High performance concrete - HPC - is characterised by high strength and considerable durability under high service load. In highway construction these concrete is used to constructing and very rapid repairs of pavements, bridges, viaducts and tunnels. Differentiation in types of such objects as well as erection conditions and than...
Application of High Performance Concretes in Highway and Traflic Infrastructure Construction
Retarder Application to Longitudinal Roller Compacted Concrete Pavement Joints
In the case of roller-compacted concrete pavements (RCCP) in spacious site like yard, harbor and so on, socalled fresh joint technique at longitudinal joints is widely used in order to achieve high load-transfer efficiency. However traditional fresh joint technique allowed the limited length of placing, because delay between the fresh...
Modification of Cement Stiffening Time
The stiffening time of cement is a feature whose potential can be better exploited at function of each specific use of concrete. The possibility of control of this feature is useful, as much to get a better concrete performance at function of the each work peculiarities, as to correct behaviour...
New Joints in Rigid Pavement – Highway and Airport
This paper describes a new design of joints in rigid pavement, in this case the angle between joints will be 120 grades in anypoint of the pavement between edges. This new concept about corners angle,change the original work of Westergaard for the "corner load",because it only considerate angles with 90...
Continuously Reinforced Concrete Roadbases
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
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)...
New Composite Cement for High Early Strength Concrete
Even small repairs on roads and runways are time consuming and lead to long time obstructions. Normal cement type mortars and concretes do exhibit iallier long hardening times and are therefore, not suitable for fast track repair. Non cementitious repair materials like resin types have other disadvantages as being only...
Concrete Safety Barriers and Coming European Standards
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...
Computation of Self-Locking Concrete Block Pavements with Finite Element Analysis
The examined computation procedure for self-locking concrete block pavements is based on the ordinary methods adopted for the computation of flexible and semi-rigid pavements. These methods consider a stress and silaiti distiibutiou uiidei design loads. The analysis considers both the classic, elastic multilayer model, and an axisymmetric, finite element model...
Revision of the Austrian Design Method for Standardised Concrete Pavements
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
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
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...