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.

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.

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 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.

Effect of Micron Fly Ash and Nano Calcium Carbonate on Properties of Styrene-Butadiene-Styrene Copolymer Modified Asphalt

2014 ◽  
Vol 919-921 ◽  
pp. 1169-1172
Author(s):  
De Jie Zhou ◽  
Nian Feng Han
Keyword(s):  
Fly Ash ◽  
Softening Point ◽  
Melt Blending ◽  
Modified Bitumen ◽  
Modified Asphalt ◽  
Aging Property ◽  
Styrene Butadiene ◽  
Sbs Modified Asphalt ◽  
Better Than ◽  
Butadiene Styrene

Composite modified asphalts with micron fly ash/SBS and nanocalcium carbonate (nanoCaCO3)/ SBS were prepared respectively by melt blending. The ageing properties and physical properties of micron fly ash/SBS and CaCO3/SBS modified bitumen were investigated. The results demonstrate that micron fly ash/SBS modified bitumen exhibited an increasing softening point, a decreasing penetration and a decreasing ductility. Compared with that of SBS modified bitumen, the anti-aging property of the micron fly ash/SBS modified bitumen becomes worse. Effects of the nanoCaCO3 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 CaCO3/SBS modified asphalt was better than that of the SBS modified asphalt.

Preparation and Properties of PS-OMMT/SBS Composite Modified Asphalt

2011 ◽  
Vol 99-100 ◽  
pp. 815-818 ◽  
Author(s):  
De Jie Zhou ◽  
Nian Feng Han ◽  
Xin De Tang
Keyword(s):  
In Situ Polymerization ◽  
Interlayer Spacing ◽  
Polymerization Reaction ◽  
Melt Blending ◽  
Modified Asphalt ◽  
Montmorillonite Clays ◽  
Aging Property ◽  
Organophilic Montmorillonite ◽  
Sbs Modified Asphalt

The polystyrene modified organophilic montmorillonite clays (PS-OMMT) were preparation through intercalating styrene monomer into the layer of OMMT by in-situ polymerization. Composite modified asphalts with PS-OMMT and SBS were prepared by melt blending. Results showed the interlayer spacing of OMMT was increased by the intercalated polymerization reaction of styrene. The modified OMMT 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-OMMT 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-OMMT /SBS modified asphalt was greatly improved.

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.

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.

The Experimental Research on Durability of Sasobit Modified Asphalt

2011 ◽  
Vol 233-235 ◽  
pp. 1774-1781
Author(s):  
Jie Ji ◽  
Xiao Hui Luo ◽  
Da Li Liu
Keyword(s):  
Thin Film ◽  
System Performance ◽  
Grade System ◽  
Micro Structure ◽  
Oven Test ◽  
Modified Asphalt ◽  
Performance Grade ◽  
Odor Emission ◽  
State Mixing ◽  
Sbs Modified Asphalt

Sasobit has been applied into asphalt successfully since 1997. From then on, a lot of studies emphasizes on how Sasobit can lower asphalt’s viscosity and reduce poison odor emission. However, the durability of asphalt containing Sasobit is ignored to research. This paper aimed to analyze Sasobit impact on the durability of asphalt. In this study, the Sasobit modified asphalt was blended using different Sasobit contents of 2%, 3%, 4% and 5% by weight of asphalt into the base asphalt (SBS modified asphalt). The Rolling Thin Film Oven test (RTFO) and Pressure Aging Vessel test (PAV) were conducted to simulate the mixing and construction aging and in-service aging of asphalt. The properties and micro-structure of the base asphalt and Sasobit modified asphalt in three different aging states (original state, mixing and construction aging state and in-service aging state) were tested by using the Penetration-Grade system, Performance-Grade system and fluorescence microscope. The aging indexes of the base asphalt and Sasobit modified asphalt were calculated to compare their durability. It was evident that the durability of the Sasobit modified asphalt was mostly affected by the type of base asphalt and Sasobit had a little impaction on the durability of the asphalt.

Research on the Impact of Temperature on the Softening Point of SBS Modified Asphalt

2013 ◽  
Vol 365-366 ◽  
pp. 978-982
Author(s):  
Xiao Wei Feng ◽  
De Wen Zhang
Keyword(s):  
Softening Point ◽  
Heating Temperature ◽  
Road Construction ◽  
Curing Temperature ◽  
Important Indicator ◽  
Modified Asphalt ◽  
Influence Of Temperature On ◽  
Sbs Modified Asphalt ◽  
The Impact ◽  
Initial Heating

The softening point of modified asphalt is an extremely important indicator to evaluate the high-temperature performance; its the temperature of modified asphalt sample emerging shear deformation under the action of certain shear stress according to the specific heating rate. Its found that in the actual construction and testing, different temperature conditions has a larger impact on the softening point of the modified asphalt, which has adverse affect on road construction. This paper studied and researched the influence of temperature on modified asphalt softening point indicators from the different test temperature, including packing compact temperature, scraper temperature in removal of asphalt that above test mode, standing temperature, curing temperature and initial heating temperature before test.

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