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.

scholarly journals Evaluation of Chicken Feather and Styrene-Butadiene/Chicken Feather Composites as Modifier for Asphalts Binder

2019 ◽  
Vol 9 (23) ◽  
pp. 5188 ◽  
Author(s):  
Leslie Mariella Colunga-Sánchez ◽  
Beatriz Adriana Salazar-Cruz ◽  
José Luis Rivera-Armenta ◽  
Ana Beatriz Morales-Cepeda ◽  
Claudia Esmeralda Ramos-Gálvan ◽  
...  
Keyword(s):  
Phase Separation ◽  
Rheological Properties ◽  
Asphalt Binder ◽  
Waste Product ◽  
Rubber Matrix ◽  
Styrene Butadiene Rubber ◽  
Butadiene Rubber ◽  
Chicken Feather ◽  
Main Component ◽  
Styrene Butadiene

In the present work, the evaluation of chicken feather particles (CFP) and styrene-butadiene/chicken feather (SBS-CF) composites as modifiers for asphalt binder is presented. It is well known that elastomers are the best asphalt modifiers, because their thermoplastic behavior assists asphalts in improving the range of their mechanical properties at both low and high temperatures. Nowadays, the use of natural products and byproducts as fillers for polymer matrices has been a matter of research, and the field of asphalt modification is not the exception. Chicken feather particles (CFP) is a waste material whose main component is keratin, which offers remarkable properties. In the present work, CFP was used as a filler of a styrene-butadiene rubber matrix (SBS) with radial structure, to obtain a composite intended as an asphalt modifier. Besides, raw CFP was also tested as an asphalt modifier. Physical, thermal and rheological properties of the modified asphalts were evaluated in order to determine their degree of modification with respect to the original asphalt. The results show that the addition of raw CFP improves some physical properties as penetration and decreases the phase separation; furthermore, the asphalt modified with CFP displayed similar rheological properties to those shown by the asphalt modified with SBS, while some other properties resulted in being even better, like the phase separation, with the advantage that the CFP comes from a natural waste product.

scholarly journals Effect of Phenolic Resin on the Rheological and Morphological Characteristics of Styrene-Butadiene Rubber-Modified Asphalt

Materials ◽  
2020 ◽  
Vol 13 (24) ◽  
pp. 5836
Author(s):  
Peifeng Cheng ◽  
Yiming Li ◽  
Zhanming Zhang
Keyword(s):  
Phenolic Resin ◽  
Asphalt Binder ◽  
Morphological Characteristics ◽  
Chemical System ◽  
Temperature Deformation ◽  
Styrene Butadiene Rubber ◽  
Butadiene Rubber ◽  
Modified Asphalt ◽  
Styrene Butadiene ◽  
Rheological Performance

To improve the thermal-aging stability and rheological performance of styrene–butadiene rubber (SBR)-modified asphalt, phenolic resin (PF) was introduced in the process of preparing SBR-modified asphalt by melt blending. The effect of PF and SBR on the high and low-temperature rheological performance of the asphalt binder before and after aging was evaluated by a temperature and frequency sweep using a dynamic shear rheometer (DSR). Fourier transform infrared spectroscopy (FTIR), gel permeation chromatography (GPC), and fluorescence microscopy (FM) were used to further investigate the effect of PF and SBR on the thermal stability and morphological characteristics of the asphalt binder. The results showed that the addition of PF can enhance the high-temperature deformation resistance and short-term aging resistance of SBR-modified asphalt. Moreover, PF and SBR form an embedded network structure within the asphalt binder and alleviate the deterioration of the polymer during the aging process. Compared with SBR-modified asphalt, the chemical system of composite-modified asphalt is more stable, and it can remain stable with an aging time of less than 5 h.

scholarly journals Microwave Devulcanized Crumb Rubbers in Polypropylene Based Thermoplastic Dynamic Vulcanizates

Polymers ◽  
2018 ◽  
Vol 10 (7) ◽  
pp. 767 ◽  
Author(s):  
Dániel Simon ◽  
István Halász ◽  
József Karger-Kocsis ◽  
Tamás Bárány
Keyword(s):  
Processing Parameters ◽  
Crumb Rubber ◽  
Partial Substitution ◽  
Styrene Butadiene Rubber ◽  
Butadiene Rubber ◽  
Feeding Method ◽  
Rubber Compounds ◽  
Continuous Extrusion ◽  
3D Molecular Structure ◽  
Styrene Butadiene

Because of the chemically crosslinked 3D molecular structure of rubbers, their recycling is a challenging task, especially when cost efficiency is also considered. One of the most straightforward procedures is the grinding of discarded rubber products with subsequent devulcanization. The devulcanized rubber can be used as a feedstock for fresh rubber compounds or can be blended with uncured virgin rubber and thermoplastic polymers to form thermoplastic dynamic vulcanizates (TDVs). TDVs combine the beneficial (re)processability of thermoplastics and the elastic properties of rubbers. Our current work focuses on the development of polypropylene (PP)-based TDVs with the use of a tire model rubber (MR) composed of natural rubber (NR) and styrene-butadiene rubber (SBR) in a ratio of 70/30. The research target was the partial substitution of the above fresh MR by microwave devulcanized crumb rubber (dCR). TDVs were produced by continuous extrusion, and the effects of composition (PP/MR/dCR = 40/60/0…50/35/15) and processing parameters (different screw configurations, temperature profiles, the feeding method of PP) were investigated. Results showed that the fresh rubber compound can be replaced up to 10 wt % without compromising the mechanical properties of the resulting TDV.

The Effect of Network Formation on the Rheological Properties of SBR Modified Asphalt Binders

1997 ◽  
Vol 70 (2) ◽  
pp. 256-263 ◽  
Author(s):  
Yong-Joon Lee ◽  
Lawrence M. France ◽  
Martin C. Hawley
Keyword(s):  
Rheological Properties ◽  
Laser Scanning ◽  
Network Formation ◽  
Complex Modulus ◽  
Mechanical Analysis ◽  
Global Network ◽  
Asphalt Binders ◽  
Styrene Butadiene Rubber ◽  
Butadiene Rubber ◽  
Local Networks

Abstract Styrene-butadiene rubber (SBR) was used to modify asphalt binders. The rheological and thermo-mechanical properties of the binders were investigated using rotational viscometry, dynamic shear rheometry, and thermal mechanical analysis. The optimum SBR content and mixing procedure were determined based on the rheological properties of the asphalt/SBR blends. The addition of 3–5% (w/w) SBR resulted in enhanced high temperature performance of the binders. The SBR progresses from a dispersed polymer to local networks to a global network with increasing SBR content. This phenomenon is exhibited in rheological properties such as complex modulus and melt viscosity. It is also verified visually by using a Laser Scanning Confocal Microscope. Because of this network formation, the binders showed a large increase in the complex modulus which indicates resistance to rutting.

scholarly journals Enhanced Storage Stability of Different Polymer Modified Asphalt Binders through Nano-Montmorillonite Modification

Nanomaterials ◽  
2020 ◽  
Vol 10 (4) ◽  
pp. 641 ◽  
Author(s):  
Zhibin Ren ◽  
Yongqiang Zhu ◽  
Qi Wu ◽  
Minye Zhu ◽  
Feng Guo ◽  
...  
Keyword(s):  
Storage Stability ◽  
Crumb Rubber ◽  
Styrene Butadiene Rubber ◽  
Butadiene Rubber ◽  
Widespread Application ◽  
Remarkable Effect ◽  
Modified Asphalt ◽  
Positive Effects ◽  
Polymer Modified Asphalt ◽  
Styrene Butadiene

The storage stability concern, caused by phase separation for the density difference between polymers and asphalt fractions, has limited the widespread application of polymer modified asphalt (PMA). Therefore, this study aims to improve the storage concern of PMA by incorporating nano-montmorillonite. To this end, different nano-montmorillonites were incorporated to three PMAs modified with three typical asphalt modifiers, i.e., crumb rubber (CRM), styrene–butadiene-rubber (SBR) and styrene–butadiene-styrene (SBS). A series of laboratory tests were performed to evaluate the storage stability and rheological properties of PMA binders with nano-montmorillonite. As a consequence, the incorporation of nano-montmorillonite exhibited a remarkable effect on enhancing the storage stability of the CRM modified binder, but limited positive effects for the SBR and SBS modified binders. The layered nano-montmorillonite transformed to intercalated or exfoliated structures after interaction with asphalt fractions, providing superior storage stability. Among selected nano-montmorillonites, the pure montmorillonite with Hydroxyl organic ammonium performed the best on enhancing storage stability of PMA. This paper suggests that nano-montmorillonite is a promising modifier to alleviate the storage stability concern for asphalt with polymer modifiers.

ACOUSTIC ABSORPTION, RHEOLOGICAL AND MECHANICAL CHARACTERISTICS OF WASTE EGG BOXES FIBERS FILLED SBR

2015 ◽  
Vol 77 (1) ◽  
Author(s):  
Bashir Algaily ◽  
Sombat Puttajukr ◽  
Thoranit Navarat
Keyword(s):  
Rheological Properties ◽  
Nonlinear Behavior ◽  
Strain Curve ◽  
Noise Pollution ◽  
Primary Component ◽  
Styrene Butadiene Rubber ◽  
Experimental Investigations ◽  
Acoustic Absorption ◽  
Butadiene Rubber ◽  
Design And Optimization

There are a few interesting to develop a procedure for design material with high acoustic absorption with broad acoustic frequencies range  and assess the potential of using waste living materials as the primary component in the production of sound absorbing materials for use in walls and ceilings. This research provides experimental investigations for design and optimization of composite sound absorbers with styrene butadiene rubber (SBR) and waste egg boxes (EB) fibers. The SBR/EB composites have been investigated for their acoustic absorption at different frequencies, their mechanical and rheological properties. Results indicated that an increasing EB composition enhanced the acoustic absorption coefficient. The density of SBR/EB composites were directly related to the presence of the EB fibers. The principal experimental evidences of nonlinear behavior of viscoelastic materials were discussed by investigating the stress-strain curve. In view of the rheological properties, the SBR/EB composites showed shear thinning behavior at various different conditions, that the apparent viscosity reduced with increasing shear rates and it was greater temperature sensitivity. Eventually, the data obtained clearly indicated that the heterogeneity and the viscosity of the materials play very important factors to provide suitable absorbers, these new materials were beneficial for using as a sound absorber and could be used as an alternative replacement for conventional product because for instance, they are cheaper, nonabrasive and may serve to reduce the noise pollution.

Preferential Media for Abrasive Flow Machining

2009 ◽  
Vol 131 (1) ◽  
Author(s):  
Kamal K. Kar ◽  
N. L. Ravikumar ◽  
Piyushkumar B. Tailor ◽  
J. Ramkumar ◽  
D. Sathiyamoorthy
Keyword(s):  
Rheological Properties ◽  
Testing Machine ◽  
Styrene Butadiene Rubber ◽  
Butadiene Rubber ◽  
Abrasive Flow Machining ◽  
Wide Range ◽  
Good Improvement ◽  
Temperature Shear ◽  
Styrene Butadiene ◽  
Surface Improvement

The abrasive flow machining (AFM) is used to deburr, radius, polish and remove recast layer of components in a wide range of applications. Material is removed from the workpiece by a flowing semisolid mass across the surface to be finished. In this study a medium for AFM has been developed from the various viscoelastic carriers and has been contrasted through experimental investigation. The viscoelastic media are selected on the basis of existing media through the studies of thermogravimetric analysis and are characterized by mechanical, as well as rheological, properties with the help of a universal testing machine and a rheometer. The performance of the medium is evaluated through the finishing criteria on a two-way AFM setup. The investigation reveals that the styrene butadiene rubber (SBR) medium gives a good improvement in surface finish. The surface improvement through SBR media is 88%. It is also found that the strain, temperature, shear rate, time of applied constant stress, cyclic loading, etc. have an impact on the mechanical and rheological properties of the newly developed medium, which are ultimately governed by the performance of the medium in the target applications.

Effects of Calcium Carbonate and Treated Palm Oil Fly Ash on the Rheological Properties of Asphalt Mastic

2015 ◽  
Vol 802 ◽  
pp. 321-326
Author(s):  
Meor Othman Hamzah ◽  
Foad Mohamed Elkut
Keyword(s):  
Fly Ash ◽  
Calcium Carbonate ◽  
Rheological Properties ◽  
Palm Oil ◽  
Asphalt Binder ◽  
Rotational Viscometer ◽  
Asphalt Mastic ◽  
Aging Conditions ◽  
Pavement Construction ◽  
Oil Fly Ash

In sustainable asphalt pavement construction, the proper selection of materials can be a challenging task. This paper focuses on a newly developed asphalt modifier named calcium carbonate (CaCO3) combined with Treated Palm Oil Fly Ash (TPOFA) to improve the properties of asphalt mastic. The rheological properties of mastic in terms of penetration, softening point, rotational viscosity and Superpave rutting factor using 60/70 asphalt binder blended with 5, 10, 15, 20 % of CaCO3+TPOFA were calculated to evaluate asphalt binder properties subjected to different aging conditions. The rotational viscometer (RV) was used to evaluate the properties of mastic at test temperatures from 120°C to 170°C. The dynamic shear rheometer (DSR) was used in temperature sweep test from 46°C to 82°C at 6°C increments at 10 rad/sec frequency to measure the G*, δ and Superpave rutting factor G*/sinδ. A one-way ANOVA statistical analysis was used to analyze the results .The test results showed that all asphalt mastic exhibited higher viscosity compared to the base binder. The addition of CaCO3 +TPOFA increased the G* but reduced the phase angle which indicated improved stiffness of asphalt mastic. Hence, incorporating CaCO3+TPOFA can potentially improve the rutting resistance of asphalt mastic.

Sign in / Sign up

Export Citation Format

Share Document