Analysis of the Influence of Production Method, Plastic Content on the Basic Performance of Waste Plastic Modified Asphalt

Li, Haibin; Zhou, Lichang; Sun, Jianmei; Wang, Sirui; Zhang, Mingming; Hu, Yihong; Temitope, Ahmed Abdulakeem

doi:10.3390/polym14204350

Cited by 13 publications

(6 citation statements)

References 28 publications

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“…Moreover, asphalt containing PP and PE prepared by the orthogonal test was used to examine the mechanisms of dispersion and modification of plastic particles in modified asphalt. The outcomes showed that the modified samples showed better performance at high temperatures in comparison to the conventional asphalt sample [16]. Furthermore, the wet method has been used to assess the effects of adding different amounts of plastic cup.…”

Section: Introductionmentioning

confidence: 99%

Impact of Plastic Waste on The Volumetric Characteristics and Resilient Modulus of Asphalt Concrete

2023

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Recently, the use of plastic in many products has led to a huge amount of plastic waste, which is typically difficult to treat and expensive to recycle. This problem has been considered by many researchers and environmental organizations as requiring serious considerations about recycling and reusing plastic waste in different fields, such as asphalt mixtures. In this paper, aggregate passing a 4.75-mm sieve was replaced by 5, 7, 9, and 11% of plastic bottles used for drinking purposes. The dry method was adopted in this work, and the changes in the mixture’s volumetric properties were investigated using the Marshall method. A repeated indirect tensile load test was also conducted to determine the mixture’s resilient modulus. Marshall’s stability, air voids, unit weight, flow, and voids in mineral aggregates were examined. The results were compared and analyzed with the base sample. It was observed that adding plastic decreased aggregate consumption and reduced the optimum asphalt content (OAC). Additionally, the volumetric properties of the mixture improved and its service life was extended after adding plastic. It was also observed that the value of the resilient modulus (RM) increased when the percentage of added plastic increased as well. Reuse of plastic in asphalt mixtures achieves the concept of an environmentally friendly solution in the transportation area because it reduces the amount of asphalt and aggregates and reduces the costs of recycling plastic. Moreover, the optimal plastic content in this paper was achieved at 11%. Doi: 10.28991/CEJ-2023-09-04-012 Full Text: PDF

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Section: Introductionmentioning

confidence: 99%

Impact of Plastic Waste on The Volumetric Characteristics and Resilient Modulus of Asphalt Concrete

2023

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“…However, there has been a need for performance tests to ensure the satisfactory performance of the asphalt mixtures under in-service conditions [ 4 , 5 , 6 , 7 , 8 ]. A performance-based mix design (PBMD) determines the optimal proportions based on predicted performance, which balances competing demands for cracking and permanent deformation [ 9 , 10 ] because these two distresses are somewhat oppositely driven by the relative quantities of aggregate and asphalt binder [ 11 , 12 , 13 ]. This study suggests a PBMD framework that can support performance-related specification (PRS) required for the mathematic relationships between volumetric asphalt mix designs and predicted performance and develop a fatigue-preferred, rutting-preferred, performance-balanced mix designs that can reduce the critical structural distresses for long-life [ 7 , 11 , 13 , 14 ].…”

Section: Introductionmentioning

confidence: 99%

“…The PRS is a specification that describes the desired levels of key materials and construction quality characteristics that have been found to correlate with fundamental engineering properties that predict performance [ 15 ]. In order to support a PRS system, a PBMD framework can provide the mathematical models that explain the relationship between the acceptance quality characteristics (AQCs) and predicted performance for selected mixtures [ 2 , 11 , 12 , 16 ]. The volumetric and/or mechanical AQCs that can be measured during construction are also identified through the PBMD framework [ 1 , 7 , 16 , 17 , 18 , 19 ].…”

Section: Introductionmentioning

confidence: 99%

Developing Performance-Based Mix Design Framework Using Asphalt Mixture Performance Tester and Mechanistic Models

Lee¹,

Lee

2023

Polymers

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This paper proposes a performance-based mix design (PBMD) framework to support performance-related specifications (PRS) needed to establish relationships between acceptable quality characteristics (AQCs) and predicted performance, as well as to develop fatigue-preferred, rutting-preferred, and performance-balanced mix designs. The framework includes defining performance tests and threshold values, developing asphalt mix designs, identifying available performance levels, conducting sensitivity analysis, establishing the relationships between AQCs and predicted performance, and determining performance targets and AQC values for the three PBMDs using predicted performance criteria. Additionally, the framework recommends selecting the PBMD category for each asphalt layer to minimize pavement distresses. In this study, the proposed PBMD protocol was applied to FHWA accelerated loading facility (ALF) materials using asphalt mixture performance tester (AMPT) equipment coupled with mechanistic models. The study developed nine mix designs with varying design VMAs and air voids using the Bailey method. The cracking and rutting performance of the mix designs were determined by direct tension cyclic (DTC) fatigue testing, triaxial stress sweep (TSS) testing, and viscoelastic continuum damage (S-VECD) and viscoplastic shift models for temperature and stress effects. The study found that adjusting the design VMA was the primary way to achieve required performance targets. For fatigue-preferred mix design, the recommended targets were a cracking area of 0 to 1.9%, a rut depth of 10 mm, and a design VMA of 14.6 to 17.6%. For rutting-preferred mix design, the recommended targets were a cracking area of 18%, a rut depth of 0 to 3.8 mm, and a design VMA of 10.1 to 13.1%. For performance-balanced mix design, the recommended targets were a cracking area of 8.1 to 10.7%, a rut depth of 4.6 to 6.4 mm, and a design VMA of 12.6 to 14.3%. Finally, pavement simulation results verified that the proposed PBMD pavement design with fatigue-preferred mix in the bottom layer, performance-balanced mix in the intermediate layer, and rutting-preferred mix in the surface mix could minimize bottom-up cracking propagation without exceeding the proposed rutting performance criterion for long-life.

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“…In recent years, the recycling of waste materials has received increasing attention [ 1 , 2 , 3 , 4 ]. As the consumption of plastic products has increased, the amount of waste plastic has also increased [ 5 , 6 , 7 ]. It is estimated that the global production of waste plastics amounts to 300 million tons, but less than 20% of waste plastics are recycled.…”

Section: Introductionmentioning

confidence: 99%

Long-Term Aging Behavior of Plastic/Styrene Butadiene Rubber (SBR) Composite Modified Bitumen

Xing

Liu

et al. 2023

Materials

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The reuse of recycled waste plastics has long been attempted in pavement engineering as bitumen modifier. It was revealed that waste plastics can significantly enhance the high-temperature performance of bitumen and bitumen mixtures. Even so, the application of waste plastics as a bitumen modifier is still not widespread. This is attributable to the generally poor low-temperature performance of plastic-modified bitumen, which often fails to meet specification requirements. For this purpose, styrene butadiene rubber (SBR) was selected to improve the low-temperature performance of plastic-modified bitumen. However, due to the long-term aging process, the composite and structure of the modified bitumen will change, which negatively impacts its performance. The objective of this study is to investigate the long-term aging behavior of plastic/SBR composite-modified bitumen. For this purpose, waste polyethylene was used as a plastic modifier and was mixed with base bitumen and 3% SBR at ratios 4.5%, 6% and 7.5%. The rheological properties and molecular weight distribution of base bitumen, plastic and plastic/SBR-modified bitumen before and after long-term aging were measured. Results show that the incorporation of plastic can improve the complex modulus, rutting factor and percent recovery of bitumen and reduce the non-recoverable creep compliance of the bitumen, indicating the modification process enhances the high-temperature performance of bitumen. The enhancement effect is more pronounced with the increase of plastic content. For modified bitumen with 7.5% plastic modifier, the complex modulus of modified bitumen is increased by 1127.55% compared to base bitumen. The addition of 3% SBR modifier can further improve the high-temperature performance of the modified bitumen. In addition, the modification process also increases the large molecule size percentage (LMSP) and weight average molecular weight of bitumen. Compared with weight average molecular weight, the LMSP correlates well with the rheological properties of modified bitumen. In accordance with the complex modulus, using the LMSP and weight average molecular weight of bitumen before and after aging, the corresponding aging index was calculated. The quantitative results showed that the addition of plastic modifier can improve the aging resistance of bitumen, but the enhancement effect is not as obvious as that of SBR modifier.

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Analysis of the Influence of Production Method, Plastic Content on the Basic Performance of Waste Plastic Modified Asphalt

Cited by 13 publications

References 28 publications

Impact of Plastic Waste on The Volumetric Characteristics and Resilient Modulus of Asphalt Concrete

Impact of Plastic Waste on The Volumetric Characteristics and Resilient Modulus of Asphalt Concrete

Developing Performance-Based Mix Design Framework Using Asphalt Mixture Performance Tester and Mechanistic Models

Long-Term Aging Behavior of Plastic/Styrene Butadiene Rubber (SBR) Composite Modified Bitumen

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