Design

CEN Technical Committee TC 227 is responsible for the European Standards dealing with road materials. As a part of its working programme, 33 standards have been prepared concerning materials for concrete pavements. Six of them deal with specifications for materials, functional properties of concrete pavements, dowels and joint sealants (hot...

“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...

The skid resistance of any surface is an important characteristic for the driving safety point of view. The rain affects the traffic security, because there are splash and sprays effects caused by the truck wheel. This fact contributes to the dynamic hydroplaning effect. In recent years many agencies research’s has...

Modieslab, a recently developed innovative and settlement-free precast concrete pavement structure, with a twin-layer porous concrete wearing course, was tested for its functional and structural properties on two full scale test pavements. Some functional properties, e.g. noise reduction, were very satisfying, however the resistance to raveling and especially the skid...

Thin white toppings (TWT), as originally developed in the USA in 1918, are in majority placed as an overlay on deteriorated asphalt pavements. Usual thicknesses were 150 – 225 mm but since the last 30 years also ultra thin white toppings (UTWT) with thicknesses of 75 – 150 mm are...

In certain areas there is a need to surfacing sand roads due to agricultural developments: mechanisation and efficient management of farming activities are essential. Farmers must have direct access to the fields at all times without too many obstacles. However, attention must also be paid to various other aspects: environmental...

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...

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...

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...

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...

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...

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...