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.

Study of Rheological Properties of Cariphalte Modified Asphalt

2014 ◽  
Vol 638-640 ◽  
pp. 1185-1189
Author(s):  
Tan Hua
Keyword(s):  
Comparative Analysis ◽  
Rheological Properties ◽  
Fatigue Damage ◽  
Systematic Study ◽  
Low Temperatures ◽  
Permanent Deformation ◽  
Asphalt Binder ◽  
Fatigue Properties ◽  
Dynamic Shear ◽  
Modified Asphalt

To explore the effects of different factors on the rheological properties of cariphalte modified asphalt, based superpave asphalt binder relevant norms, through the use of dynamic shear rheometer Shell 70# asphalt under different temperature, frequency and strain conditions and rheological properties of cariphalte modified asphalt carrying on a systematic study, and comparative analysis of the two anti-fatigue properties of asphalt in the middle and low temperature.The results show that: compared with 70# asphalt, cariphalte modified asphalt has better rutting resistance over a wide temperature range; at lower frequencies and high intensity pavement, cariphalte modified asphalt to better resistance to permanent deformation; better fatigue resistance at low temperatures, and more fatigue damage is not easy to achieve.

Rheological Properties of High Grade Asphalt and its Mixture

2014 ◽  
Vol 599 ◽  
pp. 244-247 ◽  
Author(s):  
Qun Shan Ye ◽  
Chang Jian Ye ◽  
Zhi Lin Sun
Keyword(s):  
Rheological Properties ◽  
Dynamic Modulus ◽  
Permanent Deformation ◽  
Asphalt Binder ◽  
Asphalt Mixture ◽  
Asphalt Binders ◽  
Test Results ◽  
Complex Shear Modulus ◽  
Complex Shear ◽  
Dynamic Modulus Test

Viscosity test, dynamic shear test, dynamic modulus test and creep test were conducted to investigate the rheological properties of high modulus asphalt and its mixture. Test results indicated that the viscosity of hard grade asphalt could be increased when compared with the ordinary asphalt, especially at high temperatures. The complex shear modulus and dynamic modulus of hard-grade asphalt binder and its mixture were increased, which implied that the stiffness of them was enhanced. Furthermore, the elastically portions for viscoelastic property of asphalt binders were increased, which resulted in the reduction of phase angle for hard grade asphalt binders and mixtures. The rutting parameter for hard-grade asphalt mixture was increased remarkably, which revealed that the resistance to permanent deformation could be significantly improved for hard grade asphalt mixture.

scholarly journals Warm mix asphalt mixture using modified asbuton semi extraction modify and synthetic zeolite additive

2019 ◽  
Vol 276 ◽  
pp. 03003
Author(s):  
Leo Sentosa ◽  
S Subagio Bambang ◽  
Harmein Rahman ◽  
R. Anwar Yamin
Keyword(s):  
Permanent Deformation ◽  
Asphalt Mixture ◽  
Warm Mix Asphalt ◽  
Synthetic Zeolite ◽  
Asphalt Mixtures ◽  
Marshall Test ◽  
Asphalt Modification ◽  
Characteristic Values ◽  
Higher Temperature ◽  
Pavement Construction

Modifying asphalt aims to improve the performance of the asphalt pavement construction as indicated by increased resistance to permanent deformation and fatigue crack. Asbuton Semi Extraction is one of the materials that can be used for asphalt modification. The addition of Asbuton semi-extraction increases the value of Bitumen Stability Modulus, resistance to permanent deformation and can also increase the asphalt PG value, but require a higher temperature for mixing and compaction. The high temperatures for the manufacture of asphalt mixtures require considerable energy at a more expensive cost and will result in large emissions. The asphalt mixing technology currently being developed is Asphalt Warm Mix, that is asphalt mixture with mixing temperature below 1500°C. One method is to use zeolite additives. The asphalt mixture with the addition of synthetic zeolite can be prepared by mixing and compaction temperatures lower than 30°C of the hot mixture. From the Marshall test, it is known that zeolite addition of 0.3% of the total weight of the mixture gives the characteristic values of the asphalt mixture which still meets the requirements of the specification used. Increased zeolite levels minimize the value of mixed resistance to the immersion indicated by the IRS Marshall value.

scholarly journals Characteristics Buton Natural Asphalt-Rubber (BNA-R) on the Performance Improvement of Warm Mix Asphalt Using Natural Zeolite

2018 ◽  
Vol 34 ◽  
pp. 01032 ◽  
Author(s):  
Nurul Wahjuningsih ◽  
Sigit Pranowo Hadiwardoyo ◽  
R Jachrizal Sumabrata
Keyword(s):  
Natural Zeolite ◽  
Complex Modulus ◽  
Heavy Traffic ◽  
Permanent Deformation ◽  
Asphalt Binder ◽  
Asphalt Mixture ◽  
Warm Mix Asphalt ◽  
Traffic Load ◽  
Test Machine ◽  
Road Maintenance

The decrease in the ability of service of pavement can be caused by the durability factor in the pavement layer in receiving heavy traffic load and the temperature of the pavement. Permanent deformation is one of the criteria of failure of asphalt mixture. Performance assessment of the asphalt mixture can be observed from the rheological properties of asphalt binder. The use of BNA-R in this study is intended to modify the characteristics of bitumen penetration grade 60 / 70 used in warm mix asphalt. Warm mix asphalt with lower temperatures of mixing and compaction than conventional asphalt mixtures was chosen because it is more environmentally friendly. To reduce the temperature in this warm asphalt technology is achieved by using natural zeolite. Both of these materials are local materials that are widely available in Indonesia. The rheology of asphalt 60/70 modified with BNA-R indicates that the addition of BNA-R in the base asphalt increase the complex modulus value and decrease the phase angle value. These values were related to the performance of mixture in the permanent deformation criteria. Reducing the temperature of mixing and compaction should be balanced with modifying the asphalt binder used. Rutting due to permanent deformation can resulted in inconvenience to the passengers and can lead to high costs of road maintenance. To determine the permanent deformation of asphalt mix with material combinations was performed through the wheel tracking test machine with 3,780 cycles for 3 hours. The results shows that after test track over 7 thousand passes have seen permanent deformation characteristics of asphalt concrete mixture with a variation of the characteristics of bitumen.

scholarly journals MECHANICAL PERFORMANCE OF ASPHALT MIXTURE CONTAINING CUP LUMP RUBBER

2019 ◽  
Vol 81 (6) ◽  
Author(s):  
Norfazira Mohd Azahar ◽  
Norhidayah Abdul Hassan ◽  
Ramadhansyah Putra Jaya ◽  
Hasanan Md. Nor ◽  
Mohd Khairul Idham Mohd Satar ◽  
...  
Keyword(s):  
Mechanical Performance ◽  
Resilient Modulus ◽  
Permanent Deformation ◽  
Asphalt Binder ◽  
Asphalt Mixture ◽  
Modified Asphalt ◽  
Dynamic Creep ◽  
Aging Conditions ◽  
Public Work Department ◽  
Indirect Tensile

The use of cup lump rubber as an additive in asphalt binder has recently become the main interest of the paving industry. The innovation helps to increase the natural rubber consumption and stabilize the rubber price. This study evaluates the mechanical performance of cup lump rubber modified asphalt (CMA) mixture in terms of resilient modulus, dynamic creep and indirect tensile strength under aging conditions. The CMA mixture was prepared using dense-graded Marshall-designed mix and the observed behavior was compared with that of conventional mixture. From the results, both mixtures passed the volumetric properties as accordance to Malaysian Public Work Department (PWD) specification. The addition of cup lump rubber provides better resistance against permanent deformation through the enhanced properties of resilient modulus and dynamic creep. Furthermore, the resilient modulus of CMA mixture performed better under aging conditions.  

Determining Optimum Carbon Nanotubes Content for Asphalt Mixture in Road Pavements

2021 ◽  
Vol 1023 ◽  
pp. 121-126
Author(s):  
Van Bach Le ◽  
Van Phuc Le
Keyword(s):  
Carbon Nanotubes ◽  
Asphalt Pavement ◽  
Asphalt Binder ◽  
Asphalt Mixture ◽  
Construction Cost ◽  
Asphalt Mixtures ◽  
Static Modulus ◽  
Pavement Construction ◽  
Modified Binder ◽  
Marshall Stability

Although small amount of binder in asphalt concrete mixture may commonly range from 3.5 to 5.5% of total mixture as per many international specifications, it has a significant impact on the total cost of pavement construction. Therefore, this paper investigated the effects of five carbon nanotubes contents of 0.05%, 0.1%, 0.15%, 0.2%, 0.25% by asphalt weight as an additive material for binder on performance characteristics of asphalt mixtures. Performance properties of CNTs modified asphalt mixtures were investigated through the Marshall stability (MS) test, indirect tensile (IDT) test, static modulus (SM) test, wheel tracking (WT) test. The results indicated that asphalt mixtures with CNT modified binder can improve both the rutting performance, IDT strength and marshall stability of tested asphalt mixtures significantly at higher percentages of carbon nanotubes. However, the issue that should be considered is the construction cost of asphalt pavement. Based on the asphalt pavement structural analysis and construction cost, it can be concluded that an optimum CNT content of 0.1% by asphalt weight may be used as additive for asphalt binder in asphalt mixtures.

Effects of Aging on the Physical and Rheological Properties of Asphalt Binder Incorporating Rediset®

2014 ◽  
Vol 70 (7) ◽  
Author(s):  
Mohamad Yusri Aman ◽  
Zulkurnain Shahadan ◽  
Munzilah Md. Ruhani ◽  
Rosnawati Buhari
Keyword(s):  
Statistical Analysis ◽  
Rheological Properties ◽  
Asphalt Binder ◽  
Dynamic Shear ◽  
Short Term ◽  
Rotational Viscometer ◽  
Aging Index ◽  
Modified Binders ◽  
Before And After ◽  
Effects Of Aging

This paper focuses on physical and rheological properties of virgin asphalt binder blended with different percentage of Rediset® content. The rheological properties of the Rediset® modified binders were characterized before and after being subjected to short-term aging using rotational viscometer (RV) and dynamic shear rheometer (DSR) according to SuperpaveTM test protocols. The results indicated that the penetration and softening point were consistently decreased and increased, respectively for unaged and short-term aged samples. The penetration index (PI) and viscosity aging index (VAI) were increased as the Rediset® modified binders aged and showed a high significance correlation. The addition of Rediset® in asphalt binder exhibited change in binder rheology after subjected to short-term aged which influenced the rutting parameter. A statistical analysis showed that Rediset® used as warm asphalt additive had significantly increased the G*/Sin δ parameter which indicated greater resistance to rutting.

Superpave Models: Predicting Performance during Design and Construction

1996 ◽  
Vol 1545 (1) ◽  
pp. 105-112
Author(s):  
Gerald A. Huber ◽  
Xishun Zhang ◽  
Robin Fontaine
Keyword(s):  
Prediction Models ◽  
Permanent Deformation ◽  
Asphalt Binder ◽  
Asphalt Mixture ◽  
Asphalt Mixtures ◽  
Engineering Properties ◽  
Design System ◽  
Widespread Application ◽  
Premature Failure ◽  
The Impact

The Strategic Highway Research Program (SHRP) spent $50 million researching asphalt binders and asphalt mixtures and provided three main products: an asphalt binder specification, an asphalt mixture specification, and Superpave, an asphalt mixture design system that encompasses both the binder and mixture specification. SHRP researchers have provided tools that promise more robust asphalt mixtures with reduced risk of premature failure. Implementation of the specifications and mix design system will require overcoming several obstacles. Superpave must be demonstrated to be practical and easy to use. The impact of Superpave aggregate requirements on aggregate availability must be determined. The Superpave gyratory compaction procedure has been uniquely defined and then calibrated to traffic volume. The reasonableness of this approach must be tested in widespread application. Perhaps the largest implementation hurdle exists in the performance models. Expensive test equipment is necessary to do the performance-based tests. The performance predictions must be established as reasonable to justify the cost. A highway reconstruction project containing three Superpave Level 1 mix designs is documented including quality control done with the Superpave gyratory compactor. Superpave Level 2 performance-based tests were carried out to predict permanent deformation of the design and the mixture as constructed. The performance-based engineering properties obtained from the tests are evaluated, and the reasonableness of the performance prediction models is discussed.

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