Warm recycling of flexible pavements: Effectiveness of Warm Mix Asphalt additives on modified bitumen and mixture performance

2017 ◽  
Vol 156 ◽  
pp. 911-922 ◽  
Author(s):  
Arianna Stimilli ◽  
Amedeo Virgili ◽  
Francesco Canestrari
Keyword(s):  
Flexible Pavements ◽  
Warm Mix Asphalt ◽  
Modified Bitumen

Finite element viscoelastic simulations of rutting behavior of hot mix and warm mix asphalt overlay on flexible pavements

2021 ◽  
Vol 14 (6) ◽  
pp. 708-719
Author(s):  
Hossein Alimohammadi ◽  
Junxing Zheng ◽  
Ashley Buss ◽  
Vernon R. Schaefer ◽  
Christopher Williams ◽  
...  
Keyword(s):  
Finite Element ◽  
Flexible Pavements ◽  
Warm Mix Asphalt ◽  
Asphalt Overlay ◽  
Rutting Behavior

scholarly journals Investigation of Mixing and Compaction Temperatures of Modified Hot Asphalt and Warm Mix Asphalt

2020 ◽  
Author(s):  
Ali Almusawi ◽  
Burak Sengoz ◽  
Ali Topal
Keyword(s):  
Shear Flow ◽  
Warm Mix Asphalt ◽  
Steady Shear ◽  
Alternative Methods ◽  
Chemical Additives ◽  
Modified Bitumen ◽  
Zero Shear Viscosity ◽  
Flow Method ◽  
Steady Shear Flow ◽  
Angle Method

The determination of mixing and compaction temperatures through the Equiviscous method has been defined as the standard method and it is designed for the base bitumen (unmodified bitumen) based on the viscosity measurements. The implementation of the Equiviscous method for the modified bitumen resulted in high mixing and compaction temperatures which may not be required during the construction of the asphalt mixtures. This study aims to investigate several alternative methods proposed in the literature named as high shear rate method, zero shear viscosity method, steady shear flow method, and phase angle method. Besides, the obtained mixing and compaction temperatures results are compared with the standard (equiviscous) method. For this purpose, 50/70 penetration grade bitumen modified with 5 % elastomeric type – Styrene Butadiene Styrene (SBS), and 1.5 % Reactive Elastomeric Terpolymer type – Elvaloy (RET) has been used. The study also aims to measure the applicability of the proposed alternative methods for the warm mix asphalt involving organic and chemical additives. The results have shown that for the polymer modified bitumen, the application of all proposed methods in the literature resulted in lower mixing and compaction temperatures compared to the Equiviscous method. While for the warm mix asphalt, the implementation of the steady shear flow method resulted in lesser temperatures compared to the Equiviscous method.

Long-Term Field Performance of Flexible Pavements Using Warm Mix Asphalt Technologies

2020 ◽  
Author(s):  
SHIHUI SHEN ◽  
WEIGUANG ZHANG ◽  
SHENGHUA WU ◽  
LOUAY MOHAMMAD ◽  
BALASINGAM MUHUNTHAN
Keyword(s):  
Flexible Pavements ◽  
Field Performance ◽  
Warm Mix Asphalt ◽  
Term Field

scholarly journals Warm Mix Asphalt Additive in Natural Rubber Modified Bitumen

2019 ◽  
Vol 266 ◽  
pp. 04005 ◽  
Author(s):  
Mazlina Mustafa Kamal ◽  
Kamarul Arifin Hadithon ◽  
Rohani Abu Bakar
Keyword(s):  
Natural Rubber ◽  
Energy Savings ◽  
Asphalt Mixture ◽  
Mechanical Analysis ◽  
Warm Mix Asphalt ◽  
Modified Bitumen ◽  
Rotational Viscometer ◽  
Compaction Temperature ◽  
Complex Shear ◽  
Reduction Of Emissions

The growing concern over the reduction of emissions and energy savings has led to the development of new paving technologies that are environmentally friendly. As a result, a warm mix asphalt technologies have been introduced to reduce the mixing and compaction temperature for asphalt mixture. The influence of additive with variation loading on the performance of Natural Rubber Modified Bitumen was acquired. In this work, Brookfield rotational viscometer test and Dynamic Shear Rheometer (DSR) mechanical analysis method and typical bitumen tests were employed. Results indicated that viscosity and the penetration of the Natural Rubber Modified Bitumen decreased, while the softening point increased with addition of additive. This in return would possible to reduce mixing and compaction temperature of the Natural Rubber Modified Mixture. Findings of the study also showed that the additive resulted in increase in complex shear modulus value and the rutting parameter modulus.

scholarly journals Rutting and Moisture Damage Evaluation of Warm Mix Asphalt Incorporating POFA Modified Bitumen

2019 ◽  
Vol 9 (1) ◽  
pp. 90-98 ◽  
Keyword(s):  
Tensile Strength ◽  
Road Construction ◽  
Moisture Damage ◽  
Warm Mix Asphalt ◽  
Ratio Test ◽  
Strength Ratio ◽  
Modified Bitumen ◽  
Palm Oil Fuel Ash ◽  
Dynamic Creep ◽  
Oil Fuel

The unwanted disposal Palm Oil Fuel Ash (POFA) can be minimised through its application in road construction. Available literatures have shown that POFA improves the performance of hot mix asphalt (HMA), however, its application in warm mix asphalt (WMA) remains unexplored. This study was carried out to investigate the performance of WMA with POFA modified bitumen. In this study, Five percent POFA and 0.75% Evotherm is blended with 60/70 PEN grade bitumen to produce warm POFA modified bitumen (B3). The B3 binder is subjected Fourier Transform Infrared spectroscopy (FTIR), Atomic Force Microscopy (AFM), and Contact angle measurements to understand the effect of this modification at microstructural level. Also, the binder is used in preparing dense graded asphalt concrete (AC14) at 140/130 ℃ mixing/compaction temperatures rspectively. Mixture performance tests such as Marshall flow and stability, dynamic creep, Asphalt Pavement Analyser (APA), tensile strength ratio, and boiling water tests were used to examine the resistance of B3 binder to rutting and moisture damage. Results from dynamic creep and APA test shows that the WMA mixtures possess 30% improved rutting resistance than the conventional HMA. On the contrary, the WMA sample parade lower resistance to moisture damage by 10% as revealed by the tensile strength ratio test. All the tested samples satisfied the specification limits for AC14 mixture, thus alleviating any concern regarding the moisture damage vulnerability of WMA mixtures.

Performance evaluation of warm mix asphalt using natural rubber modified bitumen and cashew nut shell liquid

2020 ◽  
Vol 13 (4) ◽  
pp. 442-453 ◽  
Author(s):  
C. S. Bindu ◽  
Margret Sherin Joseph ◽  
P. S. Sibinesh ◽  
Shithin George ◽  
Shyama Sivan
Keyword(s):  
Performance Evaluation ◽  
Natural Rubber ◽  
Warm Mix Asphalt ◽  
Modified Bitumen ◽  
Cashew Nut Shell Liquid ◽  
Cashew Nut ◽  
Cashew Nut Shell

Rheological behaviour of n-alkane modified bitumen in aspect of Warm Mix Asphalt technology

2015 ◽  
Vol 93 ◽  
pp. 703-710 ◽  
Author(s):  
Jan B. Król ◽  
Karol J. Kowalski ◽  
Piotr Radziszewski ◽  
Michał Sarnowski
Keyword(s):  
Rheological Behaviour ◽  
Warm Mix Asphalt ◽  
Modified Bitumen

scholarly journals Viscoelastic Properties of Polymer Modified Bitumen in Warm Mix Asphalt Technology in Terms of Ageing

2017 ◽  
Vol 172 ◽  
pp. 401-408 ◽  
Author(s):  
Marek Iwański ◽  
Małgorzata Cholewińska ◽  
Grzegorz Mazurek
Keyword(s):  
Viscoelastic Properties ◽  
Warm Mix Asphalt ◽  
Modified Bitumen ◽  
Polymer Modified Bitumen
Sign in / Sign up

Export Citation Format

Share Document