Study of the Influence of Thin-Dispersed Powders on the Structuring Ability of Stabilizing Additives

2019 ◽  
Vol 974 ◽  
pp. 37-42
Author(s):  
A.I. Trautvain ◽  
V.V. Yadykina ◽  
S.S. Tobolenko
Keyword(s):  
Organic Binder ◽  
Crushed Stone ◽  
Mastic Asphalt ◽  
Educational Standard ◽  
Run Off ◽  
Stone Mastic Asphalt ◽  
Mineral Powder ◽  
State Educational ◽  
Mineral Fillers ◽  
Positive Effect

The article presents the results of the study of the bitumen-retaining ability of stabilizing additives developed on the basis of cellulose-paper waste and finely dispersed fillers of various genesis. Analysis of the test results of crushed stone-mastic asphalt mixtures of the same composition showed that all additives provide the value of the runoff index of the organic binder in the mixture, which meets the requirement of the State Educational Standard No. 31015-2002. The introduction of mineral fillers into the stabilizer contributes to a decrease in the studied parameter, which is due to the additional structuring effect. For a two-component additive (without mineral filler), the studied indicator has the greatest value, exceeding the recommended limit. It is important to note that the use of mineral powder in the composition of stabilizing additives has a positive effect on the flow of the binder. Mineral powder, due to the structuring effect on bitumen and the formation of a microporous structure, reduces the run-off rate of the binder. This is due to the fact that bitumen, being in thin interlayers and small pores, falls into the region of influence of the molecules of the surface layer of the mineral part, increasing the density of granules and facilitating the granulation process of the additive. The minimum runoff of the organic binder is observed in the preparation of crushed stone-mastic asphalt-concrete mix with additives based on mechanically activated wastes of wet magnetic separation of ferruginous quartzites and is 0.07.

scholarly journals CRAWLER-MASTIC ASPHALT CONCRETE WITH THE USE OF BITUMEN MODIFIED BY SEVILEEN

2021 ◽  
Vol 6 (8) ◽  
pp. 8-16
Author(s):  
S. Navolokina ◽  
V. Yadykina ◽  
Anatoliy Gridchin
Keyword(s):  
Vinyl Acetate ◽  
Asphalt Concrete ◽  
Heavy Traffic ◽  
Crushed Stone ◽  
The Road ◽  
Mastic Asphalt ◽  
Modified Binders ◽  
Entire Complex ◽  
Stone Mastic Asphalt ◽  
Positive Effect

Heavy traffic reduces the strength characteristics of asphalt concrete, causes peeling on the pavement. Crushed stone-mastic asphalt concrete is designed for the device of the upper layers of the coating on roads with high traffic intensity. The use of polymerasfalt concrete on a modified binder can lead to an improvement in the physical and mechanical characteristics of asphalt concrete and increase its re-sistance to climatic influences. The main aspects of improving the quality of crushed stone-mastic as-phalt concrete (SMA) due to the use of a binder modified with sevilen (SEVA) are discussed. The effect of bitumen containing sevilen with 22 and 29 % vinyl acetate groups on the properties of crushed stone-mastic asphalt concrete has been investigated. Analysis of the results showes that the use of modified binders has a positive effect on the entire complex of physical and mechanical parameters of polymer asphalt concrete. An increase in the strength of the samples at 20 and 50 °C, a decrease in this indicator at 0 °C is established. The indicators of water and heat resistance, shear resistance and crack resistance are also improved, which should have a positive effect on the durability of the road surface. Rational concentrations of polymer additives and the amount of vinyl acetate groups in its composition have been established. The adhesion of the binder to the mineral part of the asphalt con-crete mixture is estimated. The index of sensitivity to temperature differences of asphalt concrete sam-ples is considered due to the fact that asphalt concrete is a material that reacts to temperature fluctua-tions in the external environment. The analysis of the results of the tests carried out demonstrates that the use of modified binders has a positive effect on the entire complex of physical and mechanical pa-rameters of polymer asphalt concrete.

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 Development of the composition of crushed stone and mastic asphalt with increased resistance to rutting for the device wear layer for roads with high traffic

2018 ◽  
Vol 5 (4) ◽  
Author(s):  
Dmitriy Gofman ◽  
Maksim Katasonov ◽  
Andrey Kochetkov ◽  
Yuliya Gaydaychuk ◽  
Diana Kirichuk
Keyword(s):  
Asphalt Concrete ◽  
Asphalt Binder ◽  
Crushed Stone ◽  
Protective Layers ◽  
Mastic Asphalt ◽  
Highly Active ◽  
Mineral Components ◽  
Stone Mastic Asphalt ◽  
Pros And Cons ◽  
Mineral Powder

The paper considers the use of crushed stone-mastic asphalt mixtures laid with a small thickness as protective layers of wear of roads. The General characteristics of mixtures and their components are given, the pros and cons, as well as the possibility of their application are given. As a mineral powder, it is recommended to use lime-containing waste (calcium oxide hydrate) of the chemical industry. The effective increase of shear resistance of the protective wear layer with the subsequent prevention of the formation of a track on the coating due to the use of lime-containing waste, which has a highly active structuring effect on bitumen with a slowdown in its aging in the asphalt binder, subject to the principles of sufficient water resistance and crack resistance of asphalt concrete. The replacement of mineral powder with lime-containing waste in the composition of crushed-mastic asphalt concrete with the same mass amount of other mineral components and bitumen indicates a significant increase in quality indicators.

scholarly journals CRUSHED STONE MASTIC ASPHALT CONCRETE USING GRAYISH TECHNOLOGIES

2020 ◽  
pp. 18-25
Author(s):  
A. Kurlykina ◽  
V. Denisov ◽  
D. Kuznecov ◽  
E. Lukash
Keyword(s):  
Asphalt Concrete ◽  
Road Construction ◽  
Quality Criterion ◽  
Quality Criteria ◽  
Physicomechanical Properties ◽  
Crushed Stone ◽  
Road Asphalt ◽  
Mastic Asphalt ◽  
Used Oil ◽  
Stone Mastic Asphalt

One of the main reasons for reducing the service life of road asphalt pavements (the appearance and development of damage in the form of ruts, various kinds of plastic deformations, potholes, cracks, etc.) is the low quality of the used oil bitumen. The physicomechanical properties of road bitumen are subject to stricter requirements, especially for organic binders used for the production of crushed stone mastic asphalt (SMA), therefore, in authors’ view, the development of bitumen binders with enhanced physicomechanical properties is one of the key and most urgent tasks in road construction. This problem is solved by introducing various modifiers into the binder. This article presents the results of a study of bitumen modified by introducing technical sulfur into the composition. The effect of binder modification on the physicomechanical properties of road asphalt concrete is shown on the example of crushed stone mastic asphalt (SMA-20) relative to base samples made to control the dynamics of changes in the properties of composites made using sulfur-raising technologies. For a comprehensive assessment of the effectiveness of modifying crushed stone mastic asphalt concrete based on various binders, a generalized quality criterion is calculated, taking into account the calculated particular quality criteria and various values of the weight coefficients. The comparison and analysis of the obtained efficiency criteria is made.

Influence of the Type of the Fiber Component of the Stabilizing Additive for Stone Mastic Asphalt Concrete on the Structure of an Organic Binder

2016 ◽  
Vol 835 ◽  
pp. 494-500 ◽  
Author(s):  
Valentina V. Yadykina ◽  
Anatoly M. Gridchin ◽  
Anna Ivanovna Trautvain ◽  
Sergey Sergeyevich Tobolenko
Keyword(s):  
Asphalt Concrete ◽  
Cellulose Fiber ◽  
Organic Binder ◽  
Fiber System ◽  
Adsorption Activity ◽  
Mastic Asphalt ◽  
Needle Penetration ◽  
Plastic Strength ◽  
Asphalt Mix ◽  
Stone Mastic Asphalt

The evaluation of the quality of the fibrous filler, which is part of stabilizing additives for the production of stone mastic asphalt concrete, can be carried out on the basis of researching its structuring role to a binding material, which was studied by the following parameters: the depth of needle penetration, elongation at 25 and at 0°C, the softening point, cohesion, elasticity and plastic strength. It is found that the fiber made of high-density microporous cellulose-paper waste have the highest adsorption activity and structuring capacity to the organic binder. Moreover, the adding fiber in amount of 1% of the initial bitumen weight allows forming the more rigid framework of the "tar - cellulose fiber" system, which corresponds to the introduction of 0.5% of stabilizing additive to the stone mastic asphalt mix (SMAM), that is, the amount close to recommended regulations.

Features of the Formation of Properties of Stone-Mastic Asphalt Concrete Based on a Warm Polymer Modified Binder

2020 ◽  
Vol 992 ◽  
pp. 200-205
Author(s):  
S.Yu. Shekhovtsova
Keyword(s):  
Asphalt Concrete ◽  
Crushed Stone ◽  
Chemical Additives ◽  
Green Technologies ◽  
Modified Bitumen ◽  
Asphalt Mixes ◽  
Mastic Asphalt ◽  
Stone Mastic Asphalt ◽  
Modified Binder ◽  
Physical And Chemical

Stone mastic asphalt concrete is one of the main types of asphalt concrete used for the construction of road surfaces. The quality, reliability and longevity of which depends on road safety of vehicles. To reduce the intensity of aging processes occurring at the stage of production and laying of asphalt concrete, "green" technologies are used, based on the use of physical and chemical processes that reduce the viscosity of bitumen to produce warm asphalt mixtures. This paper discusses the features of the formation of properties of crushed stone-mastic asphalt mixes SMA-15 based on polymer bitumen modified, compacted at lower temperatures, relative to traditional asphalt concrete. The influence of chemical additives of domestic and foreign production of DAD-TA and Cecabase RT 945 on the properties of modified binder and asphalt concrete was studied. It was established that they have a positive plasticizing effect on the modified bitumen binder in crushed stone-mastic asphalt concrete without a decrease in heat resistance and adhesive strength, which made it possible to compact asphalt concrete samples at low temperatures (up to 130°C) without negatively affecting the strength and deforming properties of asphalt concrete.

Improvement of crushed stone – mastic asphalt laying by improving of the conditions of its transportation

2021 ◽  
Vol 2021 ◽  
pp. 139-143
Author(s):  
Denis Shpin ◽  
Keyword(s):  
Asphalt Mixture ◽  
Sharp Decrease ◽  
Modern Technology ◽  
Crushed Stone ◽  
Dump Truck ◽  
The Road ◽  
Mastic Asphalt ◽  
Road Pavement ◽  
Stone Mastic Asphalt ◽  
Urban Conditions

Introduction. Transport times of hot asphalt from its production facility to the road section of laying depends of the distance of the asphalt mixing plants location, also in urban conditions it depends from the intensity of traffic flows, the number of traffic jams on the way of the dump truck.Problems. At the present stage, a sharp decrease of road pavement quality and durability occurs due to an increase of the number of heavy vehicles, an increase of axle loads on the pavement and an increase in the speed limit, due to use of outdated technologies that not correspond to the existing loads by their technical characteristics.Purpose. To analyze the modern technology of crushed stone — mastic asphalt transportation in order to determine the shortcomings in its application.Materials and methods. Analysis of information sources, including foreign sources regarding transportation technologiesResults.Possible consequences of non-observance of the correct transportation technology and their elimination have been determined.Conclusions. During the transportation of crushed stone — mastic asphalt mixture, the temperature and fractional segregation (dissection) of the hot mixture occurs. The main factors that cause it are following: ambient temperature, air humidity, wind speed, bulk filling, transport times, pavement flatness during transportation. To prevent the segregation appearance, it is need to increase the loading rate of the dump truck bulk, using heat-insulating elements during transportation (awnings, metal covers, etc.), also as thorough cleaning of the dump truck bulk surface from any residuals of bituminous and other materials before each loading of crushed stone-mastic asphalt.Keywords: crushed stone-mastic asphalt, temperature segregation, transportation technology.

scholarly journals THE EFFECT OF STABILIZING ADDITIVES ON THE STABILITY OF ASPHALT CONCRETE TO THE EFFECTS OF WEATHER AND CLIMATIC FACTORS

2021 ◽  
Vol 6 (12) ◽  
pp. 8-15
Author(s):  
V. Yadykina ◽  
S. Tobolenko ◽  
A.M. Gridchin ◽  
K. Vyrodova
Keyword(s):  
Mechanical Properties ◽  
Magnetic Separation ◽  
Asphalt Concrete ◽  
Climatic Factors ◽  
Paper Industry ◽  
Physical And Mechanical Properties ◽  
Mastic Asphalt ◽  
Activated State ◽  
Stone Mastic Asphalt ◽  
Mineral Fillers

The article presents the results of studies on the influence of stabilizing additives from industrial waste on the change in the physical and mechanical properties of asphalt concrete as a result of the influence of weather and climatic factors. Microporous waste from the pulp and paper industry of high density (corrugated cardboard), mineral fillers from limestone and waste from wet magnetic separation of ferruginous quartzites in a stable and activated state and a bituminous emulsion are used as initial components. As a criterion for assessing the influence of weather and climatic factors on the physical and mechanical properties of the stone mastic asphalt, the coefficient of degradation of their values was used. It is found that after one and three years of conditional exposure to weather and climatic factors, there was an increase in the tensile strength at splitting and a decrease in the compressive strength at temperatures of 20 and 50 °C of samples of all compositions of the stone mastic asphalt, which is associated with the aging of the binder and the separation of the bitumen film from the surface of mineral materials and components of the stabilizing additive. It is shown that as a result of the introduction of mineral fillers into the composition of stabilizing additives, their bitumen-retaining ability increases, which indicates an increase in the structuring effect of the stabilizer and helps to slow down aging. The most effective was shown by a stabilizing additive containing freshly ground wet magnetic separation waste, which is explained by their high adsorption capacity in relation to an organic binder. It is found that the stone mastic asphalt using the developed stabilizing additive undergoes significantly less degradation as a result of the influence of weather and climatic factors than asphalt concrete on a traditional Viatop stabilizer.

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