The purpose of this paper is to bring to the attention of the highway community in Portugal, a methodology that allows the construction of bridge decks with Portland Cement surfaces without the need to use bituminous surface layers. This paper will present construction methods, cost benefit analysis, some of the...
Why Should Bituminous Layers Be Used Over Portland Cement Bridge Decks
Effects of Loss of Support on the Residual Life of JPCCP
One of the most frequent ajid insidious distresses in Jointed Portland Cement Concrete Pavements (JPCCP) is the loss of pavement support near the joint. This problem is principally caused by a lack of maintenance ofjoint sealing that can give rise to the well-known phenomenon called pumping in the presence of...
A Comparison of Life Cycle Costs of Asphalt and Concrete Pavements by Computer Modelling
In the beginning of the 1990s the coiiciete industry tried to introduce newly developed concrete pavements on the Danish market, which is dominated by asphalt pavements. A number of rough estimates were carried out by all the involved parts, showing completely different results. In this paper a non-biased intensive study...
Fast Track Paving in Vienna
Opening concrete pavements to traffic the day after placing has been a routine practice in Vienna for many years, but increasing traffic requires even shorter closure times. On motorways even a single lane can be closed to traffic only at night or at weekends. With a w/c of 0,35 and...
Whitetopping and Ultra-Thin Whitetopping – the US Experience
Concrete overlays of existing asphalt pavement, referred to as "whitetopping," is one of the most rapidly emerging technologies for rehabilitating pavements in the U.S. Although its use can be traced back to 1918, conventional (or classical), whitetopping became routinely used in the mid-1970's with use significantly increasing in the 1980's...
First Experience of Noise-Reducing Exposed Small Aggregate Concrete Surfaces in Japan
In Nagoya, Japan, for a national highway having a large-scale common duct set under the road, concrete pavement with transverse brooming has been adopted in order to ensure structurally durable pavements. However, because these roads are located in an urban area, demand for less noisy pavements has increased. Therefore, in...
A Practical Method of Concrete Pavement Design for Ports
Puertos del Estado, the co-ordinating institution of the main Spanish Port Authorities, has published in 1994 the Guidelines for the Design and construction of Port Pavements ROM 4.1-94, where a practical method of structural pavement design for ports areas has been developed, offering a novel and useful contribution. The different...
Control of the Rate of Concrete Compaction in the Structure – a Guarantee of the Cement Concrete Pavement and Base Durability
A 7 Lu 8% reduction in compactness of air-entrained concrete with respect to the maximum one is a positive factor from the frost, -salt resistance standpoint, nevertheless, such compactness of roller compacted concrete can lead to dangerous results. The existing methods of controlling the compaction rate (measuring the volume of...
The Influence of Friction Between Layers on Surface Deflections of Rigid Composite Pavement Structures
The paper presents the influence of friction between layers on surface detlections of rigid composite pavement structures. Pavement structures were analysed using BISAR Programme and non- destructive testing technique under different bonding conditions between the asphalt and the concrete layers. The analysis of the data involves the use of hack-calculation...
Surface Texture of Roller Compacted Concrete Pavement
An iiiteiisive iesearch on roller compacted concrete pavement for high speed roads has been conducted in China since the beginning of this decade. Many technical reports document that the surface of RCCP is smooth due to the effect of the roller, and texturing such dry and less workable material is...
Some Aspects of Chloride Corrosion of Cement Paste and Mortar
The durability of different kinds of cement i.e. PC 45 and PC 55, slag cement (SC) and alkali activated slag (AAS) has been investigated. The mortar were cured in a strong chloride solution and the expansion and strength were measured. Additionally, the frost resistance was tested according to ASTM Standard....
Processes of Structure Formation and Properties of Cement Stone with Polymer Additives and Disperse Reinforcement for the Repairs of Road Pavements
The addition of special polymer additives and dispersc reinforcement can improve the physicomechanical properties of cement stone being used in road construction.