For networks owners, like the French national gas utility, it is essential to ensure a rapid access to their installations, even with a simple pick, for normal or emergency maintenance matters. Modular concrete pavements were developed during the last years for that purpose. In order to keep their stability, the...
Improving the Rehabilitation Timing and Selection in a Pavement Life Cycle Cost Analysis
Life Cycle Cost Analysis (LCCA) is an economic procedure used to compare competing pavement designs, over a defined analysis period, considering all significant costs expressed in equivalent present value dollars. Currently, most agencies apply a standard, policy set, rehabilitation schedule to all pavements based on historical performance. However, this can...
Recent Developments in the Design and Construction of CRCP Towards a More Durable Concept
The technique of continuously reinforced concrete for pavement construction is being applied in Belgium since the 1960s. The original design underwent several changes over time, sometimes for economic reasons but mostly in order to improve the long term behaviour of the pavements. Today there are still possibilities for further optimisation,...
Noise Emission of Concrete Pavement Surfaces Produced by Diamond Grinding
In Germany, diamond grinding is frequently used to improve the evenness and skid resistance of concrete pavement surfaces. Since diamond grinding has been observed to affect tyre / pavement noise emission favourably, the relationship between surface texture, concrete composition and noise emission of concrete pavement surfaces has been systematically investigated....
Performance Engineered Mixtures for Concrete Pavements in the US
Many concrete pavement mixtures in the US are proportioned based on recipes that have been used before, or on prescriptive specifications. As budgets grow tighter and increasing attention is being paid to sustainability metrics, greater attention is beginning to be focused on making mixtures that are more efficient in their...
PROMISING PROJECT – Concrete Roads
Countries that have little experience in concrete pavement design, application and operation, like Turkey, may face many difficulties while planning of concrete pavement construction (life-cycle, design, cost, technology and equipments etc.). We want to share as follows; managing the project, road map, learning phase, experiences, difficulties, mistakes and best practices...
Heated Transportation Infrastructure Systems Existing and Emerging Technologies
Ice and snow on pavement surfaces cost the U.S. national economy in snow removal, damaged pavement and lost man-hours due to travel delay. Common practices for removing ice and snow from pavement surfaces include spraying anti-ice chemicals on the ground and deploying snowplowing vehicles. These methods are labor-intensive, occasionally ineffective...
Texture and Noise Characteristics of Exposed Aggregate Concrete Road Surfaces
Exposed aggregate cement concrete (EACC) road pavements are used on a large portion of the Austrian federal motorway network due to their durability and reduced noise emission. The standardized types with 8 and 11 mm chipping sizes have been characterized due to their noise emission and are subject to approval...
An Industry Perspective to Improve the Life Cycle Cost Analysis Procedure Used for Pavement Type Selection a Case Study for Alabama
At the request of the cement and concrete industry, in 2012 the Alabama Department of Transportation (ALDOT) funded Auburn University and the University of Alabama to recommend updates to ALDOTs Life Cycle Cost Analysis (LCCA) methods for comparing asphalt and concrete paving alternatives. Auburn was asked to address LCCA from...
Comparison of Two Rehabilitation Worksites of Motorways Single Versus Double Layered CRCP
The technique of continuously reinforced concrete is used in Belgium for the construction or rehabilitation of heavily trafficked motorway sections. Since a few years, double layered CRCP is being considered in order to improve the rolling noise characteristics of the surface. In this paper, two worksites where CRCP was used,...
Concrete Pavements in the Czech Republic
The paper resumes the development of the concrete roads in Czechoslovakia, resp. in the Czech Republic over the span of time between two major specialized events held in Prague, in particular the XIVth World Road Congress 1971 and the 12th International Symposium on Concrete Roads in 2014. The concrete pavements...
The New Balastless Track Project from Idea to 1km Prototype
Within the frame of a French collaborative research program started in 2007, private companies, a public research laboratory and a rail network owner have jointly developed a new ballastless track structure (NBT) based on independent concrete slabs. This structure is dedicated to both very high speed operations and mixed passenger/freight...