Today all highways and road managers are confronted with the problem of the rutting of dense asphaltic concrete roads due to the steady traffic increase of heavy vehicles. Consequently, the lifetime of the low speed right lane decreases much faster than the lifetime of the left lane, which is merely...
Whitetoppings – Long Term Performance and Recommendations
Field tests have been carried out with thin, high strength concrete overlays (whitetoppings) placed on top of the milled asphalt pavement The aim is to find methods to restore rutted asphalt pavements and iliclease their rutting resistance. The whitetopping was limited to 70 mm. Both plain and steel fibre reinforced...
Surface Characteristics of Two Recently Constructed Trunk Roads in the UK
In an effort to tackle road traffic noise, research into quieter road surfaces has included trials of a new type of concrete surfacing called exposed aggregate concrete, which has been used in a number of other European countries. Two trials of exposed aggregate concrete have been constructed in the UK;...
Reconstruction of Bituminous Paved Rural and Urban Roads in the Federal Republic of Germany Using Mix-In-Place Recycling with Cement
Mix-in-Place Recycling with cement stabilization is an economical and environmentally friendly method for the reconstruction of damaged asphalt roads and ways. The most remarkable characteristic of this method is that the entire existing road construction material can be used again for the new road pavement. This essay contains descriptions of...
Study on Quality Control Method for Road Pavement Concrete Using Splitting Strength
The quality control of pavement concrete is carried out with bending strength in Japan. However, the bending strength test requires very heavy specimens of 15xl5x53cm and it is not easy to cariy out loading tests. This paper shows the results of several experiments on the feasibility of using the splitting...
Effect of Geotextile to Improve the Weak Subgrade Soil
The concept of reinforcing pavements and of reinforced earth for improving the bearing capacity of insitu soils both under static and dynamic loading has gained popularity in receriL The word geotextile is now accepted by all civil Engineers to describe the textile used for improving the behavioural (structural) and functional...
Application of High Performance Concretes in Highway and Traflic Infrastructure Construction
High performance concrete - HPC - is characterised by high strength and considerable durability under high service load. In highway construction these concrete is used to constructing and very rapid repairs of pavements, bridges, viaducts and tunnels. Differentiation in types of such objects as well as erection conditions and than...
Retarder Application to Longitudinal Roller Compacted Concrete Pavement Joints
In the case of roller-compacted concrete pavements (RCCP) in spacious site like yard, harbor and so on, socalled fresh joint technique at longitudinal joints is widely used in order to achieve high load-transfer efficiency. However traditional fresh joint technique allowed the limited length of placing, because delay between the fresh...
Modification of Cement Stiffening Time
The stiffening time of cement is a feature whose potential can be better exploited at function of each specific use of concrete. The possibility of control of this feature is useful, as much to get a better concrete performance at function of the each work peculiarities, as to correct behaviour...
New Joints in Rigid Pavement – Highway and Airport
This paper describes a new design of joints in rigid pavement, in this case the angle between joints will be 120 grades in anypoint of the pavement between edges. This new concept about corners angle,change the original work of Westergaard for the "corner load",because it only considerate angles with 90...
Continuously Reinforced Concrete Roadbases
In the Netherlands Rijkswaterstaat is the authority in charge among others of the construction of highways. The department Utrecht of Rijkswaterstaat has chosen a continuously reinforced concrete roadbase for the construction of the 7 km long new highway scction between the cities of Bunnik and I Jtrecht. This choise was...
Concrete Requirements for Ultra-Thin Concrete (Whitetopping) for Flexible Pavements
Whitetopping solutions for old flexible asphalt pavement overlays have been a challange for highway agencies and designers in the recent past years, with special regards to ultra-thin concrete overlays, also called by ultrathin whitetopping (UTW). Considering the needs of full bond between the UTW and the old asphalt concrete (AC)...