Characteristics of warm mixed asphalt modified by waste polymer and nano-silica

Obaid, Hayder Abbas

doi:10.1007/s42947-020-0061-9

Cited by 22 publications

(5 citation statements)

References 30 publications

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“…This issue implied that NS and SBS significantly changed ITS of the specimens by developing a strong attractive force between asphalt and the aggregate surfaces. It signified that SBS with NS strengthened the adhesive and cohesive bonds among bitumen-coated aggregates in the specimens, leading to the development of better stripping and moisture resistance, which is also supported by research studies [28].…”

Section: Results Of Its Testsupporting

confidence: 57%

“…Figure 6 illustrates the rutting potential of the specimens, in which the rutting resistance was improved as the NS content was increased to 6% and then it was decreased onward. This improvement is attributable to an increase in the adhesion force among bitumen and aggregates, which prevented aggregates from sinking under the influence of the axle load, hence reducing the rutting deformation [28]. The study indicated that adding NS to the specimens reduced rutting in comparison to the unmodified specimen and 4.5% SBS-modified HMA specimen.…”

Section: Results Of Wttmentioning

confidence: 92%

“…To examine the responsiveness of the dependent variables (MR) to the modifier and temperature, an experimental design, factorial design was utilized [26][27][28]. A mixture of several factors was used in the experimental design to check the effectiveness of such variables on the response variable.…”

Section: Experimental Design Of Mrmentioning

confidence: 99%

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Engineering Characteristics of SBS/Nano-Silica-Modified Hot Mix Asphalt Mixtures and Modeling Techniques for Rutting

Khan,

Khattak,

Bahrami

et al. 2023

Buildings

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Flexible pavements are mostly affected by meteorological factors in addition to traffic loads, which results in premature pavement failures like rutting and moisture-induced damage. This study focuses on the impacts of adding various contents of nano-silica (NS), i.e., 2%, 4%, 6%, and 8% (percentage weight of asphalt), along with a constant value of 4.5% styrene-butadiene-styrene (SBS). To assess the effectiveness of modified and unmodified mixtures, the indirect tensile strength (ITS) test, resilient modulus (MR) test, and wheel tracking test were conducted. The MR test was performed at dual temperature values, i.e., 25 °C and 40 °C, and demonstrated different metrological conditions in this region. The tensile strength ratio was used to estimate the mitigation of water losses in hot mix asphalt (HMA) mixtures (specimens) utilizing ITS test results of the conditioned and unconditioned specimens. Moreover, a model was developed for the rutting potential of the modified specimens using multi expression programming (MEP), a sophisticated technique that employs experimental data and suggests an equation for different input variables. The results indicated that the addition of NS to SBS-modified bitumen enhanced different mechanical properties of the specimens, including the stiffness and moisture and rutting resistances. The temperature had adverse effects on the stiffness of the specimens, while the modifiers had a direct relationship with the stiffness. The two-way factorial method justified the effect of the temperature and modifiers on MR with 95% precision, while the MEP model for rutting showed an R2 value of >0.95, which revealed a good relationship between the experimental and predicted data. Furthermore, NS and SBS had a good impact on the mechanical properties of the HMA specimens.

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Section: Results Of Its Testsupporting

confidence: 57%

Section: Results Of Wttmentioning

confidence: 92%

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Engineering Characteristics of SBS/Nano-Silica-Modified Hot Mix Asphalt Mixtures and Modeling Techniques for Rutting

Khan,

Khattak,

Bahrami

et al. 2023

Buildings

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“…PP has been used as a filler to be incorporated into construction materials or other polymer matrix materials due to its good properties, such as concrete, 9 asphalt, 10 polyvinyl chloride (PVC) 11 . Feng et al 12 studied that PP fibers grafted with acrylic acid and graphene oxide (GO) improved the dynamic modulus of elasticity and freeze–thaw durability of concrete materials due to the improved hydrophilicity of PP.…”

Section: Introductionmentioning

confidence: 99%

Non‐isothermal crystallization kinetics of polypropylene/layered double hydroxide composites

Guo

Bai

et al. 2021

Polymers for Advanced Techs

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The crystalline behaviors of polymers have a large impact on their physical and mechanical properties, especially as reinforcing and toughening materials in the construction industry. This work investigates the crystallization behaviors of polypropylene (PP) composites with layered double hydroxide (LDH) by using differential scanning calorimeter and a polarizing optical microscope (POM), and analyzed the non‐isothermal crystallization kinetics of PP composites by Avrami model and Mo's method. The results show that the entire process of non‐isothermal crystallization is appropriate for Mo′s method instead of Avrami model due to the offset of the curves in initial nucleation and secondary crystallization stages. The addition of LDH and modified LDH (SLDH) can increase the crystallinity (Xc) of PP despite decreasing the crystallization rate in the non‐isothermal crystallization process. The migration activation energy (∆E) indicates that LDH acts as a heterogeneous nucleating agent, which is consistent with POM results. The values of ∆E and semi‐crystallization time (t1/2) reveal that the nucleation capacity of PP/LDH is greater than that of PP/SLDH, but the crystallization rate of PP/LDH is slower than that of PP/SLDH, resulting in a decrease in Xc.

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“…Strategies to improve this failure mode, involve the incorporation of modifiers into the asphalt binders [12][13][14][15]. While most polymer-modified binders are known to improve performance, they are expensive and hard to find, which makes the production cost of the binders modified with them to be high [16,17], and availability challenges have led to the exploration of industrial-based modifiers like polymer-based waste [18][19][20][21]. Industrial waste, a significant global concern, prompts the exploration of sustainable solutions.…”

Section: Methodsmentioning

confidence: 99%

Understanding the Effects of Plastic Fines as a Bitumen Modifier on the Performance Properties of Hot Mix Asphalt

Usanga,

Ikeagwuani,

Ambrose

2023

Asec 2023

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Characteristics of warm mixed asphalt modified by waste polymer and nano-silica

Cited by 22 publications

References 30 publications

Engineering Characteristics of SBS/Nano-Silica-Modified Hot Mix Asphalt Mixtures and Modeling Techniques for Rutting

Engineering Characteristics of SBS/Nano-Silica-Modified Hot Mix Asphalt Mixtures and Modeling Techniques for Rutting

Non‐isothermal crystallization kinetics of polypropylene/layered double hydroxide composites

Understanding the Effects of Plastic Fines as a Bitumen Modifier on the Performance Properties of Hot Mix Asphalt

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