scholarly journals Performance Evaluation of Asphalt Binder Modified by Natural Rock Asphalt

2021 ◽  
Vol 31 (5) ◽  
pp. 291-295
Author(s):  
Khalid Awadh Mohammed ◽  
Ali I. Mansi ◽  
Yasir R. Hussein
Keyword(s):  
Performance Evaluation ◽  
Temperature Sensitivity ◽  
Softening Point ◽  
Asphalt Binder ◽  
Flash Point ◽  
Distributed Resources ◽  
Modified Asphalt ◽  
Natural Rock ◽  
Conventional Tests ◽  
Lower Temperature

Rock asphalt is one of the widely distributed resources in nature. Therefore, this study employs natural rock asphalt as an additive. The focus of this study is to look at the potential of using natural rock asphalt as an asphalt binder modifier. The study looks at five different percentages of modified asphalt (NRA) concentration from Anbar factory asphalt for oxidized bitumen: 0%, 5%, 10%, 20%, and 30%. The results show that using modified natural rock asphalt increased the mechanical qualities of basic asphalt, such as penetration and softening point, flash point, and viscosity. In addition, the current results show that the asphaltic materials that can be used in paving according to the measuring of conventional tests such as ductility, penetration, and others. Furthermore, the findings indicate that modified asphalt has lower temperature sensitivity.

Road Performance of Asphalt Binder Modified with Natural Rock Asphalt

2013 ◽  
Vol 634-638 ◽  
pp. 2729-2732 ◽  
Author(s):  
Feng Ma ◽  
Chao Zhang
Keyword(s):  
Temperature Sensitivity ◽  
Softening Point ◽  
Asphalt Binder ◽  
Component Analysis ◽  
Asphalt Binders ◽  
Test Results ◽  
Modified Asphalt ◽  
Natural Rock ◽  
Road Performance ◽  
Natural Asphalt

The performance of base asphalt and modified asphalt by natural rock asphalt are studied. This paper presents the results from a series of assessments of properties of asphalt binders, which incorporate natural rock asphalts produced from China. Asphalt binders’ properties were measured by penetration, Ring and Ball softening point, ductility and four component analysis tests. Test results showed that the addition of natural asphalt reduces the penetration and ductility value, and increases softening point. The temperature sensitivity of modified asphalt is reduced.

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.

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.

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. 

Experimental Study on Polyphosphoric Acid (PPA) Modified Asphalt Binders

2010 ◽  
Vol 152-153 ◽  
pp. 288-294 ◽  
Author(s):  
Wei Dong Cao ◽  
Shu Tang Liu ◽  
Hong Lu Mao
Keyword(s):  
Low Temperature ◽  
Softening Point ◽  
Asphalt Binder ◽  
Asphalt Binders ◽  
Modified Asphalt ◽  
Temperature Performance ◽  
Point Test ◽  
Low Temperature Performance ◽  
Four Levels ◽  
Temperature Susceptibility

Polyphosphric acid (PPA) modified asphalt binders were produced in the laboratory using one base asphalt and four levels of PPA contents (0.6%, 1.0%, 1.5% and 2.0% by weight of base asphalt). Penetration test, softening point test, rotation viscosity test, creep test with bending beam rheometer (BBR) and four components test were carried out to study the performance of PPA modified asphalt binders and possible modification mechanism. The results indicate that the high-temperature performance of PPA modified asphalt binders are obviously improved and temperature susceptibility are decreased, but the low-temperature performance slightly decline compared with base asphalt. The PPA content has a very significant effect on softening point whereas it has no significant influence on low-temperature performance according to variance analysis (ANOVA). Finally, four components test reveals that the primary modification mechanism of PPA is the change of chemical composition of asphalt binder.

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.

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.

scholarly journals Assessment of temperature susceptibility for rubber granulate modified road asphalt binders considering impact of aging

2018 ◽  
Vol 222 ◽  
pp. 01016
Author(s):  
Mieczysław Słowik ◽  
Damian Wiśniewski ◽  
Marcin Bilski ◽  
Marta Mielczarek
Keyword(s):  
Phase Angle ◽  
Softening Point ◽  
Positive Impact ◽  
Asphalt Binder ◽  
Positive Influence ◽  
Asphalt Binders ◽  
Dynamic Shear Modulus ◽  
Road Asphalt ◽  
Modified Asphalt ◽  
Temperature Susceptibility

The article presents the results of research on temperature sensitivity of ground rubber modified asphalt binders. The tests were performed for 50/70 penetration grade road bitumen and two kinds of granulated rubber: activated and inactivated. Such parameters of asphalt binders as: penetration, softening point, dynamic shear modulus and phase angle have been determined and on this basis the temperature susceptibility of the reference bitumen and asphalt binders modified by activated and inactivated rubber have been determined. All the tests were carried out for three observation levels: without aging and after aging simulations carried out by RTFOT and PAV methods. The tests revealed that addition of granulated rubber has a positive influence on asphalt binder properties, even after the aging process, causing an increase in the softening point and a decrease in penetration and the phase angle of asphalt binder. Asphalt binders obtained in result of modification by addition of rubber show smaller temperature susceptibility than the reference bitumen (without addition of rubber). Also, a positive impact of aging on the temperature susceptibility was observed for the investigated binders.

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%.

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