Effect of crumb rubber degradation on components distribution and rheological properties of Terminal Blend rubberized asphalt binder

2017 ◽  
Vol 151 ◽  
pp. 897-906 ◽  
Author(s):  
Weidong Huang ◽  
Peng Lin ◽  
Naipeng Tang ◽  
Jianying Hu ◽  
Feipeng Xiao
Keyword(s):  
Rheological Properties ◽  
Asphalt Binder ◽  
Crumb Rubber ◽  
Rubber Degradation

The Rheological Properties of Crumb Rubber with Different Recycled Waste Tires Modified Binders

2018 ◽  
Vol 913 ◽  
pp. 1045-1053 ◽  
Author(s):  
Hao Chen ◽  
Shao Peng Wu ◽  
Gang Liu ◽  
Yong Jie Xue
Keyword(s):  
Rheological Properties ◽  
Asphalt Binder ◽  
Crumb Rubber ◽  
Styrene Butadiene Rubber ◽  
Butadiene Rubber ◽  
Passenger Cars ◽  
Waste Tires ◽  
Modification Effect ◽  
Truck Tire ◽  
Pavement Construction

In this study, three typical tires from bicycles, passenger-cars and trucks were collected and ground into crumb rubber modifiers (CRM) with different particle sizes to modify the asphalt binder. The composition and surface morphology of the three CRMs were analyzed by thermogravimetric analysis (TG-MS) and scanning electron microscopy (SEM). The rheological properties of the binder were evaluated using a dynamic shear rheometer (DSR) and a bending rheometer (BBR). The results show that the main rubber compositions in the bicycle tire (B), the passenger tire (P) and the truck tire (T) are butyl rubber (IIR), styrene-butadiene rubber (SBR) and natural rubber (NR), respectively. Adding CRMs improve rheological properties of base binder. Due to the differences between the composition and the structure, the rheological properties of the P CRM and T CRM containing more SBR and more NR are better at high temperatures and lower temperatures, respectively. And finally the CRM resources and particle size determine the rheological properties of modification effect of base binder. The results can be used to guide the classification and disposal of waste tires. According to the expected modification effect of the asphalt binder, the productions of asphalt pavement construction are enhanced by the high quality products of CRMs.

Laboratory evaluation on the high temperature rheological properties of rubber asphalt: a preliminary study

2012 ◽  
Vol 39 (10) ◽  
pp. 1125-1135 ◽  
Author(s):  
Hainian Wang ◽  
Zhanping You ◽  
Shu Wei Goh ◽  
Peiwen Hao ◽  
Xiaoming Huang
Keyword(s):  
High Temperature ◽  
Rheological Properties ◽  
Rubber Particle ◽  
Asphalt Binder ◽  
Field Performance ◽  
Crumb Rubber ◽  
Testing Temperature ◽  
Asphalt Mixtures ◽  
Laboratory Evaluation ◽  
Loading Frequency

Crumb rubber is the recycled rubber particle obtained from mechanical shearing or grinding scrap tires into small particle sizes less than 6.3 mm (or approximately 1/4”). The rheological properties of asphalt binder have an important effect on the field performance of asphalt mixtures and the long-term serviceability of asphalt pavement. The objective of this research is to evaluate the high temperature rheological performance of rubber asphalt binder based on the complex shear modulus (|G*|) and the phase angle (δ) values using the dynamic shear rheometer. Five rubber asphalt dosages at 0, 10, 15, 20, and 25% by weight of asphalt (Superpave PG 64-22), respectively, were used to modify asphalt binder; and three rubber particle meshes, 20#, 30#, and 40#, were utilized in this research. The |G*| at various temperatures and frequencies were tested on each sample, including original and short-term aging binder using the rolling thin-film over. The master curves of |G*|/sin(δ) for each type of rubber asphalt was generated to investigate its rheological properties over a broad range of temperatures and frequencies. Based on the testing results, it was found that the addition of crumb rubber significantly increases the |G*| of asphalt binder, which is desirable to potentially improve the anti-rutting performance of asphalt mixtures. It was also found that the addition of 10% mesh crumb rubbers bumps up the high temperature grade of asphalt, from PG64 to PG76 in this case. The master curve using the |G*|/sin(δ) of rubber asphalt shows a substantial improvement in rutting resistant at each testing temperature and loading frequency. However, it was noteworthy that the rutting resistance enhancement of crumb rubber was affected by the percentage of rubber used, the rubber particle size and its aging condition.

scholarly journals Microscopic Properties of Hydrogen Peroxide Activated Crumb Rubber and Its Influence on the Rheological Properties of Crumb Rubber Modified Asphalt

Materials ◽  
2019 ◽  
Vol 12 (9) ◽  
pp. 1434 ◽  
Author(s):  
Bo Li ◽  
Hao Li ◽  
Yongzheng Wei ◽  
Xingjun Zhang ◽  
Dingbang Wei ◽  
...  
Keyword(s):  
Hydrogen Peroxide ◽  
Rheological Properties ◽  
Average Pore Size ◽  
Asphalt Binder ◽  
Crumb Rubber ◽  
Average Pore ◽  
Moisture Susceptibility ◽  
Rubber Powder ◽  
H2o2 Solution ◽  
Resistance Decrease

Crumb rubber modified (CRM) asphalt binder has been affirmed to improve resistance to rutting, moisture susceptibility, low-temperature cracking, and asphalt durability. However, CRM has poor compatibility with asphalt since crumb rubber molecules are vulcanized. The objective of this study was to develop a new method to prepare activated crumb rubber using hydrogen peroxide (H2O2) solution and to explore the rheological properties of H2O2 activated CRM (ACRM) asphalt. Three different percentages of H2O2 solution were used to activate crumb rubber. The surface properties of oxidized rubber were analysed using scanning electron microscopy. Moreover, the pore structure in rubber powder was investigated. The rheological properties of bitumen samples obtained from treated and untreated rubber were characterized by conducting dynamic shear rheometer tests. The test results show that the average pore size of the crumb rubber after activation with H2O2 solution is significantly smaller than that of the inactivated crumb rubber, and the volume and surface area of the crumb rubber pores change with H2O2 solution activation in a certain pattern. With the increase in H2O2 solution content, the contact surface between the particles increases, the floccules and pores of the powder increase, and the interface degree between the crumb rubber powder and the asphalt is strengthened. Solubility of the rubber hydrocarbon and the release ability of the carbon black particles from the crumb rubber in the asphalt binder increase, but the mechanical properties of the crumb rubber, including the strength, elasticity, and wear resistance, decrease. As a result, a reduction is observed in the elasticity, viscosity, high-temperature rutting resistance, and elasticity of the ACRM asphalt.

Effect of used motor oil as a rejuvenator on crumb rubber modifier’s released components to asphalt binder

2020 ◽  
pp. 147776062091860
Author(s):  
Eslam Deef-Allah ◽  
Magdy Abdelrahman
Keyword(s):  
Rheological Properties ◽  
Asphalt Binder ◽  
Crumb Rubber ◽  
Motor Oil ◽  
Modified Asphalt ◽  
Synthetic Rubber ◽  
Used Motor Oil ◽  
C 50 ◽  
Modified Binder ◽  
Molecular Weight Fractions

Asphalt binder modification by crumb rubber modifier (CRM) could enhance its rheological properties at high and intermediate temperatures by increasing its stiffness and elasticity. To obtain a modified binder blend with more enhanced intermediate- and low-temperature rheological properties, used motor oil (UMO) was introduced to the crumb rubber-modified asphalt (CRMA) binder. The enhanced high- and intermediate-temperature rheological properties of the modified binders were investigated using a temperature sweep test. UMO, used as a rejuvenator, can regulate the CRM role in the modified binder blend by creating a balance between the binder’s enhanced stiffness and fluidity. This was achieved by increasing |G*|/sin δ at high temperatures and decreasing |G*|.sin δ at intermediate temperatures. The mutual components between the CRM and the asphalt binder were explored by thermogravimetric analysis and Fourier transform infrared (FTIR) spectroscopy. UMO was found to have similar FTIR bands of the asphalt binder that helped the CRM particles to absorb more low-molecular-weight fractions at the beginning of the interaction time, which caused them to swell more and then dissolve, releasing their polymeric components in the asphalt binder’s liquid phase. Adding UMO with two and half percentage by the weight of the neat asphalt binder to the CRMA binder, interacted at 190°C–50 Hz–60 min, could increase the CRM dissolution and cause a greater release of CRM polymeric components into the asphalt binder matrix. This was assured by the presence of FTIR peaks at 911 and 966 cm−1 that are related to the polybutadiene, synthetic rubber in CRM.

Impact of Rubber Modifier on the Rheological Properties of Asphalt

2014 ◽  
Vol 997 ◽  
pp. 465-470
Author(s):  
Zhi Gang Zhou ◽  
Min Lei ◽  
Ju Yong Chen
Keyword(s):  
Low Temperature ◽  
Physical Properties ◽  
Rheological Properties ◽  
Permanent Deformation ◽  
Asphalt Binder ◽  
Crumb Rubber ◽  
Enhanced Resistance ◽  
Low Temperature Cracking ◽  
Reduced Temperature ◽  
Modify Asphalt

Using crumb rubber to modify asphalt binder can not only improve the binder properties, but also shows environmental and economical advantages. To evaluate the function of the RM modifier in binders, physical properties and rheological properties were investigated. Specifically, the high and low temperature sweep methods was used to investigate influence that the RM on rheological properties of binders. Results showed that binder modification using the RM produces significant increase in both physical properties and rheological properties. Consequently, enhanced resistance to permanent deformation, increased low-temperature cracking and reduced temperature sensitivity can be expected in RM binder.

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