For the year-long approved concrete safety barriers, produced of in-situ concrete or prefabricated units, the new EN 1317 part 1 will discribe the general criterions of the test methods in the future, and part 2 the performance classes and acceptance criteriOns. The opening of the European Market has consequences for...
Reconstruction of Bituminous Paved Rural and Urban Roads in the Federal Republic of Germany Using Mix-In-Place Recycling with Cement
Mix-in-Place Recycling with cement stabilization is an economical and environmentally friendly method for the reconstruction of damaged asphalt roads and ways. The most remarkable characteristic of this method is that the entire existing road construction material can be used again for the new road pavement. This essay contains descriptions of...
Urban and Low Traffic Roads Industrial Pavements
In this paper some roads and industrial pavements where "semi-continuous concrete" was employed are prcscntcd as well as cost and performance under several conditions.
Possibilities of Quality Determination of Concrete Surface Layers
Possibilities of applying methods of surface absorption, mercury intrusion porosimetry, pull-off strength tests and thermal analysis in the assessment of the state of the surface layer of a concrete airport runway are given. The results of the tests of properties of differently deteriorated surface layers of concrete in an airport...
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...
Suitability of Superplasticized Recycled Aggregate Concrete in Road Construction
Piubably, in the years to come, the use of recycled aggregates in concrete may become the need of the day. This is becasue of the nonavailability of natural aggregates in some urban areas. Also, the enviromental laws may force for the closing down of aggregate plants. Apart from this, in...
The Willebroek Ring Road (N16) – a Development in the Construction of Concrete Roads
The Willebroek ring road is part of the N16 Mechelen - St. Niklaas road. The work was carried out in 3 phases, the first phase starting in 1986. In practice, the ring was constructed with 20 cm of continuously reinforced concrete (50.000 m 2 ). Exposed aggregate surface was required...
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...
Verification of the Acting of the Recycled Building Material for the Production of Rigid Pavements in Concrete of Portland Cement
The objective of the present work is the study of the technical viability of the use of refused material of building construction like aggregates for concrete roads. The first stage consisted of the physical characterization of the aggregates obtained through the grinding, followed by a study of the granulometric composition...
Life Cycle Cost of Urban Pavements
This paper attempts an actual analysis of the cycle cost of urban pavements through the discussion of a case study: the City of Buenos Aires, Argentina. Three frequent paving solutions for the local street system are compared: plain concrete and two different asphalt alternatives. Construction, maintenance, reconstruction as well as...
Loading Test on the Surface of Concrete Slabs Cast on Senii-Rigid Base Course
In China, the semi-rigid base materials, with relatively higher strength and modulus, have been widely used in the construction of high-grade roads in the recent decades. However, present specification' for structure design of concrete pavement is based on the results of tests made on the more flexible roadbase. According to...
Renovation of an Apron in Front of a Hangar on Brussels National Airport Using Quick-Setting Concrete
The pavement of the apron on Brussels National Airport, which was constructed in the early sixties, was forming cracks. Given that fragments of concrete could in time be a danger to the aircraft engines, a thorough renovation of the apron was imperative. The distinctive feature of the site is that...