The relative improvement of the economic situation, the growing transport by trucks and the increasing use of containers have created an important need for durable pavements, with very low maintenance cost. Due to the rich Belgian experience with concrete roads, many companies prefer to use concrete for surfacing industrial and...
Reflective Cracking on Concrete Pavements with Cement Treated Sub-Base
One concrete pavement just built was showing some located transverse cracking. In order to evaluate the cracking cause, longitudinal displacements were measured in some cracks and transverse joints. Results obtained showed that concrete cracking was reflected from cement treated base cracks, and allowed to verify that such phenomena happened in...
Cement Concrete Pavement on Granular Base Course of Graduated Concrete-Recycling-Ma Terlal
The hitherto used standard building method using hydraulic bound regulating and base course has been criticised for frequently faiîing. If existing concrete pavements are rehabilitated, the old road structures have to be involved into the new wearing system, so that the required bearing capacity E, ~ 50 Nz'mnr' may be...
Experimental Study of the Strain Modulus of Compacted Concrete
In this paper the results of several experimental studies carried out in order to determine some properties of RCC are described. These properties are important to design and to control RCC pavements: - comparison between strain modulus of different RCC and vibrated concrete mixes whose mechanical strength were similar; proposal...
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...
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...
Dependable Production of Air-Entrained Concrete with High Resistance to Freezing and Thawing in the Presente of De-Icing Salt For Road and Bridge Construction
To ensure that concrete has a high resistance to freezing and thawing it must contain small air voids which are produced by an air-entraining agent and which must be present in sufficient quantities to match the amount of fine mortar. The limits for the air content of unset concrete and...
A Project of Concrete Cycle Tracks in the Region of Hasselt
In spite of numerous cyclists (3.5 millions), until the seventies, the emphasis was in particular on the construction of motor roads and motorways. The cyclist was fairly vulnerable in this environment. From the eighties onward, a new vision appeared in the Flemish region: in and around conurbations, cycle track plans...
Experiences in Non-Destrucfive Testing by Impulse Radar and Impedance Methods in the Evaluation of Concrete High-Ways
The background to the two methods is given; together with their application to concrete pavements. Three case histories are presented where concrete highways have been tested by these techniques in the United Kingdom, some sections having asphalt overlays. The relative merits and disadvantages of the two methods are discussed in...
Performance of Crack & Seat and Saw & Seal Overlays
Maintenance problems in asphalt concrete overlays over portland cement concrete pavements may result from reflection cracking at the location of working joints and cracks in the underlying slab. Two methods of reflection crack control which have been used by many agencies in the United States within the past ten years...
The Use of Roller Compacted Concrete Pavements in Argentina
The use of roller compacted concrete in high-way works started in Argentina in 1986 through a programme developed by the Instituto del Cemento Portland Argentino, ICPA (Argentine Portland Cement Institute). Several sections were designed and constructed in different areas of the country, using traditional laboratory tests, mix proportioning methods and...