Experimental Study on Polyphosphoric Acid (PPA) Modified Asphalt Binders

2010 ◽  
Vol 152-153 ◽  
pp. 288-294 ◽  
Author(s):  
Wei Dong Cao ◽  
Shu Tang Liu ◽  
Hong Lu Mao
Keyword(s):  
Low Temperature ◽  
Softening Point ◽  
Asphalt Binder ◽  
Asphalt Binders ◽  
Modified Asphalt ◽  
Temperature Performance ◽  
Point Test ◽  
Low Temperature Performance ◽  
Four Levels ◽  
Temperature Susceptibility

Polyphosphric acid (PPA) modified asphalt binders were produced in the laboratory using one base asphalt and four levels of PPA contents (0.6%, 1.0%, 1.5% and 2.0% by weight of base asphalt). Penetration test, softening point test, rotation viscosity test, creep test with bending beam rheometer (BBR) and four components test were carried out to study the performance of PPA modified asphalt binders and possible modification mechanism. The results indicate that the high-temperature performance of PPA modified asphalt binders are obviously improved and temperature susceptibility are decreased, but the low-temperature performance slightly decline compared with base asphalt. The PPA content has a very significant effect on softening point whereas it has no significant influence on low-temperature performance according to variance analysis (ANOVA). Finally, four components test reveals that the primary modification mechanism of PPA is the change of chemical composition of asphalt binder.

scholarly journals Evaluation of Low- and Intermediate-Temperature Performance of Bio Oil-Modified Asphalt Binders

2021 ◽  
Vol 13 (7) ◽  
pp. 4039
Author(s):  
Sara A. Alattieh ◽  
Ghazi G. Al-Khateeb ◽  
Waleed Zeiada
Keyword(s):  
Low Temperature ◽  
Asphalt Binder ◽  
Fatigue Cracking ◽  
Asphalt Binders ◽  
Tensile Stresses ◽  
Modified Asphalt ◽  
Temperature Performance ◽  
Bio Oil ◽  
Low Temperature Cracking ◽  
Low Temperature Performance

Fatigue cracking and low-temperature cracking are two major distresses that occur in asphalt pavements. Fatigue cracking is a load-associated distress caused by the tensile stresses at the bottom/top of the asphalt concrete (AC) layer due to repeated traffic loading. On the other hand, low-temperature cracking occurs when tensile stresses built up with in the AC layer at low temperatures exceed the tensile strength of that layer. In this study, the performance of date seeds oil bio-modified asphalt binders (DSO-BMB) is evaluated against fatigue and low-temperature cracking. The DSO-BMBs are prepared using volume ratios of 1.5, 2.5, 3.5, 4.5, and 5.5% date seeds oil-to-asphalt binder. The base asphalt binder used in the study is a 60/70-penetration grade with a Superpave performance grade (PG) of PG 64–16. The dynamic shear rheometer (DSR) standard test was used to assess the fatigue performance of the bio-modified binders (BMBs), while the bending beam rheometer (BBR) test was used to test the BMBs for low-temperature performance. In addition, the DSR linear amplitude sweep (LAS) test was used to evaluate the fatigue tolerance behavior of the DSO-BMBs. The analysis and results of the study showed that the bio-oil enhanced the low-temperature performance. The low PG grade improved from −16 °C for the control asphalt binder to −28 °C for the BMB. Additionally, the fatigue resistance of the BMBs was improved as illustrated by the damage–characteristic curves of the modified asphalt binders from the visco-elastic continuum damage (VECD) analysis and the increase in the number of cycles to fatigue failure (Nf).

scholarly journals Study on Epoxy Resin-Modified Asphalt Binders with Improved Low-Temperature Performance

2021 ◽  
Vol 2021 ◽  
pp. 1-15
Author(s):  
Zhiqi Luo ◽  
Tao Liu ◽  
Yintan Wu ◽  
Hongwei Yuan ◽  
Guoping Qian ◽  
...  
Keyword(s):  
Low Temperature ◽  
Epoxy Resin ◽  
Asphalt Binder ◽  
Control Sample ◽  
Asphalt Binders ◽  
Medium Temperature ◽  
Modified Asphalt ◽  
Temperature Performance ◽  
Low Temperature Performance ◽  
Modified Epoxy

Epoxy resin-modified asphalt binder (ERMAB) has been wildly used in the pavement of steel bridges, while the improvement on its low temperature is still a big challenge to researchers. This paper tries to improve the low-temperature performance of ERMAB by optimizing the modifier, epoxy resin. Firstly, three epoxy resins and three amine curing agents were prepared and used for the modification of asphalt binders. Secondly, the formula and prepared methods of ERMABs were optimized and determined through compatibility, viscosity growth rate, and tensile tests. Thirdly, an overall comparison on the phase structure, thermal stability, low-temperature performance, temperature and frequency dependence, and fatigue performance of prepared ERMABs and control sample were made. Results show that polyurethane-modified epoxy resin or dimer acid-modified epoxy resin, with a suitable curing agent, can significantly improve the low-temperature performance of ERMAB, and the curing time meets the construction requirements. Compared with the control sample, the two ERMABs have basically the same rheological properties at medium temperature, but slightly worse high-temperature performance and fatigue resistance. The significance of this paper lies in proposing a feasible way to improve the low-temperature performance of ERMAB.

scholarly journals Effect of Recycled Shell Waste as a Modifier on the High- and Low-Temperature Rheological Properties of Asphalt

2021 ◽  
Vol 13 (18) ◽  
pp. 10271
Author(s):  
Yuchen Guo ◽  
Xuancang Wang ◽  
Guanyu Ji ◽  
Yi Zhang ◽  
Hao Su ◽  
...  
Keyword(s):  
High Temperature ◽  
Low Temperature ◽  
Rheological Properties ◽  
Low Temperatures ◽  
High Speed ◽  
Permanent Deformation ◽  
Asphalt Binder ◽  
Asphalt Binders ◽  
Modified Asphalt ◽  
Temperature Performance

The deteriorating ecological environment and the concept of sustainable development have highlighted the importance of waste reuse. This article investigates the performance changes resulting from the incorporation of shellac into asphalt binders. Seashell powder-modified asphalt was prepared with 5%, 10%, and 15% admixture using the high-speed shear method. The microstructure of the seashell powder was observed by scanning electron microscope test (SEM); the physical-phase analysis of the seashell powder was carried out using an X-ray diffraction (XRD) test; the surface characteristics and pore structure of shellac were analyzed by the specific surface area Brunauer-Emmett-Teller (BET) test; and Fourier infrared spectroscopy (FTIR) qualitatively analyzed the composition and changes of functional groups of seashell powder-modified asphalt. The conventional performance index of seashell powder asphalt was analyzed by penetration, softening point, and ductility (5 °C) tests; the effect of seashell powder on asphalt binder was studied using a dynamic shear rheometer (DSR) and bending beam rheometer (BBR) at high and low temperatures, respectively. The results indicate the following: seashell powder is a coarse, porous, and angular CaCO3 bio-material; seashell powder and the asphalt binder represent a stable physical mixture of modified properties; seashell powder improves the consistency, hardness, and high-temperature performance of the asphalt binder but weakens the low-temperature performance of it; seashell powder enhances the elasticity, recovery performance, and permanent deformation resistance of asphalt binders and improves high-temperature rheological properties; finally, seashell powder has a minimal effect on the crack resistance of asphalt binders at very low temperatures. In summary, the use of waste seashells for recycling as bio-modifiers for asphalt binders is a practical approach.

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.

Low-Temperature Performance of Toner-Modified Asphalt Binder

2019 ◽  
Vol 145 (3) ◽  
pp. 04019022 ◽  
Author(s):  
Mohammad Ali Notani ◽  
Fereidoon Moghadas Nejad ◽  
Ellie H. Fini ◽  
Pouria Hajikarimi
Keyword(s):  
Low Temperature ◽  
Asphalt Binder ◽  
Modified Asphalt ◽  
Temperature Performance ◽  
Modified Asphalt Binder ◽  
Low Temperature Performance

Research on Performance of the Modified Asphalt by Diatomite-Cellulose Composite

2010 ◽  
Vol 158 ◽  
pp. 211-218 ◽  
Author(s):  
Yong Sheng Sun ◽  
Xiao Long Chen ◽  
Yue Xin Han ◽  
Bin Zhang
Keyword(s):  
High Temperature ◽  
Low Temperature ◽  
Synergistic Effect ◽  
Ash Content ◽  
Modified Asphalt ◽  
Temperature Performance ◽  
Low Temperature Performance ◽  
Temperature Susceptibility ◽  
Cellulose Composite ◽  
Better Than

The diatomite-cellulose composite (DCC) was used to modified asphalt for pavement in the study, and then the high temperature performance, low temperature performance and temperature susceptibility of asphalt were studied. The results showed that these performances of asphalt were all improved after modified by DCC, and the performance of modified asphalt significantly associated with the ash content of DCC, and H-3 DCC was the best. The performance of modified asphalt by DCC was obviously better than using diatomite and cellulose directly. The improving properties of modified asphalt by DCC were caused by synergistic effect of diatomite and cellulose.

scholarly journals Assessment of temperature susceptibility for rubber granulate modified road asphalt binders considering impact of aging

2018 ◽  
Vol 222 ◽  
pp. 01016
Author(s):  
Mieczysław Słowik ◽  
Damian Wiśniewski ◽  
Marcin Bilski ◽  
Marta Mielczarek
Keyword(s):  
Phase Angle ◽  
Softening Point ◽  
Positive Impact ◽  
Asphalt Binder ◽  
Positive Influence ◽  
Asphalt Binders ◽  
Dynamic Shear Modulus ◽  
Road Asphalt ◽  
Modified Asphalt ◽  
Temperature Susceptibility

The article presents the results of research on temperature sensitivity of ground rubber modified asphalt binders. The tests were performed for 50/70 penetration grade road bitumen and two kinds of granulated rubber: activated and inactivated. Such parameters of asphalt binders as: penetration, softening point, dynamic shear modulus and phase angle have been determined and on this basis the temperature susceptibility of the reference bitumen and asphalt binders modified by activated and inactivated rubber have been determined. All the tests were carried out for three observation levels: without aging and after aging simulations carried out by RTFOT and PAV methods. The tests revealed that addition of granulated rubber has a positive influence on asphalt binder properties, even after the aging process, causing an increase in the softening point and a decrease in penetration and the phase angle of asphalt binder. Asphalt binders obtained in result of modification by addition of rubber show smaller temperature susceptibility than the reference bitumen (without addition of rubber). Also, a positive impact of aging on the temperature susceptibility was observed for the investigated binders.

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