Road Construction Technology Research Articles

DESIGN OF LOW VOLUME CONCRETE ROADS

This article by Robert G. Huber explores the evolution and benefits of low volume concrete roads, focusing on the pioneering use of the slipform paving method in Iowa. It traces the origins back to 1946 when James W. Johnson conceptualized a machine that laid concrete without the need for side forms. Successive developments led to the creation of more advanced machines, with the first practical applications on county highways by the late 1940s. By the 1950s, the method had spread beyond Iowa, as other states and equipment manufacturers recognized the efficiency and cost-effectiveness of slipform paving. Notably, the slipform paver underwent significant improvements, facilitating its adoption for wider use. The paper details the specific adjustments in design and operation made in Iowa, such as the adoption of Type B concrete with varying cement content suitable for local conditions, and adjustments to subgrade preparation to enhance durability and performance. It also discusses the economic benefits, highlighting significant cost savings over traditional paving methods, alongside the reduced maintenance costs observed in Washington County. Furthermore, Huber elaborates on the broader adoption of slipform paving, predicting its dominance in the paving industry. The narrative is supported by data on road paving activities and costs over the years, providing a comprehensive view of the method’s impact on road construction in Iowa. This historical and technical account not only underscores the innovation's practicality but also its role in advancing road construction technology, making a case for its continued use and development. (Abstract generated by AI tool ChatGPT 4)

Analysis of new road construction technologies in Ukraine and abroad

Abstract This article discusses the long-term and short-term benefits and disadvantages of using cement concrete roads compared to asphalt roads. Modern technologies of cement concrete pavements are listed, including: exposed aggregate concrete, whitetoppingand the technology of roller compacted concrete pavement is considered in detail. The expedient spheres of use of roller compacted concrete, advantages and problems of studying this technology are determined.

Stabilization of Loose Soils as Part of Sustainable Development of Road Infrastructure

In the context of growing demand for road infrastructure expansion, sustainability is of key importance. Enhancing road construction technology ensures efficient, durable transportation infrastructure, vital for economic growth. Responsible road construction, especially in areas of historical and environmental significance, is essential. Preserving ecosystems and local heritage in road planning protects valuable areas and supports regional sustainability. Rural roads, often in forested areas, should maintain natural aesthetics. Economic challenges require flexible, efficient roads. Many existing unpaved roads, especially in rural and forest environments, fail to meet increasing traffic and load of heavy agricultural and maintenance vehicles. Soil stabilization methods, discussed in various publications, offer sustainable solutions. Research on ecofriendly binding additives provides the opportunity to reduce cement consumption and CO2 emissions. Such innovations enhance road efficiency, reduce maintenance costs, and benefit the environment. Investing in modern road technologies mitigates climate change effects by reducing emissions and protecting ecosystems. Our research indicates that soil stabilization technologies significantly improve road strength and durability. Additives can increase compressive strength by over 50% with minimal cement content. Continued research into road quality and durability is vital for sustainable transport infrastructure development. The results presented in this paper were obtained after two periods of solidification: after 7 and 30 days, with three types of ads (ion-exchangeable, chemical, and polymeric) to cement. In all tests, compaction strength improved by at least 35% in samples with the lowest cement content.

Comparison of Marshall Quotient Value on Laston Ac-Wc with Additional Pecan Shell Charcoal Waste

Some factors that affect the durability of asphalt include the type of asphalt concrete mixture used, Mixed materials must have good mechanical properties and be able to support high traffic loads. This study aims to determine the characteristics of marshalls in the addition of asphalt coated concrete wear (laston AC-WC with a percentage of hazelnut shell charcoal mixture of 0%, 2%, 3%, and 5%, and determine the effect of the quality of stiffness of the hazelnut shell charcoal waste mixture. This study used the marshall test method. The results showed that wear-coated concrete asphalt (AC-WC) with the addition of 5% hazelnut shell charcoal met the specifications, as well as a mixture of asphalt concrete with a charcoal content of 0% hazelnut shells or pure test objects. The value of VIM, and VFA is not a percentage of 0%, 2%, 3%, and 5% that meet the predetermined specification so that the difference in pure Ac-Wc laston and Ac-Wc laston with coconut shell charcoal additives, can be proven by the Marshall quotient value in the absence of a mixture with an average Marshall Quotient value of 590.13 Kg, in a mixture of 2% with an average Marshall Quotient value of 1004.91 Kg, on a mixture of 3% with an average value of 1024.99 Kg, and on a mixture of 4% with an average value of Marshall Quotient of 681.93 Kg. Thus, it can contribute to the development of road construction technology and become a reference in the use of hazelnut shell charcoal in wear-coated concrete asphalt mixture (AC-WC) as an alternative to environmentally friendly and sustainable mixed materials

Analysis of Asphalt Concrete Highway Construction Technology in Highway Engineering

In recent years, asphalt concrete has been commonly used for construction in highway engineering in China. In actual construction, asphalt concrete construction technology has a serious impact on the quality of highway engineering. Therefore, in order to strictly control quality and effectively avoid safety accidents during highway engineering construction. This requires relevant personnel to strengthen the analysis and research of asphalt concrete road construction technology, in order to meet the latest requirements for the quality of concrete pavement construction in the context of rapid urbanization in China. The following article will analyze the construction technology of asphalt concrete engineering in highway engineering, hoping to have a certain effect on improving the quality of highway engineering construction in China.

Study on the truck axle load limit for rural roads based on the cost of the concerned entities in China

Study on the truck axle load limit for rural roads based on the cost of the concerned entities in China

APPLICATION OF GEO-NATURAL FIBERS AND SUBGRADE CONSTRUCTION

The use of geo-natural fibres in subbase and subgrade construction is a new and environmentally friendly way to improve the mechanical qualities and durability of road and pavement infrastructure. The inclusion of various geo-natural fibres, such as jute, coconut, and sabai grass, into the subbase and subgrade layers of road building is investigated in this study. These natural fibres are environmentally friendly and locally available, making them an appealing alternative to typical building materials. The study looks at how these fibres affect the engineering properties of subbase and subgrade layers, such as tensile strength, load-bearing capacity, and resistance to soil erosion. The findings show that using geo-natural fibres improves soil stabilization, reduces settlement, and increases resilience to moisture-induced damage. This study highlights the importance of sustainable construction techniques by encouraging the use of bio-based materials that lower the environmental imprint of infrastructure development. The findings have significance for low-cost, ecologically friendly road construction technologies, particularly in areas where natural fibres are abundant. Keywords:Geo-natural fibers, jute, coconut, sabai grass, subbase, subgrade construction, soil stabilization, sustainability, eco-friendly materials, road infrastructure, mechanical properties, load- bearing capacity

10.52209/1609-1825_2023_2_174

A mathematical model is presented for obtaining data on reduced costs, which can be used in the optimization of machine sets to improve the recruitment process for mechanized detachments during road construction. The mathematical model for calculating the reduced costs, taking into account the probability coefficients for the use of equipment in the set, is built on the basis of a matrix that includes nine columns for types of machines and six rows for the main road construction technologies. By changing the basic input data, the model allows you to automatically recalculate all data. By applying the minimization criterion, it is possible to choose such a set that the total reduced costs for each set of machines and for each technology would be minimal. Optimization of a set of machines of various sizes for mechanized detachments, when designing roads, will reduce the time for building roads and reduce costs.

Analysis of New Materials Application in Municipal Road Construction

In order to promote the development of road traffic in our country, it is necessary to strengthen the research on municipal road construction technology, constantly innovate construction technology and construction technique, and then effectively ensure the rapid development of urban traffic. This paper mainly elaborates on asphalt road surface regeneration technology, modified asphalt concrete, concrete road surface anti-cracking technology, three-dimensional printing technology, composite material road surface, polymer composite materials, etc., to ensure the development of urban transportation and the quality of municipal road projects.

Common quality problems and countermeasures in road construction technology

Common quality problems and countermeasures in road construction technology

Research on permeable concrete road construction technology and quality inspection

Research on permeable concrete road construction technology and quality inspection

Intelligent Generation and Analysis of the Municipal Road Construction Scheme Based on the KNN Algorithm

The construction of municipal road engineering is a complex system engineering, and its internal components are interconnected and mutually restricted, and the relationship is intricate. The quality of its construction plan directly affects the realization of the project's quality, safety, environment, progress, cost, and other goals, and the project construction plan occupies an important position in the construction of the project. The selection of construction plans for municipal road projects involves a wide range of areas. According to the characteristics of specific municipal road engineering projects, it is very important to establish a scientific construction scheme intelligent generation model and select the optimal construction scheme suitable for the project from many feasible construction schemes, which has very important theoretical research value and practical application value. After analyzing the knowledge characteristics of road construction technology and the content of road construction schemes, this study decomposes the knowledge of road construction schemes into two parts: case characteristics and solutions. Then, according to the needs of case retrieval technology, the data storage form of each subdivision index is proposed and the value range is explained, and a complete structure form of the road construction scheme case database is formed. Combined with actual engineering cases, the feasibility and applicability of the intelligent generation method of the road construction scheme based on the KNN algorithm is confirmed, which provides a new idea for the automation of road construction scheme preparation and the improvement of the scheme application effect.

Influence of traffic load on the environmental impacts of roads: A1 and A2 highways in Austria

Professionals should aim to significantly reduce greenhouse gas (GHG) emissions by implementing the best road construction technologies to develop low-carbon projects. Although the traffic loads vary over the road length, the environmental impacts are assessed based on the average values of the traffic loads. Consequently, there is a gap between reality and the impacts calculated with fixed traffic load. This paper aims to assess the gap in terms of the environmental impacts of two roads by considering both a constant and a variable traffic load. With the help of a life cycle assessment (LCA), the environmental impacts of the A1 and A2 highways in Austria are calculated. We have calculated the impacts in the first scenario by considering an average traffic load. In the second scenario, based on real measurements, the environmental impacts of both highways are calculated for a variable traffic load. In the end, the results show a gap in the range of 25 %. This difference was because some parts of the roads required frequent repair. Besides, we figured out the optimal thickness of the wearing course, which improves the impact calculation and makes it less likely that the results will be different along the length of the road.

Estimating Greenhouse Gas Emissions from Road Construction by Considering the Regional Differences in Carbon Emission Factors of Cement: The Case of China

Rapid road construction and expansion in China resulted in massive GHG emissions. The carbon emission factors of raw materials, particularly cement, have a significant influence on the calculation of GHG emissions from road construction. This study estimates GHG emissions from road construction by taking into account regional differences in cement carbon emission factors. The results indicate that (1) total GHG emissions from road construction have a “U” shape from 2009 to 2019, with the highest level being 437 million t CO2e 2009 and the lowest level being 184 million t CO2e in 2017; (2) Class-Ⅳ roads account for roughly 80% of total GHG emissions from road construction; and (3) GHG emissions from road construction are shifting from east to west regions. This is the first paper to calculate GHG emissions from road construction by taking into account both road type and cement carbon emission factors. The findings of this study could provide references for transportation agencies to better understand the impacts of road construction to climate change and improve policymaking, especially for the development of road construction technologies and raw material production technologies.

Analysis of the Effective Path of Strengthening Rural Road Construction Technology Management

Analysis of the Effective Path of Strengthening Rural Road Construction Technology Management

Road Construction Technology and Crack Treatment Measures

Road Construction Technology and Crack Treatment Measures

Control Points and Common Diseases Prevention Measures of Municipal Road Construction Technology

Control Points and Common Diseases Prevention Measures of Municipal Road Construction Technology

Development of an algorithm for the introduction of innovative technologies in the construction of roads

This article provides an analysis of the current state of the road industry in Russia. There are factors that increase the demand for innovative road construction technologies. The authors have developed an algorithm for the introduction of innovative technologies in road construction. The algorithm developed by the authors will allow road construction enterprises to make informed decisions in choosing the directions of their development. It also enables an enterprise to more clearly identify its market positions and take measures to improve them, solve problems and increase the efficiency of its activities.

Design of roller compacted concrete composition

Abstract. Problem. World experience shows that high operational performance of road coverings in the conditions of intensive traffic with high speeds of motor transport and sharp braking are provided by introduction of cement concrete. One of the effective solutions for the construction of high-quality, dura-ble, economical pavements is the use of roller-compacted concrete - a no slump concrete with low water-cement ratio, that is placed by an asphalt pav-er similar to asphalt pavement construction. The design of quality mixtures of roller-compacted con-crete is based on performance, construction require-ments and economic efficiency. Goal. The purpose of the work is design the compositions of roller com-pacted concrete and investigation of their strength. Methodology. Roller compacted concrete samples were tested for compressive strength and tensile bending in accordance with DSTU B B.2.7-214:2009. Results. The four variants of mixtures are designed to select the optimal composition of roller compacted cement concrete. The first of one is based on the particle size distribution of aggregate grains in ac-cordance with DSTU B B.2.7-127:2015, the second variant shows the composition of normal-weight cement concrete class C25/30, the third variant is characterized by increased sand fraction and in the fourth composition fine fractions replaced with sand. Road rolled concrete С32/40 Bb b5.2 is designed. Originality. Roller compacted cement concrete for effective road construction technologies is designed, which allows to perform the installation of high per-formance cement-concrete pavement with the use of asphalt pavers and rollers and the possibility of rap-id commissioning of cement-concrete pavement. Practical value. Designed composition of roller compacted concrete with the use of local Ukrainian materials allow to ensure the construction of cost-effective, durable road pavement with the possibility to carry out the movement on the cement concrete pavement after 1-3 days.

ЭКОНОМИЧЕСКАЯ ЭФФЕКТИВНОСТЬ СТРОИТЕЛЬСТВА КУСТОВЫХ ПЛОЩАДОК НЕФТЕПОДГОТОВКИ В СЛОЖНЫХ УСЛОВИЯХ КРАЙНЕГО СЕВЕРА

The development of oil and gas fields, especially in the Far North, which are caused by complex climatic, geological and geocryological conditions, requires the introduction of innovative technologies. Today, a common option for the development of oil treatment fields is to organize them according to the cluster principle. Providing efficient access to cluster oil treatment is one of the key tasks in the development strategy of the Northern territories of Russia. The article focuses on evaluating the efficiency of the introduction of innovative technologies in the construction of road surfaces in the difficult conditions of the Far North using nanofibrobeton. It is proposed to use a special very light concrete or cellular gas-fiber concrete, which is a dry mixture of non-autoclave production, which is delivered dry to the construction site and only diluted with water directly on site in the volume necessary for a specific operation, after which it is poured into the monolith on the spot. When building access roads when creating an oil and gas field, it is necessary not only to create access roads, but also paths that connect the objects of the field with each other. The use of light concrete in creating access roads, as well as paths that connect the objects of the field with each other, has a number of advantages, especially in terms of low weight and strength. In addition, this coating protects the base from bad weather conditions. This paper presents a comparative calculation of the economic efficiency of using various road construction technologies in these conditions. A detailed overview of the existing tools for evaluation the capital investments, taking into account the time factor, is presented. The specifics of the investment evaluation of the project for the use of nanofibro-concrete for the development of oil and gas fields is a significant service life of the road surface and, consequently, cost savings for current and major repairs.