The Performance and Mechanism of Waste Tire Crumb Rubber Modified Asphalt

2011 ◽  
Vol 99-100 ◽  
pp. 1365-1369
Author(s):  
Yan Chun Li ◽  
Pan Zhang ◽  
Rui Lv
Keyword(s):  
Performance Improvement ◽  
Crumb Rubber ◽  
Pavement Performance ◽  
Test Results ◽  
Rubber Mixture ◽  
Tire Rubber ◽  
Modified Asphalt ◽  
Waste Tire ◽  
Asphalt Rubber ◽  
Waste Tire Rubber

Crumb rubber modified asphalt can not only improve asphalt pavement performance, but also can achieve the waste re-use, further study on the crumb rubber modified asphalt is very important. This paper mainly discusses the action mechanism of waste tire rubber modified asphalt, and analysis the performance improvement of the asphalt when it is mixed with the waste tire rubber. By analyzing the test results of asphalt’s conventional, we find out that mixed the waste tire rubber in asphalt is the resulting in the improvement of asphalt’s performance. Lastly, it discusses waste tire rubber modified asphalt advantages and the prospects of development. Overall, popularize and application the asphalt-rubber mixture is valuable.

scholarly journals Multiscale mechanisms of asphalt performance enhancement by crumbed waste tire rubber: Insight from molecular dynamics simulation

2021 ◽  
Author(s):  
Kui Hu ◽  
Caihua Yu ◽  
Yujing Chen ◽  
Wei Li ◽  
Chen Guixiang ◽  
...  
Keyword(s):  
Molecular Dynamics ◽  
High Temperature ◽  
Binding Energy ◽  
Dynamics Simulation ◽  
Tire Rubber ◽  
Modified Asphalt ◽  
Waste Tire ◽  
Temperature Performance ◽  
Waste Tire Rubber ◽  
Light Components

Abstract The recycling of crumbled waste tire rubber (CWTB) is a major environmental problem facing mankind, and the incorporation of CWTB as a modifier into asphalt is an extremely promising approach. However, the modification mechanism of CWTB to asphalt is not well understood, which restricts the development of CWTB-modified asphalt. In this study, the mechanism of CWTB modification of asphalt was explored in depth by dynamic mechanical analysis (DMA), fluorescence microscopy, scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR) and molecular dynamics (MD) simulations. The results of the study showed that CWTB enhanced the high temperature performance of the base asphalt. The microscopic mechanism by which this phenomenon occurs is that CWTB has the largest binding energy with the aromatics (1100–1400 kcal/mol), followed by the saturates (700–900 kcal/mol), followed by the resins (200–450 kcal/mol), and the smallest binding energy with the asphaltenes (110–160 kcal/mol), which causes CWTB to absorb the light components of the asphalt (aromatics and saturates). In the process of absorbing the light components, CWTB will gradually swell, which causes CWTB to bind more and more tightly with the base asphalt, and eventually the good high temperature performance of CWTB is transferred to the base asphalt. The macroscopic manifestation of this process is that the rutting factor of CWTB modified asphalt is significantly higher than that of virgin asphalt. This study can provide basic theoretical support for the application of CWTB modified asphalt.

Warm asphalt rubber: A sustainable way for waste tire rubber recycling

2020 ◽  
Vol 27 (11) ◽  
pp. 3477-3498
Author(s):  
Hua-yang Yu ◽  
Guan-sen Deng ◽  
Duan-yi Wang ◽  
Ze-yu Zhang ◽  
M. Oeser
Keyword(s):  
Tire Rubber ◽  
Waste Tire ◽  
Asphalt Rubber ◽  
Rubber Recycling ◽  
Waste Tire Rubber

Rheological properties of rubber modified asphalt as function of waste tire rubber reclaiming degree

2021 ◽  
pp. 130113
Author(s):  
Gang Xu ◽  
Peipei Kong ◽  
Yunhong Yu ◽  
Jingyao Yang ◽  
Minghui Zhu ◽  
...  
Keyword(s):  
Rheological Properties ◽  
Tire Rubber ◽  
Modified Asphalt ◽  
Waste Tire ◽  
Waste Tire Rubber

Treatment on Crumb Rubber Modifier towards Enhanced Storage Stability of Asphalt Rubber

2019 ◽  
Vol 2 (5) ◽  
Author(s):  
Guocheng Su ◽  
Jiangmiao Yu ◽  
Mijash Vaidya
Keyword(s):  
Low Temperature ◽  
Surface Structure ◽  
Interfacial Adhesion ◽  
Storage Stability ◽  
Research Direction ◽  
Crumb Rubber ◽  
Modified Asphalt ◽  
Waste Tire ◽  
Asphalt Rubber ◽  
Temperature Performance

Breaking waste tires into crumb and adding it to asphalt as modifier to prepare asphalt rubber (AR) is an effective method to solve the waste tire problem and improve the performance of matrix asphalt. The modified asphalt has better high and low temperature performance. However, the segregation of the crumb rubber modifier (CRM) causes storage instability of the AR. At present, studies have been conducted that improving the solubility of the CRM or adding some macromolecular polymer can improve the storage stability of the AR. However, the structure and polarity of the CRM surface are rarely explored for its correlation with the storage stability of AR. In this paper, the surface structure and polarity of the CRMs was changed by four different reagents, and the properties of the ARs prepared by the CRM were measured to analyze the adhesion between the CRM and the asphalt. It is concluded that the CRM with rough porous and non-polar surface has higher storage stability due to the better interfacial adhesion, which provides a research direction for improving the storage stability of rubber asphalt.

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