Research on Rheological Properties of Warm Mix Asphalt Binders

2013 ◽  
Vol 689 ◽  
pp. 363-367
Author(s):  
You Quan Zou
Keyword(s):  
Rheological Properties ◽  
Energy Savings ◽  
Mechanical Analysis ◽  
Warm Mix Asphalt ◽  
Environmental Benefits ◽  
Asphalt Binders ◽  
Frequency Sweep ◽  
Conventional Tests ◽  
Rheological Test ◽  
Dynamic Shearing

Abstract. Warm mix asphalt (WMA) has been gaining increasing popularity in recent years due to energy savings and environmental benefits. Warm mix asphalt reduces the production temperatures (mixing and compaction) while maintains the advantages of hot mix asphalt (HMA). It is becoming an attractive paving material. Therefore, it is important to understand the rheological behavior of asphalt binders changes with temperature and proportion of the additives. In this study, rheological properties of one commonly used binder PG 70-28 were evaluated, with and without additives (Sasobit® and Aspha-Min®) as the warm asphalt additives, by means of conventional tests as well as dynamic mechanical analysis using Dynamic Shearing Rheometer (DSR).The rheological test included viscosity, temperature sweep and frequency sweep.

Rheological and chemical characteristics of warm mix asphalt binders at intermediate and low performance temperatures

2013 ◽  
Vol 40 (9) ◽  
pp. 861-868 ◽  
Author(s):  
Feipeng Xiao ◽  
V.S. Punith ◽  
Serji N. Amirkhanian ◽  
Bradley J. Putman
Keyword(s):  
Rheological Properties ◽  
Warm Mix Asphalt ◽  
Environmental Benefits ◽  
Asphalt Binders ◽  
Testing Procedures ◽  
Binder Type ◽  
Creep Stiffness ◽  
Short And Long Term ◽  
Low Performance

Warm asphalt has been gaining increasing popularity in recent years around the world due to many reasons including the energy reductions and environmental benefits. In the present study, the objective was to conduct a laboratory investigation of rheological properties of eight binders with four non-foaming warm mix asphalt (WMA) additives at intermediate and low performance temperatures in terms of Superpave low temperature test criteria. The conventional testing procedures such as dynamic shear rheometer (DSR), bending beam rheometer (BBR) test as well as specific Fourier transform infrared spectroscopy (FTIR) were performed to determine the influences of non-foaming additives on asphalt binders after a long-term aging procedure. The test results indicated that the binder type and source play key roles in determining the G*sin δ values of WMA binders with the non-foaming WMA additive. All eight binders containing Sasobit generally have higher creep stiffness values compared to the binders with other WMA additives. The FTIR tests illustrated that the absorbance of the C-O stretch and C-H bend regions of the WMA binders after a short and long-term aging procedure can be considered similar. Moreover, the WMA binders generally exhibit better performance properties than control binders at intermediate and low temperatures after a long-term aging procedure. Furthermore, FTIR analysis results indicate that the binder type and source play important roles in determining the rheological properties of WMA binders.

The Effect of Network Formation on the Rheological Properties of SBR Modified Asphalt Binders

1997 ◽  
Vol 70 (2) ◽  
pp. 256-263 ◽  
Author(s):  
Yong-Joon Lee ◽  
Lawrence M. France ◽  
Martin C. Hawley
Keyword(s):  
Rheological Properties ◽  
Laser Scanning ◽  
Network Formation ◽  
Complex Modulus ◽  
Mechanical Analysis ◽  
Global Network ◽  
Asphalt Binders ◽  
Styrene Butadiene Rubber ◽  
Butadiene Rubber ◽  
Local Networks

Abstract Styrene-butadiene rubber (SBR) was used to modify asphalt binders. The rheological and thermo-mechanical properties of the binders were investigated using rotational viscometry, dynamic shear rheometry, and thermal mechanical analysis. The optimum SBR content and mixing procedure were determined based on the rheological properties of the asphalt/SBR blends. The addition of 3–5% (w/w) SBR resulted in enhanced high temperature performance of the binders. The SBR progresses from a dispersed polymer to local networks to a global network with increasing SBR content. This phenomenon is exhibited in rheological properties such as complex modulus and melt viscosity. It is also verified visually by using a Laser Scanning Confocal Microscope. Because of this network formation, the binders showed a large increase in the complex modulus which indicates resistance to rutting.

Influence of Chemical Constituents of Asphalt Binders on Their Rheological Properties

2019 ◽  
Vol 2673 (6) ◽  
pp. 458-466 ◽  
Author(s):  
K. Lakshmi Roja ◽  
Eyad Masad
Keyword(s):  
Rheological Properties ◽  
Chemical Constituents ◽  
High Density ◽  
Asphalt Binders ◽  
Composition Analysis ◽  
Test Results ◽  
Aging Index ◽  
Linear Viscoelastic ◽  
Frequency Sweep Test ◽  
Rheological Test

The goal of this study is to investigate the chemical constituents and rheological properties of three different binders used in the State of Qatar. Binders were designated as WL (source 1, low density), WH (source 1, high density) and AH (source 2, high density). Binder composition analysis was carried out using the saturates, aromatics, resins and asphaltene determinator (SAR-AD) technique. The percentages of saturates, aromatics, resins and asphaltenes were measured, and from those, the total pericondensed aromatics (TPA), absorbance aging index (AAI), and colloidal instability index (CII) were obtained and their relationship to rheological test results was investigated. In the rheological investigation, the linear viscoelastic properties of these binders were evaluated using a frequency sweep test. The rutting characteristics were evaluated using the percentage of recovery and non-recoverable creep compliance values from the multiple stress creep and recovery (MSCR) test, while the fatigue resistance was assessed using the linear amplitude sweep (LAS) test. The WL binder was found to have the highest stiffness, which is associated with the highest TPA content. From the MSCR test, the AH binder had the lowest rut resistance. This binder also had the lowest CII value, which represents the balanced chemical composition of this material. Out of the three binders, WH had the highest AAI value which is related to the least fatigue life as measured in the LAS test.

scholarly journals RHEOLOGICAL PROPERTIES OF BITUMEN MODIFIED WITH A COMBINATION OF FT PARAFFIN WAX (SASOBIT®) AND OTHER ADDITIVES

2016 ◽  
Vol 22 (2) ◽  
pp. 135-145 ◽  
Author(s):  
Hassan FAZAELI ◽  
Amir A. AMINI ◽  
Fereidoon MOGHADAS NEJAD ◽  
Hamid BEHBAHANI
Keyword(s):  
Rheological Properties ◽  
Polyphosphoric Acid ◽  
Crumb Rubber ◽  
Mechanical Analysis ◽  
Modified Bitumen ◽  
Modified Binders ◽  
Conventional Tests ◽  
Ft Ir ◽  
Styrene Butadiene ◽  
Butadiene Styrene

Fischer–Tropsch paraffin Sasobit® is a popular Warm Mix Asphalt (WMA) modifier applied to improve physi­cal and rheological properties of bitumen. Although there are a number of studies investigating the effects of sasobit on bitumen properties, little has been carried out on evaluation of bitumen modified by sasobit along with other additives. In this study, sasobit modified bitumen is used as the base condition and four common modifiers namely anti-stripping agent, Crumb Rubber (CR), Styrene–Butadiene–Styrene (SBS) and Polyphosphoric Acid (PPA) are added separately to the FT – Wax modified bitumen to evaluate the compatibility of these additives with sasobit. Morphological, rheological and physical properties of modified binders are studied using Fourier Transform Infrared Spectroscopy (FT-IR), Scan­ning Electron Microscopy (SEM), Dynamic Mechanical Analysis (DMA), Bending Beam Rheometer (BBR) alongside with conventional tests. Results show that although anti-stripping agent reduce bitumen viscosity and mixing/compac­tion temperatures of asphalt mixtures, it has significantly increased the stiffness of sasobit modified bitumen at low temperatures. Among all, sasobit and crumb rubber combination exhibited the best performance, especially at low and intermediate temperatures.

Rheological Properties of Asphalt Binder Modified with Chemical Warm Asphalt Additive

2013 ◽  
Vol 671-674 ◽  
pp. 1692-1699 ◽  
Author(s):  
Mohd Ezree Abdullah ◽  
Kemas Ahmad Zamhari ◽  
Mustafa Kamal Shamshudin ◽  
Hainin Mohd Rosli ◽  
Mohd Khairul Idham
Keyword(s):  
Energy Consumption ◽  
Rheological Properties ◽  
Permanent Deformation ◽  
Asphalt Binder ◽  
Asphalt Mixture ◽  
Mechanical Analysis ◽  
Warm Mix Asphalt ◽  
Dynamic Shear ◽  
Rotational Viscosity ◽  
Pavement Construction

Going towards sustainable pavement construction, asphalt industries constantly give their effort to implement Warm Mix Asphalt (WMA) by adding the chemical warm asphalt additive (CWAA). This can lower its energy consumption and pollution by reducing the mixing and compaction temperatures of the asphalt mixture without affecting its properties. Several studies have been conducted evaluating the properties of the WMA, however, little documented research on the rheology of the binders containing CWAA is available especially when dealing the sources of binders. In this paper, the tests for rheology characteristics of the Malaysian asphalt binder containing CWAA were conducted with rotational viscosity and for dynamic mechanical analysis with dynamic shear rheometer (DSR). The results of the investigation indicated that the CWAA had a significant reduction of required heat for mixing and compaction effort and also shows lower permanent deformation when compared to the control binder.

Analysis of the Low-Temperature Rheological Properties of Rubberized Warm Mix Asphalt Binders

2012 ◽  
Vol 40 (7) ◽  
pp. 20120147 ◽  
Author(s):  
Hainian Wang ◽  
Zhengxia Dang ◽  
Zhanping You ◽  
Peiwen Hao ◽  
Xiaoming Huang
Keyword(s):  
Low Temperature ◽  
Rheological Properties ◽  
Warm Mix Asphalt ◽  
Asphalt Binders

Effects of Sasobit on Rheological Properties of Asphalt Binders

2012 ◽  
Vol 509 ◽  
pp. 136-141
Author(s):  
Zhi Fei Liu ◽  
Jia Ping Liu ◽  
Jin Xiang Hong ◽  
Chong Huang
Keyword(s):  
Melting Point ◽  
Rheological Properties ◽  
Warm Mix Asphalt ◽  
Asphalt Binders ◽  
Test Results ◽  
Dynamic Shear ◽  
Dynamic Shear Rheometer ◽  
Rutting Resistance ◽  
Modified Binders ◽  
Rheometer Test

Research in the laboratory was carried out to determine if addition of warm mix asphalt additive (Sasobit) has potential to reduce the temperature comparison with control mix. To fulfill this purpose five types of asphalt binders have been produced with a Sasobit additive in concentration range from 0 to 10% by weight of the asphalt. Viscosity test and dynamic shear rheometer test are conducted for the investigation of effects of Sasobit on rheological properties characteristics of binders. Viscosity tests on binders indicated that the Sasobit binders had significantly lower viscosities compared to control binders at the temperature above 100°C, indicating that Sasobit can reduce the mixing and compaction temperatures above the melting point of Sasobit. Sasobit modified binders are more sensitive cracking and had more excellent rutting resistance properties at service temperatures compared with original bitumen. Based on the test results, the suggest content of Sasobit addition is 3% by weight.

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.

The Effect of Short-Term Aging on Rheological Properties of Asphalts

2011 ◽  
Vol 255-260 ◽  
pp. 3321-3325
Author(s):  
Li Xing Ma ◽  
Jun Feng Huang ◽  
Zhi Da Li
Keyword(s):  
Rheological Properties ◽  
Softening Point ◽  
Dynamic Testing ◽  
Complex Modulus ◽  
Viscoelastic Behavior ◽  
Asphalt Binders ◽  
Rheological Characteristics ◽  
Short Term ◽  
Conventional Tests ◽  
Temperature Susceptibility

The effect of short-term aging on rheological properties of asphalts was studied. In this paper, asphalt was aged by rolling thin film oven, which was carried out for 300 minutes and were analyzed at an interval of 75 minutes. The paper gives a description of the most commonly used conventional tests, such as Penetration and Softening Point, and a more detailed description of the viscoelastic behavior and dynamic testing of asphalts by way of Brookfield viscometer and Dynamic Shear Rheometer (DSR). It is found that there are a decrease in penetration and an increase in softening point with aging. The viscosity of aged asphalts was observed to increase with time. The DSR results show that short-term aging significantly increases the complex modulus at low temperature, but complex modulus at high temperature was just lightly affected. The four tests results were also incorporated to evaluate the temperature susceptibility and the rheological characteristics of asphalt binders.

Preparation and Properties of Nanoclay/TPS/Asphalt Ternary Binders

2009 ◽  
Vol 620-622 ◽  
pp. 497-500 ◽  
Author(s):  
Shao Peng Wu ◽  
Jin Gang Wang ◽  
Yuan Zhang
Keyword(s):  
Rheological Properties ◽  
High Speed ◽  
Complex Modulus ◽  
Preliminary Investigation ◽  
Asphalt Binder ◽  
Asphalt Binders ◽  
Frequency Sweep ◽  
Modified Asphalt ◽  
Aging Resistance ◽  
Before And After

After a preliminary investigation on the binary asphalt/clay binder, the ternary binder was prepared by adding the nanoclay and TAFPACK-SUPER (TPS) to the original asphalt. The previous research shows that exfoliated/intercalated layers homogeneously are dispersed in the asphalt matrix and the nanocomposite has formed. Rotation Thin Film Oven Test (RTFOT) and Pressure Age Vessel Test (PAV) results indicate that the modified asphalt with 3% organic nano-montmorillonite (OMMT) present better performance of aging resistance. The purpose of this research is to attain ternary asphalt binder with better rheological performance and aging resistance. The ternary modified asphalt binder containing 4% OMMT and 12% TPS by weight were prepared at the laboratory scale using high speed shearing mixer. The rheological properties of OMMT/TPS modified asphalt binders were evaluated before and after aging in present paper. Temperature sweep tests and frequency sweep tests were conducted to characterize the rheological properties of modified asphalt using Dynamic Shear Rheometer (DSR). According to the frequency sweep tests, complex modulus master curves were plotted to analysis the rheological properties. The results indicate that nanoclay/TPS/asphalt ternary binders have more excellent performance of rheological and aging resistance at both high and low temperatures, compared with the virginal bitumen and TPS modified asphalt.

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