СRUSHED STONE MATERIALS AND GRAVEL MATERIALS BOUND BY MINERAL BINDERS. STANDARDIZATION

2021 ◽  
Vol 2021 (24) ◽  
pp. 28-39
Author(s):  
Anatolii Tsynka ◽  
◽  
Sergey Illyasch ◽  
Tetyana Tereshchenko ◽  
◽  
...  
Keyword(s):  
National Standard ◽  
Crushed Stone ◽  
Subsequent Work ◽  
Normative Documents ◽  
The Road ◽  
Road Pavement ◽  
Stone Materials ◽  
Granular Mixtures ◽  
Road Materials ◽  
On The Road

Introduction. This paper presents the results of the standardization of requirements for granular mixtures bound by mineral binders for bases, sub-bases and top layers of road pavements used as framework for national standard «Crushed stone materials and gravel materials for the road building industry — Specifications. Part 3: The materials bound by mineral binders». Standardization. The standard covers the requirements for crushed stone-sand and sand-gravel mixtures treated with mineral binders and derived from them hardened materials as well as the requirements for source constituents. Mineral binder for the standardized type of road materials shall be selected from following main constituents: cement, slag or fly ash each separately or combinations thereof using an activator if required. Standard mixtures shall be produced in a factory or mixed in situ on the road surface. Clauses of the standard also comprise the requirements for mixtures and related hardened materials from active slag or ash-slag materials which can act as the main constituent of the mixture (aggregate) and part of the binder. Standardized mandatory characteristics include mixtures physical properties comprising grading envelopes, and mechanical properties; the obligatory sections of the standard include requirements on quality control, transporting and marking of mixtures. Conclusions. Conclusions outline main results of standardization in view of the ongoing works on processing the related European Norms as national normative documents. It is emphasized that the developed standard supplements the fundamental requirements of adapted European normative documents regarding the composition and properties of said mixtures, particularly the requirements on frost resistance. The subsequent work shall be aimed at the adaptation of national regulations on road pavement design and construction to implement the newly standardized requirements for hydraulically bound mixtures.

A NEW APPROACH TO REPAIR OF NON-RIGID ROAD PAVEMENT TRANSITIONAL TYPE

2020 ◽  
Vol 264 (4) ◽  
pp. 47-51
Author(s):  
Serhii Holovko ◽  
Keyword(s):  
Crushed Stone ◽  
Significant Heterogeneity ◽  
Fine Aggregate ◽  
The Road ◽  
Subgrade Soils ◽  
Soil Mixing ◽  
Road Pavement ◽  
Local Roads ◽  
On The Road ◽  
Over Time

Earlier, due to insufficient financing of the road industry, funds were allocated on a leftover basis for the repair of local roads, over time the condition of these roads has deteriorated significantly. So, given the ramified network of local roads, the issue of restoring the condition of local roads is a very urgent problem. Conducted exploratory studies of the application of stabilization technology to restore the condition of local roads show that this technology is progressive, since it allows reusing existing materials while ensuring the required strength of the pavement. However, design engineers rarely use this technology, probably due to insufficient research on this approach. The task is to investigate the possibility of using stabilization technology with the use of crushed stone layers of different composition and their maximum reuse, when repairing transitional pavements. Analysis shows that there are many cases where transitional structures have significant heterogeneity and low strength. This is formed due to a weak crushed stone base and waterlogging of the subgrade soils. Over time, soil particles penetrate into the crushed stone layer and weaken the contacts between the crushed stones, as a result of which rut, pits and subsidence form on the road, which significantly complicates the movement of vehicles. Studies of the composition of existing bases show that if in a dispersed system the amount of crushed stone grains is more than 50% by volume, then a contact frame is formed in the material. Intergranular voids are filled with soil or fine aggregate, processing with such a small amount of a mineral binder (cement or lime) allows it to be significantly strengthened, as well as to create bonds between the soil and crushed stone. Modern self-propelled soil mixing machines (recycler-stabilizer) allow in one pass to perform milling (loosening) and mixing of materials of existing transitional pavement to a depth of 40 cm. Taking into account the dependence of the distribution of normal stress in a two-layer half-space, it can be seen that stabilization of the foundation to a depth of 40 cm will allow the subgrade soil to work without exceeding the permissible shear deformations. The construction of the experimental site in Berezivka, Odessa region, confirmed the assumptions about the effectiveness of the proposed solution to restore the strength of transitional pavement. Keywords: non-rigid pavement of transition type, modulus of elasticity, stabilization, rubble, soil, cold recycling.

scholarly journals The Limestone as a Materials Combination of Base Course on the Road Pavement

2021 ◽  
Vol 1125 (1) ◽  
pp. 012019
Author(s):  
Yosef Cahyo Setianto Poernomo ◽  
Sigit Winarto ◽  
Zendy Bima Mahardana ◽  
Dwifi Aprillia Karisma ◽  
Rekso Ajiono
Keyword(s):  
The Road ◽  
Road Pavement ◽  
Base Course ◽  
On The Road

Use of soils and recycled industrial products treated with water glass in the road pavement base courses

2021 ◽  
Vol 2021 ◽  
pp. 86-93
Author(s):  
Anatolii Mudrychenko ◽  
◽  
Andrii Hrinchuk ◽  
Ivan Balashov ◽  
Sergey Illyasch ◽  
...  
Keyword(s):  
Blast Furnace ◽  
Sodium Silicate ◽  
Water Glass ◽  
Water Solution ◽  
Road Construction ◽  
The Road ◽  
Road Pavement ◽  
Stone Materials ◽  
Pavement Base ◽  
Local Materials

Introduction. Growing volumes of road construction increase the need to expand and rationally use of raw materials. The need for stone materials can be solved through the wide spread using of local materials, recycled products of industry in the pavement base courses and decreasing the use of natural construction materials by replacing them with alternatives, including soils, slag materials that are metallurgical industry wastes. Experience of ferrous metallurgy slag usage has been accumulated in the road industry of Ukraine. Their usage makes it possible to extend the construction season, increases the strength and reliability of road structures due to their physical and mechanical properties, significantly reduces the road pavement energy consumption, simplifying the technology of works and the estimated cost of road construction. It was determined that the layers of pavement made from blast furnace slag have a high bearing capacity. Slag structures in 5–10 years of hardening are not inferior to, and in 10–20 years surpass cement structures on durability and deformation resistance. However, there is an urgent need to provide strength and open road traffic on the already built road section in a shortest possible term, so there is a need to accelerate the activation of the slow-setting binder. Therefore water glass (water solution of sodium silicate) is used.Purpose. The purpose of the work is to study the feasibility of using the soils and recycled industry products treated with water glass in the road pavement base courses.Materials and methods. Experimental tests of soils and blast furnace slags treated with water glass with different content of water solution of sodium silicate were performed.Results. The feasibility of using the asphalt concrete mixtures on the basis of soils and recycled products of industry treated with water glass in the pavement base courses is determined. Recommendations regarding technological parameters of preparation, transportation, laying and compaction of such mixes are given.Conclusions. Performed studies have shown that the physical and mechanical parameters of soils and blast furnace slags treated with water glass meet the requirements of current regulations of Ukraine. The advantages of use are noted, namely: the possibility of replacement of traditional stone materials by the local materials and recycled products of industry, reducing the transport component in the cost of construction. The obtained results indicate the feasibility of using the soils and recycled products of industry treated with water glass in the road construction.Keywords: soils, recycled products of industry, graded blast furnace slag, water solution of sodium silicate, water glass

scholarly journals Thermal Analysis of Asphalt Concrete Pavements Heated with Amorphous Metal Technology

2018 ◽  
Vol 2018 ◽  
pp. 1-8 ◽  
Author(s):  
Cesare Sangiorgi ◽  
Cecilia Settimi ◽  
Piergiorgio Tataranni ◽  
Claudio Lantieri ◽  
Solomon Adomako
Keyword(s):  
Amorphous Material ◽  
Concrete Pavements ◽  
Road Maintenance ◽  
Warm Up ◽  
Physical Methods ◽  
The Road ◽  
Road Pavement ◽  
Heating Device ◽  
Critical Issues ◽  
On The Road

Undoubtedly, the most commonly used method for road maintenance includes the use of winter service vehicles to clear thoroughfares of snow and the spraying of chemicals to prevent ice formation on the road surface. The application of these traditional methods on road and airport pavements possesses numerous environmental, organizational, and technical challenges. To overcome these critical issues, new nontraditional technologies that act within the pavement, thereby increasing its temperature, have been developed. In relation to the heat source used, these are classified into chemical and physical methods. The purpose of this research is to study the temperature variation under the thermal transient process produced by the action of the physically heating device installed in the road pavement. The heating device is a ribbon, made of amorphous material, which is able to produce heat to warm up the pavement and its surface. Based on its principle of operation, it is classified among the nontraditional physical methods for the treatment of snow and ice. In this work, the performance of the heating ribbons on an experimental site at the G. Marconi International Airport in Bologna (Italy) is presented.

scholarly journals DETERMINATION OF MOST SIGNIFICANT FACTORS FOR ANALYSIS OF HIGHWAY OPERATING CONDITIONS

2017 ◽  
Vol 16 (6) ◽  
pp. 493-497
Author(s):  
M. G. Solodkaya
Keyword(s):  
Real Life ◽  
Operating Conditions ◽  
Dynamic Loads ◽  
Vehicle Speed ◽  
Vehicle Dynamic ◽  
The Road ◽  
Road Pavement ◽  
On The Road ◽  
Significant Factors ◽  
Road System

Traffic circulation on highways is a random process. Therefore automotive damage rate and, respectively, roads on which they are moving is subjected to regularities of random processes. Dynamic processes of vehicle-road interaction are determined to various extents by a host of factors that include road pavement evenness and characteristics of moving vehicles. For this reason the following task has been set: to reveal the most significant factors and mathematically correlate values of vehicle dynamic loads with a quality of road pavement and vehicle speed. Such task statement has not been solved adequately and this situation determines importance and novelty of the investigations in the given direction. While solving the mentioned task the investigations which have been carried out under real-life conditions and with the help of real-life objects are considered as the most reliable ones. However, preparation and execution of such experiments as needed significantly complicates their implementation. In this regard it looks rather expediential to combine a factorial experiment with the tests of a checked model while using ECM with stage-by-stage parameter fixation of working processes passing in “vehicle-road” system, comprehensive assessment pertaining to influence of the selected factors and selection of their optimum combination. Mathematical dependence has been obtained to evaluate influence of several external factors on optimization of vehicle dynamic load on the road. This component makes it possible to attain a simplified and adequate description of element interaction in “vehicle – road” system. While investigating influence of pavement irregularities on maximum dynamic loads on the road influence rate of the selected factors is determined in the following sequence: vehicle weight, pavement evenness and speed of transport facility.

scholarly journals Automatic Crack Detection of Road Pavement Based on Aerial UAV Imagery

2019 ◽  
Author(s):  
Farzaneh Dadrasjavan ◽  
Nima Zarrinpanjeh ◽  
Azam Ameri
Keyword(s):  
Crack Detection ◽  
The Road ◽  
Remotely Sensed Imagery ◽  
Road Pavement ◽  
Road Surface Monitoring ◽  
Surface Monitoring ◽  
Key Frames ◽  
On The Road ◽  
Edge Based ◽  
Complicated Task

Road surface monitoring more specifically crack detection on the surface of the road pavement is a complicated task which is found vital due to critical nature of roads as elements of transportation infrastructure. Cracks on the road pavement is detectable using remotely sensed imagery or car mounted platforms. UAV’s are also considered as useful tools for acquiring reliable information about the pavement of the road. In This paper, an automatic method for crack detection on the road pavement is proposed using acquired videos from UAV platform. Selecting key frames and generating Ortho-image, violating non road regions in the scene are removed. Then through an edge based approach hypothesis crack elements are extracted. Afterwards, through SVM based classification true cracks are detected. Developing the proposed method, the generated results show 75% accuracy in crack detection while less than 10% of cracks are omitted.

scholarly journals Analysis Traffic Volume of Rigid Pavement Damage on Roads Badami Karawang

2020 ◽  
Vol 2 (2) ◽  
pp. 190-199
Author(s):  
Lutfi Abiansyah ◽  
Andri Irfan Rifai
Keyword(s):  
Social Relations ◽  
Hypothesis Test ◽  
Public Works ◽  
Motor Vehicles ◽  
Rigid Pavement ◽  
Simultaneous Effect ◽  
The Road ◽  
Road Pavement ◽  
Additional Layer ◽  
On The Road

The road was a means of land transport is very important to the social relations and economic goods and services, and with a population that is increasing in every year to year, increasing the number of vehicles passing on the road that there is, therefore, in need planning a safe way according to the function, volume, and nature of traffic. Road repairs cost a lot and this action is felt not quite right because remedies can not survive by age plans and in kutif of IDN Times in 2019 that the condition damages the highway in the district of Karawang based on data from the Department of Public Works and Spatial Planning (PUPR) Khanewal district, along with the road status 1937.53 kilometers of district roads in poor condition. (IDN Times, 2019). This study was conducted to assess how much influence the volume of vehicles to the damage occurred on roads Badami karawang at STA 0 + 000-0 + 500 and STA 2 + 250-2 + ​​750, to examine the above problems by analyzing data from LHR and road damage the method of Highways, then further by looking at the correlation between the volume of vehicles on the road destruction by using SPSS and to increase the strength of rigid pavement using cement concrete road pavement planning 2003 is an additional layer (overlay) using the rigid pavement. From the analysis and discussion get Simultaneous Effect Hypothesis Test results that the Sig. (0,000) <α (0.05) and f count (35.671)> F table (3.89) H0 is rejected. It can be concluded that the simultaneous effect of the Light Vehicle Road damage of 33.8%, the simultaneous effect of the Heavy Vehicle Road damage amounted to 47.7%, Motorcycles simultaneous effect on road damage by 12.1% and the simultaneous effect of Motor Vehicles not to road damage by 14.2%, the result of the identification of the type and class of road damage indicates that the need for administration of additional layer (overlay) as a treatment for damage to roads, based on the analysis of the design used road repair method with a design life of 10 years, namely: (Overlay) Rigid Pavement (Rigid Pavement) as thick as 18 cm .and of analysts earn fees at cost (overlay) Rigid Pavement (Rigid Pavement) Rp. 9,114,626,20 / segments.

scholarly journals Road improvement from flexible pavement to rigid on Munjul - Panimbang Road Banten

2019 ◽  
Vol 270 ◽  
pp. 03007
Author(s):  
Telly Rosdiyani ◽  
Gunawan Noor ◽  
Irja Iswan
Keyword(s):  
Regional Development ◽  
Secondary Data ◽  
Concrete Pavement ◽  
Public Welfare ◽  
Primary Data ◽  
The Road ◽  
Road Pavement ◽  
Concrete Plate ◽  
Road Section ◽  
On The Road

Roads are an important element in promoting public welfare. With the approach of regional development, the achievement of balance and equitable regional development. Munjul-Panimbang Road Section, a crossroads of tourist access and liaison between villages and sub-districts, this certainly requires an increase in roads in facilitating transportation mobility. Improving the pavement structure that has been declining is one of the solutions that must be done immediately by replacing the pavement flexure structure into concrete pavement (Rigit Pavement). This project has been completed, thereby analyzing the suitability of the Concrete Pavement Road Pavement Planning. This road improvement uses the Concrete Pavement Concatenated Pavement (BBDT) type, stretching the thickness of concrete plate and the required reinforcement diameter. The research method based on Concrete Pavement Concrete Pavement Planning, Pd T-14 2003. Primary data and secondary data are needed as supporting in research. The result of the analysis shows that concrete pavement planning is 15 cm thick concrete plaster and perforated reinforcement per meter using 5D15 mm - 200 mm, while crosslinks per meter of 2D10 mm - 500 mm can withstand the burden of vehicles traveling on the road with the age of 20 years.

Study on the Physicochemical Characteristics and Dust Suppression Performance of New Type Chemical Dust Suppressant for Copper Mine Pavement

2021 ◽  
Author(s):  
Zhian Huang ◽  
Yang Huang ◽  
Zhijun Yang ◽  
Jun Zhang ◽  
Yinghua Zhang ◽  
...  
Keyword(s):  
Road Dust ◽  
Physicochemical Characteristics ◽  
National Standard ◽  
Open Pit ◽  
Dust Suppression ◽  
Suppression Effect ◽  
The Road ◽  
New Type ◽  
On The Road ◽  
Physical And Chemical

Abstract Mine road dust is an important source of dust in mine operations. The dust produced on the road surface is a great hazard to the workers. Aiming at the road dust of an open-pit mine, this paper conducts physical and chemical analysis of a dust suppressant prepared by using sodium polyacrylate as a binder, sodium carbonate as a moisture absorbent, polyethylene glycol as a water-retaining agent, and alkyl glycoside as a surfactant. Characterization of characteristics and dust suppression performance. The results show that the dust suppressant has a pH of 11.03, a viscosity of 18.5 mPa·s, and a surface tension of 28.1 mN/m. The content of heavy metal ions contained is less than the maximum concentration defined by the national standard. Under the same temperature condition, the greater the humidity, the stronger the hygroscopicity, especially when the humidity is 30%, where the better hygroscopic effect than water is obvious. The dust suppressant also has good anti-evaporation properties and it keeps at 4–5% moisture content after 10 days at a normal temperature. Compared with water, the dust suppressant has better resistance to wind erosion and compression. Under the same conditions, the loss rate of water is 2 times that of the dust suppressant and the pressure of the dust suppressant sample is about 3 times that of water. The dust suppressant has a much higher dust removal efficiency for all dust and respirable dust than water under the same conditions. Finally, the test results and mechanism of the dust suppression effect of the dust suppressant are described and analyzed, which shows that the dust suppressant studied in this paper has good performance and is suitable for road dust prevention.

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