Study on the properties of GNPs/PS and GNPs/ODA composites incorporated SBS modified asphalt after short-term and long-term aging

2020 ◽  
Vol 261 ◽  
pp. 119682 ◽  
Author(s):  
Yunhao Wei ◽  
Yu Liu ◽  
Yaseen Muhammad ◽  
Sidra Subhan ◽  
Fei Meng ◽  
...  
Keyword(s):  
Short Term ◽  
Modified Asphalt ◽  
Sbs Modified Asphalt

Conduct Research for Thermal Aging Reaction of SBS Modified Asphalt by Applications for DSR

2014 ◽  
Vol 1065-1069 ◽  
pp. 1752-1755
Author(s):  
Shuai Tuan Tian ◽  
Feng Tang
Keyword(s):  
Rheological Properties ◽  
Thermal Aging ◽  
Heavy Traffic ◽  
Fatigue Cracking ◽  
Short Term ◽  
Modified Asphalt ◽  
Different Temperatures ◽  
High Or Low Temperature ◽  
Sbs Modified Asphalt

SBS modified asphalt has good abilities to resisting pressure of high or low temperature and rutting in areas where changes of temperature is large. In our country,It is one of the important engineering materials which can solve the problem of heavy traffic on asphalt pavement and rutting in long and steep roads.In order to deeply understand the changes of rheological properties during the Thermal aging reaction of SBS modified asphalt,under different temperature conditions.regarded 90 # asphalt with CNOOC as lateral reference standard, Systematic study has been applied on the rheological properties of SBS modified asphalt and 90 # asphalt at different temperatures by using methods of DSR.The results showed that:during 28°C~34°C,with the rising of Temperature,performance of Resistance to fatigue cracking of the original modified asphalt and the original 90 # asphalt has became more and more strong.At the same temperature,the original modified asphalt’s performance of Resistance to fatigue cracking is stronger than the original 90 # asphalt’s.Long and short-term aging reactions weaken the performance of resistance to fatigue cracking of SBS modified asphalt and 90 # asphalt, and the effects of long-term weakening is more obvious.during 52°C~76°C,the anti-rutting performance of SBS modified asphalts and the 90 # original asphalts became more an more bad with the rising of Temperature.

The Application of High Content SBS Modified Asphalt Waterproof Layer in the Project of Jing-Jin-Tang Highway's Bridge Deck Maintenance

2014 ◽  
Vol 919-921 ◽  
pp. 1178-1183
Author(s):  
Hai Feng Zhang ◽  
Lian Yu Wei ◽  
Nan An
Keyword(s):  
Service Life ◽  
Production Technology ◽  
Bridge Deck ◽  
Raw Material ◽  
Safe Operation ◽  
Modified Asphalt ◽  
Long Term Follow Up ◽  
Sbs Modified Asphalt

Based on the project of Jing-Jin-Tang Highways bridge deck maintenance, this paper will study the raw material, production technology and construction control of high content SBS modified asphalt waterproof layer. According to the long-term follow-up inspection and the test data to constructed project, we could conclude that high content SBS modified asphalt waterproof layer has a good waterproof performance. It prolongs the service life of the bridge deck greatly and ensures the safe operation of the bridge.

Effect of Antioxidant Characteristic from Waste Cooking Oil in Modified Asphalt Binder

2016 ◽  
Vol 700 ◽  
pp. 197-206 ◽  
Author(s):  
Wan Nur Aifa Wan Azahar ◽  
Mastura Bujang ◽  
Ramadhansyah Putra Jaya ◽  
Mohd Rosli Hainin ◽  
Norzita Ngadi ◽  
...  
Keyword(s):  
Aging Process ◽  
Asphalt Pavement ◽  
Asphalt Binder ◽  
Waste Cooking Oil ◽  
Short Term ◽  
Aging Rate ◽  
Modified Asphalt ◽  
Cooking Oil ◽  
Modified Asphalt Binder

Aging process especially in asphalt binder material can occur throughout the life cycle of asphalt pavement starting from mixing, placement and during the service life. During this process, the more stiffer and brittle of asphalt binder is produced due to age hardening and gives an indication of initial factor of deterioration in asphalt pavement. A number of noteworthy researchers have focused on oil based modification to produce modified asphalt binder by using Waste Cooking Oil (WCO), due to the presence of natural antioxidant properties possessed in WCO. Antioxidant has played the role as an oxidative inhibition and has the potential to minimize the aging rate to occur. The aging process is conducted by separating between short term and long term aging where short term oxidative aging of binders was simulated using rolling thin film oven (RTFO) while long term aging was performed using pressure aging vessel (PAV). The laboratory evaluation was carried out to investigate the relationship between the qualities of WCO that affect the availability of antioxidant amount towards the susceptibility of aging rate by conducting Dynamic Shear Rheometer (DSR). The result from rheological studies demonstrated that the lowest Aging Index (AI) is presented as 2.14, 2.18 and 1.79 for replacement by using WCO in December sample at concentration of 3%, 4% and 5% for short term aging while AI at 3% = 5.17 and 5% = 7.22 for long term aging. Therefore, the high quality of oil represented by WCO in December sample has indicated the high availability of antioxidant content that can minimize the aging susceptibility in the asphalt binder modified by WCO.

Effect of Aging on the Low-Temperature Properties of Asphalt Mixture

2013 ◽  
Vol 438-439 ◽  
pp. 383-386
Author(s):  
Ning Li Li ◽  
Xin Po Zhao ◽  
Cai Li Zhang ◽  
Qing Yi Xiao ◽  
Hu Hui Li
Keyword(s):  
Low Temperature ◽  
Asphalt Mixture ◽  
Asphalt Mixtures ◽  
Asphalt Pavements ◽  
Flexural Test ◽  
Short Term ◽  
Modified Asphalt ◽  
Aging Test ◽  
Cracking Performance

This article studies the low-temperature anti-cracking properties of plain asphalt mixtures and rubber-modified asphalt mixtures at different aging condition. Laboratory flexural test was conducted on the beam specimens of plain asphalt mixtures and rubber-modified asphalt mixtures. Experiment results indicate that rubber-modified asphalt mixtures have superior low-temperature anti-cracking performance than that of plain asphalt mixtures. Compared with the short term oven aging test, the long term oven aging test has more significant effect on the low-temperature anti-cracking of the mixture. In order to better represent the low-temperature anti-cracking of in-service aging asphalt pavement, the long term oven aging test should be used to appraise the low-temperature anti-cracking of asphalt pavements in china.

Application of Nonlinear Differential Dynamic Model to Evaluate Long-Term Aging Behavior of SBS Modified Asphalt

2013 ◽  
Vol 710 ◽  
pp. 376-381 ◽  
Author(s):  
Yue Qin Hou ◽  
Xiao Ping Ji ◽  
Xue Zhang Tan
Keyword(s):  
Dynamic Model ◽  
Softening Point ◽  
Rate Equations ◽  
Aging Behavior ◽  
Aging Rate ◽  
Modified Asphalt ◽  
Aging Test ◽  
Two Parameters ◽  
Sbs Modified Asphalt

In order to study the long-term aging behavior of SBS modified asphalt, a nonlinear differential dynamic model was developed and the aging tests with rolling thin film oven test (RTFOT) for SBS modified asphalt were carried out. The dynamic model was developed referring to the population developing model with two parameters, namely average aging rate and aging ratio. And the differentiation of the dynamic model was the aging rate equation with which can calculate the aging rate at any time. The aging tests with RTFOT for SBS modified asphalt at different times were carried out and the penetration, ductility at 5°C, softening point and viscosity at 135°C were measured after RTFOT. With the rest results, the two parameters of nonlinear differential dynamic model of above four indexes were determined, and further the aging rate equations were deduced. The research results show that the nonlinear differential dynamic model can exactly describe the varying behavior of penetration, ductility, softening point and viscosity of SBS modified asphalt after RTFOT aging test with different time. The aging rate reach maximum value at the beginning and becomes smaller and smaller as the time goes.

scholarly journals The Effect of Addition of Antioxidant 1,2-dihydro-2,2,4-trimethyl-quinoline on Characteristics of Crepe Rubber Modified Asphalt in Short Term Aging and Long Term Aging Conditions

2020 ◽  
Vol 10 (20) ◽  
pp. 7236
Author(s):  
Bahruddin Ibrahim ◽  
Arya Wiranata ◽  
Alfian Malik
Keyword(s):  
Weight Loss ◽  
Natural Rubber ◽  
Softening Point ◽  
Total Sample ◽  
Short Term ◽  
Modified Asphalt ◽  
Before And After ◽  
Aging Conditions ◽  
Asphalt Performance

The use of natural rubber to resist bitumen is usually prone to degradation and aging. One method to overcome this problem is the addition of antioxidants. This study aims to determine the effect of the addition of antioxidants 1,2-dihydro-2,2,4-trimethyl-quinoline (TMQ) on natural rubber modified asphalt crepe rubber and its performance in short-term and long-term aging conditions. The modified rubber asphalt mixture’s manufacture begins by melting the crepe rubber at 200 °C before being mixed in asphalt at 165 °C. Addition of antioxidant TMQ during the stirring process of the mixture of asphalt and melted rubber. The crepe rubber content was 8, 10, and 12% w/w, while the TMQ content was 1, 2, and 3% w/w of the total sample weight. The modified asphalt samples’ characterization included penetration, softening point, weight loss after a rolling thin film oven test (RTFOT), penetration after RTFOT, and Marshall test. Review of the performance of asphalt under short-term aging conditions using a dynamic shear rheometer (DSR). Evaluation of asphalt performance under long-term aging conditions using Fourier-transform infrared spectroscopy (FTIR). The results showed that the fact that the best-modified asphalt product was the addition of 10% crepe rubber and 2% TMQ. The best-modified asphalt characteristics have penetration 68.70 dmm, softening point 55.45 °C, weight loss only 0.0579%, penetration after RTFOT 59.60, Marshall stability 1403.96 kg with optimum asphalt content of 5.50%, and rutting factor (G*/Sinδ) 6.91 kPa and 16.1 kPa before and after RTFOT. Overall, the modified crepe rubber asphalt can improve the performance of the asphalt in terms of durability. Simultaneously, the antioxidant TMQ works very well in increasing the resistance of bitumen to aging in the conditions of short-term aging and long-term aging.

Short-Term Ageing Influence on the Creep and Recovery Characteristics of Asphalt Binders

2013 ◽  
Vol 275-277 ◽  
pp. 2045-2050 ◽  
Author(s):  
Chao Wang ◽  
Jin Xi Zhang ◽  
Ping Ping Song
Keyword(s):  
Stress Level ◽  
High Stress ◽  
Asphalt Binders ◽  
Short Term ◽  
Modified Asphalt ◽  
Creep And Recovery ◽  
Modified Binder ◽  
High Stress Level ◽  
Almost All ◽  
Sbs Modified Asphalt

This paper focused on the short-term ageing influence on the creep and recovery characteristics of neat and SBS modified asphalt binders at two different stress levels. Using the MSCR test conducted on dynamic shear rheometer (DSR), it can be concluded that the RTFOT short-term ageing process was observed to decrease the nonrecoverable compliance (Jnr) and increase the average recovery percent (R) for almost all binders, which was more notable at a high stress level especially for SBS modified binders. Additionally, stress level applied in test played a key role in evaluating the viscoelastic properties of different asphalt binders, and SBS modified binder exhibited more stress sensitive than neat binders.

scholarly journals MODIFIED ASPHALT MIXTURES RESISTANCE TO PERMANENT DEFORMATIONS

2007 ◽  
Vol 13 (4) ◽  
pp. 307-315 ◽  
Author(s):  
Piotr Radziszewski
Keyword(s):  
Asphalt Mixture ◽  
Asphalt Mixtures ◽  
Test Results ◽  
Short Term ◽  
Porous Asphalt ◽  
Modified Asphalt ◽  
Road Pavement ◽  
In Situ Conditions ◽  
Modified Binders

Permanent deformations, primarily in the form of ruts, are one of the basic asphalt pavement damages impairing its service properties. Application of appropriate asphalt mixtures and binder modification are effective methods for improving asphalt courses resistance. While being manufactured, stored, fitted into a road pavement and during long term service, bitumen binders and asphalt mixtures are subject to continuous unfavourable ageing processes during which pavement courses characteristics change considerably, resistance to permanent deformations being among them. This article presents rut and dynamic creep test results of concrete, SMA (stone mastic asphalt), MNU (thin courses of non‐continuous grain mixtures), Superpave mixture and porous asphalt mixture of two air void content percentages: 15 %, 20 %. Asphalt concrete mixtures, MNU's and porous asphalt mixtures contained elastomer, plastomer and fine rubber modified binders. Samples for laboratory rut tests were made by slab compaction because this method, as the author's previous research had shown, was the closest to ‘in‐situ’ conditions. Resistance to permanent deformations of the examined specimens was evaluated before aging, after technological aging (short term ageing) and after service ageing (long‐term ageing). The test results show that resistance to permanent deformations depends on the kind of asphalt mixture and binder applied. Concrete asphalts with fine rubber modified bitumens and concrete asphalts with 7 % polymer modified binders as well as SMA's and Superpave mixtures with unmodified binders appeared to be most resistant to permanent deformations after a long‐term laboratory ageing. It was proved that the overall evaluation of resistance to permanent deformations could be obtained by rut and creep testing of asphalt mixtures exposed to short‐ and long‐term ageing. Simultaneous determining 4 parameters: maximum rut depth after short‐term ageing, rutting coefficient after operational ageing, stiffness creeping modulus after long‐term ageing and cumulated deformation after short‐term ageing, facilitates full characteristics of modified asphalt mixes designed to be built in the wearing course of a road pavement.

scholarly journals Effect of Weather Aging on Viscoelasticity and Fatigue Performance of Asphalt Mastic

Materials ◽  
2021 ◽  
Vol 14 (20) ◽  
pp. 6163
Author(s):  
Gang Xu ◽  
Yixin Zhou ◽  
Yu Zhu ◽  
Rui Wang ◽  
Xianhua Chen
Keyword(s):  
Fatigue Life ◽  
High Strain ◽  
Asphalt Mixture ◽  
Strain Level ◽  
Fatigue Performance ◽  
Modified Asphalt ◽  
Asphalt Mastic ◽  
Sbs Modified Asphalt ◽  
The Impact

The long-term effect of climate factors, such as sunlight, oxygen, and water, leads to the performance degradation of the asphalt mastic, which is the binding part in the asphalt mixture. It is not conducive to satisfy the long-term performance requirements of long-life asphalt pavement. In this study, five kinds of base asphalt mastic and styrene-butadiene-styrene (SBS) modified asphalt mastic were prepared with the filler-asphalt ratio of 0.6, 0.8, 1.0, 1.2, and 1.4. The indoor simulated weather aging tests were carried out considering multi-factors including sunlight, oxygen, and water. The master curves of the complex shear modulus and phase angle of the asphalt mastic with different aging degrees were obtained by the frequency sweep test. The curves of fatigue damage characteristics and fatigue life were fitted based on the viscoelastic continuum damage (VECD) model. The influence of weather aging on the viscoelasticity and fatigue performance of asphalt mastic were analyzed. Results indicated that the effect of weather aging increases the elastic component and decreases the viscous component. The fatigue performance of SBS modified asphalt mastic was better than that of base asphalt mastic. As the aging degree deepens, the brittle failure characteristics of asphalt mastic with a higher filler–asphalt ratio were more obvious. The base asphalt mastic becomes more sensitive to the strain level due to weather aging, and its fatigue life increased under the low strain loading and decreased under the high strain loading. The fatigue performance of SBS modified asphalt mastic was less sensitive to the strain level. The fatigue life reduced after aging under low and high strain load. Taking the impact of weather aging on the fatigue performance into consideration, the optimal filler–asphalt ratios of the base asphalt mastic SBS modified asphalt mastic are 1.0 and 1.2, respectively.

Short-Term and Long-Term Aging Behavior of Rubber Modified Asphalt Paving Mixture

1996 ◽  
Vol 1530 (1) ◽  
pp. 11-17 ◽  
Author(s):  
Robert Y. Liang ◽  
Suckhong Lee
Keyword(s):  
Complex Modulus ◽  
Resilient Modulus ◽  
Crumb Rubber ◽  
Test Results ◽  
Aging Behavior ◽  
Short Term ◽  
Modified Asphalt ◽  
Modified Binders ◽  
Asphalt Paving

Aging of asphalt has been an important subject area that has received extensive studies in recent years. Test results of short-term and long-term aging behavior of crumb rubber modifier (CRM) modified asphalt paving materials are presented. Eighteen combinations of CRM modified binders in terms of CRM size, CRM content, and base asphalt cement grade were studied by Brookfield viscometer test and dynamic shear rheometer test. The short-term aged binders were prepared using thin film oven test. Viscosity was measured at 350°F in the Brookfield thermosel after mixing at 375°F for 2 hr. The test results showed that the size and percentage of CRM affected the viscosity development in the modified binders: the smaller the CRM size and the higher the CRM content, the higher the viscosity measured after 2-hr reaction at 375°F. Short-term aging exerted more viscosity increase in the CRM modified binders than in the unmodified binders. Modified binders showed less weight loss than unmodified binders. The modified binders showed higher complex modulus G* than unmodified. Short-term aging increased G*, with modified binders exhibiting higher increase. The Marshall mix design yielded various CRM modified mixes. The result of indirect tensile strength tests showed that short-term and long-term aging increased the measured tensile strengths. The resilient modulus test results, in general, supported the general understanding that aging tended to increase resilient modulus.

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