scholarly journals Study on Tyre Rubber Modified Bitumens Mix for Road Asphalt Mixtures

2021 ◽  
Vol 9 (9) ◽  
pp. 2170-2182
Author(s):  
Shantanu Prajapati
Keyword(s):  
Bulk Density ◽  
Crumb Rubber ◽  
Asphalt Mixtures ◽  
Rubber Crumb ◽  
Road Asphalt ◽  
Waste Crumb Rubber ◽  
Mineral Aggregates

Abstract: In this study the strength & stability characteristics of bituminous mix for 80/100 grade bitumen is to studied and the effect of waste crumb rubber strength and stability characteristics in Bituminous mix and rubber bituminous mix is analyzed. Keywords: voids in mineral aggregates (VMA), voids filled with bitumen (VFB) Method, Crumb rubber, Crumb rubber bituminous mix, stability, flow, Bulk Density

scholarly journals Functionalization of Crumb Rubber Surface for the Incorporation into Asphalt Layers of Reduced Stiffness: An Overview of Existing Treatment Approaches

Recycling ◽  
2021 ◽  
Vol 6 (1) ◽  
pp. 19
Author(s):  
Christina Makoundou ◽  
Kenth Johansson ◽  
Viveca Wallqvist ◽  
Cesare Sangiorgi
Keyword(s):  
Gamma Ray ◽  
Crumb Rubber ◽  
Contaminant Removal ◽  
Surface Adhesion ◽  
Asphalt Mixes ◽  
Plastic Recycling ◽  
Physical Treatments ◽  
Uv Ozone ◽  
Reactive Properties ◽  
Mineral Aggregates

The substitution of mineral aggregates with crumb rubber (CR) from waste end-of-life tires (ELTs) in the asphalt concretes, has been considered a sustainable paving industry approach. The rubber has been used to construct pavements with proven enhanced resilience and improved durability. However, some issues related to the rubber’s surface adhesion or swelling may arise with these practices and generate complications (binder consumption, temperatures, mixing times). One possible solution to overcome the materials’ compatibility problems is to pre-treat the CR’s surface before its incorporation into the asphalt mixes to allow a surface functionalization that can enhance coverage and cohesion inside the mixes. The physical treatments using radiations-based beam are already exploited in the plastic recycling industries avoiding the use of chemicals in considerable amounts. Such treatments permit the recovering of large quantities of polymer-based materials and the enhancement of interfacial properties. This article provides an overview of existing surface treatments of polymers and especially rubber, including gamma ray, UV-ozone, microwaves, and plasma. Several studies have shown an overall improvement of the rubber surface’s reactive properties due to contaminant removal or roughness enhancement attributed to cross-linking or scission reactions occurring on the rubber’s surface layer. With those properties, the asphalt mixes’ phase stability properties are increased when the pre-treated rubber is incorporated. The treatments would permit to increase the CR quantities, yet reduce the layer stiffness, and improve the durability and the sustainability of future advanced road pavements.

Recycling of waste crumb rubber into a commercial materials

2021 ◽  
Author(s):  
S. Godwin Barnabas ◽  
K. Arun Vasantha Geethan ◽  
M. Venkatesh Perumal
Keyword(s):  
Crumb Rubber ◽  
Waste Crumb Rubber

scholarly journals Functional and environmental performance of plant-produced crumb rubber asphalt mixtures using the dry process

2021 ◽  
Vol 54 (5) ◽  
Author(s):  
M. Bueno ◽  
R. Haag ◽  
N. Heeb ◽  
P. Mikhailenko ◽  
L. Boesiger ◽  
...  
Keyword(s):  
Environmental Performance ◽  
High Performance ◽  
Large Scale ◽  
Fatigue Behavior ◽  
Permanent Deformation ◽  
Asphalt Mixture ◽  
Crumb Rubber ◽  
Asphalt Mixtures ◽  
Gaseous Emissions ◽  
Dry Process

AbstractIncorporating crumb rubber (CR) using the dry process, directly in the asphalt mixture rather than into the bituminous binder requires no plant retrofitting, and therefore is the most practical industrial method for CR incorporation into asphalt mixtures. Nevertheless, very few large scale studies have been conducted. This work uses a holistic approach and reports on the functional and environmental performance of asphalt mixtures with different concentrations of CR fabricated employing the dry process in asphalt plants. Gaseous emissions were monitored during the production and laboratory leaching tests simulating the release of pollutants during rain, was conducted to evaluate the toxicology of both the CR material alone and the modified asphalt mixtures. In addition, laboratory compacted samples were tested to assess their fatigue behavior. Furthermore, noise relevant surface properties of large roller compacted slabs were evaluated before and after being subjected to a load simulator (MMLS3) to evaluate their resistance to permanent deformation. The results confirm that comparable performance can be achieved with the incorporation of CR using the dry process for high performance surfaces such as semi-dense asphalt, which usually require the use of polymer modified binders. Environmental performance improvement can be achieved by a washing step of the CR material that could remove polar CR additives which have commonly been used as vulcanization accelerator during rubber production.

Fatigue properties of crumb rubber asphalt mixtures used in railways

2018 ◽  
Vol 184 ◽  
pp. 248-257 ◽  
Author(s):  
Seyed Mohammad Asgharzadeh ◽  
Javad Sadeghi ◽  
Pooneh Peivast ◽  
Makan Pedram
Keyword(s):  
Crumb Rubber ◽  
Asphalt Mixtures ◽  
Fatigue Properties

scholarly journals The Rationale for the Use of Modified Bitumen Coated Overburden Rocks for Haul Roads of Coal Mines

2019 ◽  
Vol 105 ◽  
pp. 01018
Author(s):  
Sergey Ivanov ◽  
Nikita Martel
Keyword(s):  
Chemical Composition ◽  
Production Rate ◽  
Coal Mining ◽  
Coal Mine ◽  
Crumb Rubber ◽  
Rubber Crumb ◽  
Modified Bitumen ◽  
Secondary Material ◽  
Adhesion Ability ◽  
Physical And Chemical

Kuzbass is a leader in the field of mining of coal as one of the main materials for industry and civilian use. Its production rate its is constantly increasing, which can not but affect the problem of using secondary material (in particular, rocks that are not used in further construction) that is produced during coal mining. Overburden rocks are often stored in dumps or they are used for filling coal mine roads, although this is the problem. In terms of their physical and chemical composition, the overburden rocks are of low strength, so there is a problem of strengthening this type of material, the solution of which can be found in the processing of rocks used for further construction with modified bitumen. The analysis of the effect of the adhesion ability of construction bitumen and crumb rubber modified bitumen produced according to the technology of stage addition of rubber crumb to bitumen (bitumen modified with crumb rubber by stages) is described in the article. Examples of the adhesion of construction bitumen and bitumen modified with crumb rubber by stages to various rocks are given. The characteristics of the adhesion ability of bitumen modified with crumb rubber by stages are substantiated.

Effects of Crumb Rubber Amendments on the Porosity, Water Holding Capacity, and Bulk Density of Three Green Roof Substrates

2010 ◽  
Author(s):  
Andrew G. Ristvey ◽  
Lorelly Solano ◽  
Kimberly Wharton ◽  
Steven M. Cohan ◽  
John D. Lea-Cox
Keyword(s):  
Bulk Density ◽  
Green Roof ◽  
Crumb Rubber ◽  
Water Holding Capacity ◽  
Water Holding
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