Microscopic Mechanism of Direct-Input Waste Plastic Modified Asphalt

2022 ◽  
Vol 148 (2) ◽  
Author(s):  
Liting Yu ◽  
Lei Lyu ◽  
Rui Li ◽  
Yizhi Du ◽  
Jianzhong Pei
Keyword(s):  
Microscopic Mechanism ◽  
Waste Plastic ◽  
Modified Asphalt ◽  
Direct Input

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.

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 Effect of Warm-Mix Agent EC-120 on Performance of Asphalt Binder and Its Microscopic Mechanism

2019 ◽  
Vol 2019 ◽  
pp. 1-7 ◽  
Author(s):  
Tian Xiaoge ◽  
Ren Zhang ◽  
Yichao Xv ◽  
Yantian Chu ◽  
Zhen Yang ◽  
...  
Keyword(s):  
High Temperature ◽  
Low Temperature ◽  
Asphalt Binder ◽  
Warm Mix Asphalt ◽  
Performance Tests ◽  
Mixing Process ◽  
Microscopic Mechanism ◽  
Modified Asphalt ◽  
Infrared Spectrometer ◽  
Sbs Modified Asphalt

In order to figure out the influence of the warm-mix agent EC-120 on the performance of the asphalt binder and its micro mechanism in warm-mixing process, a matrix asphalt, A-70, and SBS-modified asphalt, SBS I-D, were modified with different contents of EC-120, respectively. Then, conventional macromechanic performance tests, dynamic shear rheological (DSR) test at high-temperature, and bending beam rheological (BBR) test at low-temperature were carried out on asphalt binder samples. Meanwhile, they were microscopically analyzed through Fourier transform infrared spectrometer (FTIR) and differential scanning calorimeter (DSC). The results indicated that EC-120 can reduce the viscosity of asphalt binder at high temperature. With the increase of EC-120 content, the high-temperature rutting resistance of two kinds of warm-mix asphalt (WMA) increased, but their crack resistance at low-temperature was reduced. FTIR indicated that this is due to the generation of oxides containing carbonyl functional groups after EC-120 was blended with asphalt binder. The DSC endothermic curves of WMA binders are obviously different from those of base binders, and a strong endothermic peak appears in the interval of 102°C–113°C, indicating that EC-120 will endothermically melt at the temperature of 102°C∼113°C, so it can play the role in reducing the viscosity of asphalt binder at the range of construction temperatures.

scholarly journals Evaluation of Properties and Mechanisms of Waste Plastic/Rubber-Modified Asphalt

Coatings ◽  
2021 ◽  
Vol 11 (11) ◽  
pp. 1365
Author(s):  
Xiaorui Zhang ◽  
Chao Han ◽  
Frédéric Otto ◽  
Fan Zhang
Keyword(s):  
Interaction Mechanism ◽  
Simulation Software ◽  
Optimal Dosage ◽  
Dynamic Shear ◽  
Waste Plastic ◽  
Modified Asphalt ◽  
Carbon Neutrality ◽  
Fundamental Properties ◽  
Waste Rubber ◽  
Rubber Particles

Waste plastic, such as polyethylene (PE), and waste rubber tires, are pollutants that adversely affect the environment. Thus, the ways these materials are used are important in realizing the goals of reduced CO2 emissions and carbon neutrality. This paper investigates the fundamental properties, compatibility, and interaction mechanism of waste plastic/rubber-modified asphalt (WPRMA). Dynamic shear rheology, fluorescence microscopy, a differential scanning calorimeter, and molecular dynamic simulation software were used to evaluate the properties and mechanisms of WPRMA. The results show that the anti-rutting temperature of WPRMA with different waste plastic contents is higher than 60 °C and the optimal dosage of waste PE in WPRMA is 8%, which can enhance the high-temperature properties and compatibility of rubber-modified asphalt. The temperature can directly promote the melting and decomposition of the functional groups in WPRMA and thus must be strictly controlled during the mix production process. The interaction mechanism suggests that waste plastic can form networks and package the rubber particles in rubber-modified asphalt. The main force between waste plastic and rubber is Van der Waals force, which rarely occurs in chemical reactions.

scholarly journals Characterization of thermal storage stability of waste plastic pyrolytic char modified asphalt binders with sulfur

PLoS ONE ◽  
2021 ◽  
Vol 16 (3) ◽  
pp. e0248465
Author(s):  
Abhinay Kumar ◽  
Rajan Choudhary ◽  
Ankush Kumar
Keyword(s):  
Storage Stability ◽  
Asphalt Binder ◽  
Principal Component ◽  
Thermal Storage ◽  
Asphalt Binders ◽  
Waste Plastic ◽  
Modified Asphalt ◽  
Modified Binders ◽  
Pyrolytic Char

Pyrolysis has gained a strong interest in recent times for sustainable treatment and recovery of energy-rich products from different wastes including plastic. Waste plastic pyrolytic char (PPC) generated as a carbonaceous by-product in the pyrolysis process, is gaining attention as an asphalt binder modifier. Adequate thermal storage stability is an essential requirement for a modified asphalt binder to ensure that the composite offers integrity and homogeneous properties during its storage, handling and transportation in the field. The objective of this study was to evaluate and characterize the thermal storage stability properties of PPC modified binders. PPC modified asphalt binders were fabricated and evaluated at multiple dosages of sulfur as a cross-linking agent. In addition to the conventionally used softening point difference (SPD), characterization of thermal storage stability was attempted using rheology-based separation indices (SIs) derived through temperature sweep, frequency sweep, and multiple stress creep and recovery (MSCR) tests. These rheological SIs were based on complex modulus (G*), Superpave rutting parameter (G*/sin δ), Shenoy rutting parameter (SRP), zero shear viscosity (ZSV), and MSCR Jnr (at three stress levels 0.1, 3.2 and 10 kPa). Two formulations of each rheology-based separation index were studied: (1) ratio, and (2) maximum-average difference formulations. The temperature and frequency dependencies of rheological SIs were also evaluated. Further, the Fourier transform infrared spectroscopy (FTIR) was used to characterize storage stability by comparing the chemical functionalities of the PPC modified binders. A 0.3% dosage of sulfur was found to produce the best results considering all SPD, rheology-based SIs and FTIR. Principal component analysis showed that the ratio and maximum-average formulations had similar contributions to the first principal component accounting for more than 99% of the variability.

Compound Modified Asphalt Performance Research

2012 ◽  
Vol 446-449 ◽  
pp. 454-457
Author(s):  
Wen Yi ◽  
Huai Wei Hu ◽  
Yong He Wang ◽  
Chang Zi Qu
Keyword(s):  
Operational Performance ◽  
Environment Pollution ◽  
Appraisal System ◽  
Bituminous Mixture ◽  
Waste Plastic ◽  
Rubber Powder ◽  
Modified Asphalt ◽  
Asphalt Performance ◽  
Asphalt Concrete Pavement ◽  
Performance Research

The scrap rubber powder and the waste plastic compound modified bituminous mixture are used in the first-class highway asphalt concrete pavement. They can not only reduce the environment pollution, but also enhance the operational performance of bituminous pavement. It has the economical, social and the environment three aspect remarkable benefit. This article uses the appraisal system of the rubber asphalt to test the compound modified asphalt performance with the different rubber powder quantity and the waste plastic quantity in different mixture temperature and the time. By text, we can determine the best quantity of the waste plastic.

Sign in / Sign up

Export Citation Format

Share Document