Multi-Scale Rheo-Mechanical Study of SMA Mixtures Containing Fine Crumb Rubber in a New Dry-Hybrid Technology
Open Access
- 3 June 2020
- journal article
- research article
- Published by MDPI AG in Applied Sciences
- Vol. 10 (11), 3887
- https://doi.org/10.3390/app10113887
Abstract
Aiming to study the rheo-mechanical effects of fine crumb rubber into gap graded stone mastic asphalt (SMA) mixtures, a multi-scale experimental approach was adopted. Therefore, in the perspective of the reuse of end of life tires’ in asphalt layers, the adopted new dry-hybrid technology effects have been investigated from the mastic, mortar and mixture points of view. The new rubberized asphalt production technology allows the use of rubber powder as filler, the rubber amount optimization being validated through multi-scale performance tests. Mastics and mortars’ complex modulus measured with dynamic shear and torsional tests were related to the mixture stiffness modulus recorded in direct tension-compression mode. The rheological properties of mastic are strictly influenced by the rubber presence, and consequently the asphalt mixtures stiffness and thermo-sensitivity are connected to the mastic and mortar rheo-mechanical behavior. Results are consistent through the adopted approach and reveal that with the new dry-hybrid technology, overcoming the wet and dry limits, it seems to be possible obtaining more durable and eco-friendly bituminous pavement layers.This publication has 17 references indexed in Scilit:
- Evaluation of the degradation of fine asphalt-aggregate mixtures containing high reclaimed asphalt pavement contentsRoad Materials and Pavement Design, 2017
- A complete laboratory assessment of crumb rubber porous asphaltConstruction and Building Materials, 2017
- Incorporation of Rubber Powder as Filler in a New Dry-Hybrid Technology: Rheological and 3D DEM Mastic Performances EvaluationMaterials, 2016
- Time dependent viscoelastic rheological response of pure, modified and synthetic bituminous bindersMechanics of Time-Dependent Materials, 2016
- Effect of volumetric factors on the mechanical behavior of asphalt fine aggregate matrix and the relationship to asphalt mixture propertiesConstruction and Building Materials, 2013
- Recycled Tyre Rubber Modified Bitumens for road asphalt mixtures: A literature reviewConstruction and Building Materials, 2013
- The effect of crumb rubber modifier on the resistance of asphalt mixes to plastic deformationMaterials & Design (1980-2015), 2012
- Fatigue behavior of SMA and HMA mixturesConstruction and Building Materials, 2010
- Modeling viscosity behavior of crumb rubber modified bindersConstruction and Building Materials, 2009
- The status of recycling of waste rubberMaterials & Design (1980-2015), 2001