scholarly journals Motivational Bonus-System Based On Pavement Installation Temperatures Measurement By Thermographic System (TGS Pavement) In Estonia

2021 ◽  
Vol 1202 (1) ◽  
pp. 012015
Author(s):  
Romet Raun ◽  
Marek Truu
Keyword(s):  
Surface Layer ◽  
Modern Technology ◽  
Quality Improvements ◽  
The Road ◽  
Extra Effort ◽  
Main Requirement ◽  
Bonus System ◽  
Asphalt Paving ◽  
Road Paving ◽  
Required Quality

Abstract Paving is one of the most crucial stage in the matter of road lifespan, since it is the surface layer that has stand up to all the external factors (weather, traffic etc.). Insufficient pavement density caused by thermal segregation during paving works can reduce the lifespan significantly, especially in Estonian climate (freeze-thaw cycles). Modern technology offers different solutions to reduce the risk of low quality in asphalt production and road paving works. Mobile asphalt plant, feeder and thermo-isolated trailers are some piece of equipment, that contractor can use to level up the minimal required quality requirements. The question is, when to use those and which to use? Moreover, is there any possibility to motivate the contractors to put in some extra effort? In Estonia, motivational bonus-system has been established to encourage innovation and reward the extra effort that has been made for quality improvements. The methodology is based on years of experience gained in different researches and pilot-projects. There are no strict rules for the road paving equipment in the methodology – for example contractor can choose himself either the feeder or/and thermo-insulated trailers are used on not. The main requirement is that the temperatures of entire paving process (surface layer) has been measured and analyzed by special thermographic system. Current presentation discusses the symbiosis of bonus-malus system and development of special thermographic system (TGS Pavement) as a multifunctional tool in asphalt paving in Estonia.

A discussion on ship technology in the 1980s - Shipbuilding in the future

1972 ◽  
Vol 273 (1231) ◽  
pp. 13-21 ◽  
Keyword(s):  
Industrial Development ◽  
Manufacturing Industry ◽  
Group Technology ◽  
Modern Technology ◽  
Point Of View ◽  
Production Lines ◽  
The Road ◽  
Craft Industry ◽  
And Control ◽  
Capital Intensive

The growth in world trade and hence the demand for shipping is expected to continue into the 1980s despite the present temporary recession. Many countries in the Mediterranean and Pacific area and in South and Central America see shipbuilding as their way to start along the road to industrial development, and will be favoured by good climatic and labour conditions which can now be joined to imported modern technology. Conventional shipbuilding will therefore grow rapidly in these countries. Western countries will be able to preserve their shipbuilding industries by keeping in the forefront ol technical development and by a rigorous examination of designs from the production point of view, in order to reduce the labour content, and make the management and control simpler. This means changing from a largely labour intensive craft industry to a capital intensive, manufacturing industry. In order to sustain this type of industry long runs of similar ships, standard components, modulai constructions much of it in production lines, using group technology, will be the pattern in the 1980s. Much research and development is already devoted to these techniques and the industry is already at the early stages of changing over to this type of working.

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 Profile and contour grinding of compressor blade butts

2016 ◽  
Vol 1 (1) ◽  
pp. 15-19
Author(s):  
В. Полетаев ◽  
V. Poletaev ◽  
Е. Цветков ◽  
E. Tsvetkov
Keyword(s):  
Surface Layer ◽  
Coordinate System ◽  
Quality Parameters ◽  
Compressor Blade ◽  
Improve Performance ◽  
Compressor Blades ◽  
Part Surface ◽  
Required Quality ◽  
Blade Production

The existing technologies of production of compressor blade butts related with traditional machining methods, including broaching and milling. Application of these machining methods requires further superfinishing operations to ensure the required quality of compressor blades. The automated highly-productive grinding of blade butts is an effective method to improve performance and quality of blade production. The technologies of profile and contour grinding of blades of a rotor and a compressor stator provide an automated machining of the outer parts contour in the same coordinate system, implement machining based on 3-D models of theoretical blade surfaces, ensure the required quality parameters of the part surface layer without additional finishing operations.

scholarly journals Lowering Transport Costs and Prices by Competition: Regulatory and Institutional Reforms in Low Income Countries

2019 ◽  
Vol 11 (21) ◽  
pp. 5940 ◽  
Author(s):  
Phill Wheat ◽  
Alexander D. Stead ◽  
Yue Huang ◽  
Andrew Smith
Keyword(s):  
Low Income ◽  
Evidence Base ◽  
Freight Transport ◽  
Sub Saharan Africa ◽  
Low Income Countries ◽  
Quality Improvements ◽  
Transport Costs ◽  
Institutional Reforms ◽  
The Road ◽  
Sub Saharan

High passenger and freight transport costs are a barrier to economic growth and social mobility, particularly in Low Income Countries (LICs). This paper considers the current state of knowledge regarding the barriers to achieving lower generalised transport costs. It considers both the road and railway modes across passenger and freight transport. These issues include a reform on the regulations for driver hours (preventing the road infrastructure from overloading), structuring rail concessions, increasing competition, and tackling corruption. Such reforms aim to deliver efficiency gains and service quality improvements at lower costs for users. This paper identifies the knowledge gap in previous research and concludes by setting out a research agenda that builds the evidence base for how the best practices from around the world can best be applied to the specific circumstances in Low Income Countries, with a particular focus on Sub-Saharan Africa and South Asia.

Total versus inhalable sampler comparison study for the determination of asphalt fume exposures within the road paving industry

2004 ◽  
Vol 6 (10) ◽  
pp. 827 ◽  
Author(s):  
Anthony J. Kriech ◽  
Linda V. Osborn ◽  
Herbert L. Wissel ◽  
Joseph T. Kurek ◽  
Brenda J. Sweeney ◽  
...  
Keyword(s):  
Comparison Study ◽  
The Road ◽  
Road Paving

scholarly journals The Preliminary Test

1985 ◽  
Vol 9 (7) ◽  
pp. 139-139
Author(s):  
M. W. Forth
Keyword(s):  
Preliminary Test ◽  
Modern Technology ◽  
Aptitude Testing ◽  
The Road ◽  
Clinical Content ◽  
On The Road

Suggestions have been made that the Preliminary Test for the Membership of the College should be modified in the direction of a reduced theoretical and enhanced clinical content. I would applaud such a move. Behind it is the idea of testing, early in a junior's career, his or her talents for the processes central to the practice of their chosen specialty. This sort of test has for too long been lacking throughout the profession of medicine. There is no reason why psychiatry should not now, with the advantage of modern technology, set the pace by combining an element of aptitude testing in the earlist hurdle on the road to specialist status.

Sign in / Sign up

Export Citation Format

Share Document