Conf. Paper (EUPAVE)

The concrete construction method is predominantly used in Austria for the high-rank road network (motorways, expressways) with heavy traffic and / or a high percentage of heavy vehicles. Re-cently, concrete pavements are also used in case of low traffic loads (track lanes, concrete paving blocks) and for roundabouts. This contribution...

Depending on the prevailing material and energy prices, concrete roads can be made more cost-effective than asphalt roads. However, to provide a truly sustainable solution, it is necessary to reduce the energy consumption associated with the production and maintenance of concrete roads, as well as to minimise their construction /...

World rice production reaches 662 million tons per year. The husks represent 20% of this amount and when burned, 20% of this byproduct is transformed into rice husk ash (RHA). In general, there is not an environmental management policy concerning this residue. Roller compacted concrete (RCC) is a material which...

The Sevilla – Cádiz motorway was the first one in Spain where a concrete pavement was constructed with a slip-form paver. It was opened to traffic in 1971. Shortly, longitudinal cracks appeared, deemed to the presence of plastic soils in the subgrade. Sometimes these craks were several centimetres wide. It...

Concrete pavements are recycled for paving applications in at least 41 U.S. states and production of recycled concrete aggregate (RCA) in the U.S. currently averages about 140 million tons (127 million metric tons) per year. The primary application of RCA has been subbase materials, but it also has been used...

At present the choice of materials and techniques in road construction is dictated by structural requirements and economical aspects. Ecological factors have gained in importance due to environmental considerations in politics and society. To evaluate the environmental impact of motorways, a life cycle assessment (LCA) according to ISO 14040 was...

During the 1999 spring, two sections of ultra-thin whitetopping (UTW) were built in an urban street at a bus stop within the University of São Paulo campus, over a thin 45 mm asphalt layer. The UTW was constructed, defining two square panels of 0.6 and 1.0 m in size and...

Precast pavement technology is a recently improved construction method that can be used to meet the need for rapid pavement repair and construction. Precast pavement systems are fabricated or assembled off-site, transported to the project site, and installed on a prepared foundation (existing pavement or re-graded foundation). The system components...

Usually pavements for heavy load service are constructed with double reinforced concrete. Mostly their thickness is about 40 cm and – beside the high costs – there are structural problems with the placing and the design of joints, if unwanted cracks and steel corrosion should be avoided. In addi-tion to...

? The behaviour of the cement treated bases was more performant than the "foreseen one for the effective" regulatory scheme, while the one of the ballast was adjusted to this forecast. ? The behaviour of the materials with recycled aggregates was similar to the natural ones regarding their measurements achieved...

Prescriptions for concrete pavements issued by the Spanish Road Administration are included in two types of documents: the Standard for Structural Sections of Pavements (6.1 – IC) and the Specifications for Road and Bridge Works (PG 3). These documents were updated considering the latest advances in materials, construction processes and...

Today, less than 15% of the National Highway System in the United States is comprised of concrete pavement (FHWA, 2007). However, in 1956, at the beginning of the interstate era, the vast majority of primary US routes were concrete roads. Why this significant change in pavement type selected? This paper...