The engineering, economic, and environmental performance of terminal blend rubberized asphalt binders with wax-based warm mix additives

Wen, Yong; Wang, Yuhong; Zhao, Kecheng; Chong, Dan; Huang, Weidong; Hao, Gengren; Mo, Shicong

doi:10.1016/j.jclepro.2018.03.011

Cited by 82 publications

(12 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Furthermore, effects of WMA additives on bitumen characteristics were extensively studied in literature [12,[22][23][24][25][26][27][28][29]. These studies provide a good basis to understand the effects of WMA additives on bitumen characteristics.…”

Section: Introductionmentioning

confidence: 99%

Thermo-rheological analysis of WMA-additive modified binders

et al. 2020

View full text Add to dashboard Cite

Thermo-rheological characteristics of unmodified and modified bitumen have significant impacts on the mechanical response of asphalt. This study investigates the impacts of an organic and a chemical Warm Mix Asphalt additive on bitumen thermo-rheological and mechanical characteristics. Modified binders with different concentrations of each additive were studied and analysed comparatively to a 40/60 penetration grade bitumen. Frequency sweep tests were performed at different ageing levels to characterise the Linear Viscoelastic properties. The multiple stress creep and recovery, linear amplitude sweep (LAS) and low temperature creep stiffness tests, together with the Glover-Rowe (G-R) fatigue parameter (determined from fitting of the 2S2P1D model to the complex shear modulus and phase angle master curves) were used to analyse the performance of the binders at critical operating temperatures. The results demonstrated the necessity to analyse the behavior of the studied binders beyond the limits of linear viscoelasticity to better characterise these types of bitumen. The results also indicated that both additives retarded bitumen ageing with the organic additive increasing bitumen elastic response while the chemical additive increased its viscous response. The results also showed an excellent correlation between the G-R parameter and LAS results which suggests the ability to use this parameter in characterising fatigue performance of the studied binders. This also suggests that bitumen fatigue life may be improving over time due to the increased elastic behahviour during ageing so long as a certain critical level of ageing is not reached.

show abstract

Section: Introductionmentioning

confidence: 99%

Thermo-rheological analysis of WMA-additive modified binders

et al. 2020

View full text Add to dashboard Cite

show abstract

“…The first stage is mixing rubber powder and aggregate and then adding asphalt to produce a rubber-modified asphalt mixture [ 5 , 6 ]. The second stage is mixing asphalt + rubber powder + rubber oil, stirring in a tank at a temperature of 180 to 200 °C for about 40 to 60 min, then mixing with aggregate to produce a rubber-modified asphalt mixture [ 7 ]. The third stage involves factory-based stabilized rubberized asphalt, asphalt + rubber powder, stirred at the specified temperature and time and then added to the product tank when the product standard is reached [ 2 , 8 ].…”

Section: Introductionmentioning

confidence: 99%

“…Most of the manufacturing process of asphalt rubber is on-site production, and a sufficient working surface must be added at the construction site to complete the production of asphalt rubber [ 19 , 20 ]. If the project volume is not large, there is the risk of producing a large amount of waste, which is also an obstacle to the promotion of rubberized asphalt—underdeveloped construction and workability [ 3 , 7 , 15 ]. Because rubber-modified asphalt’s viscosity is too large, the workability of construction is a deviation, and the amount of rubber powder is not high [ 16 , 21 ].…”

Section: Introductionmentioning

confidence: 99%

Laboratory Investigation of Rubberized Asphalt Using High-Content Rubber Powder

Wang

et al. 2020

Materials

View full text Add to dashboard Cite

Rubberized asphalt (RA) has been successfully applied in road engineering due to its excellent performance; however, the most widely used rubber content is about 20%.To improve the content of waste rubber and ensure its performance, seven rubberized asphalts with different powder content were prepared by high-speed shearing. Firstly, penetration, softening point, and ductility tests were carried out to investigate the conventional physical features of high-content rubberized asphalt (HCRA). Then, the dynamic shear rheometer test (DSR) was conducted to estimate the high-temperature rheological properties. The bending beam rheometer test (BBR) was carried out to evaluate the low-temperature rheological performance. Finally, combined with the macroscopic performance test, the modification mechanism was revealed by the Fourier transform infrared reflection (FTIR) test, and scanning electron microscope (SEM) analysis was used to observe the microscopic appearance before and after aging. The results show that rubberized asphalt has excellent properties in high- and low-temperature conditions, and fatigue resistance is also outstanding compared with neat asphalt. As the crumb rubber content increases, it is evident that the 40% RA performance is the best. The low-temperature properties of HCRA are better than the traditional 20% rubberized asphalt. This study provides a full test foundation for the efficient utilization of HCRA in road engineering.

show abstract

“…However, there are some disadvantages to using Sasobit as a warming agent. First, it will weaken the low-temperature crack resistance of PAM, which will cause the premature failure of the mixture in cold regions [14,15]. Moreover, the application of Sasobit greatly increases the cost of the mixture.…”

Section: Introductionmentioning

confidence: 99%

Mechanical Performance of Warm-Mixed Porous Asphalt Mixture with Steel Slag and Crumb-Rubber–SBS Modified Bitumen for Seasonal Frozen Regions

et al. 2019

View full text Add to dashboard Cite

In this paper, the performance of a warm-mixed porous asphalt mixture (PAM) with steel slag as aggregate and crumb-rubber–SBS (styrene-butadiene-styrene) modified bitumen as a binder was studied. Two kinds of warming additives were used, namely ethylene bis stearic acid amide (EBS) and stearic acid amide (SA). The mixtures were investigated for their permeability, Marshall stability, low-temperature crack resistance, and underwent a rutting test, water sensitivity evaluation and Cantabro particle loss test. Then, the viscoelastic and dynamic characteristics of the mixtures were also analyzed. The results showed that the addition of the warming additives allowed the decrease of the manufacturing temperature by 10 °C. Thus, the addition of warming additives significantly improves the low-temperature crack resistance and slightly reduces the water sensitivity, weakly increases the permeability, and has little effect on the resilient modulus. Since the addition of SA significantly improves the low-temperature crack resistance and rutting resistance of the PAM, SA is therefore recommended for pavement engineering in seasonal frozen regions.

show abstract

The engineering, economic, and environmental performance of terminal blend rubberized asphalt binders with wax-based warm mix additives

Cited by 82 publications

References 21 publications

Thermo-rheological analysis of WMA-additive modified binders

Thermo-rheological analysis of WMA-additive modified binders

Laboratory Investigation of Rubberized Asphalt Using High-Content Rubber Powder

Mechanical Performance of Warm-Mixed Porous Asphalt Mixture with Steel Slag and Crumb-Rubber–SBS Modified Bitumen for Seasonal Frozen Regions

Contact Info

Product

Resources

About