Highways

For the rehabilitation of rutted asphalt pavements white topping and ultra thin white topping turned out to be adequate methods. The force-fit bonding between asphalt and concrete is a pre-condition for the functioning and durability of this method. Little attention is paid on testing of the bonding; in the majority...

The paper presents the main findings of a 3-year project to develop new designs and specifications for continuously reinforced concrete pavement (CRCP). The performance and design parameters investigated were surface cracking, the concrete strength, and the foundation. The effects of these parameters on the structural integrity and durability of CRCP...

The durability of concrete pavement depends on its load bearing capacity and the performance properties of the surface texture during use. During wet weather conditions the textured surface should provide good tyre grip for safety reasons. In recent years increased focus has been placed on the noise emitted by road...

From some job sites it was reported that the air void content of the hardened road concrete was considerably higher than that of the fresh concrete. Initial investigations in the Research Institute with six air-entrainers based on synthetic and natural active agents showed that a substantial increase in air content...

A number of public road laboratories are working together in an OECD/ECMT project. The aim of this project is to evaluate two technical solutions for long-life wearing courses. It is intended that these would eliminate maintenance works for several decades after construction. One of which, called HPCM (High-Performance Cementitious Material)...

Construction of Cement Concrete Pavement on National Highways started in India during the year 1991 when Ministry of Surface Transport, Government of India, under took four laning of 112 Kms. long Delhi – Mathura Section of NH-2. Construction of Cement Concrete Pavement picked up in 1998 with the implementation of...

Since 2001 the design with an interlayer of geotextiles is a standard structure in the German pavement catalogue RStO 01. Geotextiles shall guarantee uniform, elastic support of the concrete slab, hence reducing stresses due to temperature and moisture gradient, reduce pumping processes and prevent an origination of reflection cracks from...

The design period of pavements in Austria is in general defined with 20 to 30 years. According to the Austrian standards and guidelines for pavement design the design life for bituminous roads is 20 and for concrete roads is 30 years. Looking at existing roads, it can be recognized that...

The European Long-Life Pavement Group (ELLPAG) was formed in 2000 as a working group by the Forum of European National Highway Research Laboratories (FEHRL) members, under the auspices of the Conference of European Directors, to report the current state of knowledge on long-life pavements in Europe, in particular on the...

Concrete road surfaces with useful properties and a long useful life have been constructed for many decades, but further development is still required due to changing boundary conditions. Here, the important challenges are the increase in traffic load as well as specific requirements to traffic safety, environmental compatibility and economic...

In recent years, a new material has been experimented in Italy for road pavement foundations. It is a mixture made of Waste Foundry Sand (WFS) and Construction and Demolition (C&D) aggregate, water and CEM 32.5R cement, the performances of which can be compared to those of traditional cement bound granular...

The paper presents the analysis of the numerical model of airport slab and foundation under thermal loading. Various types of constrain (unilateral and bilateral) between slab and foundation have been taken into consideration. Numerical data has been compared with experimental results, concerning vertical displacements of airfield plate subjected to the...