scholarly journals Study on Synthesis and Service Properties of Anticoagulant Ice Microcapsule Coating Material

2021 ◽  
Vol 2021 ◽  
pp. 1-11
Author(s):  
Rong Chang ◽  
Jie Wang ◽  
Yongchun Qin ◽  
Jian Xu ◽  
Wei Zeng ◽  
...  
Keyword(s):  
Salt Solution ◽  
Freezing Point ◽  
Road Surface ◽  
Phase System ◽  
Snow Melting ◽  
Destructive Effect ◽  
The Road ◽  
Ice Fog ◽  
The Stability ◽  
Emulsified Asphalt

The presence of ice and snow on a road surface in winter will reduce the traffic capacity of the road network, which can easily lead to traffic accidents. In this study, nonchlorine organic snow-melting salt was added to emulsified asphalt to prepare an anticoagulant ice fog seal. Considering the destructive effect of snow-melting salt on the stability of emulsified asphalt, polyvinyl alcohol was used as an encapsulation material to form a stable two-phase system by mixing snow-melting salt with emulsified asphalt. The zeta potential method was used to test the storage stability of the encapsulated salt solution. The results showed that the material and content of the encapsulation had a significant effect on the stability of the emulsified asphalt and the reduction in the freezing point of the encapsulated salt solution. PVA (1.5%) mixed with 24% sodium acetate was used to prepare an encapsulated salt emulsion, which was mixed with anionic emulsified asphalt and sprayed on the road surface. This significantly reduced the freezing point of road surface water. The recommended spraying dosage of the anticoagulant ice fog seal layer was 0.4 kg/m2, which could lower the freezing point by at least −8°C while simultaneously meeting the antislip performance condition. This was shown to be a preventive maintenance technology with both anticoagulant ice and maintenance effects.

scholarly journals DESTROYING EFFECTS OF TRUCK TIRES ON THE DESIGN OF ROADWEAR

2022 ◽  
Vol 1 (1) ◽  
pp. 63-71
Author(s):  
Vladimir Pryadkin ◽  
Artem Artemov ◽  
Pavel Kolyadin ◽  
A. Kolcov
Keyword(s):  
Mathematical Model ◽  
Road Surface ◽  
Destructive Effect ◽  
The Road ◽  
Truck Tires ◽  
Temperature State ◽  
On The Road ◽  
The Mathematical Model

The article presents a mathematical model of the destructive effect of a wide-profile tire on the roadway. The mathematical model makes it possible to adequately reproduce the effect of a wide-profile tire on the road surface, taking into account the load and parameters of the tire, as well as the structure of the road surface and the temperature state.

scholarly journals Lidar and ground penetrating radar data in determining road surface conditions and geological characteristics of unstable soils

2017 ◽  
Vol 2 (20) ◽  
pp. 111-129
Author(s):  
Artur Plichta ◽  
Adam Piasecki
Keyword(s):  
Ground Penetrating Radar ◽  
Load Capacity ◽  
Radar Data ◽  
Road Surface ◽  
The Road ◽  
Geological Characteristics ◽  
Laser Scanners ◽  
Road Projects ◽  
The Stability ◽  
Ground Penetrating

Within the road investments the very important element determining repeatedly the success of the whole project is an adequate information about the characteristics of the site, its load capacity, stability and the possible impact of geological characteristics that may interfere with subsequent service life, not only for the road surface itself, but also for the surrounded objects. The surface is incessantly influenced by geological characteristics, determining its durability and functional usefulness. The main aim of this paper is to answer the question how by the usage of modern technics for obtaining data it is possible to find a link confirming the characteristics of land on which the specific road projects are supposed to be carried out, or where these projects have already been accomplished, concerning their requirements with high accuracy of location and also the stability and durability of the ground. This article makes also an attempt to answer not only the question how to identify the construction of road surface, but also how to locate underground cavities, created or influenced by the flow of water, or due to geological structures characterized as an inconsistent ground. The results were supported with geophysical researches using GPR method, and also data collected with laser scanners.

scholarly journals INVESTIGATION INTO THE STABILITY OF DRIVING AN AUTOMOBILE ON THE ROAD PAVEMENT WITH RUTS

Transport ◽  
2009 ◽  
Vol 24 (2) ◽  
pp. 170-179 ◽  
Author(s):  
Vidmantas Vansauskas ◽  
Marijonas Bogdevičius
Keyword(s):  
Mathematical Model ◽  
Mathematical Simulation ◽  
Road Safety ◽  
Road Surface ◽  
First Line ◽  
The Road ◽  
Road Pavement ◽  
On The Road ◽  
The Stability

The article reviews the stability of an automobile on the road pavement with ruts. The problems of road safety depend on many factors. One of those is the quality of the road surface. Big heavy lorries deform the road surface causing ruts especially in the first line of the road. The article analyzes the influence of the geometry of ruts on the stability of the automobile. A mathematical model of a 3D automobile and the interaction between wheels and the road surface and the geometry of the road surface are presented. The mathematical criterion of the stability of the moving automobile on the road surface with ruts is laid down. The results of mathematical simulation and the criterion of the stability of the moving automobile (60 km/h) on the road surface depending on the depth of ruts are introduced.

scholarly journals Comparing the Performance of Two Road Weather Models in the Netherlands

2017 ◽  
Vol 32 (3) ◽  
pp. 991-1006 ◽  
Author(s):  
Virve Karsisto ◽  
Sander Tijm ◽  
Pertti Nurmi
Keyword(s):  
The Netherlands ◽  
Surface Temperature ◽  
Weather Forecasting ◽  
Freezing Point ◽  
Road Surface ◽  
The Road ◽  
Road Surface Temperature ◽  
Weather Model ◽  
The Difference ◽  
Comparable Quality

Abstract High-quality road condition forecasts are a prerequisite for road authorities to ensure wintertime road safety. Harsh winter conditions can cause problems for traffic not only in countries where snowy winters are common but also in regions where the temperature drops below the freezing point occasionally. This study reports on the evaluation of the Royal Netherlands Meteorological Institute’s (KNMI) new road weather forecasting model by comparing it with the Finnish Meteorological Institute’s (FMI) road weather model, both run for 321 Dutch road weather stations, four times daily (0300, 0900, 1500, and 2100 UTC) during the test period, 15 January–28 February 2015. Road surface temperature forecasts by both models were evaluated against observations. The KNMI model produced slightly more accurate forecasts than the FMI model. The main reason for the difference is probably due to the optimization of the physical properties of the KNMI model for the Netherlands, whereas the FMI model is designed for quite different Finnish wintertime meteorological conditions. However, in general the road surface temperature forecasts were of quite comparable quality.

Study on Soft Foundation Settlement Analysis and Treatment of Bridge-Head

2013 ◽  
Vol 779-780 ◽  
pp. 632-635 ◽  
Author(s):  
Hong Li Zhao ◽  
Zhen Jiang Hui ◽  
Jie Lin
Keyword(s):  
Effective Stress ◽  
Negative Pressure ◽  
Road Surface ◽  
Foundation Settlement ◽  
The Road ◽  
Soft Foundation ◽  
Road Performance ◽  
The Stability ◽  
Settlement Analysis

In recent years, the construction of roads and bridges in China has been made remarkable achievements; the construction quality and road performance have been greatly improved. But the soft foundation settlement processing still prevents the quality of driving from improving. The improper handling of soft foundation settlement would result in vehicle bump at bridge head, and cause damage to the road surface of the bridge and telescopic device. On the principle of effective stress of the soil, a method is used to accelerate the foundation settlement in the negative pressure zone, and it has effectively reduced the differential settlement of bridge-head which improves the stability of roadbed.

Snow melting on the road surface driven by a geothermal system in the severely cold region of China

2020 ◽  
Vol 40 ◽  
pp. 100781
Author(s):  
Wenke Zhao ◽  
Yaning Zhang ◽  
Lei Li ◽  
Wentao Su ◽  
Bingxi Li ◽  
...  
Keyword(s):  
Road Surface ◽  
Geothermal System ◽  
Cold Region ◽  
Snow Melting ◽  
The Road ◽  
On The Road

scholarly journals Mathematical modeling of improving the characteristics of bitumen for asphalt concrete by modifying

2021 ◽  
Vol 2131 (4) ◽  
pp. 042039
Author(s):  
G Provatorova ◽  
K Ryabinina
Keyword(s):  
Asphalt Concrete ◽  
Weather Conditions ◽  
Road Surface ◽  
Rutting Resistance ◽  
The Road ◽  
Concrete Mixtures ◽  
Additional Equipment ◽  
Materials Used ◽  
Modified Binder ◽  
The Stability

Abstract A significant increase in traffic intensity and increased axle loads of vehicles on the roads led to the fact that asphalt concrete is not able to provide the required durability of road surfaces. The durability of asphalt concrete pavements is directly related to the quality of the materials used, primarily bitumen. Bitumen is most susceptible to changes under the influence of traffic loads and weather conditions. At the same time, bitumen largely determines the condition of the road surface. The behavior of bitumen can be changed by modifying it with additives. The novelty of bitumen modification lies in the fact that the addition of polymer to bitumen makes it possible to obtain a road surface that is resistant to cracking at low temperatures and to provide fatigue strength at high temperatures. Rutting resistance is also achieved. An important role in the choice of the modifier is played by economic issues related to the rise in the cost of coating, as well as the need to use additional equipment, the stability of the modified binder during storage and transportation, etc. Carbon nanotubes (CNTs) were used as a modifier for asphalt concrete mixtures. During the experiment, a significant improvement in the main indicators of asphalt concrete mixtures was revealed, as well as the maximum permissible deviations for the amount of binder in the asphalt concrete mixture and for the main indicators were observed. Moreover, the most important thing that has been achieved is a significant increase in rutting resistance by rolling a loaded wheel.

scholarly journals MODELING THE IMPACT OF WIDE-PROFILE TRUCK TIRES ON THE ROAD SURFACE

2021 ◽  
Author(s):  
V.I. Pryadkin ◽  
◽  
K.A. Shavirin ◽  
A.Yu. Kolcov ◽  
◽  
...  
Keyword(s):  
Mathematical Model ◽  
Road Surface ◽  
Destructive Effect ◽  
The Road ◽  
Truck Tires ◽  
Temperature State ◽  
On The Road ◽  
The Impact ◽  
The Mathematical Model

The article presents a mathematical model of the destructive effect of a wide-profile tire on the roadway. The mathematical model makes it possible to adequately reproduce the effect of a wide-profile tire on the road surface, taking into account the load and parameters of the tire, as well as the structure of the road surface and the temperature state.

scholarly journals Improving the design of the subgrade in the construction of culverts

2019 ◽  
Vol 6 (4) ◽  
Author(s):  
Aleksey Kamenchukov ◽  
Andrey Lopashuk ◽  
Victor Lopashuk ◽  
Victor Svetenok ◽  
Ilya Ukrainskiy
Keyword(s):  
Mathematical Modeling ◽  
High Efficiency ◽  
Drainage System ◽  
Protective Layer ◽  
Field Studies ◽  
The Body ◽  
Road Surface ◽  
The Road ◽  
The Stability

The article considers the issues of assessing and improving the quality and reliability of culverts and the road drainage system on roads with unpaved and transitional types of pavement. The authors performed a number of field studies aimed at assessing the operational condition of culverts and pavement above them on roads of territorial significance in the Khabarovsk Territory. The issues of the influence of the quality of culverts on the condition of the road surface are examined in detail. Systematized and analyzed data on the influence of the presence (absence) of defects in the body of culverts on the quality of the road surface. The data are ranked by the diameter of the pipe hole and the size of the protective layer, and the degree of influence of the quality of the culvert on the quality of the road surface depending on the thickness of the protective layer is determined. The relationship between defects in culverts and the quality of the road surface is established. Based on the result of mathematical modeling, a nomogram of the dependence of the state of the coating over the culvert on the thickness of the backfill over the pipe and the condition of the culvert is constructed. In a specialized software package, by the finite element method, an assessment of the stress-strain state and structural stability of the subgrade with a culvert under the influence of the normative static load on the structure is carried out. The results of mathematical modeling showed that there is a significant decrease in the stability of the structure, especially with low embankments. To increase the stability and reduce the deformation of the structure, the authors proposed a method of strengthening the embankment of the subgrade in places of the device, which on the basis of mathematical modeling showed its high efficiency.

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