The continuously reitifoteed concrete road executed in Monselice (Padua, Italy) is mainly devoted to heavy traffic. During construction works, the road had been fitted with suitably devised equipment to monitor the operating performance over a sufficiently long time period. The present paper is aimed at gathering significant data recorded in...
The Monselice Experimental Road a Performance Analysis After 5 Years Service
Roundabouts with Continuously Reinforced Concrete Pavements
Roundabouts have already been used in Belgium for several years to regulate traffic at major road intersections. The surfaces at roundabouts are particularly subject to tangential stresses that result from centrifugal forces and from the overload on the outside wheels by the more or less significant tilting of the vehicles...
Performance of Thin Concrete Overlays in South South Africa
Since 1970, several highways in South Africa were cujistructed in Portland cement concrete, the only design being used was the jointed unreinforced concrete pavements. Due to early deterioration as a result of alkali aggregate reaction, one section had to be overlayed In order to determine the last option, several experimental...
Vibration Absorbing Concrete Pavements
The evaluation and control of vibrations induced in the environment by the road traffic is a problem of increasing concern mainly in urban areas. Several solutions are under development to define pavement structures capable of absorbing traffic vibrations so to reduce the impact on the environment surrounding the road infrastructure....
The Use of Crushed Concrete Aggregate in Concrete for An Industrial Road at Ouffet
In standard specifications 300 of 1994 (CCT 300) issued by the Ministry of the Walloon Region, permission is granted in the chapter dealing with cement concrete surfaces of roads belonging to roads with light traffic, to replace a maximum of 50 % of the granulates with crushed stones. The aim...
Some Aspects of the Construction of the Azraq to Jafr Highway Project in Jordan
Hot desert environments with low humidity and strong winds provide some of the most difficult conditions in which to build good concrete roads. This paper briefly describes the materials, plant and some of the methods that were used to successfully construct the Azraq to Jafr highway in Jordan where these...
Thin Concrete Overlays on Old Flexible Pavements
Extensive rutting exists on many high volume traffic roads in Sweden. Traditional maintenance means asphalt resurfacing every second or third year. Adding a thin high strength concrete overlay would prolong the service life of the repair due to the high wear resistance of this kind of overlay. To study the...
Concrete Recycling in Belgian Road Construction – Applications in Cement Bound Road Bases and Surfacings
For some years now the interest for the environment together with economic reasons, improvements of crushing plants and the definition of acceptance criteria have led in Belgium to an increased use of crushed concrete aggregate and sand in cement bound bases. Recent official circulars and tender specifications allow for the...
New Drainage Systems for Cement Concrete Road Structures
During a research programme on geocomposite draining materials, the Belgian Road Research Centre constructed and monitored comparative drainage test sections for a concrete block-paved road. The geocomposite drain was easier and quicker to install than the conventional granular drain. Three years of continuous monitoring of weather data, drainage outflows and...
Roller Compacted Concrete as an Efficient Material for Road Pavement Construction
A study has been conducted in order to determine the influence of a wide range of factors on the properties of roller compacted concrete (RCC): coarse aggregate type and content, addition of fly ash, chemical admixtures type and quantity, technologies of manufacturing and compaction, tranportation time and concrete curing. The...
Technological Aspects of Ensuring the Frost and Salt Resistance of Concrete Pavements
The resistance of concrete pavements against frost and salt is ensured by creating the necessary volume of finely-dispersed air voids in the concrete by entraining air during the mixing process with appropriate admixtures. The influence of various structural and technological factors on the stability of entrained air and the formation...
Accelerated Wear Testing of High Strength Concrete in Norway
To give guidelines for the mix design on high performance concrete with high wear resistance, and to study wear of high strength concrete, the Norwegian cement producer NORCEM operates a test rig specially developed for this purpose. The tests show concrete to give 2-3 times the wear resistance of asphalt....