scholarly journals Structured asphalt binder is a new binder type in asphalt concrete mixtures

2021 ◽  
Vol 8 (3) ◽  
Author(s):  
Denis Gerasimov ◽  
Aleksey Ignatev ◽  
Valery Gotovtsev
Keyword(s):  
Asphalt Concrete ◽  
Water Saturation ◽  
Asphalt Binder ◽  
Experimental Studies ◽  
Technical Performance ◽  
Concrete Mixtures ◽  
Binder Type ◽  
Powder Particles ◽  
Mineral Powder ◽  
Time Changes

The data presented in the article are part of disserta-tion research on the formula development and pro-duction principle of composite material for road con-struction with phosphogypsum and secondary poly-ethyleneterephthalate use. The article provides an assessment of the existing most successful and effec-tive technologies for creating asphalt concrete pave-ments with high technical performance characteris-tics, and the key role in formula is an asphalt binder on the binary system mineral powder/oil road bitu-men basement, their main advantages and disad-vantages are described. A new technological method for the asphalt concrete mixtures production is de-scribed - pelletization by rolling, which was proposed by the authors. The paper presents the study's results to determine the structured asphalt binder technical and operational properties obtained by the method of pelletization by rolling. A brief theoretical substantia-tion of the physicochemical nature of improving a number of developed composition technical and op-erational characteristics of a structured asphalt binder is presented. The dynamics of over time changes in the main structured asphalt binder indicators, from 2005 to 2019, are given. It has been theoretically proven that in a structured asphalt binder obtained by the method of pelletization by rolling, bitumen is in a film state, and the bitumen interlayers thickness be-tween the mineral powder particles is of the order of 100 nm, which makes it possible to classify the prod-uct as a nanomaterial and determines its special properties set. The data of independent and our own experimental studies are also presented, indicating the previously obtained theoretical justification correct-ness for increasing the strength indicators, improving the water saturation indicators, and the water re-sistance coefficient. The absence of negative changes in the main technical and operational properties dy-namics for 14 years confirms the possibility of storing the mixture in a cold form outside a sealed package in an unheated room, which makes it possible to assert the possibility of preparing material for future use and transporting it over unlimited distances

scholarly journals Structured asphalt binder is a new binder type in asphalt concrete mixtures

2021 ◽  
Vol 8 (3) ◽  
Author(s):  
Denis Gerasimov ◽  
Aleksey Ignatev ◽  
Valery Gotovtsev
Keyword(s):  
Asphalt Concrete ◽  
Water Saturation ◽  
Asphalt Binder ◽  
Experimental Studies ◽  
Technical Performance ◽  
Concrete Mixtures ◽  
Binder Type ◽  
Powder Particles ◽  
Mineral Powder ◽  
Time Changes

The data presented in the article are part of disserta-tion research on the formula development and pro-duction principle of composite material for road con-struction with phosphogypsum and secondary poly-ethyleneterephthalate use. The article provides an assessment of the existing most successful and effec-tive technologies for creating asphalt concrete pave-ments with high technical performance characteris-tics, and the key role in formula is an asphalt binder on the binary system mineral powder/oil road bitu-men basement, their main advantages and disad-vantages are described. A new technological method for the asphalt concrete mixtures production is de-scribed - pelletization by rolling, which was proposed by the authors. The paper presents the study's results to determine the structured asphalt binder technical and operational properties obtained by the method of pelletization by rolling. A brief theoretical substantia-tion of the physicochemical nature of improving a number of developed composition technical and op-erational characteristics of a structured asphalt binder is presented. The dynamics of over time changes in the main structured asphalt binder indicators, from 2005 to 2019, are given. It has been theoretically proven that in a structured asphalt binder obtained by the method of pelletization by rolling, bitumen is in a film state, and the bitumen interlayers thickness be-tween the mineral powder particles is of the order of 100 nm, which makes it possible to classify the prod-uct as a nanomaterial and determines its special properties set. The data of independent and our own experimental studies are also presented, indicating the previously obtained theoretical justification correct-ness for increasing the strength indicators, improving the water saturation indicators, and the water re-sistance coefficient. The absence of negative changes in the main technical and operational properties dy-namics for 14 years confirms the possibility of storing the mixture in a cold form outside a sealed package in an unheated room, which makes it possible to assert the possibility of preparing material for future use and transporting it over unlimited distances.

scholarly journals INCREASING THE EFFICIENCY OF MINERAL POWDER FROM TECHNOGENIC RAW MATERIALS DUE TO ITS HYDROPHOBIZATION

2020 ◽  
Vol 3 (4) ◽  
pp. 24-30
Author(s):  
V. Yadykina ◽  
Anatoliy Gridchin ◽  
E. Kuznecova ◽  
M. Lebedev
Keyword(s):  
Asphalt Concrete ◽  
Water Resistance ◽  
Moisture Absorption ◽  
Water Saturation ◽  
Raw Materials ◽  
Maximum Shear Stress ◽  
Asphalt Binder ◽  
Before And After ◽  
Mineral Powder ◽  
Technogenic Raw Materials

a promising direction in solving the problem of obtaining high-quality asphalt concrete is the use of mineral fillers, including from industrial waste. The article considers the use of OEMK slag as a mineral powder in the asphalt concrete mix. The influence of hydrophobization of mineral powder by GF Preparation on moisture absorption and its structuring ability to change the maximum shear stress from the content of mineral powder before and after hydrophobization was studied. It is established that the treatment of the filler provides the necessary hydrophobicity of the mineral material, reduces the bituminous capacity, water saturation, porosity of the asphalt binder, and increases its strength and water resistance. The results of studies of the main characteristics of asphalt concrete on the example of a mixture of type G III of the brand showed that as a result of hydrophobization, the strength, water resistance, water saturation, and swelling of the composite significantly increase

scholarly journals STUDY OF PHYSICAL-MECHANICAL PROPERTIES OF ASPHALT-CONCRETE SPECIMENS ON ACTIVATED MINERAL POWDERS OF VARIOUS COMPOSITIONS

2020 ◽  
pp. 44-50 ◽  
Author(s):  
Anna Trautvain ◽  
V. Yadykina ◽  
E. Mulenko
Keyword(s):  
Asphalt Concrete ◽  
Mechanical Characteristics ◽  
Raw Materials ◽  
Planetary Mill ◽  
Concrete Mixtures ◽  
Proportional Change ◽  
Different Temperatures ◽  
Mineral Powder ◽  
Mineral Core ◽  
Ferruginous Quartzites

the article presents the results of testing asphalt samples based on activated mineral powder from silica-containing raw materials. Activated filler was obtained by joint grinding of waste wet magnetic separation (WMS) of ferruginous quartzites of the Kursk Magnetic Anomaly in a spherical planetary mill in the presence of surfactants (stearic acid, adhesive additive Amdor-10) and bitumen. First of all, it should be noted that the use of activated mineral powder in the composition of asphalt concrete mixture led to an increase in the packing density of the composite. This was reflected not only in the technological process, but also contributed to the decrease in the porosity of the mineral core. It was found that the use of surfactants in the process of grinding mineral powder made it possible to increase the strength of asphalt concrete samples. However, the change in the crack resistance and shear resistance of asphalt concrete specimens, determined from the ratio of the corresponding compressive strengths, did not occur (table). This is due to the fact that there has been a proportional change in all the strength characteristics at different temperatures. Analysis of the physical-mechanical characteristics of the properties of asphalt concrete led to the conclusion that it was possible to use activated mineral powder from waste WMS as a component of asphalt concrete mixtures.

scholarly journals Possibilities of using the dispersed waste of asphalt-concrete plants in the Republic of Buryatia

2018 ◽  
Vol 212 ◽  
pp. 01011 ◽  
Author(s):  
Nikolay Shestakov ◽  
Vyacheslav Tsyrenzhapov ◽  
Victoria Rosina ◽  
Andrey Komarov
Keyword(s):  
Asphalt Concrete ◽  
Concrete Mixtures ◽  
Dispersed Filler ◽  
Dust Entrainment ◽  
Mineral Powder ◽  
The Republic ◽  
Continental Climate

This article considers the possibility of using the dispersed waste of asphalt-concrete plants, namely the dust-entrainment, which is formed during the drying and heating of inert materials and accumulates in special dust-collecting facilities. The material under investigation corresponds to a finely dispersed filler used for the production of asphalt concrete mixtures for a number of features. It has been established that substitution of up to 50% of the mineral powder with its own dust-entrainment allows obtaining asphalt-concrete mixtures satisfying the requirements for the sharply continental climate.

Experimental Testing and Analysis Procedure to Determine the Apparent Film Thickness of Asphalt Binder in Fine Aggregate Matrix Mixtures

2021 ◽  
Vol 2675 (7) ◽  
pp. 166-179
Author(s):  
Lucas Henrique Vieira ◽  
Thiago Delgado de Souza ◽  
Alexis Jair Enríquez-León ◽  
Francisco Thiago Sacramento Aragão ◽  
Otávio da Fonseca Martins Gomes ◽  
...  
Keyword(s):  
Film Thickness ◽  
Asphalt Concrete ◽  
Experimental Testing ◽  
Asphalt Binder ◽  
Analysis Procedure ◽  
Fine Aggregate ◽  
Concrete Mixtures ◽  
Proper Design ◽  
Fine Aggregate Matrix ◽  
Imagej Software

The fine aggregate matrix (FAM) is an important constituent of an asphalt concrete mixture; the FAM is where some key damage phenomena such as cracking start and propagate. The proper design and fabrication of isolated FAM testing samples that are representative of the material existing within asphalt concrete mixtures requires the objective determination of key characteristics such as the apparent film thickness (FT) of the asphalt binder and the specific surface area of the aggregates. These relevant parameters facilitate the estimation of the binder content. This study presents an experimental testing and analysis protocol to determine the apparent FT that covers particles of fine aggregate in FAM mixtures. The method is based on tests using a scanning electron microscope and a digital image analysis procedure using the open-source Fiji/ImageJ software. The results indicated that apparent FT ranged between 0.5 µm and 30 µm. An additional validation effort was pursued and demonstrated the applicability of the proposed methodology, which can provide meaningful information to improve volumetric-based FAM mix design methods and generate materials that are more representative of those existing in the asphalt concrete mixtures.

scholarly journals Evaluating the Role of Aggregate Gradation on Cracking Performance of Asphalt Concrete for Thin Overlays

2019 ◽  
Vol 9 (4) ◽  
pp. 628 ◽  
Author(s):  
Lívia Garcia-Gil ◽  
Rodrigo Miró ◽  
Félix Pérez-Jiménez
Keyword(s):  
Asphalt Concrete ◽  
Material Selection ◽  
Asphalt Binder ◽  
Asphalt Mixture ◽  
Fine Fraction ◽  
Aggregate Size ◽  
Aggregate Gradation ◽  
Concrete Mixtures ◽  
Cracking Performance

Thin asphalt concrete overlays are a maintenance technique that mainly restore the functional properties of pavements. One of the main issues in thin overlays is reflective cracking that can cause early deterioration and reduce their service life. For this reason, the purpose of this investigation is to evaluate the effect of material selection on cracking performance of asphalt concrete mixtures for thin overlays. In particular, this paper evaluates the role of aggregate skeleton gradation. The study of the effect of aggregate gradation was divided into two stages: (1) fine fraction content and (2) maximum nominal aggregate size. Based on this, up to seven asphalt mixture gradations were designed and evaluated through the Fénix test at different test temperatures. The results showed a significant correlation between the fine fraction content, and maximum nominal aggregate size, and the cracking performance of the asphalt concrete mixtures. Mixtures manufactured with a low content of fine aggregates, as well as small nominal maximum size, experienced a further improvement of their toughness. These results reflected the importance of considering not only the effect of asphalt binder and environmental conditions but also aggregate gradation in the design of asphalt concrete mixtures in order to achieve a desirable cracking performance.

scholarly journals Assessing the Moisture and Aging Susceptibility of Cold Mix Asphalt Concrete

2021 ◽  
Vol 27 (2) ◽  
pp. 59-72
Author(s):  
Zahraa Ahmed Samor ◽  
Saad Issa Sarsam
Keyword(s):  
Tensile Strength ◽  
Portland Cement ◽  
Asphalt Concrete ◽  
Ordinary Portland Cement ◽  
Asphalt Binder ◽  
Asphalt Mixture ◽  
Hydrated Lime ◽  
Technical Requirements ◽  
Concrete Mixtures ◽  
Age Related

Laboratory experience in Iraq with cold asphalt concrete mixtures is very limited. The design and use of cold mixed asphalt concrete had no technical requirements. In this study, two asphalt concrete mixtures used for the base course were prepared in the laboratory using conventional cold-mixing techniques to test cold asphalt mixture (CAM) against aging and moisture susceptibility. Cold asphalt mixtures specimens have been prepared in the lab with cutback and emulsion binders, different fillers, and curing times. Based on the Marshal test result, the cutback proportion was selected with the filler, also based on the Marshal test emulsion. The first mixture was medium setting cationic emulsion (MSCE) as a binder, hydrated lime, and ordinary portland cement as a filler (7.95% MSCE + 2%HL + 3% OPC). The second mixture used was medium curing cutback (MC-250) as a binder and ordinary portland cement as a filler (5.18% MC 250 + 5% OPC). The indirect tensile strength (ITS) of the samples was measured at 25 ° C. It was found that the cold mix with the MSCE binder had a high ITS value relative to the cold mix with the cutback asphalt binder (MC-250). The dry mixture of MSCE  ITS was approximately 3.77 times the dry mixture of MC-250. The MSCE wet mix was about 4.2 times the wet MC-250 mix. Tensile strength ratio result (TSR %) for the MSCE binder mix and the cutback MC-250 binder mix showed that the MSCE mix has a reasonable moisture resistance (77% ) compared to the MC-250 mix (69.2 %). The aging test and aging ratio result showed that asphalt binder oxidation has a significant effect on age-related pavement degradation as it changes the time-temperature relationship depending on the viscoelastic properties of the asphalt binder. The result clearly showed that the MSCE binder mix had a high resistance to aging (440 Kpa) compared to the cutback (MC-250) binder mix (110 Kpa). In contrast, the MSCE aging ratio (90 %) was higher than the MC-250 ratio (85 %).

scholarly journals PENELITIAN PENAMBAHAN BAHAN BATU PADAS PADA CAMPURAN ASPAL BETON

2019 ◽  
Vol 2 (1) ◽  
pp. 154
Author(s):  
Supriadi Supriadi ◽  
Yosef Cahyo ◽  
Ahmad Ridwan ◽  
Agata Iwan Candra
Keyword(s):  
Compressive Strength ◽  
Asphalt Concrete ◽  
Coarse Aggregate ◽  
Asphalt Binder ◽  
Strong Stability ◽  
Average Height ◽  
Optimum Level ◽  
Fine Aggregate ◽  
Concrete Mixtures ◽  
Technical Specifications

Asphalt Concrete (Hotmix) is a mixture of coarse aggregate, fine aggregate and filler (Filler) with asphalt binder in high temperature conditions with the composition studied and regulated by technical specifications. In this study, asphalt concrete mixtures were given materials additional padas. This addition was carried out to study and determine the effect of padas on the asphalt concrete mixture with the addition of 5%, 10%, and 15%. Compressive strength specimens in the form of cylinders with a diameter of 10.09 cm and an average height of 7.8 cm. Testing is done after 2 days. Asphalt with the addition of 5% padas is better able to produce a better value of stability than others. The addition of padas rock produced a strong stability of 5% at 888.0747 kg, 10% at 598,199 kg, 15% at 441,6391 kg. To reach the optimum level, the mixture on concrete asphalt ranges < 5%Aspal Beton (Hotmix) adalah campuran agregat kasar, agregat halus, dan bahan pengisi (Filler) dengan bahan pengikat aspal dalam kondisi suhu tinggi (panas) dengan komposisi yang diteliti dan diatur oleh spesifikasi teknis.. Pada penelitian ini, campuran aspal beton diberi bahan tambahan batu padas. Penambahan ini dilakukan untuk mempelajari dan mengetahui pengaruh batu padas pada campuran aspal beton dengan penambahan 5%, 10%, dan 15%. Benda uji kuat tekan berupa silinder dengan diameter 10,09 cm dan  tinggi rata rata 7,8 cm. Pengujian dilakukan setelah 2 hari. Aspal dengan  penambahan batu padas 5% lebih mampu menghasilkan  nilai stabilitas yang lebih baik dari pada yang lainya. Penambahan batu padas menghasilakan  kuat stabilitas masing masing yaitu 5% sebesar 888.0747 kg, 10% sebesar 598.199 kg, 15% sebesar 441.6391 kg. Untuk mencapai kadar optimum maka campuran padas pada aspal beton berkisar antara < 5%

scholarly journals Repair of road surfaces using cold wet fiber containing asphalt concrete mixtures

2020 ◽  
Vol 7 (2) ◽  
Author(s):  
Sergey Andronov ◽  
Andrey Kochetkov ◽  
Igor Shashkov
Keyword(s):  
Asphalt Concrete ◽  
Water Film ◽  
High Strength ◽  
Asphalt Mixtures ◽  
Crushed Stone ◽  
Regulatory Requirements ◽  
Good Adhesion ◽  
Concrete Mixtures ◽  
Road Surfaces ◽  
Mineral Powder

During the construction of experimental sections of road surfaces in v. Ust-Kurdyum of the Saratov district of the Saratov region has been established the efficiency of production and application of cold fiber-containing dispersed-reinforced asphalt concrete mixtures with dispersed bitumen. A method for accelerating the formation of the structure of cold fiber-containing asphalt concrete by heat treatment of its surface is studied. Dispersed bitumen after drying the water film has good adhesion to concrete, asphalt concrete and other materials. The asphalt concrete formed as a result of curing on the basis of dispersed bitumen is high-strength, chemical-resistant, hydrophobic and environmentally friendly, corresponding to the existing regulatory requirements for asphalt concrete. For the production of asphalt mixtures, mass-produced equipment is suitable using materials commonly used in hot asphalt concrete: crushed stone, sand, mineral powder and bitumen. Operations on drying and heating of crushed stone and sand are excluded from the technological process. Asphalt concrete mix does not stick to the surface of rubberized rollers of vibratory rollers, which allows compacting mixtures with a high content of mineral powder at any time. There are fewer cracks on the surface of the compacted layer than when using a smooth-rolling roller. The technology is recommended for extended use on roads and streets of localities, and highways with low traffic intensity.

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