scholarly journals Choice of road building technology - statistic analyses with the use of the Hellwig method

2018 ◽  
Vol 45 ◽  
pp. 00081 ◽  
Author(s):  
Izabela Skrzypczak ◽  
Wojciech Radwański ◽  
Tomasz Pytlowany
Keyword(s):  
Building Materials ◽  
Asphalt Pavement ◽  
Road Construction ◽  
Concrete Pavements ◽  
Pavement Maintenance ◽  
Road Building ◽  
The Road ◽  
Building Technology ◽  
Advantages And Disadvantages ◽  
The Moment

There are two technologies for road construction, e.g. an asphalt one and a concrete one, that exist in the market of road infrastructure at the moment and they both have their advantages and disadvantages [prof Jan Deja of Krakow Mining Academy, Cathedral of Building Materials Technology].The advantage of concrete pavement consists of the fact that it doesn’t require bigger financial expenditures within 10 – 20 years of exploitation (provided that necessary pavement maintenance treatments are carried out). In the case of asphalt pavement it is necessary to mill the wear off layer of the road already after 6-7 years. It leads to the question: which of these technologies should be chosen, which is better? The work hereby carries on analyses concerning a comparison of the technologies for road constructions; the asphalt one and the concrete one. Based on the analyses carried out with the use of the Hellwig method it was found that the achieved values of synthetic meters for asphalt and concrete pavements are close to each other, which may indicate that both technologies are comparable within the sectors taken for analyses in relation to accepted technological-technical and usability features.

Building Mulholland Highway: The Road to Mulholland Drive

2017 ◽  
Vol 99 (2) ◽  
pp. 184-226
Author(s):  
Barry Read
Keyword(s):  
Problem Solving ◽  
Road Building ◽  
The Road ◽  
Building Technology ◽  
One Year ◽  
Mulholland Drive

A sequel to the author’s article in the preceding issue on the origins, purpose, and planners of Los Angeles’s scenic Mulholland Drive, this article traces the phenomenal accomplishment of the 24-mile mountain road’s construction in one year and under budget. It details the supervision and problem-solving by construction engineer DeWitt L. Reaburn, the bureaucratic streamlining, the use of the latest 1920s road-building technology, and the efficient manpower logistics that made this possible.

FEATURES OF FIXED AND CURRENT FUNDS REPRODUCTION IN ROAD CONSTRUCTION ENTERPRISE

2020 ◽  
Vol 2 (12) ◽  
pp. 26-31
Author(s):  
T. N. KOSTYUCHENKO ◽  
◽  
D. O. GRACHEVA ◽  
M. B. CHEREMNYKH ◽  
◽  
...  
Keyword(s):  
Road Construction ◽  
Building Industry ◽  
Construction Enterprise ◽  
Road Building ◽  
The Road ◽  
Material Resources ◽  
Building Enterprise ◽  
Practical Recommendations

The article outlines the aspects of the development of reproduction processes in the road-building industry, provides practical recommendations for their normalization, contributing to an increase in the efficiency of using fixed and circulating assets. The paper investigates and developed measures to rationalize the process of reproduction of material resources of a particular road-building enterprise, taking into account their impact on the value of the business.

Strategies for Promoting the Use of Concrete Pavements in Tanzania: Technical and Institutional Considerations

2008 ◽  
Vol 31 (1) ◽  
pp. 53-62
Author(s):  
D.A. Mfinanga ◽  
H. Bwire
Keyword(s):  
Road Construction ◽  
Cost Effective ◽  
Petroleum Products ◽  
Concrete Pavements ◽  
Construction Technology ◽  
The Road ◽  
Competing Demands ◽  
Resource Requirements ◽  
On The Road ◽  
Economic Developments

High-type roads in Tanzania have been predominantly of asphaltic concrete construction. This ever enlarging and ageing asphaltic road network represents increasing resource requirements on the road agency in the form of maintenance. Limited resources coupled with the ever sky-rocketing costs of petroleum products and the competing demands of social economic developments, presupposes the need to look for alternative road construction technology that is more cost-effective and resource optimising. Experience gained from developed and some developing countries where concrete pavements have been widely used suggests the potential of this type of pavement in many developingcountries. This paper discusses the technical aspects of design and construction- and maintenance-related aspects of concrete pavements. The discussion extends further to highlight issues pertaining to the performance of concrete pavements and strategies for promoting the use of concrete pavements in Tanzania. Conclusions and recommendationsare made with suggestions on how to start implementing the proposed strategies.

scholarly journals EFFICIENCY OF REINFORCEMENT OF TECHNOLOGICAL SOIL BY MINERAL MODIFIERS

2019 ◽  
Vol 4 (7) ◽  
pp. 14-23
Author(s):  
Т. Дмитриева ◽  
T. Dmitrieva ◽  
Н. Куцына ◽  
N. Kucyna ◽  
А. Безродных ◽  
...  
Keyword(s):  
Raw Materials ◽  
Road Construction ◽  
Soil Reinforcement ◽  
Production Costs ◽  
Concrete Mixture ◽  
The Road ◽  
Physicomechanical Characteristics ◽  
Advantages And Disadvantages ◽  
Complex Binder ◽  
Technogenic Raw Materials

The paper discusses the main aspects of soil reinforcement in road construction by adding a binder component to them. The use of this technology allows to solve the problem of high-quality raw materials shortage while improving the physicomechanical characteristics or keeping them at the same level, as well as to increase labor productivity and reduce production costs. The technogenic raw materials for the production of soil concrete were studied, the main physicomechanical characteristics and requirements that must be taken into account when selecting the composition of the soil concrete mixture were analyzed. The paper compares the physicomechanical characteristics of the road composite, reveals the advantages and disadvantages of introducing binder components of various types: cement, cement with modifier and a complex binder. It has been established that the introduction of a complex binder or cement with modifier contributes to the improvement of the physicomechanical characteristics while reducing the consumption of cement in the composition of the soil-concrete mixture compared to traditional soil-concrete with cement.

scholarly journals A Case Study of Industrial Symbiosis to Reduce GHG Emissions: Performance Analysis and LCA of Asphalt Concretes Made With RAP Aggregates and Steel Slags

2020 ◽  
Vol 7 ◽  
Author(s):  
Alessandra Bonoli ◽  
Anna Degli Esposti ◽  
Chiara Magrini
Keyword(s):  
Life Cycle ◽  
Asphalt Pavement ◽  
Ghg Emissions ◽  
Road Construction ◽  
Industrial Symbiosis ◽  
Current Case ◽  
Recycled Materials ◽  
The Road ◽  
Emilia Romagna Region

The concept of sustainability in the road construction sector is a complex issue because of the various steps that contribute to the production and release of greenhouse gas (GHG) emissions. Addressing this issue, the European Commission has put various policy initiatives in place to encourage the construction industry to adopt circular economy (CE) and industrial symbiosis (IS) principles e.g., the use of recycled materials. Cooperativa Trasporti Imola (CTI), a company located in the Emilia-Romagna region (Italy), has been chosen for the current case study to examine practices, management, and the industrial symbiosis network among various companies in the road construction and rehabilitation sector. In this regard, the use of steel slags, obtained by an electric arc furnace (EAF), and reclaimed asphalt pavement (RAP), obtained by the deconstruction and milling of old asphalt pavement have been investigated. Two mixtures of recycled hot Mix Asphalt (HMA) i) were prepared incorporating different recycled material percentages for the wearing and binder course, respectively, ii) were characterized in terms of size distribution, strength modulus and volumetric properties, iii) and finally were compared to the performances of two mixtures entirely designed by virgin materials for the wearing and binder course, respectively. Therefore, the Life Cycle Assessment (LCA) tool was chosen to evaluate the environmental impacts that affect the designed road life cycle. The results show that recycling RAP and EAF slags in a CTI batch plant provides benefits by reducing the consumption of virgin bitumen and aggregates and by reducing CO2eq emissions. Finally, practical implications on the use of recycled materials in new asphalt mixtures from a life cycle and industrial symbiosis perspective are provided.

scholarly journals Mountain roads development in Nepal: engineering geological concerns

2000 ◽  
Vol 22 ◽  
Author(s):  
Birendra B. Deoja
Keyword(s):  
Multidisciplinary Approach ◽  
Social Economic ◽  
Road Construction ◽  
Road Building ◽  
The Road ◽  
Mountainous Regions ◽  
Planning And Management ◽  
Mountain Terrain ◽  
Linear Infrastructure

Road construction in the mountainous regions of Nepal has not only added to the road building experience in the rugged mountain terrain but also created awareness that development of linear infrastructure in the mountainous regions requires multidisciplinary approach from social, economic, engineering, environmental, and biotechnical considerations besides substantial engineering-geological inputs. This paper tries to provide a brief account of the practices and developments in mountain-specific planning and management of infrastructure on the basis of experiences from Nepal.

Study of High-Quality Concrete Properties for Roadway Surfaces

2019 ◽  
Vol 974 ◽  
pp. 477-481
Author(s):  
O.V. Kazlitina ◽  
E.S. Glagolev ◽  
A.S. Milkina ◽  
S.A. Kazlitin
Keyword(s):  
Building Materials ◽  
Systematic Approach ◽  
Road Construction ◽  
Fiber Reinforced Concrete ◽  
Concrete Pavements ◽  
Material Consumption ◽  
Cement Concrete ◽  
Concrete Properties ◽  
The Cost ◽  
High Degree

Currently, the device of cement concrete pavements is still less popular than the asphalt covering. In the construction of roads, great attention should be paid to the widespread use of new, efficient building materials and products of improved quality, with a high degree of prefabrication, ensuring an increase in the level of industrialism, a reduction in material consumption and the cost of road construction. The experience of research, design and devices allows a systematic approach to the design appointment, the choice of materials and technologies for the device of cement concrete roads. The device of cement concrete web of fiber-reinforced concrete is one of the promising areas in the construction complex.

Integrated forest harvest planning and road-building model with consideration of economies of scale

2020 ◽  
Vol 50 (10) ◽  
pp. 989-1001
Author(s):  
Azadeh Mobtaker ◽  
Julio Montecinos ◽  
Mustapha Ouhimmou ◽  
Mikael Rönnqvist
Keyword(s):  
Economies Of Scale ◽  
Road Construction ◽  
Mixed Integer ◽  
Mixed Integer Linear Program ◽  
Road Building ◽  
The Road ◽  
Building Model ◽  
Wood Processing ◽  
Proposed Model ◽  
Transportation Plan

We consider the problem of tactical forest management over a 5-year horizon with yearly periods. The main decisions made consider which harvest areas to cut in each period, the flow of timber from an area to each wood-processing mill to satisfy its annual demand, and which roads to build to access a harvest area not connected to the existing road network. The goal is to minimize the total transportation and road-building costs subject to budget limitations. To explore the benefits of economies of scale (EOS) in road construction, we incorporated this notion in the proposed model. Then, the efficiency of the obtained solution is compared with the model without EOS. The proposed model is a mixed-integer linear program, including several timber assortments and multiple periods. We validated the model for a realistic case in the context of the province of Quebec. The results demonstrate that consideration of EOS significantly reduces the total cost by about 5.3%. In the EOS solution, the road segments that are built every year are very concentrated in specific parts of the region, allowing a road-building company to take advantage of EOS. Moreover, this solution provides a much more efficient timber transportation plan.

Utilization of Hydrolysis Lignin in Compositions Soil-Cements

2019 ◽  
Vol 23 (11) ◽  
pp. 32-37
Author(s):  
N.A. Konovalova ◽  
O.N. Dabizha ◽  
P.P. Pankov ◽  
E.A. Rush
Keyword(s):  
Portland Cement ◽  
Model Experiment ◽  
Building Materials ◽  
Raw Materials ◽  
Hydrolysis Lignin ◽  
X Ray ◽  
Road Building ◽  
The Road ◽  
Hydrolyzed Lignin ◽  
Scanning Electron

The article investigated the compositions of road-building materials containing screenings of rock crushing, Portland cement, hydrolyzed lignin, modified by the stabilizing additive “Element”. The road-building compositions containing screenings of rock crushing, Portland cement, hydrolyzed lignin modified with the stabilizing additive "Element" were investigated. The optimal content of raw materials has been established, which allows to obtain soil-cements with a strength mark of at least M 60 - M 75. Using a model experiment, it was shown that the stabilizing additive “Element” is active and can interact with each of component of the raw materials. Using the methods of scanning electron microscopy, infrared spectroscopy, X-ray phase analysis, it has been experimentally shown that the processes of hydration, carbonization and increasing the connectivity of orthosilicate anions play a significant role in the structure formation of soil-cements.

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