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.

Morphological and Flame Retardant Behaviors of Rubber-Modified Asphalt

2012 ◽  
Vol 501 ◽  
pp. 532-537 ◽  
Author(s):  
Jyotishmoy Borah ◽  
Chuan Sheng Wang
Keyword(s):  
Flame Retardancy ◽  
Asphalt Mixture ◽  
Antimony Oxide ◽  
Asphalt Mixtures ◽  
Fire Retardancy ◽  
Modified Asphalt ◽  
Fundamental Properties ◽  
Waste Rubber ◽  
Dsc Analyses ◽  
Chemical Mixing

Rubber modified asphalt mixtures were prepared by reaction of asphalt by chemical mixing with waste rubber. The fundamental properties like homogeneity, thermal etc. of the modified asphalt mixture was investigated by using different techniques like SEM, TGA, DSC analyses etc. The flame retardancy of mixtures was investigated LOI tester. Results shows that antimony oxide is marginally better fire retardancy to asphalt blends than magnesium oxide Mg(OH)2

Microstructure and Temperature Characterization of Compound Crumb Rubber Modified Asphalt

2014 ◽  
Vol 1052 ◽  
pp. 382-386 ◽  
Author(s):  
Lan Wang ◽  
Jiang San Hu ◽  
Gang Chen
Keyword(s):  
Complex Modulus ◽  
Crumb Rubber ◽  
Dynamic Shear ◽  
Rotational Viscometer ◽  
Rubber Powder ◽  
Modified Asphalt ◽  
Rubber Particles ◽  
Powder Content ◽  
Rotary Viscometer

Compound Crumb Rubber Modified Asphalt (CCRMA) is a mixture of waste rubber tire powder, SBS modifier and asphalt in order to modify the characteristics of asphalt. The application of using crumb rubber powder in making CCRMA is important in improvement of working characteristics of asphalt as well as in pollution control and environment protection. CCRMA, crumb rubber particles, SBS modifier and base asphalt have been examined by Scanning Electron Microscope (SEM) to observe the microcosmic appearance and the characteristic distribution of crumb rubber particles and SBS modifier in asphalt. The rotary viscometer test and dynamic shear test of CCRMA were carried out by rotational viscometer and Dynamic Shear Rheology (DSR). The influences of rubber powder content and reaction time to viscosity of CCRMA have been studied. In the stage of current study, complex modulus and phase angle of CCRMA are parameters reflecting viscoelasticity, the relation between them and temperature are researched.

scholarly journals Preliminary Study on the Utilization of RHA as a Performance Enhancer for Rubber Mortar

Materials ◽  
2021 ◽  
Vol 14 (12) ◽  
pp. 3216
Author(s):  
Jin Li ◽  
Peiyuan Chen ◽  
Haibing Cai ◽  
Ying Xu ◽  
Chunchao Li
Keyword(s):  
Compressive Strength ◽  
Mechanical Strength ◽  
Rice Husk ◽  
Rice Husk Ash ◽  
Capillary Absorption ◽  
Optimal Dosage ◽  
Positive Effects ◽  
Waste Rubber ◽  
Chloride Resistance ◽  
Preliminary Study

In this study, rice husk ash (RHA) was explored as a strength enhancer for mortars containing waste rubber. The effects of RHA on the flow, mechanical strength, chloride resistance, and capillary absorption of rubber mortar were investigated by substituting up to 20% cement with RHA. The experimental results showed that the incorporation of rubber into mortar could be safely achieved by adding RHA as a cement substitute by up to 20% without compromising the compressive strength of mortar. Moreover, the RHA also exerted positive effects on the enhancement of the chloride resistance as well as the capillary absorption of rubber mortars, for which 15% RHA was found to be the optimal dosage.

scholarly journals Value-Added Application of Waste Rubber and Waste Plastic in Asphalt Binder as a Multifunctional Additive

Materials ◽  
2019 ◽  
Vol 12 (8) ◽  
pp. 1280 ◽  
Author(s):  
Tianqing Ling ◽  
Ya Lu ◽  
Zeyu Zhang ◽  
Chuanqiang Li ◽  
Markus Oeser
Keyword(s):  
Mechanical Properties ◽  
Fatigue Life ◽  
Waste Treatment ◽  
Treatment Approach ◽  
Asphalt Binder ◽  
Value Added ◽  
Scanning Calorimetry ◽  
Multifunctional Additive ◽  
Waste Plastic ◽  
Waste Rubber

The feasibility and effectivity of recycling waste rubber and waste plastic (WRP) into asphalt binder as a waste treatment approach has been documented. However, directly blending WRP with asphalt binder brings secondary environmental pollution. Recent research has shown that the addition of WRP into asphalt binder may potentially improve the workability of asphalt binder without significantly compromising its mechanical properties. This study evaluates the feasibility of using the additives derived from WRP as a multifunctional additive which improves both the workability and mechanical properties of asphalt binder. For this purpose, WRP-derived additives were prepared in laboratory. Then, three empirical characteristics—viscosity, rutting factor, fatigue life were analyzed. Fourier transform infrared spectroscopy (FTIR) and differential scanning calorimetry (DSC) were employed to evaluate the effect of WRP-derived additive on the workability and chemical and mechanical properties of base binder. The dispersity of WRP-derived additive inside asphalt binder was also characterized using fluorescence microscope (FM). Results from this study showed that adding WRP-derived additive increases the workability of base binder. The WRP-derived additive appears positive on the high- and low- temperature performance as well as the fatigue life of base binder. The distribution of the WRP-derived additive inside base binder was uniform. In addition, the modification mechanism of WRP-derived additive was also proposed in this paper.

scholarly journals Evaluation of bitumen physical properties modified with waste plastic pipes

2018 ◽  
Vol 45 (6) ◽  
pp. 469-477 ◽  
Author(s):  
Sevil Köfteci ◽  
Perviz Ahmedzade ◽  
Taylan Günay
Keyword(s):  
Low Temperature ◽  
Physical Properties ◽  
Test Results ◽  
Dynamic Shear ◽  
Modified Bitumen ◽  
Bending Beam Rheometer ◽  
Waste Plastic ◽  
Plastic Pipes ◽  
Low Temperature Cracking ◽  
Rotational Viscosity

The aim of this paper is to examine the effects of ground plastic pipe wastes on bitumen. For this purpose, three modified bitumen samples with modifier contents of 2%, 4%, and 6% along with pure bitumen were prepared and tested. To understand the effect of modifier on bitumen, conventional bitumen tests, rotational viscosity tests at 135 °C and 165 °C, dynamic shear rheometer tests at three different frequencies that represent three different traffic speeds, and bending beam rheometer (BBR) test were performed. The BBR test results showed that resistance of pure bitumen to low-temperature cracking increased by using additives up to 4%. Based on the results of this study, it can be said that waste plastic pipes can be used as modifier for the bitumen binder. The 4% additive showed the best performance.

Effect of waste rubber particles on the mechanical performance and deformation properties of epoxy concrete for repair

2020 ◽  
Vol 241 ◽  
pp. 118008 ◽  
Author(s):  
Jianwen Shao ◽  
Han Zhu ◽  
Xian Zuo ◽  
Wolong Lei ◽  
Said Mirgan Borito ◽  
...  
Keyword(s):  
Mechanical Performance ◽  
Waste Rubber ◽  
Deformation Properties ◽  
Rubber Particles

scholarly journals Preparation of Octadecyl Amine Grafted over Waste Rubber Powder (ODA-WRP) and Properties of Its Incorporation in SBS-Modified Asphalt

Polymers ◽  
2019 ◽  
Vol 11 (4) ◽  
pp. 665 ◽  
Author(s):  
Meizhao Han ◽  
Xiang Zeng ◽  
Yaseen Muhammad ◽  
Jing Li ◽  
Jing Yang ◽  
...  
Keyword(s):  
Loss Modulus ◽  
Creep Recovery ◽  
Rubber Powder ◽  
Modified Asphalt ◽  
Grafting Reaction ◽  
Waste Rubber ◽  
Covalent Grafting ◽  
Waste Rubber Powder ◽  
Sbs Modified Asphalt ◽  
Octadecyl Amine

Through a covalent grafting reaction, octadecyl amine (ODA) was grafted on the surface of waste rubber powder (WRP) to obtain an ODA-WRP modifier, which was in turn compounded with a styrene-butadiene-styrene block copolymer (SBS) to prepare ODA-WRP/SBS-modified asphalt. The three major indicators (i.e., dynamic shear rheometer (DSR), multi-stress creep recovery (MSCR), and separation tests) showed that 1-ODA-WRP effectively improved the complex shear modulus (G*), elastic Modulus (G′), and loss modulus (G″) by 36.47%, 40.57%, and 34.77% (64 °C and 10 Hz), respectively, as compared to pristine SBS-modified asphalt. Fluorescence microscopy (FM) results concluded that the enhancement in mechanical properties was accredited to the better compatibility of various components in asphalt and establishment of network structure between ODA-WRP and SBS in ODA-WRP/SBS-modified asphalt. Fourier infrared spectroscopy (FT-IR) and scanning electron microscope (SEM) analyses confirmed the successful synthesis of ODA-WRP. This study could be of great help in synthesizing ODA-WRP asphalt modified with SBS for highways and construction applications.

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