Resources

The need for optimizing preservation and rehabilitation strategies used to maintain highway concrete and asphalt pavements has never been greater, given the current difficult economical outlook faced by highway agencies. Conventional bonded and unbonded concrete overlays have a long history of successful use to preserve and rehabilitate concrete and asphalt...

For decades, damaged asphalt or concrete pavements in the U.S. were repaired by applying the "whitetopping“ technique. This measure covers the damaged pavement with a new layer of a thickness between 15 and 25 cm, in order to re-establish its viability and safety to traffic. In a research project by...

Congestion on German roads increases permanently from year to year. According to the latest prognosis an end to the traffic increase – especially with regard to heavy traffic – is not in sight. At the same time the Federal government, the German states and communities lack capital for new infrastructure...

In order to rehabilitate non-dowelled secondary concrete slab roads or to reduce noise caused by faulting slabs, it is necessary to have a clear understanding of their stability.. Faulting, pumping and the presence of voids must be investigated, and appropriate stabilization measures must be taken. Different investigation techniques are applied...

This paper describes the design and construction of an Ultra-Thin Continuously Reinforced Concrete Pavement (UTCRCP) that has been constructed near Paarl, Western Cape, South Africa. The UTCRCP may be described as a specific implementation of Strain Hardening Cement-based Composites (SHCC) in the field of pavement engineering. Mix design of the...

On 19 May 2006, the Premier of the Gauteng Province in South Africa announced the project: “gravel roads to surfaced roads, stormwater drainage and walkways projects within the top twenty townships (20T Project)”. The main aim of the project was to improve the living conditions of communities in previous neglected...

In recent years, exposed aggregate concrete has been used increasingly for the construction of the top surface of concrete pavement in Germany. Following placement, the fresh concrete surface is usually sprayed with a combination of a retarder and a curing agent (first curing). Depending on weather conditions and concrete composition,...

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...

One of the main problems faced by today's engineers is the lack of quality natural materials and accumulation of waste materials. Among the materials which are increasingly burdening landfills are industrial by-products. Slag is one of the common used industrial by-products and it can be used in all layers of...

One of the basic premises in any infrastructure project is the use of locally available materials in order to optimize resources. This criterion was adopted for the construction of the first section of RN 14 highway in Argentina. A concrete mix design was prepared in laboratory using a Siliceous River...

Photocatalytic cementitious road materials represent a new frontier in air quality improvement research, thanks to photocatalysts ability to accelerate natural reaction of oxidation, favouring the pollutants decay. This paper presents some findings that contribute to a better understanding of the effectiveness of photocatalytic road materials, evaluating the synergetic effect of...

The Ecoparc des Cettons is a sustainable business park. Designed to favour regional economic development and to boost employment in a loop of the Seine River 25 kilometres from Paris, authorities deliberately opted for an innovative approach complying with the environment including mainly: - the use of alternative techniques for...