scholarly journals Rheological Properties and Application of Molasses Modified Bitumen in Hot Mix Asphalt (HMA)

2020 ◽  
Vol 10 (6) ◽  
pp. 1931
Author(s):  
Werku Hareru ◽  
Tewodros Ghebrab
Keyword(s):  
Moisture Content ◽  
Rheological Properties ◽  
Test Performance ◽  
Hot Mix Asphalt ◽  
Partial Replacement ◽  
Creep Recovery ◽  
Modified Bitumen ◽  
Performance Grade ◽  
Frequency Sweep Test ◽  
The Fourier Transform

The use of molasses as a replacement for bitumen could benefit the pavement industry by improving the performance of the pavement or by lowering its cost. An experimental investigation was carried out to investigate the effect of molasses with different moisture contents on the property of hot-mix asphalt (HMA). Bitumen binders (BB) containing 5%, 10%, 15%, and 20% molasses were investigated as molasses modified binders (MMB). Molasses with 24.9% and 5.02% by weight of water were used to investigate the effect of moisture on the MMBs. In addition to the conventional binder tests, additional tests such as the Fourier transform infrared (FTIR) test, amplitude and frequency sweep test, performance grade (PG) test, and multiple stress creep recovery (MSCR) test were performed. The results indicated that most of the properties of the MMBs improved with the reduction in the moisture content of molasses but worsened with the percentage replacement of molasses. The IR spectra show that the carbonyl index decreased with an increasing amount of molasses. The control grade PG58 was improved to PG64 and PG70 when the base binder was modified with molasses and aged with rolling thin film oven (RTFO) consecutively. At a temperature of 58 °C, non-recoverable creep compliance of 3.2 kPa (Jnr3.2kPa) was decreased for each MMB, which leads to improved rutting potential. At a temperature of 64 °C, the Jnr value was decreased only for the MMB containing 5% molasses, and then gradually increased for the remaining MMBs. Generally, the study revealed that low moisture content molasses could be used as a partial replacement for bitumen to enhance the rheological properties of the bitumen.

scholarly journals Rheological Properties and Application of Molasses Modified Bitumen in Hot Mix Asphalt (HMA)

2020 ◽  
Author(s):  
Werku Hareru ◽  
Tewodros Ghebrab
Keyword(s):  
Rheological Properties ◽  
Test Performance ◽  
Structural Integrity ◽  
Hot Mix Asphalt ◽  
Asphalt Binder ◽  
High Volume ◽  
Treatment Method ◽  
Partial Replacement ◽  
Creep Recovery ◽  
Modified Bitumen

The high volume of water in molasses has made this study serious. The reason is that using molasses as a partial replacement without treatment significantly affects the rheological properties of the neat bitumen and increases the likelihood of moisture susceptibility of the hot-mix asphalt (HMA) pavement structure and create fractures of aggregate particles. Therefore, to use molasses as a partial replacement without affecting the structural integrity of the pavement, this study proposed a treatment method before blending it with petroleum-based bitumen. A series of experiment was conducted to accomplish the objective of this paper, including convectional tests, Fourier transform infrared (FTIR) test, amplitude and frequency sweep test, performance grade (PG) determination test, and multiple stress creep recovery (MSCR) tests. The IR spectra show that carbonyl index decreased with increasing molasses percent. There was PG improvement from the control grade to PG64 and PG70 when the base binder modified with 5-20% molasses and aged with rollingl thin film oven (RTFO) respectively. At the temperature 58oC nonrecoverable creep compliance at 3.2 kPa (Jnr3.2kPa) was decreased for each percent replacement. This led to improving the rutting potential. As well, at a temperature of 64oC the Jnr value was decreased only for 5% replacement, and then the Jnr value was gradually increased for the remaining percent replacement. Overall, this study revealed that treated molasses can be used as a partial replacement to enhance the rheological properties of the base bitumen and thus it can potentially be used to produce a sustainable bio-asphalt binder.

scholarly journals Permanent Deformation of Hot Mix Asphalt (HMA) using Dynamic Modulus Simple Performance Test

2019 ◽  
Vol 8 (4) ◽  
pp. 7001-7006
Keyword(s):  
Dynamic Modulus ◽  
Performance Test ◽  
Hot Mix Asphalt ◽  
Permanent Deformation ◽  
Asphalt Mixtures ◽  
Aging Condition ◽  
Modified Bitumen ◽  
Road Users ◽  
Performance Grade ◽  
Different Content

Premature pavement breakdown can be caused by permanent deformation that can contribute to lower riding comfort for road users and an increase in maintenance costs. Dynamic modulus Simple Performance Test (SPT) test are considered to be significant in describing the permanent deformation of hot mix asphalt. In this study, Marshall method of mix design were used in order to prepare four asphalt mixtures comprising different content of Nanopolyacrylate (NP) polymer (0%NP, 2%NP, 4%NP and 6%NP). This study was aimed to evaluate the influence of the NP modified mixture on the permanent deformation. The Performance Grade PG64-22 was obtained by mixing the conventional bitumen (PG64-22) with nanopolyacrylate. Dynamic Shear Rheometer (DSR) at different aging condition were conducted in order to characterise the bitumen performance. While, the Simple Performance Test (SPT) was used to characterize rutting and fatigue on Marshall HMA mixes. Results from the study presented that, NP modified bitumen has a significant impact on the dynamic and rutting resistance. The addition of nanopolyacrylate significantly enhances the rheological properties of asphalt bitumen. The results revealed that 4%NP has high potential to improve rutting and fatigue resistance

Rheological and Molecular Characterizations of Tire Rubber Modified Asphalt Emulsion

2020 ◽  
Vol 2674 (3) ◽  
pp. 12-26 ◽  
Author(s):  
Md Tanvir Ahmed Sarkar ◽  
Md Nafiur Rahman ◽  
Mostafa A. Elseifi ◽  
Corey Mayeux ◽  
Samuel B. Cooper
Keyword(s):  
Rheological Properties ◽  
Asphalt Binder ◽  
Gel Permeation Chromatography ◽  
The Other ◽  
Creep Recovery ◽  
Test Results ◽  
Asphalt Emulsion ◽  
Tire Rubber ◽  
Modified Asphalt ◽  
Performance Grade

The aim of this study was to characterize the chemical, molecular, and rheological properties of different asphalt emulsions including a newly introduced tire-rubber modified asphalt emulsion (CRS-2TR). Three emulsions (CRS-2TR, CRS-2P, and CRS-2) and one asphalt rubber binder (AC20-5TR) were evaluated in this study. The superpave performance grade (PG), surface performance grade (SPG), and the multiple stress creep recovery (MSCR) test were conducted to evaluate the rheological properties of the binder residues. Evaluation of the differences in the functional groups, molecular weight distribution, and chemical composition of the asphalt binder residues was conducted using Fourier transform infrared spectroscopy (FTIR), high-pressure gel permeation chromatography (HP-GPC), and saturates, aromatics, resins and asphaltenes (SARA) fractionation, respectively. The chemical and molecular characterization test results indicated that the tire-rubber modified emulsion had lower carbonyl indices and colloidal instability indices as compared to the other conventional emulsions, indicating a higher resistance to aging. On the other hand, the rheological test results showed that the performance of CRS-2TR was comparable to CRS-2P and was expected to perform better than CRS-2. In addition, the moisture susceptibility of the binder residues from the bitumen bond strength (BBS) test showed that CRS-2TR had a greater pull-off tensile strength in both dry and wet conditions as compared to CRS-2 and had statistically equal performance results as compared to CRS-2P.

scholarly journals A Review on Improving Asphalt Pavement Service Life Using Gilsonite-Modified Bitumen

2021 ◽  
Vol 13 (12) ◽  
pp. 6634
Author(s):  
Hayder Al Hawesah ◽  
Monower Sadique ◽  
Clare Harris ◽  
Hassan Al Nageim ◽  
Karl Stopp ◽  
...  
Keyword(s):  
Rheological Properties ◽  
Hot Mix Asphalt ◽  
Asphalt Binder ◽  
Asphalt Mixture ◽  
Asphalt Mixtures ◽  
Asphalt Binders ◽  
Modified Bitumen ◽  
Dry Process ◽  
Modified Asphalt ◽  
Wet Process

Hot mix asphalt has various benefits such as good workability and durability. It is one of the most general materials used as asphalt mixtures in road pavements. Asphalt mixtures and binders can be improved by modifying them with various additives. Gilsonite is a natural asphalt hydrocarbon which may be used as an additive to hot mix asphalt. It is used as an asphalt binder modifier (wet process) and an asphalt mixture modifier (dry process) to improve the properties of the mix. It provides the option of improved rheological properties, stability, strength rutting resistance and moisture sensitivity. This paper examines the current research relating to the use of gilsonite to improve the asphalt properties (binder and mixture). The rheological properties of the modified asphalt binders and mechanical properties of the modified asphalt mixtures will be reviewed. The influence of adding gilsonite individually or combined with other additives will be discussed. Furthermore, assessment of the environmental and economic perspectives of the studied asphalt along with some suggestions to improve the asphalt binders and mixtures will be explored.

scholarly journals Dataset of mechanical, marshall and rheological properties of crumb rubber – Bio-oil modified hot mix asphalt for sustainable pavement works

Data in Brief ◽  
2018 ◽  
Vol 21 ◽  
pp. 63-70 ◽  
Author(s):  
Abayomi Emmanuel Modupe ◽  
Olumoyewa Dotun Atoyebi ◽  
Opeyemi Emmanuel Oluwatuyi ◽  
Oluwasegun James Aladegboye ◽  
Ayobami Adebola Busari ◽  
...  
Keyword(s):  
Rheological Properties ◽  
Hot Mix Asphalt ◽  
Crumb Rubber ◽  
Bio Oil

scholarly journals WORKABILITY AND RHEOLOGICAL PROPERTIES OF EVA-MODIFIED BITUMEN COMPARED WITH PG 76 BINDER

2018 ◽  
Vol 80 (4) ◽  
Author(s):  
Ebenezer Akin Oluwasola ◽  
Mohd Rosli Hainin ◽  
Mohd Khairul Idham ◽  
Modupe Abayomi
Keyword(s):  
Rheological Properties ◽  
Vinyl Acetate ◽  
Softening Point ◽  
Ethylene Vinyl Acetate ◽  
Climatic Conditions ◽  
Dynamic Shear ◽  
Modified Bitumen ◽  
Dynamic Shear Rheometer ◽  
Modified Binder

The failures of the flexible pavements are not only caused by harsh climatic conditions prevailing in most of the tropical countries but also due to increase in traffic. The ethylene vinyl acetate (EVA) modification of the bitumen can strengthen the properties of binders and also improve the quality of bitumen used for pavements construction. This paper reports the changes in physical and rheological properties of unaged 80-100 grade bitumen modified with different percentages of EVA and compared with the properties of PG 76 binder. The penetration, softening point and viscosity properties were studied. The rheological properties were measured using dynamic shear rheometer and the test was performed at temperatures ranging from 46 to 76 ⁰C at intervals of 6 ⁰C. It was noted that, after modification, the properties of binders had improved. The results show that 5% EVA content by weight in modified binder is adequate in terms of physical and rheological properties studied. In addition, the properties of 5% EVA modified 80-100 grade bitumen are similar to PG 76 binder.

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