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Effect of Nonuniform Foundation Support on Concrete Slab Responses

Conference-paper-iscp

The ability to spatially map the stiffness of the foundation layers under concrete pavements with intelligent compaction has created a need to define limits on the allowable stiffness variations in a given construction area as well as the maximum size of a non-complaint area which does not require remedial action....

Technical and Economical Feasibility of Pavement Widenings in Cement Concrete in the Netherlands

Conf-paper-iscr

In 2009 the Dutch Parliament amended special laws to speed up road widening projects. This situation opened possibilities for sustainable concrete pavements needing less maintenance, especially for the right-hand lane that takes the heavy traffic. This paper presents the results of a study carried out in 2009, by a working...

Laboratory Studies on Performance of Porous Concrete

Conf-paper-iscr

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...

Developments on the Modieslab Innovative Concrete Pavement Concept

Conf-paper-iscr

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...

Heavily Reinforced Ultra Thin White Topping to Re-Strengthen Infrastructural Structures

Conf-paper-iscr

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...

Wheel Tracks, the Compromise Between Agricultural and Environmental Interests

Conf-paper-iscr

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...

Functional Contracts in Bavaria

Conf-paper-iscr

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...

CRCP a Cost-Effective Long-Life Pavement Solution for Highways & Expressways

Conf-paper-iscr

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...

Noise Emission Comparison Between Porous Concrete and Porous Asphalt Road Pavements

Conf-paper-iscr

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...

Dutch Step Barrier in Concrete – Best for the UK

Conf-paper-iscr

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

Conf-paper-iscr

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

Conf-paper-iscr

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...