In situ Concrete Step Barrier provides one of the SAFEST BARRIER solutions for central reserves on road networks because of its almost unique ability to contain heavy vehicles without deformation and thereafter to require NO MAINTENANCE with associated road narrowing and the resulting traffic congestion. The development of Concrete Step...
The Skid Resistance in Mexican Concrete Roads
This work describes the activities developed in Mexico to improve the selection criteria for stone aggregates which are used in surface layers for concrete pavements. The experience has shown that the current mechanical resistance requirements for stone aggregates often do not assure an adequate behavior. In other words, the selection...
Repair of Longitudinal Joint Between the Hard Shoulder (Asphalt) and the Right-Hand Lane (Concrete) on the a 3 Between Bertem and Landen
Contractor VBG NV from Heusden Zolder started the execution of the above-mentioned site in August 2005 for an amount of 2 million EUR. It concerned large-scale structural maintenance: the repair of the longitudinal joint between the hard shoulder and the right-hand lane (continuous reinforced concrete) had been necessary for...
Functional Contracts in Bavaria
In 2004 the pavement of the Inntal-highway from the interchange Inntal to the border at Kieferfelden was reconstructed from km 11 to km 22 using a Functional Contract. For Functional Contracts the quality of the construction work is defined by the view of the road users. The expectations of the...
De-Pollution Activity Assessment of Photocatalytic Cement-Based Materials from Laboratory to Real Scale Testing
Photocatalytic materials are discussed for various applications in building technology ranging from de-soiling to de-polluting applications. However most of the efficiency proofs are derived from indirect laboratory scale tests. Italcementi Group has developed a range of cement-based products based on the TX Active? concept demonstrating both photocatalytic activity and performances...
Noise Emission Comparison Between Porous Concrete and Porous Asphalt Road Pavements
In this investigation the Authors developed a particular grading curve for the manufacture of a porous concrete road pavement and assessed the noise emission due to vehicles tyres rolling belonging to its use. In fact, this innovative superstructure, apart from guaranteeing excellent superficial characteristics from the standpoint of grip and...
Paver-Compacted Concrete, a New and Innovative Method of Constructing Road Pavements Exposed to Heavy Traffic
The world-wide debate on suitable economic measures to improve mobility and energy efficiency has also led to the development of new and innovative construction materials and methods as a way of solving the problem of how to pave roads and trafficked areas economically. One such innovation is paver-compacted concrete, or...
Concrete Pavement in the Streets of Access to Paranaguá Port in the South of Brazil Portside Area Revitalization
The objective of the concrete pavement construction design of the main access streets to all Paranagua Port Terminals was to improve the traffic of trucks which transport goods being imported into and exported out of Brazil. Concrete pavement was the final engineering design chosen for this job due to the...
Roller Compacted Heavy Concrete (RCHC) for Pavement Strength and Density
In the technology of the Roller Compacted Concrete (RCC) for pavement, various types of aggregations are used classically as aggregates, such as the crushed and the rolled aggregates limestone and siliceous, giving concretes with a relative density in the order of 2200 to 2300 kg/m3. In the present work, we...
A New Design Method of Concrete Pavements
In this paper a new design method of plain concrete pavements without bond to the subgrade is presented. For the first time, stresses resulting from environmental conditions will be considered in a realistic way in addition to stresses due to live loads. The basis of this new design method is...
CRCP a Cost-Effective Long-Life Pavement Solution for Highways & Expressways
Continuously Reinforced Concrete Pavement, CRCP is a concrete pavement that is reinforced with steel bars in the direction of traffic. CRCP is a durable pavement solution, advancement to plain concrete pavement. Reinforcement is used in CRCP, to tackle the problem of concrete slab cracking, instead of joints used in conventional...
Using Evenness Data for the Systematic Application of the Falling Weight Deflectometer on Concrete Roads
In many countries the Falling Weight Deflectometer (FWD) is used to assess bearing capacity and thereby the structural condition of concrete roads. Due to the fact that the FWD is a stationary measuring system it can be used only for object related assessment of bearing capacity, but not for network-level...