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...
The Use of Roller Compacted Concrete Pavements in Argentina
Concrete Structures Made of One Piece Lean Concrete Slabs French Experiments and Pavement Design – Future Developments
France has an extended experience in hydraulic binder treated materials: in semi-rigid structures, in cement concrete thick slabs, in lean concrete for concrete pavement subbase layers. It has permit-ted to establish a new and very competitive struc-ture: the lean concrete thick slab on a drainingcourse with or without tranverse joints.A...
Highway Liquid Sealants a South African Perspective
This paper presents aspects of liquid sealant installation and behaviour in joints in concrete roads under South African con-ditions. It covers joint preparation, installations techniques,quality control and field testing. A description of the generictypes of liquid sealants is given as well as behaviour charac-teristics obtained from laboratory tests which included:...
Improvement of the Road Surface Evenness of a Concrete Pavement by Grinding
Diamond grinding of a new concrete pavement surface produced an improvement on the road sur-face evenness which was evaluated in almost twounits in the International Roughness Index scale(mikm). This improvement was achieved mainlybecause of the removal ofroad irregularities withshort and medium wavelengths (0,5m
Resistance of Concrete Safety Barriers and Concrete Road Against the Scaling Action of Deicing Salts
The paper presents a synthesis of results related to the construc-tion of concrete safety barriers and of a study about the treat-ment of roads in which the strength against deicing salts wastoo low.A survey of the 13 concrete safety barriers after 3 wintersshows that there is a rather good relation...
Appropriate Technology Concrete Pavement Trials in Zimbabwe
In 1985 four trial sections of two-lane concrete pavement were laid in Zimbabwe. The purpose was to provide a data base for the preparation of appropriate design and maintenance specifications, suitable for the conditions found over a large part of Africa, namely, good subgrades, moderate rainfall, large temperature variations, low...
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...
Thin Continuously Reinforced Concrete and Steel Fffire Reinforced Concrete Overlays – Performance Affer Three to Eight Years
Since 1982 experimental sections of thin overlays have been constructed for an amount of 171.000 m'. Eight of these sections are made of 10 to 12 cm thick steel fibre reinforced concrete, six of them on a bituminous underlayer and two on old concrete pavement. Four other sections should verify...
Properties of Roller Compacted and Vibrated Concrete at Early Ages Evaluation Through Ultrasonic Energy Measurements
Measurements of the energy of ultrasonic pulses as a means of establishing the relationship between the structure of material md its properties, have bcen studied during a long period of .ime in the Torroja Institute. Energy quantification of the pulse does consider all the characteristics of wave and materials. This...
5th International Symposium on Concrete Roads 1986 Aachen Germany
Closing ceremony from 5th International Symposium on Concrete Roads 1986 Aachen Germany
5th International Symposium on Concrete Roads 1986 Aachen Germany
Indexes, General Reports and Additional Contributions from 5th International Symposium on Concrete Roads 1986 Aachen Germany
5th International Symposium on Concrete Roads 1986 Aachen Germany
Index of Papers and Opening from Addresses from the 5th International Symposium on Concrete Roads 1986 Aachen Germany