Resources

The main difference between pavements and other elements made of concrete is the surface property. The surface in concrete pavement must be finished properly. It has been known for a long time that air-entrainment can be used against freezing and thawing deterioration of concrete pavement slabs. In the freeze-thaw attack,...

Artificial paving blocks made with portland cement concrete are widespread in many countries. These paving blocks come in various designs such as Interlocking and Italian Flower, and they are produced in special machinery out of rather high quality concrete having about 50 MPa compressive strength. The reason for the concrete...

In this paper, portland cement concretes and concretes with blast furnace slag cement were studied to determine the parameters for strength and chloride permeability under different curing procedures. For this purpose, four concrete mixtures were made at two different water cement ratios of 0.45 and 0.65 with cement contents of...

Although roller compacted concrete (RCC) made with and without fly ash (FA) has enjoyed numerous application of dams, roads and large floors construction in Europe, Japan, Australia and Unites States since 1970s, it has not almost yet been used at all in Turkey despite abundant and economical sources of FA...

The use of screenings of igneous rocks containing the dust-like particles (not more than 10% by weight) extends the list of efficient aggregates for the pavement concretes. The peculiarities of the grain size distribution of screenings, namely, an increased content (up to 10% and over) of dust-like particles and specific...

World practice (USA, Germany) has already noted the cases of continuous cracking of the surface layers of cement concrete pavements. Continuous cracking becomes evident several years later after completing construction and results, as a rule, in deterioration of the performance characteristics of the pavements. The paper shows the results of...

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...

For the present Polish Catalogue of Typical Concrete Pavements is published. This document allows to apply cements CEM II and CEM III besides CEM I in road constructions. In order to verification of usefulness these cements, the experiment concrete pavement with CEM II and CEM III and for comparison CEM...

Due to severe frost damage at the main platform on a military transportation airfield in the Netherlands, investigations have been carried out to find the course of this damage. Tests have been carried out to compare the frost sensitivity of Portland cement and Fly-ash cement. Also the influence of several...

In Western Europe the demand for a crack-free structure is not uncommon. Due to environmental reasons more and more (concrete) structures are built to prevent toxic liquids from leakage trough the structure to the subsoil and groundwater. These structures can be found for instance in the chemical industry, petrol stations,...

The porous concrete surface and sub-base for pavements is required higher coefficient of permeability than 0.01cm/sec and higher bending strength than 3 or 4.5 N/mm2. In order to obtain workability and these qualities, suitable methods for testing consistency was investigated. It was possible to judge the consistency for quality control...

This paper is based on a research project, which has covered the importance of high range water-reducers (HRWR) on properties and consequently on quality of concrete. More precisely deals with the influence of six HRWR of an amount of twelve which were tested. They have been prepared concrete mixes with...