Composite modification mechanism of blended bio-asphalt combining styrene-butadiene-styrene with crumb rubber: A sustainable and environmental-friendly solution for wastes

Zhang, Dong; Zhou, Tao; Hai, Liu; Williams, R. Christopher; Wang, Peng; Leng, Zhen

doi:10.1016/j.jclepro.2019.01.004

Cited by 119 publications

(32 citation statements)

References 32 publications

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“…One of the main ways to consume tire waste is in the production of technically less demanding rubbers by mixing rubber powder (i.e., grinding the rubber waste to form granulates) with new rubbers (or plastics) [7]. Sports and playing surfaces, floors and walkway tiles, concrete mixtures [8], asphalt mixtures [9], thermal and acoustic isolation, and footwear, among others, are traditional fields of application of ground tire rubber (GTR).…”

Section: Introductionmentioning

confidence: 99%

Giving a Second Opportunity to Tire Waste: An Alternative Path for the Development of Sustainable Self-Healing Styrene–Butadiene Rubber Compounds Overcoming the Magic Triangle of Tires

et al. 2019

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Current regulations demand tires with long lifetime and reduced fuel consumption without sacrificing car safety. However, tire technology still needs to reach a suitable balance between these three indicators. Here, we address them by developing a self-healing tire compound using styrene–butadiene rubber (SBR) as the matrix and reclaimed tire waste as the sustainable filler. The addition of ground tire rubber (GTR) to the matrix simultaneously improved the rolling resistance and maintained both wet grip and healing ability. We provide an in-depth analysis of the healing behavior of the material at a scale close to the relevant molecular processes through a systematic dynamic-mechanical and dielectric analysis. We found that SBR and SBR/GTR compounds show a complete recovery of stiffness and relaxation dynamics after being damaged by cyclic deformation, resulting in a heterogeneous repaired rubber network. This new development could well overcome the so-called magic triangle of tires, which is certainly one of the key objectives of the tire industry.

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Section: Introductionmentioning

confidence: 99%

Giving a Second Opportunity to Tire Waste: An Alternative Path for the Development of Sustainable Self-Healing Styrene–Butadiene Rubber Compounds Overcoming the Magic Triangle of Tires

et al. 2019

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“…The characteristic bands in the absorption spectrum of the transmitted IR radiation can be used to identify the chemical bond. By comparing and analyzing the functional groups of the asphalt binders before and after modification, determination on whether some chemical reactions or physical process had occurred during the composite modification would be made [40]. In general, the infrared spectrum shown in Figure 3a comprises wavenumbers ranging from 4000 cm −1 to 400 cm −1 .…”

Section: Fourier Transform Infrared (Ftir)mentioning

confidence: 99%

“…The Absorption peaks 2921 and 2850 cm −1 correspond to CH2 and CH3 Stretching (Alkanes) in bitumen, whereas C=C stretching-aromatics correspond to IR peaks at 1600 cm −1 . The absorbance peaks at 1467 and 1378 represent CH3 asymmetric and symmetric deformation-alkanes, respectively [40]. For nanosilica powder, the absorption peak at 1050 cm −1 corresponds to the Si-O-Si bond, which is the silicone backbone for silica modified surface; however, this peak shifts towards the 1100 cm −1 wavelength when nanosilica is incorporated into the binder.…”

Section: Fourier Transform Infrared (Ftir)mentioning

confidence: 99%

Improving Storage Stability and Physicochemical Performance of Styrene-Butadiene-Styrene Asphalt Binder Modified with Nanosilica

et al. 2020

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Due to storage stability drawbacks of polymer-modified bitumen (PMB), this study investigated the storage stability and physicochemical performance of Styrene-Butadiene-Styrene (SBS) asphalt binders (herein PMB) modified with Silicone surface-treated nanosilica (SNS). Dosages 0% (control), 1.5%, 3% and 5% SNS powder were added to PMB to prepare modified binders. Hot storage, Viscosity, Multiple Stress Creep Recovery (MSCR), Scanning Electron Microscopy (SEM), Fluorescence Microscopy (FM), Linear Amplitude Sweep (LAS), Fourier Transform Infrared (FTIR), and Proton Nuclear Magnetic Resonance (1H-NMR) tests were conducted using modified binders. The study found that adding nanosilica powder to PMB improved storage stability, increased viscosity and complex modulus, and reduced rutting of binders. However, this bitumen modification was not beneficial to fatigue cracking. The performance improvement was because of the interaction between the polymer and nanosilica, creating a new polymer-nanosilica network which lowered the dynamics around the SNS particles, thereby reducing phase separation. Further, the Silicone Si–O–Si backbone bond present in SNS modified asphalt binder reduced temperature sensitivity thereby preventing thermal degradation at high storage temperature. Nanosilica modified binders presented well-dispersed nanosilica particles in the asphalt matrix. The modification mechanism was predominantly physical. Overall, the study concluded that nanosilica improves storage stability, rutting, and morphology of PMB binders.

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“…However, with the rapid and large-scale construction and maintenance of highway and airfield pavements, the availability of non-renewable, limited, and essential construction materials is declining [9][10][11][12]. Hence, pavement engineering needs to move away from a resource-consumption industry, shifting toward being more environment-friendly and sustainable [13][14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%

Aggregate-Bitumen Interface Enhancement Mechanism of Utilization of Oil Shale Waste as Fine Aggregate in Open Grade Friction Course

Guo

Chen

et al. 2019

Coatings

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Oil shale waste (OSW), as fine aggregate in the mixture (particle size less than 4.75 mm), can effectively improve the overall properties of open grade friction course (OGFC), but the reinforcement mechanism is not clear. Thus, a comprehensive investigation of the reinforcement mechanism of OSW as fine aggregate is essential to provide better understanding for promoting its engineering application. In this paper, the reinforcement mechanism of OSW was explored through numerical calculations and laboratory tests from three aspects: macroscopic mechanical characteristics of mixture, micromechanics of asphalt mortar containing OSW filler, and adsorption characteristics of OSW. Numerical simulation results showed that the aggregate with a particle size greater than 4.75 mm in OGFC is the skeleton, which is the main loading bearing aggregate, and the skeleton bears more than 85% of external loads. The beam bending test and indirect tensile test results illustrated that the introduction of OSW improves the shear resistance and flexure-tension resistance properties of asphalt mortar, which is beneficial the overall properties of OGFC. From the Brunauer Emmett Tell test and Scanning Electron Microscope test, it was known that OSW has large specific surface area, dense pore structure, and various mesoporous shapes, which means a larger adsorption area and stronger adsorption with asphalt binder. Three self-developed tests containing asphalt adsorption capacity test, infiltrated asphalt saturation test and aggregate-bitumen interface observation test manifested that the existence of “claws”-pointed synapses at OSW-bitumen interface is the main reason for the significant improvement of properties of asphalt mortar containing OSW filler.

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Composite modification mechanism of blended bio-asphalt combining styrene-butadiene-styrene with crumb rubber: A sustainable and environmental-friendly solution for wastes

Cited by 119 publications

References 32 publications

Giving a Second Opportunity to Tire Waste: An Alternative Path for the Development of Sustainable Self-Healing Styrene–Butadiene Rubber Compounds Overcoming the Magic Triangle of Tires

Giving a Second Opportunity to Tire Waste: An Alternative Path for the Development of Sustainable Self-Healing Styrene–Butadiene Rubber Compounds Overcoming the Magic Triangle of Tires

Improving Storage Stability and Physicochemical Performance of Styrene-Butadiene-Styrene Asphalt Binder Modified with Nanosilica

Aggregate-Bitumen Interface Enhancement Mechanism of Utilization of Oil Shale Waste as Fine Aggregate in Open Grade Friction Course

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