The metropolitan area of the city of Castellón, situated East of Spain at the Mediterranean coast, has a network of dedicated bus platforms, which was conceived with two main purposes: to enhance public transport and to structure urban development. As a part of this network, a bus platform, 3.9 km...
A Framework for a New Protocol for Evaluating Concrete Curing Effectiveness
Excessive early early-age concrete surface moisture evaporation can be a source of key issues in the paving of concrete pavemen t, such as plastic shrinkage cracking and spalling related delamination; the use of liquid membrane membrane-forming curing compounds is one of the most prevalent methods to protect hydrating concrete surfaces...
Recent Advances and Uses of Roller Compacted Concrete Pavements in the United States
Roller Compacted Concrete (RCC) is a no slump concrete that is placed by an asphalt paver and compacted with vibratory rollers similar to asphalt pavement construction. RCC has long history of good performance as a pavement for ports, container yards, and manufacturing plants. This paper will summarize a recent survey...
Belgian Specifications for Freeze-Thaw-Resistant Pavement Concrete
The Belgian standard specifications contain a number of clear requirements for the composition of concrete mixtures and the properties of fresh and hardened concrete. It is generally known that water and air content have a substantial impact on the frost susceptibility of a concrete surface the former in a...
Precast and In-situ Concrete Barriers the Complete Safety Solution for Roadsides
The technology of in-situ concrete safety barriers has not really changed in the last two centuries. After an extensive development and crash-test program a new generation was created recently. This is a technical report on the right way to use in-situ concrete at today´s level of technology. In the central...
Fibremix Concrete for Pavements Experimental Search for Maximum Crack-Free Slab Length
Road constructions with fibremix concrete allow longer distances between joints, compared to unreinforced concrete pavements. In the absence of a dedicated design tool for fibremix concrete pavements, the search for a maximum crack-free slab length took place in several projects. Fibremix concrete has been used in parking areas near motorways,...
Uncertainty Management in Comparative Life-Cycle Assessment of Pavements
There is significant uncertainty and variation in the environmental life cycle assessment of pavements. Uncertainty and scenario variation should be sufficiently accounted in the comparative life cycle assessment in order to increase the confidence on decisions regarding the environmental implications of alternative pavement systems. In this paper we first present...
Experimental Short Continuously Reinforced Concrete Pavement Crack Pattern and Load Transfer Efficiency Across Cracks
As a proposed long-term pavement solution for bus stops and corridors in highly urbanized areas, four experimental short continuously reinforced concrete pavement (CRCP) sections with different percentages of longitudinal steel were built in São Paulo, Brazil. The pavement sections are only 50 meters long each, a short constructive length in...
Probabilistic Life-Cycle Cost of Pavements Characterization and Application of Parameter Input Variation for Scenarios
Life Cycle Cost Analysis (LCCA) evaluates the economic performance of alternative pavement investments. Currently, practitioners treat input parameters as static, deterministic values, which although computationally simpler, will hide the implicit uncertainty underlying the analysis. Over the past decade, an emphasis has been placed upon accounting for uncertainty by treating input...
Measurements and Evaluation of the Bearing Capacity of Cement Concrete Pavements
Concrete pavements dynamic loading tests are one of the diagnostic method to which the goal is to obtain background for evaluation of bearing capacity. In this article are described experimental measurements and results of these measurements on various slab locations, taken from measurements for recognition of connection between slabs and...
Road Safety and Surface Durability Aspects on Hungarian Cement Concrete Pavements
The ratio of cement concrete pavements has increased in the Hungarian motorway network in the last decade, and it has appeared also in the local road network. There are 15 cement concrete pavement sections with different type in Hungary. Maintenance agencies need a simple methodology for calculating surface deterioration of...
Air Void Formation in the Laboratory and in Practice
As a result of a short mixing time excess air-entraining agent (AEA) is added during the production of air-entrained concrete to achieve the required air content. In this case, the fresh concrete contains AEA that has not been fully activated. If there is a subsequent input of mixing energy, the...