EFFECT OF VISCOELASTIC BEHAVIOR OF CELLULOSE OIL PALM FIBER (COPF) MODIFIED 60-70 ASPHALT BINDER FOR DETERIORATION FOR ROADS AND HIGHWAYS

2015 ◽  
Vol 75 (11) ◽  
Author(s):  
Md. Maniruzzaman A. Aziz ◽  
Ahmed Wsoo Hamad ◽  
Abdulmalik Musa Maleka ◽  
Fauzan Mohd Jakarni
Keyword(s):  
Shear Modulus ◽  
Oil Palm ◽  
Softening Point ◽  
Asphalt Binder ◽  
Viscoelastic Behavior ◽  
Complex Shear Modulus ◽  
Palm Fiber ◽  
Modified Asphalt ◽  
Complex Shear ◽  
Modified Asphalt Binder

This paper dealt with the viscoelastic behavior of Cellulose Oil Palm Fiber (COPF) modified 60-70 penetration grade asphalt binder for the deterioration of roads. The main objective of this study was to investigate the effect of various COPF contents on the physical and the rheological properties of penetration grade 60-70 asphalt binder. Laboratory tests performed comprised of viscosity, penetration, softening point, short & long term ageing, as well as complex shear modulus (G*).  The COPF was blended in 0.2, 0.4, 0.6, 0.8, and 1.0% by weight of asphalt binder, including 0% as control. The COPF modified asphalt binder showed an increasing viscosity and softening point with the increase of COPF content, whereas the penetration decreased as the COPF was increased for the binder. The complex shear modulus (G*), rutting factor (G*/sin δ), and fatigue factor (G*sin δ) showed significant improvement for the modified samples compared to the unmodified samples. The results indicated that the COPF modified asphalt binder had high potential to resist permanent (rutting) deformation and fatigue cracking than the unmodified sample. 

EMPIRICAL AND RHEOLOGICAL PROPERTIES EVALUATION OF MODIFIED ASPHALT BINDER CONTAINING NANOPOLYACRYLATE POLYMER MODIFIER

2015 ◽  
Vol 76 (9) ◽  
Author(s):  
E. Shaffie ◽  
J. Ahmad ◽  
A. K. Arshad ◽  
D. Kamarun
Keyword(s):  
Rheological Properties ◽  
Softening Point ◽  
Asphalt Binder ◽  
Pavement Performance ◽  
Polymer Modification ◽  
Modified Asphalt ◽  
Complex Shear ◽  
Modified Asphalt Binder ◽  
Modified Binder ◽  
Temperature Susceptibility

In this paper, the effects of nanopolyacrylate (NP) in binder modification on the empirical and rheological characteristics of the conventional binder were explored. The empirical and rheological binder properties were characterized using penetration, softening point, viscosity and dynamic shear rheometer (DSR) respectively.  These testings have become useful methods in characterizing of the binder performance on the pavement. The results indicated that NP polymer modification improved the physical properties of the conventional binder such as; penetration, softening point and temperature susceptibility. The results of viscosity test show that the NP polymer modified binder is more viscous than unmodified binder where viscosity increases with the increment of polymer content. The DSR results indicate that the NP polymer improves rheological properties of conventional binder, i.e. increasing the complex shear modulus (G∗) values and rutting parameters (G∗/sin δ), as well as decreasing the phase angle (δ) values. Therefore, it can be concluded that NP polymers considerably improves elastic properties and rutting resistance of binder and thus could be used for enhancing the asphalt pavement performance.

RHEOLOGICAL BEHAVIOUR OF COCONUT SHELL POWDER MODIFIED ASPHALT BINDER

2016 ◽  
Vol 78 (7-3) ◽  
Author(s):  
Rosnawati Buhari ◽  
Nur Fareesya Zabidi ◽  
Mohd Ezree Abdullah ◽  
Siti Khatijah Abu Bakar ◽  
Nurul Hidayah Mohd Kamarudin
Keyword(s):  
Rheological Properties ◽  
Softening Point ◽  
Asphalt Binder ◽  
Rheological Behaviour ◽  
Coconut Shell ◽  
Modified Asphalt ◽  
Modified Asphalt Binder ◽  
Modified Binder ◽  
Coconut Shell Powder ◽  
Shell Powder

The objectives of this study were to determine the blending parameters of coconut shell powder (CSP) modified asphalt binder and to evaluate the rheological properties of CSP modified asphalt binder. CSP of 2%, 4%, 6%, 8% and 10% by weight of asphalt have been incorporated into an unaged 80/100 asphalt mix in order to improve its performance. The influence of the additives on the physical and rheological properties was evaluated with penetration test, softening point, storage stability, dynamic shear rheometer test (DSR), and Field Emission Scanning Electron Microscope (FESEM). The aging of asphalt binders was simulated in a laboratory by using Rotational Thin Film Oven (RTFO). The results showed that the addition of CSP into virgin binder was decreasing the penetration value and increasing the softening point temperature compared to the original binder. On the rheological effect, for unaged modified binder, higher CSP resulted higher G*/sin δ especially at lower temperature compared to the unaged control binder. Besides, for the aged modified binder, stiffness was lower than the control aged binder for all temperature.

scholarly journals Artificial Intelligence Prediction of Rutting and Fatigue Parameters in Modified Asphalt Binders

2020 ◽  
Vol 10 (21) ◽  
pp. 7764
Author(s):  
Ikenna D. Uwanuakwa ◽  
Shaban Ismael Albrka Ali ◽  
Mohd Rosli Mohd Hasan ◽  
Pinar Akpinar ◽  
Ashiru Sani ◽  
...  
Keyword(s):  
Shear Modulus ◽  
Predictive Model ◽  
Phase Angle ◽  
Asphalt Binder ◽  
Fatigue Cracking ◽  
Support Vector ◽  
Complex Shear Modulus ◽  
Tropical Regions ◽  
Pavement Distress ◽  
Complex Shear

The complex shear modulus (G*) and phase angle (δ) are fundamental viscoelastic rheological properties used in the estimation of rutting and fatigue pavement distress in asphalt binder. In the tropical regions, rutting and fatigue cracking are major pavement distress affecting the serviceability of road infrastructure. Laboratory testing of the complex shear modulus and phase angle requires expensive and advanced equipment that is not obtainable in major laboratories within the developing countries of the region, giving rise to the need for an accurate predictive model to support quality pavement design. This research aims at developing a predictive model for the estimation of rutting and fatigue susceptive of asphalt binder at intermediate and high pavement temperatures. Asphalt rheological and ageing test was conducted on eight mixes of modified binders used to build the study database containing 1976 and 1668 data points for rutting and fatigue parameters respectively. The database was divided into training and simulation dataset. The Gaussian process regression (GPR) algorithm was used to predict the rutting and fatigue parameters using unaged and aged conditioned inputs. The proposed GPR was compared with the support vector machine (SVM), recurrent neural networks (RNN) and artificial neural network (ANN) models. Results show that the model performed better in the estimation of rutting parameter than the fatigue parameter. Further, unaged input variables show better reliability in the prediction of fatigue parameter.

Preparation and Properties of Ageing Resistant Asphalt Binder with Various Anti-Ageing Additives

2011 ◽  
Vol 71-78 ◽  
pp. 1062-1067 ◽  
Author(s):  
Zhen Gang Feng ◽  
Jian Ying Yu ◽  
Heng Long Zhang ◽  
Dong Liang Kuang
Keyword(s):  
Synergistic Effect ◽  
Softening Point ◽  
Asphalt Binder ◽  
Asphalt Binders ◽  
Modified Asphalt ◽  
Uv Absorber ◽  
Modified Asphalt Binder ◽  
Uv Absorbers ◽  
Compound Modification ◽  
Oxidative Ageing

The modified asphalt binders with various anti-ageing additives, including ultraviolet (UV) absorber, antioxidant and combination of them, were prepared, and the effects of UV absorber contents, antioxidant contents and combination of UV absorber and antioxidant on physical properties and ageing characteristics of the asphalt binder were investigated. Results show that the ductility of asphalt binder increases whereas the softening point and viscosity decrease with addition of anti-ageing additives. UV absorbers and antioxidants exhibit different influences on the ageing properties of asphalt binder. The thermal- and photo-oxidative ageing performance of asphalt binder can be simultaneously improved by the compound modification with UV absorber and antioxidant. The combination of UV326 and antioxidant 1010 shows synergistic effect in preventing the asphalt binder from thermal- and photo-oxidative ageing, which contributes to excellent ageing resistance of modified asphalt binder.

The Analysis of Recovery Asphalt Performance in Recycled Asphalt Mixture

2013 ◽  
Vol 361-363 ◽  
pp. 1598-1603
Author(s):  
Hong Juan Wu ◽  
Xin Yu Zhang
Keyword(s):  
Chemical Composition ◽  
Shear Modulus ◽  
Softening Point ◽  
Asphalt Mixture ◽  
Combustion Method ◽  
Gansu Province ◽  
Complex Shear Modulus ◽  
Recycled Asphalt ◽  
Complex Shear ◽  
Asphalt Performance

A laboratory study was carried to investigate the recycled asphalt performance of recycled asphalt mixture. The recycled asphalt mixture is from the Guaxing road in Gansu Province. By extraction tests and combustion method test on recycled asphalt mixture, the content of recovery asphalt, penetration, softening point and ductility were measured. The chemical composition testing and rheological testing were conducted on the recovery asphalt and new asphalt. Results indicate that the recovery asphalt contain the high proportion of asphaltenes and the low proportion of aromatics and resins. With temperature increasing, the decrease in the complex shear modulus (G*) of the recovery asphalt is much larger than that of the new asphalt,the increase in the phase angle of the recovery asphalt is much larger than that of the new asphalt, too. All these lead to the recovery asphalt harden, poor liquidity and plasticity.

scholarly journals Investigation on Preparation Process and Storage Stability of Modified Asphalt Binder by Grafting Activated Crumb Rubber

Materials ◽  
2019 ◽  
Vol 12 (12) ◽  
pp. 2014 ◽  
Author(s):  
Juan Xie ◽  
Yueming Yang ◽  
Songtao Lv ◽  
Xinghai Peng ◽  
Yongning Zhang
Keyword(s):  
Softening Point ◽  
Molecular Design ◽  
Asphalt Binder ◽  
Crumb Rubber ◽  
Preparation Process ◽  
Range Analysis ◽  
Rubber Content ◽  
Segregation Index ◽  
Modified Asphalt ◽  
Modified Asphalt Binder

According to the theory of molecular design, crumb rubber was grafting activated with acrylamide and then used as asphalt binder modifier. An orthogonal three-factor, three-level test was designed to optimize the preparation process of modified asphalt. Softening point, viscosity, rutting factor, ductility, stiffness modulus and creep speed index were selected as evaluation indicators to study the effects of rubber content, shear time and shear temperature by variance analysis and range analysis. The results show that the rubber content had a significant impact on the performance of modified asphalt with grafting-activated crumb rubber, while the shear temperature and shear time had little effect. The grafting activated crumb rubber content of 20%, shear temperature of 170–190 °C, and shear time of 90 min was determined as the reasonable preparation process. Modified asphalt with common crumb rubber (CRMA) and modified asphalt with grafting activated crumb rubber (A-G-R) were prepared, respectively, using the reasonable process to analyze the influence of grafting activation of crumb rubber. The results indicate that A-G-R had smaller softening point difference, lower segregation index and more stable and uniform dispersed phase.

The Effects of Aging on Asphalt Binders Containing Visbreaking Residues

2017 ◽  
Vol 737 ◽  
pp. 541-546
Author(s):  
Pavel Coufalik ◽  
Ondrej Dasek ◽  
Iva Krcmova ◽  
Petr Hyzl
Keyword(s):  
Low Temperature ◽  
Shear Modulus ◽  
Softening Point ◽  
Laboratory Tests ◽  
Asphalt Binders ◽  
Complex Shear Modulus ◽  
Needle Penetration ◽  
Complex Shear ◽  
Creep Stiffness ◽  
Effects Of Aging

The quality and properties of asphalt binders are one of the most important factors that affect lifetime of asphalt roads. In refineries, visbreaking residues (VFCRs) are sometimes added to asphalt binders in variable ratios. VFCR addition can affect the overall properties of the manufactured binder, in particular resistance against aging. Using selected laboratory tests, this paper analyzes the effects of adding VFCRs to paving bitumens with a gradation of 160/220 on its properties (needle penetration, softening point, complex shear modulus and phase angle and creep stiffness and m-values). Also the effect of simulated aging of binders containing VFCRs on their properties has been tested. It was found that by increasing the VFCR content and the extent of aging, the binder stiffness increases. At higher VFCR ratios, the binder is more affected by aging at higher temperatures. Increased amount of VFCR also negatively affects low-temperature properties of the binder, which is related to its higher stiffness.

scholarly journals Studying the Properties of SBS/Rice Husk Ash-Modified Asphalt Binder and Mixture

2020 ◽  
Vol 2020 ◽  
pp. 1-11
Author(s):  
Zhen Lu ◽  
Aimin Sha ◽  
Wentong Wang ◽  
Junfeng Gao
Keyword(s):  
Low Temperature ◽  
Rice Husk ◽  
Softening Point ◽  
Rice Husk Ash ◽  
Asphalt Binder ◽  
Asphalt Mixture ◽  
Modified Asphalt ◽  
Temperature Performance ◽  
Modified Asphalt Binder ◽  
Rotational Viscosity

Sustainable materials in the field of road pavement have become a research direction in recent years. In this study, the rice husk ash with small dosage of styrene-butadiene-styrene (SBS) was added as a bioadditive into the base asphalt to modify its properties. Different contents (0, 2, 5, 10, and 15%) of rice husk ash (RHA) and 1% of SBS were selected to prepare the modified asphalt. Penetration, softening point, ductility, rotational viscosity test, and temperature sweep test were conducted to investigate the properties of SBS/RHA-modified asphalt binder. Rutting test, moisture susceptibility, and low-temperature cracking were utilized to evaluate the performances of SBS/RHA-modified asphalt mixture. The results showed that the penetration decreased and the softening point and rotational viscosity enhanced while the ductility slightly decreased with the incorporation of rice husk ash. The SBS/RHA-modified asphalt mixture had better high-temperature performance than that of the virgin asphalt mixture but slightly lower moisture stability and low temperature performance. The tensile strength ratio of the virgin and modified asphalt mixture met the requirement of specification. The tensile strain of mixture SR15 was lower than the requirement for the asphalt mixtures on the basis of the specification. For the SBS/RHA-modified asphalt binder based on the comprehensive properties, the content of rice husk ash should not be higher than 15%.

Modeling the DSR complex shear modulus of asphalt binder using 3D discrete element approach

2014 ◽  
Vol 54 ◽  
pp. 236-246 ◽  
Author(s):  
G. Dondi ◽  
V. Vignali ◽  
M. Pettinari ◽  
F. Mazzotta ◽  
A. Simone ◽  
...  
Keyword(s):  
Shear Modulus ◽  
Asphalt Binder ◽  
Discrete Element ◽  
Complex Shear Modulus ◽  
Complex Shear ◽  
Element Approach
Sign in / Sign up

Export Citation Format

Share Document