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

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

The Performance Evaluation of Modified Asphalt by Polyphosphoric Acid and SBS

2014 ◽  
Vol 898 ◽  
pp. 350-354 ◽  
Author(s):  
Yao Dong Wu
Keyword(s):  
Polyphosphoric Acid ◽  
Storage Stability ◽  
Asphalt Binder ◽  
Remarkable Effect ◽  
Modified Asphalt ◽  
Modified Asphalt Binder ◽  
Road Performance ◽  
And Performance ◽  
Relationship Of ◽  
Sbs Modified Asphalt

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.

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

Materials ◽  
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.

RHEOLOGICAL BEHAVIOUR OF COCONUT SHELL POWDER MODIFIED ASPHALT BINDER

2016 ◽  
Vol 78 (7-3) ◽  
Author(s):  
Rosnawati Buhari ◽  
Nur Fareesya Zabidi ◽  
Mohd Ezree Abdullah ◽  
Siti Khatijah Abu Bakar ◽  
Nurul Hidayah Mohd Kamarudin
Keyword(s):  
Rheological Properties ◽  
Softening Point ◽  
Asphalt Binder ◽  
Rheological Behaviour ◽  
Coconut Shell ◽  
Modified Asphalt ◽  
Modified Asphalt Binder ◽  
Modified Binder ◽  
Coconut Shell Powder ◽  
Shell Powder

The objectives of this study were to determine the blending parameters of coconut shell powder (CSP) modified asphalt binder and to evaluate the rheological properties of CSP modified asphalt binder. CSP of 2%, 4%, 6%, 8% and 10% by weight of asphalt have been incorporated into an unaged 80/100 asphalt mix in order to improve its performance. The influence of the additives on the physical and rheological properties was evaluated with penetration test, softening point, storage stability, dynamic shear rheometer test (DSR), and Field Emission Scanning Electron Microscope (FESEM). The aging of asphalt binders was simulated in a laboratory by using Rotational Thin Film Oven (RTFO). The results showed that the addition of CSP into virgin binder was decreasing the penetration value and increasing the softening point temperature compared to the original binder. On the rheological effect, for unaged modified binder, higher CSP resulted higher G*/sin δ especially at lower temperature compared to the unaged control binder. Besides, for the aged modified binder, stiffness was lower than the control aged binder for all temperature.

Influence of Carbon Black on Storage Stability of HDPE-SBS Modified Asphalt

2011 ◽  
Vol 374-377 ◽  
pp. 1409-1413
Author(s):  
Xiao Wei Wu ◽  
Dong Wei Cao ◽  
Hai Yan Zhang
Keyword(s):  
Composite Material ◽  
Carbon Black ◽  
High Density Polyethylene ◽  
Storage Stability ◽  
High Density ◽  
Modified Asphalt ◽  
Stable Mechanism ◽  
The Difference ◽  
Styrene Butadiene ◽  
Sbs Modified Asphalt

In order to avoid the phase separation of the high density-polyethylene modified asphalt, a composite material modifier was prepared in the melt blending process with High density-Polyethylene (HDPE) and Styrene-butadiene-styrene (SBS) and a filler of Carbon black (CB). The storage stability of composite material (HDPE-SBS) modified asphalt was investigated by hot storage stability test and optical microscopic observation. The storage-stable mechanism of HDPE-SBS modified asphalt was analyzed also. The experimental results indicated that the difference of the softening point after storing at high temperature for 48h was very small. Micrographs of HDPE-SBS modified asphalt demonstrated that HDPE-SBS composite modifier particles dispersed uniformly and compactly and there were no obvious phase separations in the modified asphalt within a certain CB content range.

Thermal and rheological properties of nanoparticle modified asphalt binder at low and intermediate temperature range

2017 ◽  
Vol 35 (7) ◽  
pp. 641-646 ◽  
Author(s):  
Fereidoon Moghadas Nejad ◽  
Hossein Nazari ◽  
Koorosh Naderi ◽  
Fariba Karimiyan Khosroshahi ◽  
Mostafa Hatefi Oskuei
Keyword(s):  
Rheological Properties ◽  
Asphalt Binder ◽  
Intermediate Temperature ◽  
Modified Asphalt ◽  
Temperature Range ◽  
Intermediate Temperature Range ◽  
Modified Asphalt Binder

Rheological properties and chemical characterisation of reacted and activated rubber modified asphalt binder

2020 ◽  
Vol 21 (sup1) ◽  
pp. S140-S154 ◽  
Author(s):  
Siyu Chen ◽  
Dongdong Ge ◽  
Fangyuan Gong ◽  
Zhanping You ◽  
Aboelkasim Diab ◽  
...  
Keyword(s):  
Rheological Properties ◽  
Asphalt Binder ◽  
Modified Asphalt ◽  
Modified Asphalt Binder

scholarly journals The Effect of Activation Method of Rubber on the Performance of Modified Asphalt Binder

Materials ◽  
2020 ◽  
Vol 13 (17) ◽  
pp. 3679
Author(s):  
Juan Xie ◽  
Yongning Zhang ◽  
Yueming Yang ◽  
Yunlong Ma ◽  
Jing Li ◽  
...  
Keyword(s):  
Chemical Reaction ◽  
Storage Stability ◽  
Rapid Development ◽  
Asphalt Binder ◽  
Polyamide 6 ◽  
Crumb Rubber ◽  
Activation Method ◽  
Modified Asphalt ◽  
Before And After ◽  
Modified Asphalt Binder

Poor storage stability is a key problem restricting the rapid development and wide application of rubber-modified asphalt binder, and activation of rubber has shown good prospects to solve this problem. In this study, two activation methods, coating by polyamide 6 and grafting by acrylamide, were introduced to treat crumb rubber. Then the activated rubber was added to base asphalt binder to prepare modified asphalt binder. The chemical structure and morphology of rubber powder before and after activation and of asphalt binder before and after modification were characterized by Fourier transformation infrared (FTIR) spectroscopy and scanning electron microscopy (SEM). The conventional and rheological properties and storage stability were analyzed to reveal the influence of activation method on the performance of asphalt binder. The results showed that after being activated, the surface of the rubber is loose and rough. A chemical reaction did not occur during activation by polyamide but occurred during activation by acrylamide. The activation of the rubber effectively improved the high- and low-temperature performance, and the softening difference decreased by 79.8%. This is because the interaction between rubber and asphalt binder was enhanced through activation of rubber, and grafting activation had better effect due to the chemical reaction between the basic amide groups of acrylamide and acid groups of asphalt binder.

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