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.

scholarly journals Using Steel-Smelting Slag as a Raw Material Component in the Production of Asphalt Concrete

2020 ◽  
Vol 157 ◽  
pp. 06010
Author(s):  
Dmitry Kuznetsov ◽  
Marina Vysotskaya ◽  
Albert Burgonutdinov
Keyword(s):  
Asphalt Concrete ◽  
Raw Materials ◽  
Raw Material ◽  
Crushed Stone ◽  
Fatigue Properties ◽  
Initial Moment ◽  
Type B ◽  
Steel Smelting ◽  
Smelting Slag ◽  
Mineral Powder

The possibility of using polydisperse steel-smelting slag for the production of type B asphalt concrete is investigated, the possibility of its use as a mineral powder, crushing screening and crushed stone is considered. As a result of the study, it was found that a promising area for the use of slag raw materials in the technology for the preparation of asphalt mixes is: as a mineral powder - without additional processing steps; crushing screening - with the development of additional technological operations. The use of raw materials as crushed stone is impractical because of the high average density of the final asphalt mixture. Based on the test results, the characteristics of the fatigue properties of asphalt concrete from fine-grained dense mixtures of type B made on mineral powders from slag and limestone were obtained. It was established that at the initial moment, a large number of cycles to failure are characterized by compositions on slag powder, however, samples from this series tested after 45 days showed a significant rigidity increase and were destroyed earlier than similar samples on limestone. Obviously, this phenomenon is associated with an increase in the brittle properties of the material due to the formation of crystallization-condensation bonds in the structure of asphalt concrete containing slag.

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 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.

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.

IMPROVING THE QUALITY OF REPAIR OF NON-RIGID ROAD SURFACES WITH THE USE OF COLD ASPHALT CONCRETE MIXTURES

2021 ◽  
pp. 62-74
Author(s):  
А. Ф. Зубков ◽  
К. А. Андрианов ◽  
Б. Бехзоди
Keyword(s):  
Layer Thickness ◽  
Asphalt Concrete ◽  
High Quality ◽  
Repair Work ◽  
The Road ◽  
Concrete Mixtures ◽  
Factory Production ◽  
Air Temperatures ◽  
Road Surfaces

Постановка задачи. Необходимо рассмотреть технологию ремонта дорожных покрытий нежесткого типа с применением холодных асфальтобетонных смесей на битумах марок БНД, СГ и МГ. Требуется разработать математическую модель конструкции автомобильной дороги, позволяющую демонстрировать распределение температуры по толщине слоя покрытия в зависимости от конструктивных параметров дороги с учетом теплофизических свойств материалов и температурных условий её эксплуатации. Также надлежит уточнить влияние температуры смеси на предел прочности холодной смеси заводского производства. Следует провести ремонт выбоин покрытия в производственных условиях при пониженных температурах воздуха. Результаты. По результатам моделирования распределения температуры в слое покрытия доказано, что применение холодных асфальтобетонных смесей обеспечивает высокое качество ремонтных работ при температуре воздуха выше 30 °С. Получены данные о зависимости температуры нагрева основания от температуры воздуха и толщины слоя, которая обеспечивает температурные режимы холодной смеси при её уплотнении. Установлено, что предел прочности покрытия зависит от температуры. Максимальная величина предела прочности холодного асфальтобетона заводского производства обеспечивается при температуре уплотнения смеси 50-55 °С. Проведенный ремонт выбоин дорожного покрытия при пониженных температурах воздуха доказал возможность выполнения ремонтных работ с высоким качеством в данных производственных условиях. Выводы. Доказана эффективность нагрева основания выбоины перед укладкой холодной асфальтобетонной смеси при ремонте дорожных покрытий нежесткого типа со снижением температуры воздуха ниже 5 °С. Установлено влияние температуры основания покрытия на ее равномерное распределение в зависимости от температуры воздуха и толщины слоя покрытия при выполнении ремонтных работ. Полученные данные о зависимости предела прочности холодного асфальтобетона заводского производства от температуры воздуха позволяет определять параметры уплотняющих машин, обеспечивающих высокое качество ремонтных работ. Statement of the problem. It is essential to consider the technology of repair of road surfaces of non-rigid type using cold asphalt-concrete mixtures on bitumen grades BND, SG and MG. It is important to develop a mathematical model of the road structure that enables modeling the temperature distribution over the layer thickness, depending on the design parameters of the road considering the thermal and physical properties of materials and the temperature conditions of the road operation. It is also necessary to specify the effect of the mixture temperature on the tensile strength of the cold mixture of factory production. Potholes of the coating must be repaired at low air temperatures of different repair technologies in production conditions. Results. Based on the results of modeling the temperature distribution in the coating layer, it is proven that the use of cold asphalt-concrete mixtures ensures high quality of repair work at air temperatures above +30 ° C. The dependence of the heating temperature of the base on the air temperature and the layer thickness is obtained, which provides the temperature conditions of the cold mixture during compaction. It is established that the ultimate strength depends on temperature. The maximum value of the strength limit of cold asphalt concrete of factory production is provided at the compaction temperature of the mixture at +50-55⁰C. The repair of potholes of the road surface carried out in production conditions at low air temperatures proved the ability to perform repair work with high quality of work. Conclusions. It is proven that it is effective to heat the base of the pothole during repair on non-rigid road surfaces at low air temperatures before laying a cold asphalt-concrete mixture. The influence of the base temperature on its distribution over the layer thickness depending on the air temperature and the layer thickness during repair work is established. The obtained dependence of the strength limit of cold asphalt concrete of factory production on temperature allows us to determine the parameters of compacting machines that ensure high quality of repair work.

Research of Road Application Performances of Asphalt Mixtures with Active Mineral Powder

2014 ◽  
Vol 599 ◽  
pp. 218-223
Author(s):  
Peng Cheng Yue ◽  
Pan Fei Liu ◽  
Jian Zhon Dong ◽  
Ping Ping Ding
Keyword(s):  
Dynamic Stability ◽  
Asphalt Concrete ◽  
Moisture Damage ◽  
Asphalt Mixtures ◽  
Test Machine ◽  
Splitting Test ◽  
Marshall Test ◽  
Mineral Powder ◽  
Failure Life ◽  
Marshall Stability

In this paper the effect of Active mineral powder (AMP) on the fundamental behavior of asphalt concrete especially in moisture damage was studied. Polycyclic Soaking Marshall test and freeze-thaw and splitting test were used to investigate the resistance of mixtures to moisture damage. Dynamic stability of mixture was evaluated by soaking rutting and the fatigue life of asphalts mixture with and without AMP was measured by universal test machine (UTM). After adding AMP, Retained Marshall Stability, Tensile Strength Ratio and dynamic stability value of asphalt concrete is higher than that of non-containing AMP asphalt concrete. The failure life of asphalt concrete increased as adding AMP. The results showed that the addition of AMP could improve the performance of failure life and resistance to moisture damage.

scholarly journals Asphalt concrete mixtures with addition of reclaimed asphalt pavements

2021 ◽  
Author(s):  
Piotr Zieliński
Keyword(s):  
Tensile Strength ◽  
Asphalt Concrete ◽  
Asphalt Mixtures ◽  
Indirect Tensile Strength ◽  
Asphalt Pavements ◽  
Stiffness Modulus ◽  
Reclaimed Asphalt ◽  
Concrete Mixtures ◽  
Indirect Tensile ◽  
Reclaimed Asphalt Pavements

The effect of using reclaimed asphalt pavements (RAP) to asphalt concrete mixtures besides their utilization is to reduce the amount of the new bituminous binder and aggregate added to hot mix asphalt. This publication presents studies on asphalt mixtures with an increased up to 40% amount of RAP additive with the simultaneous use of 2 types of added bitumen, i.e. 35/50 and PMB 25/55-60. The aim of the paper is the evaluation of the basic mixture properties in a wide range of operating temperatures, as a part of the AC testing at high temperatures, the resistance to rutting at 60° C and indirect tensile strength at 40° C. The assessment of properties at intermediate operating temperatures is based on indirect tensile tests, including: elastic stiffness modulus at 5° C, 15° C and 30° C and static strength at 25° C. The low temperature properties have been tested in water and frost resistance tests by indirect tensile strength ratio. The results of the study were subjected to the analysis of the statistical significance of differences, which showed an improvement in the resistance of AC with the addition of RAP to the formation of permanent deformations and an increase in the stiffness modulus as well as indirect tensile strength. There was no adverse effect of the RAP additive on asphalt mixtures resistance to water and frost action.

scholarly journals Application of Mining Waste Powder as filler in Hot Mix Asphalt

2019 ◽  
Vol 274 ◽  
pp. 04002 ◽  
Author(s):  
Sangiorgi Cesare ◽  
Tataranni Piergiorgio ◽  
Lantieri Claudio ◽  
Mazzotta Francesco
Keyword(s):  
Asphalt Concrete ◽  
Hot Mix Asphalt ◽  
Physical And Mechanical Properties ◽  
Extraction Process ◽  
Mining Waste ◽  
Asphalt Mixtures ◽  
Limestone Filler ◽  
Concrete Mixtures ◽  
Laboratory Characterization ◽  
Main Components

Asphalt concrete mixtures are composed of two main components: aggregates and binder. The fraction of aggregates passing through the 63μm sieve is traditionally considered as filler. During years, several researches have shown the importance and the influence of filler in controlling the physical and mechanical properties of Hot Mix Asphalts (HMAs). The main objective of this research is to investigate and to assess the effects given by the use of Mining Waste Powder (MWP) within HMAs in total substitution of traditional limestone filler. The MWP used in this study is a residual of the tungsten extraction process in Panasqueira (Portugal) mine. The evaluation of properties conferred by the presence of the MWP filler within asphalt mixtures is based on a physical and mechanical laboratory characterization. For this purpose, tests have been performed both on bituminous mastics and on HMAs. Results indicate that the use of MWP in total substitution of limestone filler does not negatively affect the performances of HMAs and their bituminous mastics.

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.

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