rFor the reconstruction of the E31 3 motorway which was constructed with concrete slabs round about 1960, CRCP was chosen and since 1983 the exposed aggregate technique was applied there. As the conventional exposed aggregate concrete is still too noisy, in 1992 it was decided to pursue the reconstruction works...
Design and Construction of a Concrete Pavement on Compressible Muds
This paper deals with the design, construction and performance of a freeway section over a thick layer of compressible mud. Halfway on the Madrid to Zaragoza freeway, in the valley of the Jalón River, several very soft clayey deposits were found, originated by endorreic drainage basins. The ground treatment systems...
Concrete Pavements in Seasonal Frost Conditions – Finnish Experience of the Durability and Economy of a Concrete Pavement Built in 1990 in Northern Finland
Oulu is a city of about 145,000 inhabitants including its suburban area located in northern Finland where the winter can be very cold. The freezing index is about 40,000 °C h (once in 10 years) and the frost penetration depth can be about 2 m or rluuue. lii 1990, 4...
Application of One Day Concrete for Pavements
In order to shorten the construction periods of concrete structures, PWRI and four cement manufacturers carried out a joint research to develop 5 new types of one-day concrete with the following requirements: The compressive strength of the concrete shall be 30 N/mm 2 or more one day after mixing as...
The Utilization of Tarbearing Scarified Road Materials with Special Hydraulic Binders
The utilization of tarbearing scarified road materials, which are charged with phenols and polycyclic aromatic hydrocarbon (PAH) to a considerable extent, is becoming a problem of increasing urgency in Germany. This paper deals with the consolidation of tarbearing scarified road materials with a special hydraulic binder, which due to its...
First Experimental Application of Deactivated Coloured Concrete in Belgian Road Construction
Deactivated coloured concrete is characterized mainly by two factors: its colouring and its surface treatment. Colouring is achieved by using preferable coloured aggregates and admixing the mortar with a dye. The surface treatment consists of chemical aggregate exposure. A first major experiment in Belgium combining coloured concrete and chemical aggregate...
A New Mix Design Methodology for Roller Compacted Concrete, with Case Studies
A new mix design methodology for roller compacted concrete (RCC) is described that involves preparing low and high density specimens at various (typically three) cement contents. For each specimen density is determined. Strengths (compressive and/or split tensile) are measured at various intervals (e.g., 1, 4, 7 and 28 days). Multiple...
Mix Design for Concrete Pavements Durability Options Based on the New European and Italian Standards
The provisions of the European Prestandard ENV 206 "Concrete - Performance, Production, Placing and Compliance Criteria" place the accent on the qualitative requirements (physical, chemical and mechanical ones) of a durable road concrete. The theoretical life of a rigid road pavement obviously r1.pends on the design and the quality control...
Concrete Slab Tracks for Railways
Due to the planning and construction of new high speed railways, the development and testing of the ballastless tracks, which started in Germany in the seventies, is now turning up again. The use of this almost mairitenailce free structure requires the assessment of the multi-layer system. For the slab track...
Reducing Traffic Noise on Cement Concrete Pavements
This paper concerns a joint research programme being undertaken by the Roads and Traffic Authority of New South Wales (Australia) and the Cement and Concrete Association of Australia. The objective of the research is to develop quieter concrete road surfaces, whilst maintaining acceptable skid resistance, by modifying the surface texture...
The Influence of the Interface Friction Coefficient on Composite Concrete Pavement Performance
The paper discusses the role of non-destructive testing in pavement evaluation and the importance of bonding between its layers on back-calculated properties. Rigid composite pavement structures were analysed using the BISAR programme under different bonding coefficients (ks) between the asphalt and the concrete layers. The results indicate that: A small...
The Economy of Concrete Pavements in Finland – Finnish Method for Life Cycle Cost Analysis between Asphalt and Concrete Pavements
A cost comparison between different pavement types is based on the current value of the construction and maintenance costs and the annual costs of the road during its service life. A detailed technical-economic comparison between asphalt and concrete pavements should always be made when the ADT of the road >...