and to secure the height position of the individual slabs. They must be positioned in the middle of the slab thickness so that they do not prevent longitudinal motion of the slabs. In modern concrete pavement construction the concrete is poured over the entire cross section width using slip form...
Measuring Device For Determining Dowel Positions on Concrete Slabs
Comparative Investigation on Concrete Pavement Thickness Using Industrial Waste Chips, Steel Fiber and Silica Fume
Application of steel fiber in concrete would increase modul of rapture (MR) and module of elasticity (E), which in turn decrease slab thickness in rigid pavements. Hence, damaging stresses due to thermal and moisture is reduced. Where as concrete mixes with Silica Fume (SF) would perform the same behavior with...
Rapid Replacement of Deteriorated Concrete Slabs Under Traffic
In the course of utilization the utility value and condition of concrete pavements decreases due to traffic and environmental burden. Their utility value is judged by edge/corner demolitions, settlements, horizontal movements and the overall condition. In case of damage individual slabs must be replaced. The aim of this study is...
The Use of Statistical Experimental Design to Investigate the Autoclave Curing and Standard Curing of Cement
28 day compressive strength of Portland cement mortar was investigated for standard curing and for autoclave curing. The effects of %C3S, %SO3 and Blaine on strength development in both curing methods are compared via the use of statistical experimental design techniques. Box-Behnken response surface methodology was adopted to create a...
Analysis of Cracking Mechanisms in Concrete Pavements and Related Recommendations For Pavement Construction
In addition to the stresses caused by traffic loads concrete highway pavements may be subjected to considerable stresses due to environmental action effects and other related damaging mechanisms such as early age shrinkage, loss or absorption of moisture, temperature induced strain gradients and in some instances also alkali-silicareactions. Due to...
The Effect of Moist Curing on the Properties of Concretes Made by Pozzolanic Cements
The strength development and permeability properties of two concretes prepared with natural pozzolanic cements, Trass Cement (TC) and Blended Cement (BC), were investigated and compared with those of an Ordinary Portland Cement (PC) concrete under varying water-curing periods. The mix design of concretes was made with an equal strength base...
Surface Platforms For Public Transport New Perspectives: the Case of Cement Concrete
As a result of Urban Travel Plans implemented in major cities, public transport is being favoured as a convenient means of travel and mobility by all. Platforms (road- and trackbeds) designed for public transport must offer quality from the technical standpoint in order to handle channelled loads or the insertion...
Manufacture and Use of Precast Elements for the Construction of Traffic Calming Devices
In recent years, the proliferation of safety devices, the absence of legislation in the matter and the problems encountered in terms of the stability, efficiency and durability of these devices have resulted in the experimental manufacture of precast elements for the construction of road humps and plateaus. At the current...
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...