scholarly journals Effects of polyvinyl chloride (PVC), styrene butadiene styrene (SBS) and aggregate gradation on permanent deformation of asphalt concrete pavement

2020 ◽  
Vol 671 ◽  
pp. 012093 ◽  
Author(s):  
Estabraq N. Ezzat ◽  
Alaa H. Abed
Keyword(s):  
Polyvinyl Chloride ◽  
Asphalt Concrete ◽  
Permanent Deformation ◽  
Concrete Pavement ◽  
Aggregate Gradation ◽  
Styrene Butadiene Styrene ◽  
Asphalt Concrete Pavement ◽  
Styrene Butadiene ◽  
Butadiene Styrene

scholarly journals Evaluation of Properties and Micro-Characteristics of Waste Polyurethane/Styrene-Butadiene-Styrene Composite Modified Asphalt

Polymers ◽  
2021 ◽  
Vol 13 (14) ◽  
pp. 2249
Author(s):  
Bei Chen ◽  
Fuqiang Dong ◽  
Xin Yu ◽  
Changjiang Zheng
Keyword(s):  
Low Temperature ◽  
Performance Test ◽  
Permanent Deformation ◽  
Modified Asphalt ◽  
Basic Performance ◽  
Styrene Butadiene Styrene ◽  
Styrene Butadiene ◽  
Sbs Modified Asphalt ◽  
And Storage ◽  
Butadiene Styrene

In order to solve the problems caused by asphalt diseases and prolong the life cycle of asphalt pavement, many studies on the properties of modified asphalt have been conducted, especially polyurethane (PU) modified asphalt. This study is to replace part of the styrene-butadiene-styrene (SBS) modifier with waste polyurethane (WP), for preparing WP/SBS composite modified asphalt, as well as exploring its properties and microstructure. On this basis, this paper studied the basic performance of WP/SBS composite modified asphalt with a conventional performance test, to analyze the high- and low-temperature rheological properties, permanent deformation resistance and storage stability of WP/SBS composite modified asphalt by dynamic shear rheometer (DSR) and bending beam rheometer (BBR) tests. The microstructure of WP/SBS composite modified asphalt was also observed by fluorescence microscope (FM) and Fourier transform infrared spectroscopy (FTIR), as well as the reaction between WP and asphalt. According to the results of this study, WP can replace SBS as a modifier to prepare WP/SBS composite modified asphalt with good low-temperature resistance, whose high-temperature performance will be lower than that of SBS modified asphalt. After comprehensive consideration, 4% SBS content and 15% WPU content (4 S/15 W) are determined as the suitable types of WPU/SBS composite modified asphalt.

scholarly journals Influence of Hydrated Lime on the Properties and Permanent Deformation of the Asphalt Concrete Layers in Pavement

2015 ◽  
Vol 4 (1) ◽  
pp. 1-19 ◽  
Author(s):  
Ahmed F. Al-Tameemi ◽  
Yu Wang ◽  
Amjad Albayati
Keyword(s):  
Asphalt Concrete ◽  
Raw Materials ◽  
Permanent Deformation ◽  
Fatigue Cracking ◽  
Hydrated Lime ◽  
Concrete Pavement ◽  
Partial Replacement ◽  
Repeated Loading ◽  
Concrete Mixtures ◽  
Asphalt Concrete Pavement

Abstract Flexible or asphalt concrete pavement is the paving system most widely adopted all over the world. It has been recognized that there are many different types of the factors affecting the performance and durability of asphalt concrete pavement, including the service conditions, such as: the variation of temperature from mild to extremes and the repeated excessive axle loading as well as the inadequate quality of the raw materials. All of these when combined together are going to accelerate the occurrence of distresses in flexible pavement such as permanent deformation and fatigue cracking. As the result, there has an urgent need to enhance the ability of asphalt concrete mixture to resist distresses happened in pavement. Use of additives is one of the techniques adopted to improve pavement properties. It has been found that hydrated lime might be one of the effective additives because it is widely available and relatively cheap compared to other modifiers like polymers. This paper presents an experimental study of the hydrated-lime modified asphalt concrete mixtures. Five different percentages of the hydrated lime additive were investigated, namely (1, 1.5, 2, 2.5 and 3 percent). The hydrated lime additive was used as partial replacement of limestone filler by total weight of the aggregate. The designed Hot Mix Asphalt (HMA) concretes are for the application of three pavement courses, i.e. Surface, Leveling and Base. These mixtures are designed and tested following Marshall procedure and uniaxial repeated loading to evaluate permanent deformation at different temperatures of 20°C, 40°C and 60°C. The experimental results show that the addition of hydrated lime as a partial replacement of ordinary limestone mineral filler results a significant improvement on mechanical properties and the resistant to permanent deformation of the designed asphalt concrete mixtures.

scholarly journals Evaluating Iraqi Modified Asphalt Concrete Moisture Resistance Based on Strength Ratio and Fracture Energy Parameters

2019 ◽  
Vol 2019 ◽  
pp. 1-7 ◽  
Author(s):  
Zahir Noori M. Taki ◽  
Alaa H. Abed ◽  
Hasan Al-Mosawe
Keyword(s):  
Tensile Strength ◽  
Fracture Energy ◽  
Asphalt Concrete ◽  
Asphalt Binder ◽  
Strain Curve ◽  
Strength Ratio ◽  
Performance Grade ◽  
Styrene Butadiene Styrene ◽  
Styrene Butadiene ◽  
Butadiene Styrene

Two types of polymers (plastomer (functionalized polyethylene (PE)) and elastomer (styrene-butadiene-styrene (SBS))) were used for shifting up asphalt binder performance grade (PG) and tensile strength resistance (moisture damage) of the asphalt concrete mixture. It is found that adding 3.5% functionalized polyethylene (PE) polymer to the binder is more effective than adding 4% styrene-butadiene-styrene (SBS) to shift up asphalt PG by two grades to PG 76-16. Furthermore, the viscosity of the binder increased about 200% when using 4% SBS, while there is no significant effect on viscosity when 3.5% PE is used. Therefore, there is no need to increase the temperature of mixing and compaction which may affect polymers. The indirect tensile test was used for measuring tensile strength ratio of dry and wet samples (conditioned according to ASTM D4867) and found that this ratio increased by 10 to 18% when using 4% SBS and 3.5% PE, respectively. Fracture energy (area under the strength-strain curve) and elasticity were estimated for neat and modified mixture samples.

scholarly journals Determination of Resistance to Creep Permanent Deformation of Hot Mix Asphalts Prepared with Various Additives

2018 ◽  
Vol 4 (7) ◽  
pp. 1553
Author(s):  
Erkut Yalçın ◽  
Muhammed Ertuğrul Çeloğlu ◽  
Mehmet Yılmaz ◽  
Baha Vural Kök ◽  
Taner Alataş
Keyword(s):  
Stress Level ◽  
Creep Test ◽  
Permanent Deformation ◽  
Hydrated Lime ◽  
Dynamic Creep ◽  
Styrene Butadiene Styrene ◽  
Styrene Butadiene ◽  
Effective Additive ◽  
Butadiene Styrene

In this study, the resistance of hot mix asphalts containing different additives to the creep permanent deformation was investigated by the dynamic creep test.  Four different additives were used in the study. Styrene-butadiene-styrene (SBS), American Gilsonite (AG), and Iranian Gilsonite (IG) were used for modifying the bitumen. Additionally, the same mixtures were prepared by using 2% hydrated lime as filler. The samples were subjected to dynamic creep test at 50°C under 500 kPa stress level. As a result of the tests performed, it has been determined that all of the additives used in the study improve the resistance to the creep permanent deformation. It has also been determined that the use of bitumen additives is more effective than the use of lime. Furthermore, it has been determined that the most effective additive is IG while the least effective additive is SBS, and hydrated lime use is more effective compared to the mixtures prepared with a neat binder.

Remaining Life Prediction of Asphalt Concrete Pavement under Dynamic Load

2011 ◽  
Vol 255-260 ◽  
pp. 3161-3165
Author(s):  
Min Qin ◽  
Zhao Feng Lu
Keyword(s):  
Surface Roughness ◽  
Asphalt Concrete ◽  
Permanent Deformation ◽  
Prediction Method ◽  
Concrete Pavement ◽  
Pavement Management ◽  
Remaining Life ◽  
Pavement Surface ◽  
Scientific Decision ◽  
Asphalt Concrete Pavement

With the theory of M.W.Sayers, the pavement surface roughness was simulated by the sine curve. Through the Mat lab and VC + + program, the dynamic vehicle load caused by pavement surface roughness was analyzed and calculated. Given the dynamic road and environment factors and combined the test results of highway surface roughness, the deterioration law of pavement roughness were studied by amendment Shell permanent deformation theory. A new prediction method was put forward to predict the remaining life of asphalt concrete pavement, which was proved to be reasonable and reliable and can provide a valuable basis for the scientific decision-making of asphalt pavement management.

Study on Preventing from Deformation Diseases of Dolanit Fiber Asphalt Concrete at Road Intersection

2011 ◽  
Vol 243-249 ◽  
pp. 4131-4138
Author(s):  
Long Sheng Bao ◽  
Xiao Fang Zhang ◽  
Ling Yu ◽  
Guang Shan Zhu
Keyword(s):  
Asphalt Concrete ◽  
Shear Failure ◽  
Heavy Traffic ◽  
Permanent Deformation ◽  
Concrete Pavement ◽  
The Road ◽  
Emergency Braking ◽  
Traffic Intersection ◽  
Long Time ◽  
Asphalt Concrete Pavement

Due to the heavy traffic and channelization, vehicle often brake and park for a long time at the urban road signal intersection, especially at heavy traffic intersection, for which it is easy to present permanent deformation on asphalt pavement. It can significantly improve the technical characteristics of the road intersection with adding Dolanit fiber into asphalt concrete. Based on BISAR3.0 software of applying layered elastic system theory and combined with the surface layer analysis on indoor mechanical property test to Dolanit fiber rein-forced asphalt concrete pavement, the results show that the allowable tensile stress is 0.61MPa. Even if at the condition of overload 50% and emergency braking, there is no shear failure on the Dolanit fiber rein-forced asphalt concrete pavement.

scholarly journals Evaluation of the Additives’ Behaviour to Determine the Best Modifier for Improving Asphalt Performance at High Temperature

2021 ◽  
Vol 2021 ◽  
pp. 1-10
Author(s):  
Ismail Bakheit Eldouma ◽  
Huang Xiaoming
Keyword(s):  
High Temperature ◽  
End Of Life ◽  
Vinyl Acetate ◽  
Permanent Deformation ◽  
Asphalt Binder ◽  
Ethylene Vinyl Acetate ◽  
Positive Influence ◽  
Styrene Butadiene Styrene ◽  
Styrene Butadiene ◽  
Butadiene Styrene

The current study aims to examine the physical and rheological properties at the high-temperature range of 52, 58, 64, 70, 76, and 82°C, utilizing adjusted asphalt binders. Three kinds of asphalt modifiers were selected such as styrene-butadiene-styrene, ethylene vinyl acetate, and end of life tires. The selected additives were implemented with different contents ranging from 4% to 7% by the weight of neat asphalt. Various test methods have been established, such as ductility, viscosity, microscopic inspection, and dynamic shear rheometer experiments. Results proved that the percentage decrease in ductility was 93%, 91%, and 88% with regard to the adding of the end of life tires (ELTs), ethylene vinyl acetate (EVA), and styrene-butadiene-styrene (SBS) additives, respectively. Outcomes also confirmed that viscosity was boosted from 0.411 Pa.s to 1.249, 1.0986, and 0.9785 Pa.s after adding 7% of ELTs, 7% of EVA, and 7% of SBS, respectively. The rutting parameter and complex shear modulus increased after modification, indicating the excellent performance of asphalt. The conclusions confirmed that the ELTs have fewer agglomerates and have good compatibility before ageing and excellent compatibility after the ageing process. Thus, the ELTs are deemed as efficient dispersion additive for avoiding separation during the storage and handling of the asphalt binder. Lastly, ELTs were accepted as the best enhancer for their positive influence on physical and rheological characteristics, which means higher quality amended bitumen would give higher resistance to permanent deformation.

Experience of application of epoxн asphalt concrete pavement on road bridges

2019 ◽  
pp. 78-92
Author(s):  
Vladimir Zelenovsky ◽  
◽  
Ivan Kopinets ◽  
Arthur Onishchenko ◽  
◽  
...  
Keyword(s):  
Asphalt Concrete ◽  
Concrete Pavement ◽  
Asphalt Concrete Pavement
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