scholarly journals TECHNOLOGICAL AGEING INFLUENCE ON VISCOSITY OF SELECTED BITUMENS

2003 ◽  
Vol 9 (1) ◽  
pp. 20-24
Author(s):  
Piotr Radziszewski ◽  
Robert Ziolkowski ◽  
Donatas Čygas
Keyword(s):  
Asphalt Concrete ◽  
Ageing Process ◽  
Concrete Pavements ◽  
Practical Application ◽  
Traffic Conditions ◽  
Concrete Mixtures ◽  
Different Types ◽  
Research Findings

The article presents one of the main parameters of bitumens used for asphalt concrete mixtures production—viscosity. The authors analyse technological ageing process and its influence on viscosity of selected bitumens. Dependence of the viscosity of bitumens on type and amount of the additives, temperature and ageing is described through experiments. Research findings show that the employment of different types of additives increases bitumen viscosity and positively effect the bitumen ageing resistance. Practical application of presented conclusions and recommendations will enable to improve the main characteristics of asphalt concrete pavements and traffic conditions on roads.

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.

scholarly journals Modification of bituminous binders for guss asphalt

2021 ◽  
Vol 274 ◽  
pp. 02011
Author(s):  
Marina Vysotskaya ◽  
Anastasia Kurlykina ◽  
Artem Shiryaev ◽  
Anna Tkacheva ◽  
Dmitry Litovchenko
Keyword(s):  
Asphalt Concrete ◽  
Raw Material ◽  
Structural Defects ◽  
Concrete Pavements ◽  
Self Healing ◽  
Modified Bitumen ◽  
Concrete Mixtures ◽  
Bridge Structures ◽  
Bituminous Binders ◽  
Thermal Stability Of

Over the past few years, the research of the use of cast asphalt concrete mixtures in the upper layers of the coating of bridge structures has been actively carried out. The experience gained allows us to conclude that one of the most common effective ways to improve the durability and thermal stability of cast asphalt concrete pavements is the use of modified bituminous binders. The modified bitumen part of cast asphalt concrete acts as a medium capable of initiating the «self-healing» of the composite, independently eliminating structural defects. This study aims to research the rheological characteristics of modified bituminous binders. Bitumen grade BND 50/70 was used as a raw material in the study; the following types of additives were used as its modifiers: rubber modifier (RM), EVATHERM and SBS. The optimal concentrations of the proposed additives for modification allowing to achieve the effect of structuring the mastic component of cast asphalt concrete with insignificant increases in the temperatures of mixing and compaction of mixtures based on them have been revealed.

MAIN INDICATORS OF BITUMENS OF THE AKTAU REFINERY PLANT

2021 ◽  
Vol 73 (1) ◽  
pp. 95-102
Author(s):  
S. S. Satayeva ◽  
◽  
K.A. Narikov ◽  
Keyword(s):  
Asphalt Concrete ◽  
Sharp Decrease ◽  
Concrete Pavements ◽  
Concrete Mixtures ◽  
Road Surfaces ◽  
Petroleum Bitumen ◽  
Technical Specifications ◽  
The Republic ◽  
Refinery Plant ◽  
Standard Terms

The practice of operating highways in the Republic of Kazakhstan shows that the durability of asphalt concrete pavements on them is much lower than the standard terms. Therefore, the maintenance of highways in a condition that meets the requirements of traffic flows is impossible without the use of new, progressive materials and technologies. The main factor affecting a sharp decrease in the service life of road surfaces is the use of lowquality bitumen in asphalt-concrete mixtures as a binder, since microcracks develop mainly in its film. The article deals with artificially synthesized bitumens of the Aktau bitumen plant: The following indicators of petroleum bitumen were studied: penetration, extensibility properties, brittleness temperature, softening and ignition temperature. It has been proven that the results obtained correspond to the technical specifications.

scholarly journals An investigation of the effect of thermoplastic additives in asphalt concrete mixtures on the properties of different types of asphalt concrete

2021 ◽  
Vol 2 (6 (110)) ◽  
pp. 61-70
Author(s):  
Valeriy Zhdaniuk ◽  
Oleksandr Volovyk ◽  
Dmytro Kostin ◽  
Sergey Lisovin
Keyword(s):  
Asphalt Concrete ◽  
Crushed Stone ◽  
Thermoplastic Polymers ◽  
Rutting Resistance ◽  
Fine Grained ◽  
Mastic Asphalt ◽  
Concrete Mixtures ◽  
Different Types ◽  
Stone Mastic Asphalt ◽  
Positive Effect

The effect of modification of asphalt concrete mixtures of different grain sizes with “Ric-Polycell” (Ukraine) and “Duroflex®-SMA” thermoplastic polymers (Germany), which were added directly to the asphalt mixer during their preparation, on the properties of asphalt concrete was studied. It is confirmed that it is more expedient to use stone mastic asphalt concretes with a larger size of mineral crushed stone grains on high-traffic roads, as they are more rutting-resistant compared to asphalt concretes with smaller size and content of crushed stone grains. The effect of the temperature of preparation and thermostating of asphalt concrete mixtures modified with the investigated thermoplastics on the compressive strength of asphalt concrete at a temperature of 50 °С, which were made of the studied mixtures, was investigated. It was found that the maximum possible temperatures of preparation and thermostating of asphalt concrete mixes provide a more complete modification. The effect of the content of thermoplastic polymers in the composition of asphalt concrete mixtures on the properties and rutting resistance of fine-grained asphalt concrete, as well as stone mastic asphalt concrete, was studied. It was found that adding the “Ric-Polycell” polymer in the amount of 1.5 % and 3 % by weight of bitumen in the composition of the studied asphalt mixtures in the asphalt mixer during their preparation increases the rutting resistance of asphalt concrete under the studied conditions by 2.52–3.86 times. Modification of asphalt concrete mixtures with the “Duroflex®-SMA” additive in the amount of 0.3 % and 0.6 % by weight of the aggregate by a similar technology also allows increasing the rutting resistance of the obtained asphalt concrete by 1.86–3.16 times. Using these modifiers in the future will have a positive effect on the service life of the entire pavement structure

scholarly journals Research progress of steel slag asphalt concrete

2020 ◽  
Vol 175 ◽  
pp. 11014
Author(s):  
Jian Sun ◽  
Andrii Bieliatynskyi ◽  
Kateryna Krayushkina ◽  
Oleksandra Akmaldinova
Keyword(s):  
Asphalt Concrete ◽  
Steel Slag ◽  
Research Progress ◽  
Practical Application ◽  
Excellent Performance ◽  
At Home

Steel slag asphalt concrete is one of the important components of asphalt concrete. There are some differences between the steel slag asphalt concrete and ordinary asphalt concrete. Based on the research of scholars at home and abroad, this paper systematically introduces the steel slag characteristics and excellent performance of steel slag asphalt concrete, summarizes the problems existing in the practical application of steel slag asphalt concrete, and provides references for its promotion and application.

Sign in / Sign up

Export Citation Format

Share Document