Laboratory evaluation of dry process crumb rubber modified mixtures containing Warm Mix Asphalt Additives

Öztürk, Hande İşık; Kamran, Farshad

doi:10.1016/j.conbuildmat.2019.116940

Cited by 30 publications

(5 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Rubberized asphalt concrete generally improve durability, reduce aging and oxidation, and enhance resistance to fatigue cracking, rutting, and reflective cracking. Furthermore, CRM asphalt binders lower costs of maintenance, noise generation, and improve skid resistance [4][5][6][7][8][9][10]. Despite these benefits, there are concerns in the application of CR in asphalt.…”

Section: Introductionmentioning

confidence: 99%

Performance Evaluation of Crumb Rubber Asphalt Modified with Silicone-Based Warm Mix Additives

Lushinga

Cao

Zhang

et al. 2020

Advances in Civil Engineering

View full text Add to dashboard Cite

This research was conducted to elucidate better understanding of the performance of crumb rubber asphalt modified with silicone-based warm mix additives. Two different silicone-based warm mix asphalt (WMA) additives (herein Tego XP and Addibit) were used to prepare crumb rubber modified (CRM) warm mix asphalt binders. The viscosity of these CRM binders was measured at different temperatures and shearing rates. Furthermore, softening point and penetration tests, Multiple Stress Creep Recovery (MSCR), Time Sweep (TS), Atomic Force Microscopy (AFM), Frequency sweep (FS), and Fourier Transform Infrared (FTIR) tests were also conducted on prepared samples. Based on these robust and rigorous laboratory experiments, it was established that viscosity of CRM binders was reduced by addition of Tego XP and Addibit WMA additives. However, WMA additives had different influence on rheological properties of the binder. CRM binder with Tego XP improved resistance to rutting of the binders but would degrade the fatigue performance. On the contrary, viscoelastic continuum damage (VECD) model results and those of phase angle approach revealed that the binder with Addibit improved resistance to fatigue cracking of the binders but had no adverse effects on high temperature rutting performance. FTIR test results established a presence of polydimethylsiloxane (PDMS) in CRM binders with Tego XP and Addibit. PDMS is a well-known hydrophobic organic and inorganic polymer that is water repellent; therefore, binders containing these silicone-based warm mix additives could be beneficial in resisting moisture damage in asphalt binders and mixtures. Morphology of CRM binders with and without WMA revealed good distribution of the rubber particles in asphalt binder matrix. Further addition of WMA increased surface roughness of the binder, which can be correlated to changes in microstructure properties of the binder. Therefore, the study concluded that addition of Tego XP and Addibit reduces viscosity and improves mechanical properties of the asphalt binder.

show abstract

Section: Introductionmentioning

confidence: 99%

Performance Evaluation of Crumb Rubber Asphalt Modified with Silicone-Based Warm Mix Additives

Lushinga

Cao

Zhang

et al. 2020

Advances in Civil Engineering

View full text Add to dashboard Cite

show abstract

“…It is known that WMA additives can lower the compaction temperature without deteriorating performance and increase the compactability of asphalt mixes [31]. Additionally, by maintaining the same temperature as with HMA mixtures, targeted compaction can be achieved with less energy using WMA additives [32].…”

Section: Introductionmentioning

confidence: 99%

An Evaluation of the Cracking Resistance of Steel- and Glass-Fiber-Reinforced Asphalt Mixtures Produced at Different Temperatures

Yucel

2023

Sustainability

View full text Add to dashboard Cite

This study focuses on the effects of the production temperatures, warm mix asphalt (WMA) additive, and fiber content on the cracking resistance of steel- and glass-fiber-reinforced asphalt mixtures. By using three different approaches, which included different mixing and compaction temperatures, along with the incorporation of a WMA additive, the samples were produced utilizing the Marshall mix design method. The low-temperature cracking resistance and bottom-up fatigue cracking resistance of the asphalt mixture samples were assessed through indirect tensile (IDT) tests performed at two different test temperatures: −10 °C and 20 °C, respectively. According to the fracture work density values, glass fibers significantly improve the low-temperature cracking performance of asphalt mixtures. Furthermore, it was found that the low-temperature cracking resistance of the hot mix asphalt (HMA) mixtures containing fibers was similar to that of the mixtures prepared using the WMA additive at 15 °C lower mixing and compaction temperatures than the HMA mixtures. To conclude, the WMA additive improved the compactability of the steel- and glass-fiber-reinforced asphalt mixtures without compromising the low temperature cracking performance, despite the low mixing and compaction temperatures.

show abstract

“…In addition, this implies significant environmental benefits. Along with the direct reduction of end of life tires, the feasibility of the rubberized asphalt for production processes with low energy consumption, as well as the decrease of emissions (CO and methane) for conventional hot asphalt production processes, have been reported lately [6][7][8]. Furthermore, it is shown that an optimal incorporation of crumb rubber (CR) particles as elastic aggregate can manage to reduce the noise from the tire/pavement interaction up to 2 dB(A) [9].…”

Section: Introductionmentioning

confidence: 99%

Recyclability of Asphalt Mixtures with Crumb Rubber Incorporated by Dry Process: A Laboratory Investigation

et al. 2020

View full text Add to dashboard Cite

Semi-Dense Asphalt (SDA) mixtures are nowadays recommended for the surface layer of low noise roads in urban areas due to their optimal functional characteristics. Moreover, the use of polymer-modified bitumen (PmB) in its design results in high mechanical performance. However, this type of highly modified bitumen implies significant economic and environmental disadvantages. The polymer modification increases the production cost, involves higher mixing temperatures, and makes the recycling process of the asphalt mixtures challenging. As a potential alternative to PmB in SDA mixtures, this experimental work analyses the dry process for the incorporation of crumb rubber (CR) from waste tires. Particularly, the main objective was to study the aging effect and the recyclability of asphalt mixtures prepared in the laboratory with two different types of CR. The volumetric properties and mechanical performance of the mixtures artificially aged and rejuvenated were evaluated. The results obtained show that mixtures with CR have adequate performance, being less susceptible to aging than a conventional polymer-modified mixture. Furthermore, the rheological response of asphalt binder samples recovered from the mixtures at different aging states was analyzed. It was observed that the effect of the rejuvenator depended on the CR type, but this fact did not negatively influence the performance of the recycled mixtures.

show abstract

Laboratory evaluation of dry process crumb rubber modified mixtures containing Warm Mix Asphalt Additives

Cited by 30 publications

References 14 publications

Performance Evaluation of Crumb Rubber Asphalt Modified with Silicone-Based Warm Mix Additives

Performance Evaluation of Crumb Rubber Asphalt Modified with Silicone-Based Warm Mix Additives

An Evaluation of the Cracking Resistance of Steel- and Glass-Fiber-Reinforced Asphalt Mixtures Produced at Different Temperatures

Recyclability of Asphalt Mixtures with Crumb Rubber Incorporated by Dry Process: A Laboratory Investigation

Contact Info

Product

Resources

About