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.

Constitutive Modeling of Asphalt Bound Granular Materials: Theoretical Background

2002 ◽  
Author(s):  
J. Murali Krishnan ◽  
K. R. Rajagopal
Keyword(s):  
Creep Test ◽  
Asphalt Concrete ◽  
Constitutive Modeling ◽  
Hot Mix Asphalt ◽  
Constitutive Models ◽  
Companion Paper ◽  
Theoretical Background ◽  
Asphalt Mixtures ◽  
Unified Approach ◽  
Multiple Natural Configurations

Different kinds of hot mix asphalt mixtures are used in highway and runway constructions. Each of these mixtures cater to specific needs and differ from each other in the type and percentage of aggregates and asphalt used, and their response can be markedly different. Constitutive models used in the literature do not differentiate between these different kinds of mixtures and use models which treat them as if they are one and the same. In this study, we propose constitutive models for two different kinds of hot mix asphalt, viz., asphalt concrete and sand asphalt. We use a framework for materials that possess multiple natural configurations for deriving the constitutive equations. While asphalt concrete is modeled as a two constituent mixture, sand asphalt is modeled as a single constituent mixture due to the peculiarity in its makeup. In this study, we present a unified approach for deriving models for these different kind of mixtures. In a companion paper, we compare the predictions of the model for a compressive creep test with available experimental results.

Evaluation of the Variability of |E*| with Field Procured Hot Mix Asphalt Concrete Mixtures

2010 ◽  
Vol 11 (3) ◽  
pp. 559-582 ◽  
Author(s):  
Christopher J. Robinette ◽  
Tamer M. Breakah ◽  
R. Christopher Williams ◽  
Jason P. Bausano
Keyword(s):  
Asphalt Concrete ◽  
Hot Mix Asphalt ◽  
Concrete Mixtures

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.

scholarly journals STUDY OF COMPOSITE TECHNOLOGIES GLASS FIBER BASALT ASPHALT MIXTURES TAKING INTO ACCOUNT THE INFLUENCE OF TEMPERATURE REGIME

2016 ◽  
Vol 2 (1) ◽  
pp. 134-137
Author(s):  
Андронов ◽  
Sergey Andronov
Keyword(s):  
Mechanical Properties ◽  
Glass Fiber ◽  
Uniform Distribution ◽  
Temperature Regime ◽  
Asphalt Concrete ◽  
Physical And Mechanical Properties ◽  
Structural Member ◽  
Asphalt Mixtures ◽  
Basalt Fibers ◽  
Influence Of Temperature

Asphalt concrete exposed to cracking, flaking, chipping, formation of ruts, waves and troughs. Introduction into a mixture of small size (discrete) components allows achieving their uniform distribution (dispersion) in the mixture and obtain a "composite" material having a high physical and mechanical properties in the finished structural member. Studied technology of composite dispersion-reinforced with basalt fibers asphalt mixtures, taking into account the influence of temperature.

Viscoelastic Properties of Field-Aged Cores

2013 ◽  
Vol 723 ◽  
pp. 551-556
Author(s):  
Ling Meng
Keyword(s):  
Asphalt Concrete ◽  
Viscoelastic Properties ◽  
Hot Mix Asphalt ◽  
Asphalt Mixture ◽  
Warm Mix Asphalt ◽  
Tension Test ◽  
Asphalt Mixtures ◽  
Direct Tension ◽  
Direct Tension Test ◽  
Aged Asphalt

Nowadays, engineers begin to pay more attention on field-aged asphalt concrete cores because they have more reality than the lab-made cores and the results can tell what happened to the pavement. However, it is not accurate to estimate the full asphalt mixture because as usual the pavement engineers can only extract the binder from it, not the mixture. Now there is a newly developed way to analysis the data more accurately using the Direct Tension Test. Because the field aged asphalt mixtures are not aged uniformly with the pavement depth because of various reasons, there is a modulus gradient going through deeply through the asphalt layer and usually the stiffest layer is the surface because normally the surface is more aged. A method has been developed to analysis this behavior. Tests are both taken on field cores which are Hot Mix Asphalt (HMA) and Warm Mix Asphalt (WMA). During the research, the authors found that it is both applicable for all the field cores. More information about this method and tests are detailed in the following paragraphs.

scholarly journals DESIGN AND CALCULATION OF ROAD SURFACE BY METHOD OF STRUCTURAL NUMBERS

2020 ◽  
pp. 25-30
Author(s):  
N. Gorshkova ◽  
D. Aleksandrov
Keyword(s):  
Construction Materials ◽  
Physical And Mechanical Properties ◽  
Road Construction ◽  
Ease Of Use ◽  
Road Surface ◽  
Simple Method ◽  
Concrete Mixtures ◽  
Road Surfaces ◽  
Complex Engineering ◽  
Main Components

Road surface is one of the main components of highways, its condition ensures the safety and speed of traffic. Modern road surface is a complex engineering structure: it consists of layers of road construction materials laid in stages, which have various physical and mechanical properties. These properties are taken into account to ensure the safe movement of vehicles at any time of the year at the estimated speed, while preventing accidents and reducing traffic convenience. The method of structural numbers is one of the methods for calculating roadways. The possibility of its application for the design and calculation of road surface is analyzed. The article shows the possibility of using this rather simple method used in many countries, using a specific example. Since Russia is actively switching to the design of asphalt-concrete mixtures using the Superpave method, which improves the performance of road surfaces, this method has advantages in the design and calculation of road coverings, consisting in ease of use.

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 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 Effect of polymer and functional additives on the properties of bitumen and asphalt-concrete

2020 ◽  
Vol 1 (11-12) ◽  
pp. 47-49
Author(s):  
N. P. Kotenko ◽  
Yu. S. Shcherba ◽  
A. S. Evforitskiy
Keyword(s):  
Mechanical Properties ◽  
Carbon Nanotubes ◽  
Asphalt Concrete ◽  
Warm Season ◽  
Physical And Mechanical Properties ◽  
Polymeric Materials ◽  
Repair Work ◽  
Concrete Mixtures ◽  
Functional Additives ◽  
Functional Additive

The possibility of modifying the oil road bitumen of the BND 70/100 grade is investigated; it belongs to the category of viscous bitumen and is used for road works in the warm season, with an average daily temperature not lower than +5°C. The material is widely used for repair work, and for laying new roads. Copolymers of styrene with butadiene and ethylene with vinyl acetate were used as polymeric materials for polymer-bitumen binders (PBV). Their optimal concentrations were determined for obtaining PBV with increased heat resistance and elasticity. Carbon nanotubes were used as a functional additive to bitumen.. The physical and mechanical properties of modifi ed bitumen and asphalt concrete mixtures based on them are given. It was shown that the introduction of even a small amount of nanotubes into asphalt concrete leads to an increased shear stability and strength at diff erent temperatures from 0 to 50°C.

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