In the quest for introducing materials and techniques of construction, the Research & Development Division of the Road Development Authority, Sri Lanka has carried out several trials and successfully constructed an airport apron, a causeway of 2km length using Roller Compacted Concrete (RCC) pavements and a road of length 0.265km....
Use of Roller Compacted Concrete in Road and Airport Pavement Construction in Sri Lanka
The Importance of Continuous Slab Support and Load Transfer at Joints in the Performance of Thin Concrete Overlays
Studies on the structural performance of existing Portland cement concrete roads in South Africa (1) have shown that the traffic utilizing these roads is not the pnme initiator of structural failures. Factors such as construction, environment and slab support conditions are predominant in initiating structural failures. However, it is also...
New Composite Cement for High Early Strength Concrete
Even small repairs on roads and runways are time consuming and lead to long time obstructions. Normal cement type mortars and concretes do exhibit iallier long hardening times and are therefore, not suitable for fast track repair. Non cementitious repair materials like resin types have other disadvantages as being only...
A New Geometry of Airport Concrete Pavements
A New Geometry of Airport Concrete Pavements
The Proposed European Standard for Concrete Pavements
This paper describes the present situation of the European Standards for Concrete Pavements. They are currently in prcparation by a Working Group created within the framework of Technical Committee CEN TC 227 "Road materials". Since many of the specifications for concrete and its constituents (cement, water, aggregates, admixtures) are covered...
Method to Establish the Porosity – Depth Distribution of Porous Concrete Pavements Using Cylindrical 100 Cml Cores Samples
The paper deals with a low cost method to establish the porosity - depth distribution in porous concrete pavement using cylindrical 100cm cores samples. The outcome is a graph representing the porosity in function of the depth below the surface. The method is non destructive with regard to the core...
Continuos Reinforced Concrete Pavement for a Roundabout on Foam-Concrete Foundation
The work was undertaken by contractors Ooms Avenhorn. Work took place in the months of July, August, September and October 1995. The roundabout was opened for traffic on 6I October 1995 (photo 6). More than two years after opening of the roundabout and the road metalling associated with it, it...
Pre-Evaluation of Hydro-Demolished Concrete Surfaces by Dulled Core Testing
The paper contains investigations of concrete debris generated during the compression testing of drilled cores and during hydrodemolition, l3ased on sieve analyses, average diameters of the debris samples are estimated. It is found that a fairly linear relation exists between the average size of the debris generated during the compressive...
Elimination of Ruts at Intersections by Means of An Inlay/Overlay Made of Steel Fibre Concrete
To the North of Gent there is an important harbour and industrial zone. Because of the heavy traffic on the road connecting Gent and Zelzate (R4, section J. Kennedylaan), deep ruts have formed in the asphalt pavement, mainly at the junctions. In order to repair these ruts in a durable...
The Behavior of Concrete Block Pavements
In 1981 to 1985 and 1993/94 static and dynamic tests on block pavements were carried out on a 1:1 scale at the professorship of Road Construction at the Technical University of Dresden. The pavements were loaded with a plate bearing test equipment (approx. 0.7 N/mm 2) with a static stress...
The Use of Nuclear Gauges on Concrete Roads Under Construction
To ensure the satisfactory performance of rigid pavements, it is necessary to control the air content of the concrete slabs. The aim is to maintain a prescribed quantity of cntraincd air in surface slabs to rcducc frost damage. Also, it is required to minimise the quantity of air, which results...
Road Cement Concrete with Lime Aggregate
The use of local aggregates of limestone nature for the producing of road cement concrete leads to obtaining numerous technical - economic advantages. Romania owns great limestone resources (over 3 milliards tons with an ensurance degree up to 999 years) smoothly spread over the entire surface of the country. In...