The use of waste polymers to modify bitumen

Domínguez, Francisco Javier Navarro; García‐Morales, M.

doi:10.1533/9780857093721.1.98

Cited by 7 publications

(4 citation statements)

References 40 publications

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“…In the initial research phase, the bitumen to be modified with the chosen plastomers was selected and comprehensively evaluated [39]. Based on the conclusions from previous studies [34,40], two different types of bitumen, 50/70 (Orlen, Poland) and 70/100 (Orlen, Poland), were chosen and subjected to basic rheological tests. The choice was defined by the need to reproduce different rheological states of the bitumen.…”

Section: Bitumenmentioning

confidence: 99%

“…In the case of PET, the major factor that will significantly increase the homogeneity of the bitumen-plastomer mixture is the level of feed shredding. The literature reports adding PET into bitumen by incorporating > 1 mm flakes into bitumen mixtures [31,32] or incorporating it as a material with a high shredding level (<1.18 mm) added directly to the bitumen [33,34]. In the latter case, the plastomer dosage is usually up to 6% by weight of bitumen [35].…”

Section: Introductionmentioning

confidence: 99%

“…To the best of the authors' knowledge, very few comprehensive studies on PET-modified bitumen focusing on the mixing process with different plastomers and bitumens have been published so far. PET waste management is one of the biggest environmental challenges today, and promising test results should encourage further research [34,37]. Incorporating waste PET into bituminous mixtures has already attracted considerable interest [38].…”

Section: Introductionmentioning

confidence: 99%

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

Mazurek,

Buczyński,

Iwański

et al. 2023

Materials

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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.

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Section: Bitumenmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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

Mazurek,

Buczyński,

Iwański

et al. 2023

Materials

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“…The higher the penetration value, the softer the sample should be. Along with the addition of plastic content, the penetration value will decrease, causing the modified bitumen to become harder [34][35][36][37][38][39][40]. Based on the standard requirements by the Ministry of Public Works and Public Housing, polymer asphalt has a penetration value of 40-80 [6].…”

Section: Figure 7 Ftir Spectra Curve At Peak Ch2a and Ch3smentioning

confidence: 99%

Effect of Cold Plasma Treatment on Physical Properties of Multilayer Plastics for Polymer Asphalt Applications

et al. 2022

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Multilayer plastic waste continues to increase due to the ever-growing consumption and needs of the global citizen and is one of the most challenging types of waste to recycling because of its nature. The accumulation and indiscriminate disposal of waste can pose a potential risk of environmental problems. A solution that can be implemented is to mix bitumen and waste polymer as asphalt manufacturing. Despite its advancement in research, many potential parameters are still to be discovered to achieve optimal results. Through cold plasma treatment, a surface treatment may occur at the multilayer polypropylene that causes the change from hydrophobic to hydrophilic properties. Treating the polymer with cold plasma will provide good hydrophilic properties without changing the overall chemical and thermal properties of the sample. This will result in an alternative aggregate for the bitumen for asphalt manufacturing. Bitumen coupled with the addition of plastic still provides an optimal hardness and ductility, meanwhile having a more economically viable manufacturing process than other processes.

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