Urban roadways represent considerable stakes from both the quantitative and qualitative standpoints, with the almost permanent concern today for integration with respect to the site and to users of public spaces. A non-exhaustive review of the trends in practices and tools available to designers, builders and managers of urban roadways...
Cement Concrete Structures in the Design of Urban Roadways
Air Entraining Agents in Road Concretes and Characterization of the Air Void System in the Fresh Concrete
Various air-entraining agents were investigated for their physicochemical characteristics and for their foaming power. Correlations were found between this power and the parameters characteristic of entrained air. These parameters were determined on the fresh concrete using the DBT "Air Void Analyser". Air-entrained concretes have a water absorption very similar to...
Low Noise Concrete Pavements in Germany
Noise protection has been a main concern in Germany for a long time. The contribution of the road surface to the reduction of traffic noise is recorded with correction values and taken into consideration in noise protection calculations which are legally significant in the planning and construction of roads. These...
Project Instrumentation Installation and Presentation of Results
This article presents the design criteria and operating procedures adopted for the installation of the instrumentation devices to record the variations in "sIowIy changing quantities affected by temperature and humidity as well as by traffic-induced dynamic" phenomena. Interesting trends and correlations between the various physical quantities measured have been found....
The Benefits to Turkey’s Economy of the Selection of the Pavement Superstructure
In this paper we discuss about how to select the best pavement type to minimize the pavement cost. It is studied which pavement type (flexible or rigid pavement alternatively) is more suitable for Turkey taking into account economic criteria. The most important parameters for choosing the type of pavement are...
Study on the Meclidilical Behaviour of Precast Concrete Pavements
Precast concrete pavements (PCCP) are constructed by placing small size precast concrete slabs on the subbase. In this paper, the loading and warping stresses are discussed based on the results of the experiment and FEM analysis. A test pavement was constructed using 1 - 3 m size and 150 mm...
Cycling on Peat
A cycle track had to be laid quickly on a poor load-bearing subsoil, 18 m of peat. The usual design would have caused excessive subsidence and damage to the adjacent road. The chosen solution was a "floating" structure. In the design the upward pressure of the groundwater was considered to...
Wear Resistant and Noise Reducing Concrete for Road Pavements
Rutting, depending on the wear of studded tyres, is a problem in the Skandinavian couritiis. Concrete pavements have a good wear resistance. In Ai.ustria they have recently developed a low noise concrete with small aggregate size and exposed aggregate. Earlier experiences have shown that the wear resistance of concrete is...
Noise Reduction on Concrete Paving Blocks
Today the people in the cities require, more than in former times, a nice looking but also noice reduced pavement. The aim of our one year trial in 1 9w92h,i ch was promoted by the Austrian innovation fund, was to fulfill the requirements mentioned above. 1200 m of new concrete...
Conclusions from the Longtime Behaviour of Cement Bound Road Bases
Cement-bound road bases of 16 heavily loaded Autobahns in West Germany (12 road bases under concrete pavements and 4 under asphalt pavements) were investigated regarding bond, damage due to frost and erosion, compressive strength, water permeability, frost and erosion resistance. The investigations showed that cement-bound road bases are proved in...
Longtime Behaviour of Concrete Roads and Efficiency
A project for a building sliuuld include a forecast obout the longtime behaviour. With the cost benefit analysis the technical longtime behaviour can be expressed in figures. In the case of the road pavements these costs are costs for the government and for the road users. The estirlIdLiull can be...
Development of a Test to Compare Anti-Reflective Cracking Treatments
In Spain, like in other European countries, during the last twenty years roads constructed with cement bound base layers have had many maintenance problems due to reflective cracking. It is impossible to know the effectiveness of the new treatments which are applied as anti-reflective cracking measures. Therefore a laboratory test...