scholarly journals Effect of M-resin-based Stabilizer on the Performance of SBS Modified Asphalt

2021 ◽  
Author(s):  
Zhen LEI ◽  
Zhirong JIA ◽  
Xuefeng LIN ◽  
Chaoyu LI ◽  
Heng LIU ◽  
...  
Keyword(s):  
Softening Point ◽  
Orthogonal Experiment ◽  
Fluorescent Microscopy ◽  
Two Phase ◽  
Modified Asphalt ◽  
Industrial Solid Waste ◽  
Nano Zinc Oxide ◽  
Microscopic Morphology ◽  
Nano Zinc ◽  
Sbs Modified Asphalt

Industrial solid waste M-resin (MR) contains high sulfur content which was difficult to be comprehensively utilized. According to the vulcanization reaction mechanism, MR was used as vulcanizing agent, nano zinc oxide (ZnO) as an activator, tetramethyl thiuram disulfide (TMTD) as an accelerator to produce M-resin-based stabilizer. MR (0.5, 1, 1.5, 2, 2.5), ZnO (0.1, 0.2, 0.3, 0.4, 0.5) and TMTD (0.06, 0.08, 0.1, 0.12, 0.14) were mixed with different contents, a three-factor and five-level orthogonal experiment was designed to test the penetration, ductility, softening point and 48 h softening point difference of SBS modified asphalt. Based on the four indexes, the basic formula of the stabilizer was obtained. The influence of kaolin, an auxiliary material, on the thermal stability was compared, and the formula were optimized, the appropriate dosage was determined. The microscopic morphology of the modified asphalt and SBS developmental fineness was analyzed with the fluorescent microscopy technology, and the SBS developmental fineness was studied with the generated binary graph and skeleton graph. DSR test was carried out to detect rheological properties of modified asphalt with different dosages of MR-based stabilizes. The results show that MR can significantly improve the thermal storage stability of modified asphalt. The ratio of MR:TMTD:ZnO:Kaolin is 1.5:0.5:0.08:12, and the appropriate dosage is 1.02 %. The stabilizer can reduce the 48 h softening point difference 33.6 ℃, increase the softening point 13.6 ℃, decrease the penetration degree 9.7 mm, but it has little effect on 5 ℃ ductility index. The microscopic images show that a cavity two-phase continuous network structure is formed inside the modified asphalt under the appropriate dosage of M-resin-based stabilizer. The SBS developmental fineness is 2.36 μm, and the uniformity is good. DSR test also shows that stabilizer can effectively improve the high temperature performance of SBS modified asphalt.

scholarly journals Synergetic Effect of Nano-ZnO and Trinidad Lake Asphalt for Antiaging Properties of SBS-Modified Asphalt

2020 ◽  
Vol 2020 ◽  
pp. 1-14
Author(s):  
Yiqun Zhan ◽  
Jun Xie ◽  
Yulin Wu ◽  
Yifan Wang
Keyword(s):  
Rheological Properties ◽  
Synergetic Effect ◽  
Characteristic Functional ◽  
Nano Zno ◽  
Modified Asphalt ◽  
Nano Zinc Oxide ◽  
Nano Zinc ◽  
Effects Of Aging ◽  
Sbs Modified Asphalt ◽  
Ultraviolet Aging

In order to address the influence of aging on the performance degradation of SBS-modified asphalt, a composite modification of SBS-modified asphalt by nano-zinc oxide (nano-ZnO) and Trinidad Lake asphalt (TLA) was proposed. Several tests were conducted after adding nano-ZnO and TLA to SBS-modified asphalt, including a rotary film oven test (RTFOT), ultraviolet aging (UV), and the pressure aging vessel test (PAV). The conventional physical index, rheological index, and four-component content of SBS-modified asphalt before and after three aging modes were tested, and the characteristic functional groups in SBS-modified asphalt were tracked and analyzed by Fourier transform infrared spectroscopy (FTIR). The results show that the effects of aging on the rheological properties of SBS-modified asphalt are clearly reduced by adding different proportions of nano-ZnO and TLA in the process of thermal oxygen aging and the ultraviolet aging test, and the antiaging ability of SBS-modified asphalt is clearly improved. To improve the conventional performance and rheological properties of SBS-modified asphalt, an incorporation ratio of 3% nano-ZnO + 25% TLA was proposed. At the same time, the increased rate of heavy components and the change index of the colloidal instability index in the SBS-modified asphalt under the blending ratio were significantly lower than the blank SBS-modified asphalt samples in the same aging mode. FTIR spectra also showed that SBS-modified asphalt performance deterioration were mainly caused by long-term aging and ultraviolet aging. The addition of nano-ZnO and TLA effectively reduced the increase of carbonyl groups and the breakage of the C=C double bond in butadiene and synergistically improved the comprehensive aging resistance of SBS-modified asphalt. Therefore, the use of this modification is an effective method to solve the aging problem of SBS-modified 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.

Study on Performance and Microstructure of SBS Modified Asphalt during Shearing Process

2012 ◽  
Vol 178-181 ◽  
pp. 1442-1447 ◽  
Author(s):  
Ai Hong Kang ◽  
Wu Hong Zhang
Keyword(s):  
Mechanical Behavior ◽  
Softening Point ◽  
Shape Factor ◽  
Good Relationship ◽  
Modified Asphalt ◽  
Average Area ◽  
Point Total ◽  
Area Percentage ◽  
Sbs Modified Asphalt ◽  
Factor G

To explore the relationships between the performances and microstructures of modified asphalt, in the tests, one kind of basic asphalt、two kinds of modifiers and four kinds of modifiers content were selected to prepare modified asphalt. The SBS modified asphalt performances such as softening point, viscosity, Rutting Factor G*/sinδ and the corresponding microstructures with different shearing time were analyzed. The results show that different modifiers have different modification effects on the asphalt，but the change trends of performances and microstructures with the modifier content and shearing time are basically the same. It is also found that there is a good relationship between microstructure and macro performance, the average area of the modifier is closely related to the softening point, total area (or area percentage) and the shape factor of the modifier are suitable to reflect the mechanical behavior of modified asphalts.

scholarly journals Evaluating the Rheological, Chemical and Morphological Properties of SBS Modified Asphalt-Binder under Multiple Aging and Rejuvenation Cycles

2021 ◽  
Vol 11 (19) ◽  
pp. 9242
Author(s):  
Xiaobing Chen ◽  
Yunfeng Ning ◽  
Yongming Gu ◽  
Ronglong Zhao ◽  
Jinhu Tong ◽  
...  
Keyword(s):  
Asphalt Binder ◽  
Morphological Properties ◽  
Asphalt Binders ◽  
Laboratory Simulation ◽  
Fatigue Properties ◽  
Type I ◽  
Modified Asphalt ◽  
Modified Asphalt Binder ◽  
Microscopic Morphology ◽  
Sbs Modified Asphalt

To investigate the influence of multiple cycles of aging and rejuvenation on the rheological, chemical, and morphological properties of styrene–butadiene–styrene (SBS)-modified asphalt-binders, the asphalt-binders were aged using two laboratory simulation methods, namely a rolling thin film oven (RTFO) test for short-term aging and pressure aging vessel (PAV) for long-term aging. The asphalt-binders were then rejuvenated with three types of rejuvenators (Type I, II, and III) with different dosages (i.e., 6%, 10%, and 14% for the first, second, and third rejuvenation, respectively). A dynamic shear rheometer (DSR) was then used to analyze the effect of rejuvenators on the rheological properties of all the asphalt-binders. The changes in the functional groups and microscopic morphology in the process of multiple aging and rejuvenation cycles were studied using Fourier transform infrared (FTIR) and atomic force microscopy (AFM). The results indicated that the three rejuvenators could soften the stiffness and restore the microstructures of the aged asphalt-binders in the process of repeated aging and rejuvenation from DSR and AFM testing. Considering the rutting and fatigue properties, the Type I rejuvenator exhibited the potential to achieve the desired rejuvenation effects under multiple rejuvenation cycles. During the multiple aging and rejuvenation cycles, the aging resistance of SBSMA decreased gradually from the FTIR results. This inherently limited the number of repeated rejuvenation cycles. This research is conducive to promoting the application of repeated penetrating rejuvenation.

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.

Influence of SBS Dosage on the Performance of Modified Asphalt

2014 ◽  
Vol 505-506 ◽  
pp. 255-259
Author(s):  
Chang Yong Ye ◽  
Wan Yi Yang ◽  
Xi Zhang ◽  
Wei Guang Li
Keyword(s):  
Molecular Weight ◽  
Service Life ◽  
Softening Point ◽  
Production Quality ◽  
Construction Quality ◽  
Modified Asphalt ◽  
Modification Effect ◽  
Sbs Modified Asphalt

In this paper, two base asphalt types representing two oil sources and two modifiers (linear and star-shaped) are processed. This paper discusses the relation between dosage of SBS and the characteristics of SBS modified asphalt. Modified effects related to the structure and molecular weight of SBS. The modification effect of star-shaped modifier is better but the processing performance of linear modifier is better. The index of evaluating the production quality of SBS modified asphalt is proposed and the basis of controlling the construction quality of SBS modified asphalt is provided. Through the analyses of modified asphalt with different variety and different SBS dosage in conventional experiments such as penetration, ductility, softening point and the relation between the dosage of SBS and various technical performances of SBS modified asphalt is obtained. After the modified, penetration is decreased and softening point and ductility is increased, which prolonged the service life of pavement.

Experimental Study on the Formula of Recycled Rubber Power Modified Asphalt

2012 ◽  
Vol 501 ◽  
pp. 422-426
Author(s):  
Chuan Sheng Wang ◽  
Zhen Zhen Wang ◽  
Hua Zhang
Keyword(s):  
Experimental Study ◽  
Softening Point ◽  
High Performance ◽  
Orthogonal Experiment ◽  
Low Cost ◽  
Road Asphalt ◽  
Tire Rubber ◽  
Rubber Powder ◽  
Modified Asphalt ◽  
Recycled Rubber

Recycled rubber powder modified asphalt is the trend of road asphalt, and rubber power is low cost, high performance modifier. In this experiment, by analyzing the equivalent softening point and equivalent crisp point, uses orthogonal experiment to obtain the formula that made the pavement property of recycled tire rubber powder modified asphalt for optimal.

scholarly journals Laboratory Evaluation of Aging Behaviour of SBS Modified Asphalt

2017 ◽  
Vol 2017 ◽  
pp. 1-12 ◽  
Author(s):  
Jie Wang ◽  
Yongchun Qin ◽  
Songchang Huang ◽  
Jian Xu
Keyword(s):  
Particle Size ◽  
Aging Time ◽  
Aging Temperature ◽  
Softening Point ◽  
Area Ratio ◽  
Laboratory Evaluation ◽  
Modified Asphalt ◽  
Time Changes ◽  
Sbs Modified Asphalt ◽  
Particle Area

To study the effect of aging SBS modified asphalt on the performance of asphalt pavement, aging at various times and temperatures was conducted with thin film oven, and then tests were made about the penetration, softening point, ductility, viscosity, toughness, and fluorescence microscopy of modified asphalt with different aging levels. The results show that, with the increasing of aging time, the penetration and ductility of modified asphalt decrease while its softening point and viscosity increase, and the variation trend of the toughness and tenacity is related to the aging temperature; the aging dynamic model with viscosity as parameter can well characterize the aging process of modified asphalt; at microlevel, with the decreasing of SBS particle size, the uniformity of particle size is better. Analysis of macroscopic properties, microscopic characteristics, and significance shows that the SBS particle area ratio has a significant correlation with tenacity as the aging temperature changes. When the aging temperature is 163°C, the SBS particle area ratio still has a significant correlation with tenacity as the aging time changes.

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.

scholarly journals Physical and rheological properties of nano zinc oxide modified asphalt binder

2018 ◽  
Vol 250 ◽  
pp. 02004
Author(s):  
Khairul Nizam Mohd Yunus ◽  
Mohd Ezree Abdullah ◽  
Mohd Khairul Ahmad ◽  
Nurul Hidayah Mohd Kamaruddin ◽  
Haniffah Tami
Keyword(s):  
Zinc Oxide ◽  
Rheological Properties ◽  
Softening Point ◽  
Permanent Deformation ◽  
Asphalt Binder ◽  
Zinc Nitrate ◽  
Rutting Resistance ◽  
Nano Zinc Oxide ◽  
Modified Binder ◽  
Nano Zinc

The main objectives of this work were to investigate the physical and rheological properties of nano zinc oxide (NaZO) flake structure as a modifier in asphalt binder. NaZO was produced with hydrothermal method by using two precursors, which are zinc nitrate and sodium hydroxide. NaZO was mixed with virgin binder 60/70 penetration grade at 3%, 5% and 7% of asphalt binder weight, respectively. The physical properties were evaluated by conventional testing, such as penetration, softening point and viscosity. Meanwhile, the rheological property, such as rutting resistance, was measured by using a dynamic shear rheometer (DSR) for unaged and rolling thin film oven (RTFO) aged. It was observed that the penetration value was decreased and the softening point increased with increasing NaZO concentrations. In addition, the rutting resistance factor was increased for the modified binder. A comparison between the modified binder, 7% NaZO, showed a greater resistance to rutting before and after aging. Results of this study showed that the NaZO addition had increased the asphalt binder stiffness ; thus, could contribute to better resistance to permanent deformation.

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