In 1998, the Chilean private companies exploiting rock deposits for the aggregate production necessary in the construction industry, promoted the creation of the multilateral Commission with the purpose of solving problems of supply and demand unbalance, uncontrolled environmental impacts and serious legal gaps and/or superpositions. This Commission has been in...
Continuously Reinforced Concrete Roadbases
In the Netherlands Rijkswaterstaat is the authority in charge among others of the construction of highways. The department Noord Holland of Rijkswaterstaat has chosen a continuously reinforced concrete roadbase for the construction of the 9 km long new highway section between the cities of Haarlem and Hoofddorp. This choise was...
Rapid Replacement of Deteriorated Concrete Slabs Under Traffic
In the course of utilization the utility value and condition of concrete pavements decreases due to traffic and environmental burden. Their utility value is judged by edge/corner demolitions, settlements, horizontal movements and the overall condition. In case of damage individual slabs must be replaced. The aim of this study is...
New Tool For Design of Concrete Pavements
New structural design software is presented that deals with flexible, composite and rigid structures. The pavement design is based on a trial-and-error process involving the use of the linear elastic multilayer model for flexible and composite pavements (Burmister's theory) and the strength of materials (Pasternaks theory) for the rigid ones.
The PIARC Guideline on in Situ Recycling of Pavements with Cement
Recycling techniques to take profit of materials from existing pavements are being increasingly used, due to different technical, economical and ecological reasons. Therefore, the Technical Committee C7/8 on Pavements of PIARC (World Road Association) has prepared three guidelines dealing respectively with hot recycling in plant of bituminous mixt ures cold...
Surface Properties of Road Construction Concrete Produced with Portland-Composite Cements
High concrete pavement performance requires excellent concrete quality. One imp ortant factor guaranteeing this high quality is the proper selection of qualified cement. The use of blended cements is increasing more and more. Especially the market share of Portland composite cements (cement type CEM II according to EN 197-1) shows...
Comparative Investigation on Concrete Pavement Thickness Using Industrial Waste Chips, Steel Fiber and Silica Fume
Application of steel fiber in concrete would increase modul of rapture (MR) and module of elasticity (E), which in turn decrease slab thickness in rigid pavements. Hence, damaging stresses due to thermal and moisture is reduced. Where as concrete mixes with Silica Fume (SF) would perform the same behavior with...
The Use of By-Product Phosphogypsum with Cement for Soil Stabilization
The aim of this research is to improve the properties of the soil by using phosphogypsum with cement stabilizing agent.Phosphogypsum and cement were used with the locally available soils in different portions and Atterberg limits, maximum dry density, optimum moisture content and unconfined compressive strength test were determined. It was...
Skid Resistant, Noise-Reducing Concrete Roads
Concrete motorways providing high performance and durable operation have been manufactured for many decades; nevertheless, continuous advancements are necessary to fulfill changing boundary conditions. Major challenges here are posed by increases in the volume of traffic as special requirements of traffic safety, environmental compatibility and economy. In order to develop...
Inlay in Continuous Reinforced Concrete on the A10 Brussels – Oostende at Ternat
Between September and November 2002, an inlay in continuous reinforced concrete was constructed on the A10 motorway between Groot-Bijgaarden and Ternat. The main components of the section of road are concrete slabs that are overlaid with asphalt surfacing. The work was performed in the shortest possible period, during which the...
Modieslab Innovative Prefabricated Modular Concrete Slab For Concrete Roads and Airfields
The Dutch Federal Highway Administration introduced the project Roads to the Future in the year 2000. Amongst other innovations, the MODULAR ROAD, was one of the sub-projects. In a contest several parties in the roudbuilding business were asked to develop an idea for a modular type of road that had...
The Structural Properties of Optimised Exposed Aggregate Concrete in the Netherlands
Indicative research on three new types of concrete roads by the Dutch Association of the Netherlands Cement Industry (VNC) in 1993 had shown that a concrete surface of exposed aggregates could be further optimised with respect to traffic noise reduction. In 1996, the Dutch Information and Technology Centre for Transport...