This paper describes the studies, reports and experimental sections related to this new type of pavement, not conventional, composed of a thin concrete layer, but with a steel reinforcement, in sufficient quantity to resist the traffic loads. The description goes back to the first studies and tests carried out inthe...
Various Construction Techniques in North America_ Asia and Europe Economic Construction with Roller-Compacted Concrete
Clients and contractors all over the world are aiming to reduce construction cost by using less expensive construction material and applying new, more economic construction methods. This is a continuous challenge to the manufacturers of construction machinery to modify existing machines or develop new ones to meet the contractor's requirements....
Design Practice of Concrete Pavements in China
A brief review of China's practice on structural design of concrete pavements is presented. The designmethodology adopted controls the combined fatigue damage due to repeated traffic loading and fluctuating temperature gradient, and solves the loading and thermal warping stresses by using the finite element method, based on a mechanistic mo-del...
The Use of Urban Solid Waste Slags in Soil Cement and Cement Bound Granular Materials
Researchers and Technicians have ascertained that the use of ppropriate substitution materials in cement stabilizations and nixtures during the construction of road-base, sub-base and oundation layers allows to simultaneously fulfill technical-tructural, economical and environmental-ecological require-nents,~s an alternative by-product, Urban Solid Waste Ashes and:lags have been tested in a laboratory in...
Measurements of Noise Caused by Tyre Friction on Different Test Roads
This report isabout various tests concerning noise caused by tyre-friction on various surface textu-res: on old and new concrete roads as well as ona rough, uneven surface.In this connection the influence of the various sur-face textures on the development of the noisecaused by tyre-friction is explained.Through these tests it could...
The Use of Seismic Tests to Assess the Properties of Portland Cement Concrete During Curing
«In situ» measurements of surface wavevelocityon two prototype concrete slabs indicate that seismic measurements offer a reliable alternative to con-ventional penetration resistance and cylinder com-pression tests for determining the stiffness of Port-land cement concrete during curing. The surfacewave velocity was determined using a nondestruc-tiveand nonintrusive technique called the SpectralAnalysis of...
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...
Load Transfer Restoration LCPC Freyssinet Connector
The LCPCIFREYSSINET slab connector is an innovating device allowing load transfer restauration of concrete roads submitted to pumping effects. It is constittïed by two synietrical half-shells in cast iron glued to a central elastomeric pad and contains an adjusted steel-pin which slides freely within housings machined in the shells, making...
Widening of Concrete Roads with Porous Concrete Bases
This paper assesses the condition of a concrete motorway pavement in the Paris region to be widened from three to four lanes from the outside. The sigilificant drainage requirements of the existing pavement led to the provision of a new porous pavement. The design criteria applied for the typical crosssection...
Experience with Rolled Concrete For Traffic Areas in the Federal Republic of Germany
Traffic areas are being executed to an increasing degree with roller compacted concrete. This concerns a concrete which is transported with earth-moving equipment, installed and compacted. To gather experience on concrete technology, test fields were laid. Furthermore, within the framework of a quality assurance program, comprehensive tests were performed on...
Assessment of Piarc Recommendation on the Combatting of Pump Inc in Concrete Pavements
Within the PIARC Concrete Roads Technical Committee,ninecountrieshaveworkedout a common platform of recommendations for improving the longterm performance of concrete pavements by implementing appropriate design provisions, draining of interface infiltration water, use of low-erodability subbase materials, optimized drainage,and surface waterproofing. Some countries hadalready applied all or part of these design provi-sions...
Cement Grouted Macadam
Cementgrouted macadam (CM) is a 150-200 mm thick baselayer of macadam, 32-65 mm, which is stabilized to full homogeneity with a cement-slurry composed by cement, sand, flyash, air-entrainer, a superplasticizer and water. The cement-slurry is spread out by a especially equipped caterpillar-tracked asphalt-paver.