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.

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.

scholarly journals Effect of Filler Nature on Chemical Resistance and Microhardness of Epoxy Composite Films

2015 ◽  
Vol 16 (3) ◽  
pp. 528-533
Author(s):  
G. Martinyuk ◽  
O. Aksimentyeva ◽  
N. Skoreiko ◽  
V. Zakordonskyi
Keyword(s):  
Mechanical Properties ◽  
Chemical Resistance ◽  
Filler Content ◽  
Epoxy Composite ◽  
Composite Films ◽  
Physical And Mechanical Properties ◽  
Epoxy Composites ◽  
Mineral Filler ◽  
Operating Characteristics ◽  
Mineral Fillers

We investigated the processes of water absorption, chemical stability and microhardness of films of epoxy composites that contained as the polymer matrix the epoxy resin UP-655 and mineral fillers: graphite, mica, aluminum oxide at their content (0 - 30 % mass). It found that introduction of mineral fillers significantly affects on all complex of operating characteristics of the films. Increase of filler content, especially mica, to 20 %, resulting in slower process and reducing the quantity of absorbed moisture by films. In the study of physical and mechanical properties of filled epoxy composites was established that the introduction of mineral filler significantly affects their microhardness, and the nature of the exposure is determined by the type and filler content.

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.

scholarly journals Assessment of Skid Resistance of Asphalt Mixtures in Laboratory Conditions

2012 ◽  
Vol 58 (4) ◽  
pp. 521-534 ◽  
Author(s):  
W. Gardziejczyk ◽  
M. Wasilewska
Keyword(s):  
Asphalt Concrete ◽  
Laboratory Tests ◽  
Asphalt Mixtures ◽  
Road Surface ◽  
Skid Resistance ◽  
Mastic Asphalt ◽  
Laboratory Conditions ◽  
University Of Technology ◽  
Road Surfaces ◽  
Stone Mastic Asphalt

AbstractThe aggregate applied for the wearing course has a significant influence on skid resistance of road surfaces. However, it is difficult to evaluate the behaviour of road surface in use on the basis of the Polished Stone Value (PSV) determined for the aggregate according to the so called ‘British method’. The British method, which is currently used in many countries, does not allow to determine the influence of neither the grain size of the aggregate nor the type of the wearing course on skid resistance of road surface. The present paper suggests a method for evaluation of the British Pendulum Number (BPN) for road surfaces in laboratory conditions. The authors assumed the BPN for polished slabs, made from asphalt mixtures, as the criterion. The index was measured with the British Pendulum Tester. The simulation of the process was conducted on research stand (called slab polisher) built at Bialystok University of Technology (BUT). The results of laboratory tests indicate that surfaces from asphalt concrete (AC) have slightly higher values of BPN in comparison with the values determined for surfaces made from stone mastic asphalt (SMA).

scholarly journals Selecting warm mix asphalt additives by the properties of warm mix asphalt mixtures - China experience

2015 ◽  
Vol 10 (1) ◽  
pp. 79-88 ◽  
Author(s):  
Xinsheng Li ◽  
Zhaoxing Xie ◽  
Wenzhong Fan ◽  
Lili Wang ◽  
Junan Shen
Keyword(s):  
Tensile Strength ◽  
Dynamic Stability ◽  
Asphalt Concrete ◽  
Warm Mix Asphalt ◽  
Asphalt Mixtures ◽  
Air Voids ◽  
Mastic Asphalt ◽  
Stone Mastic Asphalt ◽  
Crushed Aggregate ◽  
Marshall Stability

The objective of this research was to select the most effective warm asphalt additives for mix practice based on a series of laboratory testing programs such as density, Marshall stability, freeze-thaw splitting strength, dynamic stability, and bending beam strain. The experimental design of warm mix asphalt included the use of three commonlyused additives, two typical aggregate gradations, one crushed aggregate, and one modified asphalt. Results showed that: (1) the bulk specific gravity and air voids of all the mix specimens were similar to those of controls; (2) the Marshall stability and flow values of the warm stone mastic asphalt were 6.8%–26.6% and 3.5%–10.3%% higher than those of controls, respectively, and those of the warm asphalt concrete were 6.1%–15.6% and 6.5%–9.7% higher than those of controls, respectively; (3) the indirect tensile strength of two types of mixtures was 1.7%–14.4% lower than that of controls, and the average tensile strength ratio of the warm stone mastic asphalt and asphalt concrete was 4.3% and 1.3% higher than that of controls, respectively; (4) the dynamic stability of warm mix specimens was 10.8%–16.6% lower than that of the controls; (5) the average bending failure strain of warm stone mastic asphalt was 7.6% higher than that of the controls, and that of warm asphalt concrete was 12.8% lower than that of the controls; (6) Overall, warm asphalt mixtures with Sasobit and Rediset had relatively best performances required in Southeast China, where rutting and stripping are the main failures of asphalt pavements.

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.

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