Dynamical characteristics of asphalt binder containing Polyphosphoric acid modifiers

The paper evaluate asphalt modified effects by PPA.The relationship of performance is compared between SBS modified asphalt and modified asphalt with different proportion SBS and different proportion PPA by tests such as the Penetration, Softening point, Ductility, viscosity and performance index of after aging RTFOT and after aging PAV. Results showed that 4%SBS and 1.5% PPA modified asphalt binder provided road performance as well as 5%SBS only binder. It is remarkable effect for improving road performance of PPA modified asphalt on high temperature, anti-aging, storage stability.

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Effect of Aging on the Rheological and Molecular Weight Distribution of Asphalt Binder Treated with Polyphosphoric Acid

Advances in Materials Science and Engineering ◽

10.1155/2021/9992530 ◽

2021 ◽

Vol 2021 ◽

pp. 1-13

Author(s):

Tao Ma ◽

Kai Yang ◽

Rui Li ◽

Jiujian Shen

Keyword(s):

Molecular Weight ◽

Molecular Weight Distribution ◽

Weight Distribution ◽

Polyphosphoric Acid ◽

Asphalt Binder ◽

Chemical Properties ◽

Gel Permeation Chromatography ◽

Weight Analysis ◽

Styrene Butadiene

Asphalt binder behaves as a viscoelastic material and its inherit performance is dominated by rheological and chemical properties. Aging of asphalt binder is a prominent distress for long-term in-service asphalt pavement. In this work, the effect of aging on base asphalt modified by polyphosphoric acid (PPA) has been investigated. For the objective, virgin asphalt binder was modified by various dosages of PPA, styrene-butadiene-styrene (SBS), and PPA/SBS compound modification. The short- and long-term aging processes were simulated by Rolling Thin-Film Oven Test (RTFOT) and Pressure Aging Vessel (PAV) procedure. Rheological property of five aged modified binders was evaluated by the Dynamic Shear Rheometer (DSR). Meanwhile, gel permeation chromatography (GPC) was conducted to measure the molecular weight distribution and dispersion coefficient during the aging process. The high-temperature stiffness of PPA polymer binders is slightly higher than that of SBS and PPA/SBS compound modified asphalts. The aging ratio and molecular weight analysis verify the lower thermal-oxidative susceptibility of PPA/SBS compound modified asphalts. This study offers an understanding for the promotion and application of PPA modifier.

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Laboratory performance of warm mix asphalt binder containing polyphosphoric acid

Construction and Building Materials ◽

10.1016/j.conbuildmat.2015.12.126 ◽

2016 ◽

Vol 106 ◽

pp. 218-227 ◽

Cited By ~ 34

Author(s):

Jun Liu ◽

Kezhen Yan ◽

Lingyun You ◽

Dongdong Ge ◽

Zexing Wang

Keyword(s):

Polyphosphoric Acid ◽

Asphalt Binder ◽

Warm Mix Asphalt ◽

Laboratory Performance

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Effects of Amorphous Poly Alpha Olefin (APAO) and Polyphosphoric Acid (PPA) on the Rheological Properties, Compatibility and Stability of Asphalt Binder

Materials ◽

10.3390/ma14092458 ◽

2021 ◽

Vol 14 (9) ◽

pp. 2458

Author(s):

Xiaoguang Pei ◽

Weiyu Fan

Keyword(s):

Temperature Sensitivity ◽

Polyphosphoric Acid ◽

Storage Stability ◽

Asphalt Binder ◽

Production Costs ◽

Weight Percentage ◽

Modified Asphalt ◽

Alpha Olefin ◽

Modified Asphalt Binder ◽

High Production

High production costs and poor storage stability have become important constraints in the manufacture of modified asphalt binder. To simplify the production process and reduce the production cost, amorphous poly alpha olefin (APAO) and polyphosphoric acid (PPA) were applied to prepare highly stable modified asphalt binder. The influence of APAO/PPA on the temperature sensitivity, rheological property, storage stability, compatibility and microstructure of neat binder were studied by rotational viscosity (RV), dynamic shear rheometer (DSR), bending beam rheometer (BBR) and Fourier transform infrared (FTIR) spectroscopy. The results show that the incorporation of APAO/PPA reduced the temperature sensitivity of neat binder. The combined effect of APAO/PPA contributed to the improvement in deformation resistance, which was evidenced by the increase in failure temperature and percent recovery. However, the compound modification of APAO/PPA decreased the binder’s low-temperature performance. APAO strengthened the fatigue resistance of the binder, while PPA reduced the anti-fatigue performance. Composite modified asphalt binder with superior storage stability could be prepared, which was confirmed by the desired Cole–Cole plots and fluorescence imaging. Furthermore, chemical and physical reactions occurred during the APAO/PPA modification process. Overall, 2 wt.% (weight percentage) APAO and 1.5 wt.% PPA are recommended for the production of modified asphalt binder with remarkable rheological performance and storage stability.

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Using Polyphosphoric Acid and Sulfur to Improve Storage Stability, Aging, and Rheological Properties of High-Density Polyethylene–Modified Asphalt Binder

Journal of Testing and Evaluation ◽

10.1520/jte20190804 ◽

2021 ◽

Vol 50 (1) ◽

pp. 20190804

Author(s):

Roozbeh Zarroodi ◽

Koorosh Naderi ◽

Mehdi Moazami Goodarzi ◽

Hossein Nazari ◽

Fereidoon Moghadas Nejad

Keyword(s):

Rheological Properties ◽

High Density Polyethylene ◽

Polyphosphoric Acid ◽

Storage Stability ◽

Asphalt Binder ◽

High Density ◽

Modified Asphalt ◽

Modified Asphalt Binder

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Experimental Research on Crumb Rubber and Polyphosphoric Acid Composite Modified Asphalt Binders

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.174-177.1579 ◽

2012 ◽

Vol 174-177 ◽

pp. 1579-1583 ◽

Cited By ~ 2

Author(s):

Wei Dong Cao

Keyword(s):

Polyphosphoric Acid ◽

Asphalt Binder ◽

Crumb Rubber ◽

Orthogonal Test ◽

Asphalt Binders ◽

Experimental Program ◽

Test Design ◽

Particle Sizes ◽

Modified Asphalt ◽

Orthogonal Test Design

In order to research the properties of crumb rubber (CR) and polyphosphoric acid (PPA) composite modified asphalt binders, an orthogonal test design is employed to arrange the experimental program. Three particle sizes of CR, three contents of CR and PPA were representatively selected as three influencing factors and levels. A total of nine composite modified asphalt binders were produced in laboratory and the conventional penetration grading indexes including penetration, softening point and ductility were conduced. The results indicate that the properties of composite modified asphalt binders are improved not only at high temperatures but also at low temperatures compared to the base asphalt binder. Based on variance analysis, the optimal proportion of CR and PPA composite modified asphalt is recommended.

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