Testing the behaviour of different pavement materials under repeated application of loads has been recognized as very essential to predict the performance of pavements. Most of the methodologies /equipments used to carry out such tests involve huge sums of money both in terms of initial investment and recurring expenditure. Also,...
A Low Cost Equipment For Accelerated Testing of Pavement Materials
The PIARC Guideline on in Situ Recycling of Pavements with Cement
Recycling techniques to take profit of materials from existing pavements are being increasingly used, due to different technical, economical and ecological reasons. Therefore, the Technical Committee C7/8 on Pavements of PIARC (World Road Association) has prepared three guidelines dealing respectively with hot recycling in plant of bituminous mixt ures cold...
Cement Containing Granulated Blast Furnace Slag in Local Roads Building
The number of roads with concrete surface in Poland is small. During the last few years the cement industry has taken up extensive promoting activities that resulted in increased interest in construction of concrete roads both motorways as well as local roads. It has turned out that durability of...
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...
Reconstruction of Concrete Roads Using Recycled Sand as Aggregate
In the domain of road building, recycled aggregate made from old concrete road pavings has been used in the construction of new concrete pavings for quite some time. Generally only the coarse fractions of more than 4 or 2 mm, respectively, are used as recycled material. Most of the recycled...
Roller Compacted Concrete Pavement Using Recycled Concrete Aggregate
Usage of recycled concrete aggregates produced from crushed demolished concrete has been limited due to its higher cost and the difficulty caused from its major ingredients, cement mortar, and by-product powder. However, the exhaustion of aggregate resources and increase demand of preserving the natural environment require developing an effective application...
First Experience of Noise-Reducing Exposed Small Aggregate Concrete Surfaces in Japan
In Nagoya, Japan, for a national highway having a large-scale common duct set under the road, concrete pavement with transverse brooming has been adopted in order to ensure structurally durable pavements. However, because these roads are located in an urban area, demand for less noisy pavements has increased. Therefore, in...
Pharmaceutical Waste
Studies are being carried out on the influence of pharmaceutical waste at the Ukrainian University of Transportation, a especially the liquid waste on the physicomechanical 3roperties of cement concrete
High-Quality Concrete with Recycled Aggregates
New laboratory and field investigations showed that it is possible to achieve durable concrete by using recycled aggregate above 4 mm from old pavements with cracks but no frost- or concrete structure deterioration. The concrete compressive and tensile strengths were slightly higher and the cracking sensitivity was slightly lower for...
Influence of Temperature During Curing on Stresses in Concrete Pavements
In concrete pavement placed during hot weather unfavourable Lelilpelatuies Lall causc high stresses and therefore the formation of cracks. In pavements which are placed in the morning of a hot summer day, after a few hours very high temperatures at the surface and still low temperatures at the bottom of...
Environmental Impact of Concrete and Asphalt Pavements
As part of a Nordic R & D project on sustainable concrete technology initiated by the Nordic cement industry, a study has been carried out by VTT, the Technical Research Centre of Finland, to assess the environmental impact of concrete and asphalt pavements. The assessment is based on the estimation...
Sand-Rich Concrete – An Alternative to Ordinary Concrete
The natural raw materials gravel and sand are worldwide mined on a large scale. In many areas of Germany natural resources contain 70 % (and more) sand and less than 30 % gravel. Therefore in particular very fine sand often cannot be used and must be stored in waste disposal...