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...
Experimental Study of the Strain Modulus of Compacted Concrete
New Concrete Pavement Structures in the Revision of the French Catalogue of New Pavements and in the Technical Guide of Overlays
The documents for conception and design of new and reinforcement works on the French national road network were updated in 1988to take into account new pavement designs and techniques: dowelled slabs, continuously reinforced concrete, thick slabs on porous course, cement processed materials subbases. The article explains: - the development of...
Concrete Continuously Reinforced with Flat_ Slotted_ Galvanised Steel Strips. Experience of FLEXARM Reinforcements. French Road Network 1986-1989
The dream of concrete pavement constructors, to replace the conventional difficult-to-fix reinforce-ments, which require a considerable manual work-force, with a continuous bobbin-wound reinforce-ment, has today become a reality. The chosensolution was a weldable carbon steel, with an elas-ticlimitgreater than 700MPA, a rectangular cross-section 40 mm x 2 mm, slotted for...
Pavements with Industrial By-Products Technological Environmental and Constructive Aspects
Recyclingmaterials and industrial by-products are suitable for building purposes if the constructions made of them adequately withstand all loads occuring during the scheduled period of utilization and if they do not affect the environment unac-ceptably. Therefore the evaluation of recycling-and secondary materials must cover both the cons-tructional and the ecological...
Cements For Concrete Pavements Mixed Cement Or Type V with Fly Ash
In Spain the development of cement, specially for concrete pavements, has been based on making use of fly ash in cement production. Such a development was achieved after studying the characteristics of the available fly ash and the respective experiencies. The results led to a widespread use of this type...
Concrete Setis a Functional and Rational Technique
The use of concrete setts in France has been growing for a decade, especially on urban roads. This technique, inspired by stone setts, but also by such precast concrete products as kerbs and gutters, very quickly generated needs: for design methods, for standardization of the product, for rules for use....
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...
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...
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