Experimental investigation of effect of PP/SBR polymer blends on the moisture resistance and rutting performance of asphalt mixtures

Vamegh, Mostafa; Ameri, Mahmoud; Naeni, Seyed Farhad Chavoshian

doi:10.1016/j.conbuildmat.2020.119197

Cited by 33 publications

(12 citation statements)

References 22 publications

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“…Polypropylene (PP), as a kind of general‐purpose plastic, is widely used in construction materials due to its low cost, good mechanical properties, and great chemical resistance. In addition, PP is used as a toughening reinforcement or interfacial adhesion 2,3 . Unfortunately, the low‐impact strength in low temperature, poor toughness, and weather resistance limit the application of PP 4 …”

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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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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“…To sum up, the PG classification of asphalt can be improved by adding SBR/PP thermoplastic elastomer to enhance the adaptability of asphalt in high- and low-temperature environments [ 35 ]. When compatibilizers and crosslinkers were added to SBR/PP thermoplastic elastomer, the resistance of SBR/PP composite asphalt to rutting was further improved.…”

Section: Resultsmentioning

confidence: 99%

Evaluation of the Thermal Stability and Micro-Modification Mechanism of SBR/PP-Modified Asphalt

Zhang,

Hou,

et al. 2024

Polymers

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To evaluate the thermal stability of composite polymer-modified asphalt, thermoplastic elastomer styrene-butadiene rubber (SBR)/polypropylene (PP) pellets were prepared using a hot-melt blending technique, with butyl rubber powder and waste polypropylene pellets as raw materials. The effects of different evaluation indexes on the thermal stability of SBR/PP-modified asphalt were investigated using a frequency scan test and a multi-stress creep recovery (MSCR) test, and the compatibility of SBR/PP particles with asphalt was studied using the Cole–Cole diagram and microstructure images. The tests show that, firstly, the performance grade (PG) classification of asphalt can be improved by adding an SBR/PP thermoplastic elastomer to enhance the adaptability of asphalt in high- and low-temperature environments, and the evaluation separation index can reflect the high-temperature storage stability of composite-modified asphalt more reasonably. Additionally, the larger the rubber-to-plastic ratio the worse the high-temperature thermal stability of composite-modified asphalt. Moreover, the addition of additives to the composite particles can promote the SBR/PP particles in the asphalt to be more uniformly dispersed, forming a more desirable microstructure and improving the thermal stability of composite-modified asphalt. Ultimately, the semicircular curve of the Cole–Cole diagram can reflect the compatibility characteristics of the two-phase structure of SBR/PP-modified asphalt, which can be used as an auxiliary index to evaluate the compatibility of polymer-modified asphalt.

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“…This indirectly reveals that PP could have a positive impact on the characteristics of bitumen. To improve the performance of SBR-modified bitumen, Vamegh et al [ 7 ] selected PP as a modifier and investigated the impact of PP on the binder’s performance. Their conclusions declared that the stability of SBR/PP-modified asphalt mixture was markedly promoted and the moisture sensitivity was reduced as well, which was better or at least as good as SBS-modified bitumen.…”

Section: Introductionmentioning

confidence: 99%

Preparation and Performance of Bitumen Modified by Melt-Blown Fabric of Waste Mask Based on Grey Relational and Radar Chart Analysis

Cheng,

Zheng,

Zhang

et al. 2024

Polymers

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To effectively utilize waste mask materials in road engineering and minimize resource waste, the melt-blown fabric (MBF) of waste masks was utilized to modify the virgin bitumen. The preparation process of MBF-modified bitumen was investigated, and the physical and rheological properties of bitumen were measured. Subsequently, the blending mechanism during preparation and the dispersion morphology of the modifier were explored. Finally, the pavement performance of the mixture was investigated, and a radar chart analysis was performed to quantitatively assess the effects of MBF modification. Results suggested that the recommended preparation process of shear time, shear rate, and shear temperature was 170 °C, 4000 r/min, and 15 min, respectively. MBF enhanced the high-temperature stability of the binder and weakened the temperature susceptibility. The modification was primarily a physical process. No network structure and agglomeration formed in the bitumen after modification. The addition of MBF significantly improved the resistance of the asphalt mixture to a high-temperature deformation and water damage but harmed its low-temperature crack resistance. The comprehensive assessment results of 0% (f1), 1% (f2), 3% (f3), and 5% (f4) MBF to improve the properties of the mixture were in the following order: f3>f4>f2>f1, where the impact of 3% MBF was the most significant, followed by 5% and 1% MBF.

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Experimental investigation of effect of PP/SBR polymer blends on the moisture resistance and rutting performance of asphalt mixtures

Cited by 33 publications

References 22 publications

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

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

Evaluation of the Thermal Stability and Micro-Modification Mechanism of SBR/PP-Modified Asphalt

Preparation and Performance of Bitumen Modified by Melt-Blown Fabric of Waste Mask Based on Grey Relational and Radar Chart Analysis

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