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...
Concrete Pavements with Geotextile Interlayer in Germany Measurements and Long Term Behaviour
Since 2001 the design with an interlayer of geotextiles is a standard structure in the German pavement catalogue RStO 01. Geotextiles shall guarantee uniform, elastic support of the concrete slab, hence reducing stresses due to temperature and moisture gradient, reduce pumping processes and prevent an origination of reflection cracks from...
Mölltal Concrete Pavement 50 Years Under Traffic
The design period of pavements in Austria is in general defined with 20 to 30 years. According to the Austrian standards and guidelines for pavement design the design life for bituminous roads is 20 and for concrete roads is 30 years. Looking at existing roads, it can be recognized that...
New CRCP Designs in the UK
The paper presents the main findings of a 3-year project to develop new designs and specifications for continuously reinforced concrete pavement (CRCP). The performance and design parameters investigated were surface cracking, the concrete strength, and the foundation. The effects of these parameters on the structural integrity and durability of CRCP...
Durability of Texture of Concrete Pavements
The durability of concrete pavement depends on its load bearing capacity and the performance properties of the surface texture during use. During wet weather conditions the textured surface should provide good tyre grip for safety reasons. In recent years increased focus has been placed on the noise emitted by road...
Working Mechanisms of Air-Entraining Agents
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. Initial investigations in the Research Institute with six air-entrainers based on synthetic and natural active agents showed that a substantial increase in air content...