Pavement Type Selection: What is the Ideal Process?

Highways Members Only

Pavement type selection is often one of the more challenging and controversial decisions highway administrators face. The process involves weighing engineering factors such as materials, structural, and even long term performance against initial and life-cycle costs to help agencies decide between various pavement alternatives. Given the expenditure of significant public...

Long-Term Performance of a Concrete Pavement in a Motorway on Plastic Soils in Spain

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The Sevilla – Cádiz motorway was the first one in Spain where a concrete pavement was constructed with a slip-form paver. It was opened to traffic in 1971. Shortly, longitudinal cracks appeared, deemed to the presence of plastic soils in the subgrade. Sometimes these craks were several centimetres wide. It...

Concrete Pavement Recycling Practices in the US

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Concrete pavements are recycled for paving applications in at least 41 U.S. states and production of recycled concrete aggregate (RCA) in the U.S. currently averages about 140 million tons (127 million metric tons) per year. The primary application of RCA has been subbase materials, but it also has been used...

Life Cycle Assessment for Road Construction and Use

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At present the choice of materials and techniques in road construction is dictated by structural requirements and economical aspects. Ecological factors have gained in importance due to environmental considerations in politics and society. To evaluate the environmental impact of motorways, a life cycle assessment (LCA) according to ISO 14040 was...

Ten Years of Good Performance of Ultra-Thin Whitetopping Experiment in Brazil – Summary of Main Learnings

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During the 1999 spring, two sections of ultra-thin whitetopping (UTW) were built in an urban street at a bus stop within the University of São Paulo campus, over a thin 45 mm asphalt layer. The UTW was constructed, defining two square panels of 0.6 and 1.0 m in size and...

Precast Concrete Pavement for Intermittent Concrete Pavement Repair Applications

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Precast pavement technology is a recently improved construction method that can be used to meet the need for rapid pavement repair and construction. Precast pavement systems are fabricated or assembled off-site, transported to the project site, and installed on a prepared foundation (existing pavement or re-graded foundation). The system components...

Non-Reinforced Concrete Pavements for Heavy-Load Service

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Usually pavements for heavy load service are constructed with double reinforced concrete. Mostly their thickness is about 40 cm and – beside the high costs – there are structural problems with the placing and the design of joints, if unwanted cracks and steel corrosion should be avoided. In addi-tion to...

Cement Treated Base with Recycled Aggregates Coming from C&D Wastes

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? The behaviour of the cement treated bases was more performant than the "foreseen one for the effective" regulatory scheme, while the one of the ballast was adjusted to this forecast. ? The behaviour of the materials with recycled aggregates was similar to the natural ones regarding their measurements achieved...

Technical Prescriptions for Concrete Pavements by the Spanish Ministry of Development

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Prescriptions for concrete pavements issued by the Spanish Road Administration are included in two types of documents: the Standard for Structural Sections of Pavements (6.1 – IC) and the Specifications for Road and Bridge Works (PG 3). These documents were updated considering the latest advances in materials, construction processes and...

Competition and Its Role in Pavement Type Selection in the US

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Today, less than 15% of the National Highway System in the United States is comprised of concrete pavement (FHWA, 2007). However, in 1956, at the beginning of the interstate era, the vast majority of primary US routes were concrete roads. Why this significant change in pavement type selected? This paper...

Finely Graded Surface Concrete (FGSC) a Sustainable Solution for Exposed-Aggregate Concrete

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As a general feedback of most studies and site experiments, the lower the maximum size of aggregate, the lower the rolling noise for exposed aggregate concrete roads. Yet, a small size of aggregate increases the cement demand, and by the way the unit cost of concrete. This is a supplementary...

Fast – Track Concrete for Repairs in a Continuously Reinforced Concrete Pavement in Spain

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A continuously reinforced concrete pavement (CRCP) was opened to traffic in 1976 in the North of Spain. It is located in a 43 km long motorway. Each carriageway is 12,00 m wide (concrete pavement is 8.00 m wide). The top layer is a 22 cm thick CRCP. Longitudinal reinforcement consists...