Research is carried out in the Magnel Laboratory - Ghent University into the properties of road concrete with a very porous structure, enriched with polymer emulsions. The aim of the tests is to optimise the composition of the porous concrete. In this context, the choice of the type of polymer...
Fibre Reinforced Concrete Roads Surfaced with Concrete Paving Stones
The paper describes enhanced specifications for concrete block roads suitable for heavy channelised traffic in city centres. It describes two case studies and shows how bedding sand and fibre reinforced concrete roadbases can be specified to ensure zero rutting and a cost effective solution.
Concrete Road Design a Special Urban Solution
Theme: in 1994 a rigid pavement solution was implemented on the underpass of the National Road n° 107 crossing the National Road nu 12, in the ambit of the remodelling project of the concerning cross-road roundabout, situated in the periphery of the city of Porto, involving only one extension of...
Consideration of Some Factors Affecting the Competitiveness and Potential for Future Use of Concrete Roads in the UK
Although concrete roads have traditionally been used in the construction of a small part of the UK network, there is continuing interest in the potential for concrete pavements. Consideration of the way in which whole life cost (WLC) may influence selection of the most competitive form of concrete structure when...
A Contribution to Concrete Pavement Analysis
The concrete pavement structure consisting of the M40 concrete slab 160 to 240 mm in thickness and the cement-stabilized base course (CSB) 150 to 250 mm in thickness, is analyzed in the paper. The pavement slab is not reinforced and the spacing between expansion joints was selected in such a...
The Use of Slipform Technique for Traffic Infrastructure Constructions
Slipform technique can be used for construction of concrete pavements for roads, but also for construction of aircraft movement areas, industrial surfaces, secondary traffic areas, and rigid railtrack systems made of conciele. Slipform technique can be used for construction of concrete safety barriers, cable troughs, curbs or gutters, too. If...
Bending Fatigue Properties of Concrete Pavements with Recycled Aggregates
This report presents the experimental studies on the bending fatigue properties of normally cast concrete and roller compacted concrete mixed with recycled aggregates produced from concrete waste and on the applicability of this concrete to pavement. The present studies provides the following principal conclusions. (1)Recycled aggregate can be used as...
K-Values of Fly Ash Concrete of Equal Low Slump
The paper presents a general principle for the determination of the k-values for fly ash concrete and the results obtained on concretes with cement contents of 200, 300 and 400 kg/rn 3, fly ash cement ratios of 11%, 25%, 43%, 67% and 100% and equal slump of 30 mm. The...
Erosion of Cement Treated Subbases Below Concrete Pavements
Laboratory tests have been carried out to examine the effect of the following parameters on the erosion behaviour in the case of cement treated subbases (CTB) below concrete pavements: aggregate mixture (gravel or sand), treatment (with wet treatment, without treatment), compressive strength requirement (varying cement content), arrangement of a geotextile...
Study of a Romanian Experimental CRCP Road Section
The experimental continuously reinforced concrete (C. R. C. P.) road section has been realized in 1975 on a Romanian principal road, in a mountain area. There are presented the design method, the materials, the technology and the behavior after twenty years of traffic.
Reconstruction of Urban Highways
Due to the ever increasing traffic volumes, the repair of concrete pavements has become one of the most difficult problems. One of the means to help resolve this problem is the use of a high early strength concrete. At the Department of Civil Engineering of the K.U.Leuven a research program...
Whitetoppings – Long Term Performance and Recommendations
Field tests have been carried out with thin, high strength concrete overlays (whitetoppings) placed on top of the milled asphalt pavement The aim is to find methods to restore rutted asphalt pavements and iliclease their rutting resistance. The whitetopping was limited to 70 mm. Both plain and steel fibre reinforced...