Effects of recycled PET and TEOA on performance characteristics of bitumen

doi:10.14256/jce.3358.2021

Cited by 2 publications

(3 citation statements)

References 26 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, regarding the material quality, an increase in the plastomer content resulted in a successive reduction in the bitumen resistance to low temperatures. Similar results were obtained by the authors of study [29], where it was demonstrated that a PET content increase to a level of 6% and enrichment with a compatibilizer does not imply any deterioration of the low-temperature properties of bitumen.…”

Section: Modelling Of Bitumen Properties Using a Generalised Linear M...supporting

confidence: 89%

See 1 more Smart Citation

Effects of the Mixing Process on the Rheological Properties of Waste PET-Modified Bitumen

Mazurek,

Buczyński,

Iwański

et al. 2023

Materials

View full text Add to dashboard Cite

This paper analyses the key findings of a study devoted to PET-modified bitumen. The research program was run according to the D-optimal experimental plan based on a factorial design. Five factors, i.e., the type of polymer (source), the type of bitumen (qualitative factors), PET amount, mixing rate, and mixing temperature (quantitative factors), controlled the bitumen–polymer mixing process. The experiment included a series of determinations of bitumen’s rheological characteristics obtained by MSCR (Jnr, R) and G*/sin(δ) at 50 °C, 60 °C, and 70 °C. The low-temperature properties of the composite (critical temperature) were evaluated using a BBR test. The findings showed that bitumen modification with PET primarily reduced the creep susceptibility of the bituminous–polymer mixture. The low-temperature characteristics of the modified bitumen played a secondary but essential role. The amount of polymer and the mixing rate interacted with the temperature, significantly reducing the stiffness of the composite, while the type and amount of bitumen had a substantial effect on the results obtained in the BBR test. It is worth noting that when combining bitumen and plastomer, special attention should be paid to ensuring a high level of homogeneity of the mixture by controlling the parameters of the mixing process accordingly. The tests and analyses provided crucial models (GLM), which allowed for the prediction of the plastomer-modified bitumen’s low- and high-temperature properties. The resulting relationships between factors and the identification of their impact on the bitumen properties enable a better understanding of the process of bitumen modification with PET. The conclusions presented here serve as a basis for future optimisation of the modified bitumen composition. The performed studies indicate that the use of >3% plastomer in bitumen 70/100 allows for a reduction in its susceptibility (MSCR) to below 0.5 kPa−1, making it suitable for bituminous mixtures for high-traffic roads. No significant increase in critical temperature (BBR) was observed.

show abstract

Section: Modelling Of Bitumen Properties Using a Generalised Linear M...supporting

confidence: 89%

“…An increase in the PET content improves the stiffness and viscosity of bitumen and bituminous mixes [27,28]. Studies on PET implementation showed no evident mix stability losses or adverse impacts on the BBR critical temperature when the PET content was up to 6% [29].…”

Section: Introductionmentioning

confidence: 98%

Effects of the Mixing Process on the Rheological Properties of Waste PET-Modified Bitumen

Mazurek,

Buczyński,

Iwański

et al. 2023

Materials

View full text Add to dashboard Cite

show abstract

“…ASTM D7175) by determining complex shear modulus (|G*|) defined as a measure of the binder's total resistance to deformation upon shear stress, and phase angle (δ) being an indicator of relative viscous and elastic deformation of the binder. By measuring these parameters, the rutting and fatigue performance of the binders can be determined [30,38]. According to the Superpave criterion outline in AASHTO M320 [39], the rutting factor (|G*|/sin(δ)) represented the high-temperature viscous component of the total bitumen stiffness and, following the standard, must reach a minimum of 1 kPa for the original binder to estimate the high-temperature Performance Grade (PG up ) of the analyzed sample.…”

Section: Methods Of Polymer-modified Bitumen Characterizationmentioning

confidence: 99%