The National Precast Concrete Association, the Official Laboratory of the Mining University School of Madrid through the Gomez Pardo Foundation and a group of Spanish manufactures of terrazzo tiles, with the collaboration of the Spanish Ministry of Industry, Tourism and Trade have developed a research project to find and test...
Working Mechanisms of Air-Entraining Admixtures and their Subsequent Activation Potential
From some job sites it was reported that the air void content of the hardened road concrete was considerably higher than that of the fresh concrete, especially, when air-entraining agents based on synthetic active constituents have been used. Investigations in the Research Institute with commercial air-entrainers based on synthetic and...
Design & Construction of An Experimental Two Layer Concrete Pavement Motorway Section in Spain
In June 2006, GISA a Public Company GISA, within the Department of Planning and Public Works of the Catalonian Regional Government, awarded CEDINSA the concession for the project of constructing and operating the projects of converting into a dual carriageway the stretch Vic-Ripoll of the C-17 highway. As a participant...
Sustainability and Concrete Pavements for Real Engineers
Practicing engineers are under increasing pressure from pavement owners to become ?sustainable?. There are a myriad of publications, models and rating systems available that aim to assist them in this endeavor, in fact so many that they become overwhelmed. This paper provides practical guidance that includes definitions of the terminology,...
Measurements of the Emissions of Particulate Matter (Pm10) from a Concrete Compared to a Stone Mastic Asphalt Highway
A mobile measurement system was used to quantify the relative importance for the road dust particle emissions on highways with concrete and stone mastic asphalt (SMA). Studded and non-studded winter tires were tested at 70, 90 and 110 km/h. The measurements were performed during October on dry, clean roads. Both...
Modern SFHC Super Fast Hardening Concrete Repair System for Airfields and Roads, Based on Special Cement for Infrastructure Projects
The importance of fast traffic area repairs is increasing. For roads and airfield service areas a specific fast repair system has been developed to satisfy the demand. This system uses standard methods of ready-mixed concrete and is appropriate if a few additional requirements are taken into account. The placing is...
Concrete Bus Lanes
Cities worldwide are facing problems of traffic congestion in their centres and suburban areas as well as on access roads. In densely populated countries like Belgium and the Netherlands this phenomenon also occurs on roads linking cities. Because of these mobility problems and the serious impact on the environment, decision...
Posibilities of Concrete Pavement Blocks
During the last years precast concrete pavements have increase their market. The main reason of this success is the large amount of possibilities which offer to the client. Maintaining the best mechanical properties precast pavements can give to the designer the freedom necessary to create singular environments, and what is...
Latest Findings on the Construction Type Continuously Reinforced Concrete Pavement
In 1920, the first Continuously Reinforced Concrete Pavement (CRCP) was constructed in the USA. In Europe, this type of construction was first applied in Belgium in 1948. Since then, more than 50.000 km of CRCP have been built in more than 30 countries. These implementations have shown increased driving comfort,...
Initial Cost Comparison of Rigid and Flexible Pavements: Under Different Trafic and Soil Conditions
In this paper, the economic analysis has been done on both flexible and rigid pavements. These cost analyses play a great role on the decision-making stages in selection of pavement types. In this analysis initial cost of rigid and flexible pavements have been determined for both flexible pavements and rigid...
Effect of Pavement Type on Rolling Resistance and Fuel Consumption of Heavy-Duty Vehicles
The purpose of this study is to research the influence of fuel consumption of heavy-duty vehicle for concrete pavement and asphalt pavement respectively. It was decided to adopt a new approach for vehicle fuel consumption -- measurement of the running resistance of vehicles to investigate their rolling resistances due to...
Durability of Exposed Aggregate Pavement
In recent years, exposed aggregate concrete has been used increasingly for the construction of the top surface of concrete pavement in Germany. Following placement, the fresh concrete surface is usually sprayed with a combination of a retarder and a curing agent (first curing). Depending on weather conditions and concrete composition,...