scholarly journals Enhancement of Electrical and Mechanical Properties of Modified Asphalt Concrete with Graphite Powder

2022 ◽  
Vol 8 (1) ◽  
pp. 124-133
Author(s):  
Ziane Zadri ◽  
Bachir Glaoui ◽  
Othmane Abdelkhalek
Keyword(s):  
Mechanical Properties ◽  
Electrical Resistivity ◽  
Asphalt Concrete ◽  
Research Work ◽  
Graphite Powder ◽  
Climatic Conditions ◽  
Dissipated Energy ◽  
Modified Asphalt ◽  
Mechanical And Electrical Properties ◽  
Concrete Mixtures

A large number of additives are introduced in asphalt concrete mixtures in purpose of improving the properties of resistance, facing the increasing traffic and more severe climatic conditions. This will guarantee the good comfort for a longer exploitation time. In this article we used graphite powder as an unconventional additive, and then investigate its effect mainly on the electrical resistivity which is in context of our research work on conductive asphalt (with a resistivity around 106 Ω m), As well as on its mechanical properties evaluated using the new Fenix test that gives many information of mechanical especially dissipated energy. A significant improvement was noticed in the reduction of resistivity by reaching 1.7 × 106Ω m and also greater resistance to cracking based on variation of dissipated energy as a result we concluded that introducing graphite powder with an appropriate amount enhance both mechanical and electrical properties asphalt concrete. Doi: 10.28991/CEJ-2022-08-01-09 Full Text: PDF

scholarly journals Evaluation of Mechanical properties for polypropylene Modified Asphalt concrete Mixtures

2017 ◽  
Vol 5 (12) ◽  
pp. 7797-7801 ◽  
Author(s):  
Safaa Moubark ◽  
Farag Khodary ◽  
Ayman Othman
Keyword(s):  
Mechanical Properties ◽  
Low Temperature ◽  
Asphalt Concrete ◽  
Road Traffic ◽  
Modified Asphalt ◽  
Concrete Mixtures ◽  
Low Temperature Cracking ◽  
Asphalt Modification ◽  
Indirect Tensile ◽  
Polymer Modified Asphalt

It is noticeable that the increase of road traffic during the last two decades in addition to the insufficient degree of maintenance caused an accelerated deterioration of road structure. These roads show early signs of distress such as rutting, cracking, low temperature cracking, ageing and stripping. Heavier loads and higher traffic volume demand higher performance of pavement.  Excellent performance of pavement requires bitumen that is less susceptible to high temperature, rutting or low temperature cracking. Several additives are used to increase the performance of bitumen and the quality of the produced mixtures. Polymers are considered the most widely used additives in asphalt modification that give better performance. The performance of the Polymer-modified asphalt depends on the type and the level of modification the used polymer. The choice of modification level and t modification type depends on the physical properties of the polymer, and its compatibility with bitumen. The polymer can be loosely classified into two categories, Plastomers and Elastomers. The results indicated that, the addition of polypropylene generally improved the mechanical properties of the mixture regardless of the percentage of polymers that added and (PP) content of 5%. it can be noticed that  the performance of PP-modified asphalt mixtures is better  compared with unmodified asphalt concrete mixtures  modifier because it has the highest Marshall Stiffness, indirect tensile strength and unconfined compressive strength

scholarly journals THERMAL CONDITIONS OF ROAD PAVEMENTS AND THEIR INFLUENCE ON MOTOR TRAFFIC

Transport ◽  
2003 ◽  
Vol 18 (1) ◽  
pp. 23-31 ◽  
Author(s):  
Alfredas Laurinavičius ◽  
Donatas Ďygas
Keyword(s):  
Asphalt Concrete ◽  
Thermal Conditions ◽  
Climatic Conditions ◽  
Concrete Pavement ◽  
Concrete Pavements ◽  
Road Asphalt ◽  
Concrete Mixtures ◽  
Research Findings ◽  
The Republic ◽  
Asphalt Concrete Pavement

The article presents the analysis of climatic conditions in the Republic of Lithuania and describes their influence on road asphalt concrete pavement. Dependence of the main properties of asphalt concrete mixtures on tempera~re is described with the help of carried out experiments. Research findings show that the probability of plastic defomations (rutting and corrugation) in asphalt concrete pavement is higher when the pavement temperature IS 20-40 C. Ptactical application of the presented conclusions and recommendations will enable to reduce the occurrence of undesirable deformations in asphalt concrete pavements and to improve traffic conditions on the roads.

Study on the Piezoresistivity Character of Electrically Conductive Asphalt Concrete

2011 ◽  
Vol 233-235 ◽  
pp. 1756-1761 ◽  
Author(s):  
Xiao Ming Liu ◽  
Shao Peng Wu
Keyword(s):  
Asphalt Concrete ◽  
Raw Materials ◽  
Great Influence ◽  
Graphite Powder ◽  
Crumb Rubber ◽  
Highway Traffic ◽  
Electrically Conductive ◽  
Intelligent Monitoring ◽  
Modified Asphalt ◽  
Sbs Modified Asphalt

Raw materials, such as SBS modified asphalt, graphite powder and crumb rubber were selected to blend with aggregate mixture to product electrically conductive asphalt concrete. Experimental results demonstrated the stress or strain had a great influence on the resistance of conductive asphalt concrete, which exhibited sensitive piezoresistivity. In fact, the piezoresistivity reflects the change in microstructure. The reason for piezoresistivity may involve proximity effect, microcrack and the dislocation of conductive paths due to shear strength of aggregates. With further study on the variation of the resistance, it is hopeful to explore the microstructure change of asphalt concrete under dynamic compressive stress. Therefore this new-style asphalt concrete has extensively practical foreground in fatigue damage testing, highway traffic intelligent monitoring and so on.

Physical and Mechanical Properties of the Road Surface when Replacing the Finely Crushed Mineral Part of Asphalt Concrete with Porcelain Stoneware Production Waste

2021 ◽  
Vol 1043 ◽  
pp. 101-107
Author(s):  
Natalia Yatsenko ◽  
Alexandr Evforitsky ◽  
Natalya Kotenko
Keyword(s):  
Mechanical Properties ◽  
Asphalt Concrete ◽  
Water Resistance ◽  
Physical And Mechanical Properties ◽  
High Strength ◽  
Type B ◽  
Grain Composition ◽  
The Road ◽  
Concrete Mixtures ◽  
Additional Hydrogen

The possibility of using waste porcelain stoneware - a high-strength non-porous, dense material as a finely crushed mineral part of asphalt concrete with 0-5 mm fraction has been established. The adhesive additive Bitaden content was revealed, that intensifies porcelain stoneware interaction with bitumen due to the additional hydrogen bonds formation, the particles’ contact plane activation with the action of van der Waals forces. The conditions for obtaining asphalt concrete mixtures of type B, grade 1 and G, grade 2 of the optimal grain composition with a reduced content of BND 60/90 bitumen have been developed. Physical and mechanical properties are characterized by an increase in the water resistance of asphalt concrete samples based on porcelain stoneware, compressive strength and shear resistance.

Investigation of the effects of different polymer-modified asphalt cements on asphalt mixes at low temperature

2007 ◽  
Vol 34 (5) ◽  
pp. 589-597 ◽  
Author(s):  
K Kandil ◽  
A O Abd El Halim ◽  
Y Hassan ◽  
A Mostafa
Keyword(s):  
Low Temperature ◽  
High Resistance ◽  
Asphalt Concrete ◽  
Elevated Temperatures ◽  
Winter Season ◽  
Experimental Program ◽  
Asphalt Cement ◽  
Modified Asphalt ◽  
Concrete Mixtures ◽  
Polymer Modified Asphalt

The extreme environmental conditions in Canada require the use of asphalt cement that can provide a high resistance to low-temperature cracking during the winter season and a high resistance to rutting due to the elevated temperatures in the summer. Earlier studies showed that such desired improvements in the quality of asphalt cement could be achieved using polymer-modified asphalt (PMA) cement. This paper presents a three-phase experimental program that was carried out to evaluate the expected performance of asphalt concrete mixtures with PMA compared to asphalt concrete mixtures with conventional and air-oxidized asphalt binders. The results of this study show that PMA in asphalt concrete mixes would significantly improve the resistance to cracking (loading and low-temperature). Key words: asphalt mixtures, polymer-modified asphalt, conventional asphalt cement, air-oxidized asphalt, testing.

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