According to the findings made on French road network about .helow skidding resistance, GAILLEDRAT Pére & Fils com-rany developed a new surface treatment concept: THE SUR-:;'ACESHOTBLASTING.l'his technique which allows to treat most of the slippery road.urface problems on asphalt or concrete pavements. permits toncrease the surface roughness "as requested" and...
Characterization by Means of Some Fracture Mechanics Parameters of the Concrete Pavement of the By-Pass Between Al and A2 Italian Highway
This work reports the results obtained with the three point bend tests (TPBT) carried out on beams made up of the concrete used for the construction of a by-pass highway and, by comparison, of medium (50 N/mm2) and high strength (98 N/mm 2) laboratory concretes. Typical parameters of fracture mechanics,...
Payement Management For Concrete Pavements
The Illinois interstate highway network includes over 1700 centerline miles of jointed concrete and continuously reinforced concrete pavements. The pavements were constructed beginning in the 1950's through the 1980's and represent a wide range in designs and traffic loadings. This large highway network is now requiring extensive rehabilitation work as...
Specific Deterioration of Construction Joints in Continuously Reinforced Concrete Pavements_ Under Very Hot Weather Conditions
Generally due to an unsufficient vibration, the concrete around the construction joints may contain cavities, especially under the reinforcement. When very hot weather conditions prevail, these deficiencies may cause important deteriorations, possibly with mere fragmentation of the concrete around the joint. As there are over 5.000 construction joints on the...
Rigid Pavement Rehabilitation Techniques in Canada
The rehabilitation of portland cement concrete (PCC) pavements on high volume freeways have always posed a challenge. In the summer of 1989, the Ministry of Transportation of the Province of Ontario (MTO), Canada, accepted the unique challenge to rehabilitate one such freeway using various PCC pavement repair techniques in one...
Roller Compacted Concrete For Pavements in Military Areas Within the Federal Republic of Germany
Roller Compacted Concrete Pavements have been constructed on six US Forces military installations within the Federal Republic of Germany (FRG). These RCC pavements will be used as hardstands supporting either wheeled or tracked vehicles. RCC hardstands within the FRG have saved as much as 22 % of the construction cost...
Considerations in the Design of Jointed Concrete Pavements
This paper provides considerations, recommendations, and guidelines on the design of jointed concrete pavements. These are based on the field performance results of 95 inservice con-crete pavement sections, on the results of a literature review,and on the experience of the authors. Key considerations in thedesign of concrete pavements are highlighted...
Concrete Paving in the UK One Contractors Experience and Approach Since 1983
dfred McAlpine Construction Ltd have constructed 20 kilometres of concrete carriageway using slipform pavers; 00 kilometres of which have been completed since 1983. This aper sets out the philosophy and experience of this firm with egard to the construction since 1983. It highlights the decision laking processes undergone at tender...
Design of Sand-Cement Base Courses Using Fracture Mechanics Principles
Sand-cement base courses exhibit shrinkage and fatigue crack-ing. Both types of cracks tend to reflect through the asphaltictop layers. An analysis has been made to determine pavementlife, which is defmed as the number of cycles until cracks arevisible at the pavement surface, by taking into account fatiguecrack initiation, propagation and...
Porous Urban Pavements in Cement Concrete
Questions regarding the environment are being particularly felt in certain countries, and noise con-trol requirements have led to the development ofthin free draining materials able to limit tirepavement contact noise.We shallbe dealingherenotwith a thin free draining pavement structure, butwith a porous concrete pavement of 40 cm thick-ness. Theoretical studies have...
Superplasticised Concrete For Urban Paving
Concrete made with a superplasticiser has been used in Germany in the field of paving since the middle of the seventies. If these concretes of high workability show a high strength at a young age, they are called high early strength. These concretes can be subjected to high loading on...
Ultrasonic Method in Concrete Road Testing
To determine the concrete strength in road surface the authors have applied an ultrasonic method. In this method ultrasonic transducers are imposed to the upper surface of the pavement slab. The distance between the transducers is constant. Next propagation time of longitudinal ultrasonic wave is measured. The time of propagation...