Results of a rehabilitation project for the runway nr.1 of the Otopeni Airport at Bucarest by using the Falling Weight Deflectometer (FWD). The paper describes how the deflection basin produced by the FWD can be used to characterize the pavement behaviour and to backcalculate the Young modulus (E) of the...
Experiences with Noise Reducing Surfaces for Existing Concrete Pavements
In Carinthia a surface dressing with epoxy resin as binder and chippings 3/4 mm has been used since 1989. The task was to get better noise reducing conditions of existing concrete pavements. The result can be seen in noise reducing properties of - 6 db(A) compared with the existing old...
The Austrian Specifications for Concrete Pavements
The latest version of the Austrian specifications for concrete pavements include paving between fixed forms and slipforrn paving, super plasticized concrete, recycled concrete and noise reducing concrete surfaces. This paper describes exposed aggregate surfaces, the requirements for concrete pavements and the materials used to make them.
The Phenomenon of the Serviceability of Concrete Motorways after 55 to 60 Years under Traffic
At present there are still many hundreds of kilometres of concrete motorways in the former East Germany which were constructed in the thirties. The phenomenon is not the fact that now, especially after the last winter, a lot of them have reached a critical condition, but that until today all...
A CRCP Inlay for the Rehabilitation of a Deteriorated Concrete Pavement on a Motorway with Very Heavy Traffic
Short description of the rehabilitation works on the most heavily trafficked motorway in Belgium.
In Situ Capping Layers Treatment with the Faquir Equipment
The treatment of subgrades with hydraulic binders is designed to increase the bearing capacity of the roadbed significantly. It thus offers a better support to the worksite traffic and the subgrade can be taken into account in the overall structural design of the pavement. The economic stakes are thus evident....
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...
The Influence of Composition and Compaction on the Properties of Roller Compactcd Concrete
In many countries rullw cumpactod concrete (RCC) proved to be a success as a construction method for highly stressed industrial floors, for concrete pavements, subbases for concrete pavements and asphalt surfaces. Since 1993 the Research, Development and Consulting Department of tho Heidelberger Zement AG is attended with a research project...
A New Assortment of Cement (CD 40-A) Meant for Concretes for Roads, Motorways and Airport Runways
The use of CD 40-A cement eliminates the classical procedures of measuring plastifying and air entraining additives at the preparation on site of the road concrete. The article presents the main characteristics of CD 40-A and the results of laboratory tests carried out to establish the influence of this type...
Concrete Airport Areas Results of Recent Achievements
Owing to its anti-kerosene properties, its resistance to heat and punching, concrete is always used in the tarmac of the runway threshold of military airports and in the aprons of large-sized aircrafts in civil airports. Due to the strong competition with flexible structures, concrete is at disadvantage as far as...
Continuously Reinforced Concrete with Noise Reducing Surface for the Reconstruction of the E31 3 (Al 3) Motorway in Hasselt (Belgium)
rFor the reconstruction of the E31 3 motorway which was constructed with concrete slabs round about 1960, CRCP was chosen and since 1983 the exposed aggregate technique was applied there. As the conventional exposed aggregate concrete is still too noisy, in 1992 it was decided to pursue the reconstruction works...
Design and Construction of a Concrete Pavement on Compressible Muds
This paper deals with the design, construction and performance of a freeway section over a thick layer of compressible mud. Halfway on the Madrid to Zaragoza freeway, in the valley of the Jalón River, several very soft clayey deposits were found, originated by endorreic drainage basins. The ground treatment systems...