Study on Rheological Properties of Warm Mix Waste Plastic/SBS Composite Modified Asphalt

XU Chuan-hao, SHI Zhen-wu, CHENG You-kun, YIN Zhi-yi

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Plastics Science and Technology ›› 2024, Vol. 52 ›› Issue (12) : 70-76. DOI: 10.15925/j.cnki.issn1005-3360.2024.12.013
Processing and Application

Study on Rheological Properties of Warm Mix Waste Plastic/SBS Composite Modified Asphalt

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Abstract

In order to study the effect of warm mixture on the rheological properties of waste plastic/styrene-butadiene-styrene triblock copolymer (SBS) composite modified asphalt, BMH warm mixture with different mass fraction (1.0%, 1.2% and 1.4%) was added into asphalt. The effects of BMH on the rheological properties of waste plastic/SBS composite modified asphalt were analyzed by Fourier transform infrared spectroscopy (FTIR), dynamic shear rheology (DSR), multi-stress creep recovery test (MSCR) and low temperature bending beam rheological test (BBR). The results show that BMH can significantly improve the high temperature deformation resistance and reduce the stress sensitivity of waste plastic/SBS composite modified asphalt, and when the warm mixture mass fraction is 1.2%, the improvement effect is the best, and the improvement effect of 1.4% mass fraction does not increase but decreases. BMH can improve the medium temperature fatigue resistance of waste plastic/SBS composite modified asphalt, the improvement effect of 1.2% content is the most obvious, and the improvement effect of other content is similar. BMH can improve the low-temperature rheological properties of waste plastic/SBS composite modified asphalt, the asphalt stress relaxation capacity is the best when the mass fraction is 1.4%, and the low-temperature cracking resistance is the best.

Key words

Waste plastic/SBS modified asphalt / Warm mix technology / Rheological properties / Infrared spectroscopy / Burgers model

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XU Chuan-hao , SHI Zhen-wu , CHENG You-kun , et al. Study on Rheological Properties of Warm Mix Waste Plastic/SBS Composite Modified Asphalt. Plastics Science and Technology. 2024, 52(12): 70-76 https://doi.org/10.15925/j.cnki.issn1005-3360.2024.12.013

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