scholarly journals Analisis Kebutuhan dan Biaya Alat Berat untuk Pekerjaan Pemadatan Lapisan Permukaan Street-Race Circuit Mandalika

2021 ◽  
pp. 1-8
Author(s):  
A. Fihani ◽  
Hasyim Hasyim ◽  
I.D.M.A. Karyawan
Keyword(s):  
Surface Layer ◽  
Asphalt Concrete ◽  
Road Surface ◽  
Pneumatic Tire ◽  
Total Cost ◽  
Air Compressor ◽  
The Road ◽  
Heavy Equipment ◽  
Dump Trucks ◽  
Base Course

The Street-Race Circuit is being built in the Mandalika Tourism Special Economic Zone (KEK), Central Lombok, West Nusa Tenggara. The construction is targeted to be completed, before the MotoGP event on this circuit is implemented in 2021. One of the infrastructure related to this, which also really needs to be built to support the smooth running of the 2021 MotoGP is the development of access to the circuit location. The analysis carried out includes the calculation of heavy equipment productivity. Heavy equipment productivity is determined based on cycle times, production per hour, number of heavy equipment used, the amount of operating costs per hour. The analysis was carried out for the road surface layer work, namely the Asphalt Concrete Base Course (AC-BC) work. Based on the results of the analysis, it was found that the production for 1 unit of asphalt mixing plant (AMP) was 49.80 tons/hour and 9 units of dump trucks were 2.34 tons/hour. The spreader using the asphalt finisher can spread 109.18 tons/hour. As for the compactor, which is 18.55 tons/hour for 2 units of tandem rollers and 27.47 tons/hour for 1 unit of pneumatic tire roller. Other equipment is 9.96 m2/hour for air compressor and 2.74 liter/hour for asphalt sprayer. Meanwhile, in the Asphalt Concrete Wearing Course (AC-WC) work, several tools have the same productivity as the AC-BC job, namely asphalt mixing plant, air compressor and asphalt sprayer. Meanwhile, 13 units of Dump Trucks amounted to 2,338 tons/hour, 1 unit of asphalt finisher of 72,787 tons/hour, 3 units of tandem rollers of 12,367 tons/hour, and 1 unit of pneumatic tire roller of 18.31 tons/hour. The total cost of using heavy equipment for road surface layer work is Rp. 4,967,657,344. The total cost based on the contract document is Rp. 5,042,082,622. So that there is a difference in costs of Rp. 74,425,278.

scholarly journals Investigation of the wear of asphalt concrete pavement taking into account the influence of temperature, moisture of the pavement and the presence of an aggressive environment

2021 ◽  
Vol 2 (92) ◽  
pp. 68
Author(s):  
Andrii Siedov ◽  
Olena Fomenko
Keyword(s):  
Asphalt Concrete ◽  
High Speed ◽  
Climatic Factors ◽  
Load Capacity ◽  
Weather Conditions ◽  
Road Surface ◽  
Winter Period ◽  
Influence Of Temperature ◽  
The Road ◽  
Industrial Enterprises

Abstract. The emergence of a large number of modern high-speed cars with improved dynamic characteristics and an increase in the share of cars, especially large load capacity, have significantly accelerated the destruction of asphalt roads. Plastic deformations, tracks and cracks are more and more often observed on asphalt concrete pavements of roads, their wear is accelerated. As a result, the transport and operational condition of roads deteriorates, the speed of traffic decreases, the cost of road transport increases, and increasing costs are required for road repairs. Thus, the conditions of traction of the wheels of the car with the road surface are influenced by the service life of the coating, traffic intensity, the amount of harmful emissions of industrial enterprises and climatic factors. At the same time uneven change of conditions of coupling in cross and longitudinal profiles of the highway comes to light. Analyzing the natural and climatic factors, we can establish that different weather conditions have different effects on the condition of the road surface. In summer, the condition of the surface is dry and clean, so the driving conditions are safe. Taking into account all the factors that lead to the destruction of the coating with the formation of residual deformations and irreversible changes, requires the study of wear of the coating surface. he wear of the coating largely depends on the friction force in the area of contact of the tire with the surface of the coating, the type of tires and the pressure in the tires. But the random nature of changes in the intensity and composition of traffic, seasons, temperature, humidity, rainfall affects the amount of wear over a period of operation of the road surface. The presence of water or solutions in the pores of the coating leads to the separation of mineral particles from the layer under the action of impact force from the wheels of vehicles. It is experimentally established that the wear of asphalt concrete in the dry and wet state increases with increasing temperature. One of the main types of damage to road surfaces is their premature wear under the influence of vehicle wheels, in combination with changing weather conditions. Analyzing the natural and climatic factors, we can establish that different weather conditions have different effects on the condition of the road surface. The article considers the influence of temperature, humidity and the presence of solutions of chloride anti-icing materials on the process of abrasion of asphalt pavement in the autumn-winter period. Occurrence of big differences of temperature and humidity accelerates processes of aging of materials from which layers are made, influencing their durability and wear resistance.

scholarly journals Determination of tangential properties of a single pneumatic tire in the vehicle braking mode of a vehicle

2021 ◽  
pp. 28-34
Author(s):  
Valeriy Klimenko ◽  
Denis Kapski ◽  
Dmytro Leontiev ◽  
Oleksandr Kuripka ◽  
Andrii Frolov
Keyword(s):  
Coefficient Of Friction ◽  
Simulation Modeling ◽  
Torsional Rigidity ◽  
Dynamic Change ◽  
Twist Angle ◽  
Road Surface ◽  
Pneumatic Tire ◽  
The Road ◽  
On The Road ◽  
Pneumatic Tires

Problem. In the event of circumstances that may cause a traffic accident (accident), drivers apply emergency braking, which usually leads to the blocking of car wheels and the formation on the road surface of track information from pneumatic tires. If automated brake force control systems are installed in the brake actuator of the vehicle, the tracking information from the pneumatic tires may be absent or weak, and the braking efficiency of the wheeled vehicle will depend on the angular deformation of the tire relative to the road surface, which in turn is limited. coupling properties in the contact spot "tire-road surface". Goal. The aim of the work is to improve the method of determining the angle of twist of the pneumatic tire of a single car wheel in the mode of its braking by taking into account the effects of the coefficient of friction-sliding on roads with high traction. Methodology the peculiarities of twisting the pneumatic tire of a car wheel with a single busbar in the mode of vehicle braking on roads with low and high coefficient of friction - sliding are considered. The analysis of the model of dynamic change of the tire twist angle depending on the sliding of the tire tread elements in the spot of contact with the road surface is performed, and the results of simulation modeling are obtained, which are confirmed by experimental experiments. Originality. An empirical dependence is proposed, which takes into account the nature of the decrease in the value of the angle of twist of the tire on roads with high traction properties. Practical value. The obtained results of simulation modeling according to the proposed dependence determine that the highest indicators of torsional rigidity of the pneumatic tire are reached at a tire pressure of 0.8 MPa and a vertical load on it of about 2.6 104 N.

scholarly journals The Preparation of the Quick-Drying Bitumen Emulsion for the Protection of the Road Surface Asphalt Concrete Layer

2016 ◽  
Vol 32 (6) ◽  
pp. 3129-3134 ◽  
Author(s):  
Victoria Ryabenko ◽  
Elena Chigorina ◽  
Anatoly Razinov ◽  
Yulia Ubaskina ◽  
Ivan Kovtun
Keyword(s):  
Asphalt Concrete ◽  
Road Surface ◽  
The Road ◽  
Bitumen Emulsion ◽  
Concrete Layer

Research on the Electrical Energy of Piezoelectric-Embedded Asphalt Mixture

2013 ◽  
Vol 303-306 ◽  
pp. 26-31 ◽  
Author(s):  
Ning Tang ◽  
Chang Jun Sun ◽  
Shao Xu Huang ◽  
Pan Pan ◽  
Shao Peng Wu
Keyword(s):  
Asphalt Concrete ◽  
Road Safety ◽  
Vibrational Energy ◽  
Piezoelectric Materials ◽  
Asphalt Mixture ◽  
Electrical Energy ◽  
Road Surface ◽  
The Road ◽  
Road Lighting ◽  
Road Performance

There is an important effect on road safety with no lighting facilities near the wild road. With the piezoelectric materials embedded in the asphalt concrete as the smart aggregates, the piezoelectric asphalt concrete transforms the vibrational energy of road surface into electrical energy, to supply the road lighting facilities or be stored up. In this study, the electrical energy of piezoelectric-embedded asphalt mixture by using UTM and wheel tester. The results show that PMnS-PZN-PZT ceramic doped with 0.45wt% Fe2O3 (4mm×8pieces) be embedded in the AC-10 asphalt concrete which can obtain well road performance and micropower electrical energy.

scholarly journals Ensuring adhesion between the asphalt-concrete road surface and rigid base at the roadbed design stage

2021 ◽  
Vol 3 (7 (111)) ◽  
pp. 84-92
Author(s):  
Yevhen Dorozhko ◽  
Angelika Batrakova ◽  
Vladislav Tymoshevskyi ◽  
Elina Zakharova
Keyword(s):  
Adhesion Strength ◽  
Asphalt Concrete ◽  
Road Surface ◽  
Design Stage ◽  
Rigid Base ◽  
Concrete Slabs ◽  
Strained State ◽  
Cement Concrete ◽  
The Road ◽  
Concrete Layer

Arranging asphalt-concrete layers on a rigid base in the form of cement-concrete slabs can significantly improve the transporting and operational performance of the road surface. Such a structural solution is appropriate in almost all countries of the world since cement-concrete slabs retain high strength for a long time. To prevent the rapid destruction of an asphalt-concrete road surface on a rigid base, it is necessary to ensure reliable adhesion between the layers' contacts and, at the design stage, to test the adhesion strength by estimation. This paper has substantiated a criterion of adhesion strength in the contact between an asphalt-concrete road surface and the rigid base. The calculation involves comparing the active tangent stresses in the contact between layers dependent on the effect of the vertical and horizontal components of the transport load with the magnitude of permissible tangent shear stresses in the contact of layers. The parameters for an estimation model have been established; the stressed-strained state of the roadbed structure has been simulated using a finite element method. When modeling the stressed-strained state and calculating based on the strength criterion, different vehicle traffic conditions have been considered, as well as the effect of temperature on the strength parameters of the asphalt-concrete layer and the tar layer. The conditions for vehicle movement, taken into consideration when designing, correspond to the conditions of movement along the road, along the curves in the plan and profiles, and notion conditions at car emergency braking. Practical recommendations have been compiled for assigning the minimum permissible thickness of an asphalt-concrete layer on a rigid base, which must be followed at the design stage due to the condition for ensuring reliable adhesion between the layers' contacts. The minimum permissible thickness ranges from 2 cm to 10 cm, depending on the conditions of movement, temperature, and the type of tar.

scholarly journals Simulation of stresses in asphalt-concrete pavement with frost heaving

2018 ◽  
Vol 216 ◽  
pp. 01011 ◽  
Author(s):  
Vladimir Churilin ◽  
Sergei Efimenko ◽  
Oleg Matvienko ◽  
Viktor Bazuev
Keyword(s):  
Asphalt Concrete ◽  
Concrete Pavement ◽  
Road Surface ◽  
Stress Fields ◽  
Winter Period ◽  
The Road ◽  
Software Product ◽  
Surface Section ◽  
Full Scale Tests ◽  
Asphalt Concrete Pavement

The article reviews the issue of the stress-strain state of the road surface in the winter period as a result of roadbed soil heaving. The main purpose of the work is to determine the stress fields in the asphalt-concrete pavement, which is necessary for designing of frost-resistant roadbeds in the areas with seasonal freezing of roadbed soils. The following research methods were used: theoretical, laboratory, field. With consideration of different properties of materials and geometric dimensions of the road surface section, stress fields in the asphalt-concrete pavement during freezing were obtained with the use of the software product. Comparison of theoretical studies with the results of experimental and full-scale tests showed that the forms of theoretical solutions describe the stress fields in the freezing asphalt-concrete pavement quite accurately.

scholarly journals Evaluation of the interaction of tyre tread with asphalt concrete coating depending on weather-climatic conditions

2021 ◽  
Vol 18 (4) ◽  
pp. 122-126
Author(s):  
I. S. Gladushevskiy ◽  
Keyword(s):  
Asphalt Concrete ◽  
Weather Conditions ◽  
Concrete Surface ◽  
Climatic Conditions ◽  
Road Surface ◽  
Coupling Coefficients ◽  
Internal Factors ◽  
The Road ◽  
Concrete Coating

The tyre tread coupling with the road surface depends on a number of both external and internal factors. The controllability of the vehicle depends on the interaction between two materials. The article considers various tyre tread characteristics, the values of the coupling coefficients are determined for the tyre tread of M1 category vehicles during operation on different road conditions. The interaction of a new and worn tyre tread with the road surface has been assessed with vehicles driving on the asphalt concrete surface, taking into account weather conditions.

scholarly journals Field assessment of low-temperature cracks and bearing capacity of selected road sections in North-Eastern Poland

2018 ◽  
Vol 2018 (11) ◽  
pp. 106-115
Author(s):  
Piotr Jaskula ◽  
Mariusz Jaczewski ◽  
Dawid Ryś ◽  
Marek Pszczoła
Keyword(s):  
Transfer Coefficient ◽  
Bearing Capacity ◽  
Asphalt Concrete ◽  
Load Transfer ◽  
Field Investigation ◽  
High Modulus ◽  
Thermal Cracks ◽  
The Road ◽  
North Eastern ◽  
Base Course

Article presents the comparison of performance of selected road sections in north-eastern Poland constructed under typical contract conditions, with the usage of High Modulus Asphalt Concrete and typical Asphalt concrete The field investigation comprised of the assessment of: the number of transverse thermal cracking, the bearing capacity and the load transfer coefficient around the thermal cracks. The FWD test confirmed lower deflections of the road sections constructed with base courses made of High Modulus Asphalt Concrete and presented two times higher values of the stiff ness modulus of those pavements. The load transfer coefficient for pavements constructed with base course made of High Modulus Asphalt Concrete indicated almost lack of load transfer around the thermal cracks. In was very surprising as the tested roads were quite new (2-7 years) and with high bearing capacity. The article was made on the basis of the paper presented on BESTInfra conference, which was held in Prague.

scholarly journals Analisis Produktivitas Alat Berat Pada Pekerjaan Timbunan

2018 ◽  
Vol 4 (1) ◽  
Author(s):  
Dian Febrianti ◽  
Zulyaden Zulyaden
Keyword(s):  
Phase Ii ◽  
Calculation Method ◽  
Dump Truck ◽  
Improvement Project ◽  
Ring Road ◽  
The Road ◽  
Class A ◽  
Heavy Equipment ◽  
Class B ◽  
Dump Trucks

Heavy equipment plays an important role in terms of speed and acceleration of work. The road improvement project of Suka Makmue Square - the eastern ring road of capital of phase II, funding from OTSUS budget of Nagan Raya Regency with project cost Rp.3.922.503.000, - road length 2475 m The work followed is preferred heap work, B-class aggregate foundation layers, class A aggregate foundation layers. This research uses heavy equipment dump trucks, motor graders, roller vibrators, water tanker trucks. The purpose of the research is to know the productivity of heavy equipment and to know the time needed by heavy equipment to complete the work. The method used is the calculation method manually using the formula productivity. Based on the calculation of productivity at occupation of accumulation using dump truck production per hour 32,4 m/hour, production per day 259.2 m/day with 11 days, 6 days class B class aggregate work, 4 days class A class aggregate work, motor grader production hourly 128,3 m /hour, production per day 1026,43 m3/day with time 3 day, 2 days class B class aggregate work, 1 day class A class aggregate work, vibrator roller production hourly 64,8 m3/hour, production per day 518,4 m3/day with time 6 days, 3 days class aggregate layer work B , 2 days class A class aggregate work, water tankers truck production per hour 16.2 m3/hour, production per day 129,6 m3/day with 21 days, 11 days class B aggregate work, 8 days class A class aggregate work  Keywords-productivity, heavy equipment, time of work.

scholarly journals Research of transport and operational state of a public highway on the example of Civil-Industrial streets in Kamenka

2019 ◽  
Vol 7 (4) ◽  
pp. 68-73
Author(s):  
Ol'ga Hryanina ◽  
Elena Saksonova ◽  
Dmitry Abaev
Keyword(s):  
Asphalt Concrete ◽  
Visual Inspection ◽  
Methodological Approach ◽  
Concrete Pavement ◽  
Road Surface ◽  
The Public ◽  
The Road ◽  
Second Stage ◽  
Surface Survey ◽  
Asphalt Concrete Pavement

The article uses a practical example to consider changes in the transport and operational state of the public highway and road surface, with the possibility of justifying and taking into account these changes in the design, operation and repair. The methodological approach of the road and road surface survey provides for the first stage of visual inspection of the road and identification of areas with visible defects of the existing roadbed and road surface. At the second stage, the asphalt roadbed was opened by pits in the most visible areas of damage in order to take samples of road clothing and subsequent analysis. Defects and causes of deformations of asphalt concrete pavement and existing roadbed were identified. Recommendations for eliminating the causes of deformations and strengthening the coating are given.

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