Two different pavement structures as part of one and the same transverse profile, or a specific treatment for a slow lane extremely liable to rutting.
The Reconstruction of a Special Lane in Continuously Reinforced Concrete For Slow Vehicles on the A6 Along the Mountain Pass of Bessey En Chaume
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...
Ways of Reducing Tire-Noise on Concrete Pavements Experience and Tests in Austria
Tire-road noise can be reduced considerably by providing a suitable surface geometry. According to the new Austrian specifications pa-vers must be fitted with a longitudinal smootherto eliminate any transverse waves produced by thebeams of the paver. In order to obtain a noise-reducing surface a longitudinal texture (e.g.. a burlap drag)...
Problems of the Reconstruction of Motorways in the Gdr
The 1860 kilometre GDR motorway network was mainly built in concrete slab construction before 1945. Its overall reconstruction is vital. In the course of reconstruction work a number of different paving variants were put into practice. The covering of unbound and nearly impermeable bases needed the drainage of the intermediate...
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:...
Materials Used in the Experimental Field in La Guardia Toledo For Marking Roads in Concrete Pavements
lith the aim to verify the suitability of the different materials sed in marking roads for concrete pavements, more than 30 ommercial products were tested on the experimental field. Iaterials were of different nature: based on alkyd resins, vinyl .sins, alkyd-chlorinated rubber, chlorinated rubber, acrylic sins, etc. efore the application,...
Traffic Management Layouts with Improved Capacity For Major Roadworks Narrow Lanes and Tidal Flow Operations
The layout commonly used at major motorway sites in the United Kingdom is the full contra-flow, which carries two traffic lanes in each direction on one carriageway, releasing the other carriageway for reconstruction. To improve operational efficiency, two adaptations of this layout, which operate with a reversible (or tidal) lane,...
Correlation Between Research and Construction of Concrete Roads
During the past two decades, the practice-oriented research work done when concrete roads are built has lead to further development of slab construc-tion, to new solutions to individual constructio-nal problems, and to development of new cons-tructional methods. Based on existing research re-sults, more reliable statements can be made on thedegree...
The Influence of Size and Hardness of Sand Particles and their Proportions on the Skid Resistance of Cement Mortars
irnestone and emery sands divided into 6 fractions, were used ,cast cement mortar specimens in PSV moulds. After 28-day ater curing the specimens were subjected to accelerated ilishing and their Skid Resistance Value (SRV) was measured ith the pendulum tester. Specimens of 100 % limestone or )0 % emery sand,...
Developments in Australian RCC
Australia has now over three years of experience in the use of high strength RCC in pavements with over 40 projects completed. Whilst the majority of Australian projects have been relatively small in comparison to American and European experience, nevertheless they have enabled a continued development of design, construction and...
Lean Concrete Hard Shoulders Alongside Continuous Reinforced Concrete Overlays
Today, the great majority of Emergency Hard shoulders on Continuous Reinforced Concrete Pavement Motorways of the French network are build with full thickness lean concrete. The principle of this process (background, drainage, laying, seals, surface treatment, concrete formulas) are described below.
Road Marking on Concrete Problems and Solutions
R.oadpaint containing a dissolving agent and hot applied ther-noplastic marking materials are most commonly used for roadnarking in the Netherlands. The only marking materials al-lowed on Dutch motorways are those that have proven theirsuitability in laboratory research and experimental sections on:he road. During a period of 25 years no concrete...