Nian Feng Han ◽  
De Jie Zhou ◽  
Xin De Tang
Keyword(s):  
Calcium Carbonate ◽  
Melt Blending ◽  
Modified Asphalt ◽  
Aging Properties ◽  
Aging Property ◽  
Styrene Butadiene Styrene ◽  
Styrene Butadiene ◽  
Sbs Modified Asphalt ◽  
Better Than ◽  
Butadiene Styrene

Composite modified asphalts with nano calcium carbonate (nano CaCO3)/ SBS and nano montmorillonite (nano MMT)/SBS were prepared respectively by melt blending. Rolling thin film oven test (RTFOT) was carried out to study the aging properties. The results demonstrate that CaCO3/SBS and MMT/SBS homogeneously disperse in the base asphalt, which lead to an improvement in terms of toughness, strength, and thermal stability. Effects of the nano CaCO3 and nano MMT on the properties of SBS modified asphalt appear as a decreasing penetration, an increasing softening point, and a decreasing ductility. The anti-aging property of the nano MMT/SBS modified asphalt was better than that of the CaCO3/SBS modified asphalt and SBS modified asphalt.

scholarly journals Preparation, Structure, and Properties of Modified Asphalt with Waste Packaging Polypropylene and Organic Rectorite

2019 ◽  
Vol 2019 ◽  
pp. 1-9 ◽  
Author(s):  
Youliang Cheng ◽  
QianGang Fu ◽  
Changqing Fang ◽  
Qingling Zhang ◽  
Chan Lu
Keyword(s):  
High Temperature ◽  
Operational Performance ◽  
Melt Blending ◽  
Scanning Calorimetry ◽  
Modified Asphalt ◽  
Blending Method ◽  
Aging Properties ◽  
High Temperature Storage ◽  
Deformation Ability ◽  
Temperature Storage

The modified asphalt with waste packaging polypropylene (WPP) and WPP/organic rectorite (OREC) was prepared by the melt blending method. The effects of OREC on the physical and aging properties of WPP-modified asphalt were studied. The morphologies, microstructure, and thermal properties of WPP-modified asphalt and WPP/OREC-modified asphalt were characterized by fluorescence microscopy, Fourier transform infrared spectroscopy (FTIR), differential scanning calorimetry (DSC), and thermogravimetry (TG). The results show that the composite-modified asphalt exhibits excellent ductility and plasticity when the contents of WPP and OREC are 4 wt. % and 1.5 wt. %, respectively. The deformation ability, softening point, ductility, and high-temperature storage stability of WPP-modified asphalt can be improved by adding the appropriate content of OREC. It is demonstrated that the composite-modified asphalt has an outstanding operational performance when the content of OREC is in the range of 1.5–2 wt. %. Compared with base asphalt, the high temperature performance of WPP-modified asphalt and WPP/OREC-modified asphalt is also improved significantly.

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