scholarly journals The Effect of Waste Plastics on the Ageing Phenomenon of Bituminous Binders and Asphalt Mixtures

Materials ◽  
2021 ◽  
Vol 14 (20) ◽  
pp. 6176
Author(s):  
Finn Hall ◽  
Greg White
Keyword(s):  
Environmental Sustainability ◽  
Asphalt Mixture ◽  
Construction Materials ◽  
Asphalt Mixtures ◽  
Engineering Industry ◽  
Waste Plastics ◽  
Waste Plastic ◽  
Age Related ◽  
Bituminous Binders ◽  
Ageing Phenomenon

The push for environmental sustainability in the civil engineering industry has resulted in an increased interest in the use of recycled construction materials, with one example being the use of waste plastic for the modification of bituminous binder in asphalt mixtures. Existing research has associated waste plastics with various binder and asphalt mixture performance enhancing properties. However, there is a lack of research on the age-related durability of waste plastic-modified roads. This research compared the effect of commercially available waste plastic binder modifiers on the ageing phenomenon of bituminous binders and asphalt mixtures, to the effect of conventional polymers SBS and EVA, through artificial bituminous binder and asphalt mixture ageing performed in a laboratory. The addition of polymers (both waste and virgin) resulted in an increase in binder stiffness after short-term ageing as the polymer content increased. The effect of the waste plastic on ageing was comparable to the effects associated with the conventional polymers, and it was concluded that the waste plastic binder modified products should be considered sustainable alternatives to standard polymers for bituminous binder and asphalt mixture modification.

scholarly journals Stiffness and Fatigue of Asphalt Mixtures for Pavement Construction

2018 ◽  
Vol 26 (2) ◽  
pp. 24-29 ◽  
Author(s):  
Juraj Šrámek
Keyword(s):  
Fatigue Life ◽  
Asphalt Mixture ◽  
Construction Materials ◽  
Test Methods ◽  
Asphalt Mixtures ◽  
Bending Test ◽  
Deformation Properties ◽  
Pavement Construction ◽  
And Control

AbstractThe quality of a road is affected by its correct design, the appropriate use of materials, the effects of the climate, and the technological discipline. The deformation properties and fatigue of asphalt layers are important for the design and assessment of semi-rigid and flexible pavements. The assessment of deformation properties is performed by means of a dynamic impact test and the fatigue life of a particular asphalt mixture. An evaluation of the fatigue life is based on decreases in resistance or increases in deformations in different binders and mixtures. The test methods for the design and control of pavement construction materials determine the basic conditions valid for flexible matter. The Two-Point Bending Test was used for determining the deformation characteristics and the fatigue of asphalt mixtures at the Department of Construction Management in Zilina.

A Review of the Utilisation of Recycled Waste Material as an Alternative Modifier in Asphalt Mixtures

2020 ◽  
Vol 6 ◽  
pp. 42-60
Author(s):  
Abdalrhman Abrahim Milad ◽  
Ahmed Suliman B. Ali ◽  
Nur Izzi Md Yusoff
Keyword(s):  
Mechanical Performance ◽  
Permanent Deformation ◽  
Steel Slag ◽  
Asphalt Mixture ◽  
Construction Materials ◽  
Crumb Rubber ◽  
Asphalt Mixtures ◽  
Waste Material ◽  
Waste Materials ◽  
The Road

The possibility of using waste materials in road construction is of great interest as their utilisation may contribute to reducing the problems of hazard and pollution and conserve natural resources. Thus, there is an urgent need to find a sustainable method for using waste materials as a substitute in the standard asphalt binders. There are several concerns about the physical and chemical properties and mechanical performance of asphalt pavements incorporated with waste material in the effort to reduce permanent deformation of the road surface. This review article presents a brief discussion of the asphalt mixtures modified with waste material, and the recycled materials used as a modifier in the asphalt mixture. The present paper summarises the use of crumb rubber, crushed concrete, steel slag, glass fibre and plastic waste in asphalt mixtures. The use of waste materials as a modifier in asphalt mixture resulted in improved asphalt pavement performance. Results advocate that rubberised asphalt mixture with desired properties can be designed as an additive with a friendly environmental approach in construction materials. The researches that adopted the influence of usage, recycle waste material to improve the performance of the asphalt of the road are still limited compared to other construction fields. Doi: 10.28991/cej-2020-SP(EMCE)-05 Full Text: PDF

Study on Dynamic Modulus of Waste Plastic Modified Asphalt Mixture Using Waste Plastic Bag Chips

2011 ◽  
Vol 261-263 ◽  
pp. 824-828 ◽  
Author(s):  
Qian Zhang ◽  
Shu Wei Goh ◽  
Zhan Ping You
Keyword(s):  
Phase Angle ◽  
Dynamic Modulus ◽  
Asphalt Mixture ◽  
Control Sample ◽  
Asphalt Mixtures ◽  
Test Results ◽  
Waste Plastic ◽  
Modified Asphalt ◽  
Plastic Bag ◽  
Dynamic Modulus Test

The objective of this study is to investigate the possibility of using waste plastic as an additive to modify asphalt mixtures thereby reducing the waste plastic stream in our environment. High density polyethylene plastic bags obtained from the retail store were shredded into chips and added into asphalt mixtures at the rate of 0% (control sample), 2, 5 and 8% based on binder weight. Three different temperatures of 4, 21.3 and 39.2°C and frequencies ranging from 0.1 to 25 Hz were used in the dynamic modulus test. It was found that most of the asphalt mixtures modified with waste plastic have higher dynamic modulus when compared with the control samples. However, no significant trend on phase angle was found among all the samples tested based on the test results. In this study, it was found that the modified asphalt mixture with 2% waste plastic had the highest dynamic modulus and phase angle. Based on the test results, it was found that plastic modified asphalt mixture will have a better performance under intermediate and high temperature conditions.

THE USE OF MIXED WASTE RECYCLED PLASTIC AND GLASS AS AN AGGREGATE REPLACEMENT IN ASPHALT MIXTURES

2017 ◽  
Vol 80 (1) ◽  
Author(s):  
Nur Mustakiza Zakaria ◽  
Mohammad Kamal Hassan ◽  
Ahmad Nazrul Hakimi Ibrahim ◽  
Sri Atmaja P. Rosyidi ◽  
Nur Izzi Md. Yusoff ◽  
...  
Keyword(s):  
Resilient Modulus ◽  
Liquid Crystal Display ◽  
Asphalt Mixture ◽  
Control Sample ◽  
Asphalt Mixtures ◽  
Waste Plastics ◽  
Recycled Glass ◽  
Materials Used ◽  
Marshall Stability

One of the major problems with landfills is that they contain a large amount of solid wastes. Waste plastics and glasses contribute greatly to this problem, and these materials need to be managed or recycled to extend the life of landfill sites. Hence, this study was conducted to investigate the feasibility of using these waste materials in asphalt mixtures for pavement applications. Various types of recycled waste plastics and glasses were selected for this study and the mix containing these materials was designed by the Marshall method. Three types of glass were used: bottle glass, liquid-crystal display (LCD) glass, and sheet glass. In terms of the total weight of the asphalt mixtures, approximately 5% constituted of recycled materials used as an aggregate replacement. In this study, asphalt mixtures were aged in the laboratory to simulate the site conditions of short-term and long-term ageing. After the ageing process, samples were tested for asphalt mixture performance characteristics in terms of the following parameters: Marshall Stability and Flow, Marshall Quotient and resilient modulus. It was found that the replacement combining 1% recycled plastic and 4% recycled glass shows almost similar and satisfactory results compared to the control sample for all tests. Therefore, recycled plastic and recycled glass, when optimally blended, can be considered feasible to be used as an aggregate replacement in asphalt mixtures for flexible road pavements.

scholarly journals Laboratory Properties of Waste PET Plastic-Modified Asphalt Mixes

Recycling ◽  
2021 ◽  
Vol 6 (3) ◽  
pp. 49
Author(s):  
Nuha Mashaan ◽  
Amin Chegenizadeh ◽  
Hamid Nikraz
Keyword(s):  
Asphalt Mixture ◽  
Cost Effective ◽  
Economic Benefits ◽  
Asphalt Mixtures ◽  
Engineering Properties ◽  
Elastic Behaviour ◽  
Modified Bitumen ◽  
Major Drawback ◽  
Waste Plastic ◽  
Modified Asphalt

Commercial polymers have been used in pavement modification for decades; however, a major drawback of these polymers is their high cost. Waste plastic polymers could be used as a sustainable and cost-effective additive for improving asphalt properties, attaining combined environmental–economic benefits. Since 2019, in Australia, trial segments of roads have been built using waste materials, including plastic, requiring that laboratory evaluations first be carried out. This study aims to examine and evaluate the effect of using a domestic waste plastic, polyethylene terephthalate (PET), in modifying C320 bitumen. The assessment of several contents of PET-modified bitumen is carried out in two phases: modified bitumen binders and modified asphalt mixtures. Dynamic shear rheometer (DSR) and rolling thin film oven tests (RTFOT) were utilised to investigate the engineering properties and visco-elastic behaviour of plastic-modified bitumen binders. For evaluating the engineering properties of the plastic-modified asphalt mixtures, the Marshall stability, Marshall flow, Marshall quotient and rutting tests were conducted. The results demonstrated that 6–8% is the ideal percentage of waste plastic proposed to amend and enhance the stiffness and elasticity behaviour of asphalt binders. Furthermore, the 8% waste PET-modified asphalt mixture showed the most improvement in stability and rutting resistance, as indicated by increased Marshal stability, increased Marshall quotient and decreased rut depth. Future fatigue and modulus stiffness tests on waste plastic-modified asphalt mixtures are suggested to further investigate the mechanical properties.

scholarly journals The Impact of Recycled Concrete Aggregate on the Stiffness, Fatigue, and Low-Temperature Performance of Asphalt Mixtures for Road Construction

2020 ◽  
Vol 12 (10) ◽  
pp. 3949 ◽  
Author(s):  
Aleksandar Radević ◽  
Ivan Isailović ◽  
Michael P. Wistuba ◽  
Dimitrije Zakić ◽  
Marko Orešković ◽  
...  
Keyword(s):  
Low Temperature ◽  
Environmental Sustainability ◽  
Construction Materials ◽  
Physical And Mechanical Properties ◽  
Asphalt Mixtures ◽  
Recycled Concrete ◽  
Concrete Aggregate ◽  
Recycled Concrete Aggregate ◽  
Road Asphalt ◽  
The Impact

The need for road (re)construction materials is constantly growing. At the same time, there is a limited quantity of new, high-quality materials available and a buildup of secondary/recycled construction materials. One possible solution may be the use of recycled concrete aggregate (RCA) in asphalt mixtures instead of natural aggregate (NA), which also promotes economic and environmental sustainability. The potential use of fine and coarse RCA in road asphalt mixtures is analyzed in this work. Nine asphalt mixtures were tested for base course layers, where RCA was used as a NA substitute. The impact of the quantity of RCA (up to 45% by mass) on the resulting physical and mechanical properties of asphalt mixtures was investigated, and consequently compared with the properties of a reference control mixture produced with NA only. Results reveal that the addition of RCA requires higher bitumen in comparison to the control mixture (up to 1%). Consequently, mixtures with RCA had 15−20% lower stiffness and up to 26% higher critical fatigue strain value (ε6). Although RCA mixtures contained more bitumen, their low-temperature resistance was slightly inferior compared with the control mixture (failure temperatures were up to 4.3 °C higher). In conclusion, asphalt mixtures with up to 45% RCA can be used without substantially reducing performance.

scholarly journals Selection of Constituent Materials for Asphalt Mixtures of Noise-Reducing Asphalt Pavements

2019 ◽  
Vol 14 (2) ◽  
pp. 178-207 ◽  
Author(s):  
Audrius Vaitkus ◽  
Ovidijus Šernas ◽  
Viktoras Vorobjovas ◽  
Judita Gražulytė
Keyword(s):  
Asphalt Pavement ◽  
Traffic Noise ◽  
Asphalt Mixture ◽  
Mixture Design ◽  
Asphalt Mixtures ◽  
Cold Climate ◽  
Asphalt Pavements ◽  
Test Results ◽  
Bituminous Binders ◽  
Selection Of

Road traffic noise is a widespread problem, especially in the densely populated cities of Europe. Exposure to high levels of (traffic) noise leads to health problems, such as stress, sleep disturbance and even heart diseases. Noise-reducing asphalt pavements are more frequently developed and selected as a first noise abatement solution. Performance of noise-reducing asphalt pavement depends on the composition and properties of asphalt mixture components, and pavement properties such as layer thickness, voids in pavement, texture. Design of asphalt mixture for the noise-reducing asphalt pavements is even more complicated for severe and cold climate regions where significant temperature fluctuations and many of frost-thaw cycles occur. Thus, the balance between mechanical and acoustical durability depends on the proper selection of asphalt mixture components. Components of these asphalt mixtures have primarily to be tested to determine their physical and mechanical properties. The main aim of this research is to evaluate properties of local aggregates, bituminous binders, and regarding test results, select the most suitable materials for the design of high-quality, durable asphalt mixture for noise-reducing asphalt pavements. The research showed that Granite A is the most suitable aggregate for the design of asphalt mixtures for noise-reducing asphalt pavement. Short-term and particularly long-term ageing of polymer modified bituminous binder PMB 45/80-65 and PMB 25/55-60 decreases the number of aromatics and increases the amount of resins. Based on Multiple Stress Creep and Recovery test results, it is assumed that all bituminous binders selected for research are suitable for the asphalt mixture design of noise-reducing asphalt pavement in terms of resistance to rutting. However, considering all tests results, bituminous binder PMB 45/80-65 (1) showed the best performance and was the most suitable for the asphalt mixture design of noise-reducing asphalt pavement.

scholarly journals Integrating Circularity in the Sustainability Assessment of Asphalt Mixtures

2020 ◽  
Vol 12 (2) ◽  
pp. 594 ◽  
Author(s):  
Konstantinos Mantalovas ◽  
Gaetano Di Mino
Keyword(s):  
Environmental Sustainability ◽  
Sustainability Assessment ◽  
Permanent Deformation ◽  
Asphalt Mixtures ◽  
Environmental Benefits ◽  
Engineering Industry ◽  
Road Engineering ◽  
Support Tool ◽  
The Road ◽  
Circularity Index

Rising concerns about the impacts that the road engineering industry is imposing to the environment have redirected national road authorities to firmly re-consider the sustainability implications of their operations. Lately, though, sustainability has established a forceful correlation with the Circular Economy and its principles. The road engineering industry, therefore, is moving towards more circular approaches. However, this is occurring without the assessment of the potential impacts of such a transition. For this reason, in this study, a composite indicator, namely, Environmental Sustainability and Circularity indicator (ESCi), for investigating the potential effects that increased circularity could have at the environmental sustainability of asphalt mixtures is developed. It can be utilized as a decision-making support tool from stakeholders involved in both asphalt mixture production and road pavement management. In addition, in this study, four asphalt mixtures with different percentages of Reclaimed Asphalt (RA) were assessed in terms of their “cradle-to-gate” environmental impacts and circularity, by means of Life Cycle Assessment, and Material Circularity Index, respectively. Their fatigue and permanent deformation performances play a key role in the assessment and distinctive results obtained for the asphalt mixtures with increasing RA% and thus, significant environmental benefits and increased circularity are observed after specific RA% thresholds.

Design of Asphalt Mixtures with 30% of RCA as Replacement of Natural Aggregate by Means Marshall Methodology

2018 ◽  
Vol 940 ◽  
pp. 128-132 ◽  
Author(s):  
Carlos Uriel Espino González ◽  
Wilfrido Martínez Molina ◽  
Hugo Luis Chávez García ◽  
Judith Alejandra Velázquez Perez ◽  
Rosalía Ruiz Ruiz ◽  
...  
Keyword(s):  
Civil Engineering ◽  
Asphalt Mixture ◽  
Construction Materials ◽  
Asphalt Mixtures ◽  
Recycled Concrete ◽  
Concrete Aggregate ◽  
Recycled Concrete Aggregate ◽  
Natural Aggregate ◽  
Ancient Times ◽  
Environmental Savings

Materials play a fundamental role in any branch of civil engineering. From ancient times to the present day, society has required enormous amounts of construction materials, which implies an excessive exploitation of materials that come directly from nature. This paper explains the main differences, similarities, benefits and characteristics of the 2 designs of asphalt mixtures by means Marshall methodology. The first design is for control mixture, which was elaborated with a conventional asphalt AC-20 and 100% of natural aggregate (NA). The second design is for asphalt mixture with 30% of recycled concrete aggregate (RCA) and 70% of NA. Finally, it was determined that both designs have similar characteristics, which indicates that the use of 30% RCA in asphalt mixtures is adequate. In addition, it represents economic and environmental savings.

scholarly journals Using Waste Plastics as Asphalt Modifier: A Review

Materials ◽  
2021 ◽  
Vol 15 (1) ◽  
pp. 110
Author(s):  
Fengchi Xu ◽  
Yao Zhao ◽  
Kangjian Li
Keyword(s):  
High Performance ◽  
Asphalt Mixtures ◽  
Environmental Benefits ◽  
Asphalt Binders ◽  
Utilization Rate ◽  
Waste Plastics ◽  
Waste Products ◽  
Waste Plastic ◽  
Modified Asphalt ◽  
Temperature Performance

The use of waste products in the production of asphalt binders and asphalt mixtures has become widespread due to economic and environmental benefits. In particular, the use of recycled waste plastic in asphalt binders and mixtures is gaining more attention. This review presents analyses and comparisons of various forms of waste plastic used in asphalt modification, and approaches to incorporating waste plastic into asphalt mixtures, both for single and composite modifications. It focuses on the properties of waste plastics, asphalt binders, and asphalt mixtures. Overall, the incorporation of plastic waste into asphalt mixtures can significantly improve high-temperature performance and has potential economic and environmental benefits. The performance of modified asphalt is highly dependent on multiple factors, such as waste sources, waste plastic dosages, blending conditions, and the pretreatment methods for waste plastic. There are different ways to apply waste plastics to blend into a mixture. In addition, this paper discusses the current challenges for waste plastic-modified asphalt, including the stability, low-temperature performance, modification mechanism, and laboratory problems of the blends. The use of chemical methods, such as additives and functionalization, is considered an effective way to achieve better interactions between waste plastics and the binder, as well as achieving a higher sufficiency utilization rate of waste plastics. Although both methods provide alternative options to produce waste plastic-modified asphalt with stability and high performance, the optimal proportion of materials used in the blends and the microcosmic mechanism of composite modified asphalt are not clear, and should be explored further.

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