Serviceability of the concretes that undergo such effects of repetition of freezing-thaw is greatly affected by water-cement ratio, permeability, composition of the cement and mineral additves. Water-cement ratio being between 0.40-0.50, the concrete having a structure without any voids, using a cement with mineral additives, increase the resistance of the...
Durability of Concrete Roads with Blended Cements
The study was conducted to bring out the salient features of blended cements, which go a long way in establishing the durability of rigid pavements. Blended cements not only enhance the life cycle of concrete road by protecting it from chloride and sulfate attack but also reduce the thermal cracking,...
Accelelated Loading Test of Porous Cement Concrete Pavement to Evaluate Durability and Permeability
This paper presents results of study on evaluating durability and permeability of porous cement concrete pavement by accelerated loading test at PWRI pavement test track. The following procedure was conducted to evaluate the durability and permeability of porous cement concrete pavement. Three test sections were constructed in 1997. These sections...
Pavement Design Procedures for New Construction and Rehabilitation with Overlay
The first part of the paper deals with the designing of rigid pavements by means of FEM. The NE10-SOILIN program uses the NE-10 finite elements composed of subelement 2D NE-10-M (tetragonal element), subelement 3D NE-I013RJCK and subsoil element. It models the Midlins slab placed on a generally multilayer structure. Under...
Technical Conditions for Completely Using the Advantages of Concrete Pavements
It is immanent for concrete pavements not to get plastic deformations and therefore concrete pavements are especially suitable for heavy traffic roads. However, pavement performance depends from avoiding of some structural faults.
Use of Fast Track Concrete Paving for Restoration Work
Many roads in Belgium, both main and secondary, are in need of modernisation or repairs. The surface area of old concrete pavements that are thus concerned on an annual basis is estimated at approximately half a million m2 . The inconvenience to the user caused by this type of work...
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...
Sand-Concrete Pavements Gainful Use of Local Materials
To complete the road between La Teste town and the famous , the Gironde Regional Council use the knowledge and experience requied during the national research and development project on sand concrete named SABLOCRETE to build a sand concrete slab pavement structure along 3,5 kilometres. The owners and engineers of...
Analysis of the Response of Concrete Pavement Slabs Jointed by Dowel Bars
The present paper aims to contribute to the study of the structural response of concrete slabs jointed by dowel bars in pavements. As is known, a common construction technique of pavements is this one that uses concrete slabs interconnected each other in both directions by equidistant dowel steel bars. A...
Hydraulic Concrete Roadways on the Autopista Del Mediterraneo Appraisal and Management
This paper addresses the appraisal and management procedure used for more than 20 years by a toll motorway concessionaire, covering a total of 300 kilometres of concrete dual carriageway built between 1970 and 1985. The system of analysis, surveys and experiments carried out during this period was based on auscultations...
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...
Jointed Concrete Pavement Structural Evaluation Overlays Design
In connection with a rehabilitation project, the long-term performances of 15km existing old jointed pavement were comprehensively surveyed. The collected data included visual conditions, roughness measurements, core tests, and FWD defleLtions. By analyzing the FWD measurements, the in situ struchiral moduli were backcalculated, and then, the fatigue damage of existing...