Prefabricated Concrete in the Service of Urban Development

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The needs of road managers cover a number of sometimes conflicting aspects, which have to be reconciled. These relate to the durability of the works, their flexibility of use and reuse, their ease of maintenance and of course their long term cost. They also relate to the safety of the...

High Performance Concrete Effects of Curing Conditions

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The use of high performance concrete (HPC) is becoming more popular in the United States. Many State Departments of Transportation are replacing conventional concrete especially with HPC bridge decks. Despite the growing popularity of the material, little is known on the effect of the available curing methods on the mechanical...

Road Marking on Concrete Roads

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On several of the concrete roads that were constructed in Sweden during the 1990s problems have been experienced in making the road marking compound adhere to the road surface. The problem would appear to be greatest during the first few years. In earlier studies, the problem was analysed by laboratory...

Revision of the Austrian Design Method for Standardised Concrete Pavements

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The Austrian specification for pavement design also contains standardised construction types for concrete roads. After more than 10 years of experience with the application of these standard pavement types the specification has been revised comprehensively with a special focus on the following objectives: - establishment of an improved method for...

A Geotechnical Methodology for Roller Compacted Concrete Mixture Design

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This paper presents a concise mix design process using a geotechnical approach to produce RCC mixtures for mass and structural applications. Laboratory compaction tests, using a Kango hammer, were performed on specimens with a predetermined combination of aggregates and cernentious materials, varying the amount of water. 1 he test results...

Spanish Experience in Concrete Pavements on Bridges

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There are more than one hundred and sixty bridges with concrete pavement in Spain. All of them are in motorways with heavy traffic but in very different thermal regions. Three types of bridge concrete pavements are used: monolithic, bonded and unbonded. This paper presents the Spanish experience in concrete pavements...

Applicability of Precast Concrete Pavements with Doweled Joint to Tunnel Road

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Applicability of precast concrete pavement (PRCP) with doweled joints to tunnel roads was investigated. The effects of subbase and dowel bars at transverse joints on the mechanistic behaviors of PRCP were examined. The thermal stresses in PRCP were also discussed. Fatigue and faulting analyses were conducted to compare the fatigue...

Abrasion Resistance of Roller Compacted Concrete (RCC)

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The scope of this work is the behaviour under abrasion of different concrete (RCC) made with limestone, schist and granite aggregates. Binder contents (cement and fly ash) ranging from 90 kg/rn 3 to 190 kg/rn3 were tested. Small concrete slabs 60x60x40 mm were cut from 150000 mm cylinders prepared according...

The Actuality & Prospect of RCCP in China

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The research on RCCP was launched in early 80' in China. The laboratory test started in 1981 followed by the first sectioii of field experimcnt road in 1982. And then extended resmrch was carried out in 1983 and 1984. A few years later in 1988, the research on Cement Concrete...

Continuously Reinforced Concrete Roadbases

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In the Netherlands Rijkswaterstaat is the authority in charge among others of the construction of highways. The department Utrecht of Rijkswaterstaat has chosen a continuously reinforced concrete roadbase for the construction of the 7 km long new highway scction between the cities of Bunnik and I Jtrecht. This choise was...

Concrete Requirements for Ultra-Thin Concrete (Whitetopping) for Flexible Pavements

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Whitetopping solutions for old flexible asphalt pavement overlays have been a challange for highway agencies and designers in the recent past years, with special regards to ultra-thin concrete overlays, also called by ultrathin whitetopping (UTW). Considering the needs of full bond between the UTW and the old asphalt concrete (AC)...

Performance of Thin Concrete Overlays in South South Africa

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Since 1970, several highways in South Africa were cujistructed in Portland cement concrete, the only design being used was the jointed unreinforced concrete pavements. Due to early deterioration as a result of alkali aggregate reaction, one section had to be overlayed In order to determine the last option, several experimental...