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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...

Replacing the Aggregate by Rice Husk Ash in Roller Compacted Concrete for Composite Pavements

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World rice production reaches 662 million tons per year. The husks represent 20% of this amount and when burned, 20% of this byproduct is transformed into rice husk ash (RHA). In general, there is not an environmental management policy concerning this residue. Roller compacted concrete (RCC) is a material which...

Mix Design and Mechanical Evaluation of Hydraulically Bound Mixtures Made with Waste Foundry Sand and Steel Slags

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The paper describes an experimental study concerning the use of hydraulically bound mixtures for roads and highways foundations, with the aggregate skeleton fully composed by industrial by-products, as foundry sands and steel slags, used with three different proportions. The laboratory investigation involved a preliminary study of the physical-geotechnical properties of...

Main Road Rn7 Between La Pacaudière and Changy (Loire, France) A High Performance Treated Capping Layer at the Limit of the Specifications

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A new section of main road Route Nationale 7 (RN7) has been under construction since 2007 between La Pacaudiere and Changy (Loire, France). The capping layer had to be treated with 1% lime and 5.5% cement. At the beginning of the working, the building company proposed another solution to build...

Subgrade Stabilization and Pavement Recycling for the Widening of the A-495 Highway in Huelva (Spain)

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The upgrading of the A-495 between Gibraleón and San Bartolomé, in the province of Huelva (SouthWest of Spain), consists in an widenig of the cross section (which some years ago has been enlarged from 6 m in the original work to 8 m after a first rehabilitation) to 10 m...

Assessment of Pick-Excavability of Controlled Low-Strength Materials for Trenches

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This paper reports research concerning the excavatability assessment of controlled low-strength materials for trenches with a pick, thanks to the proposal of a laboratory and a field test. Attention is specially focused on air-entrained mortars and very lean concretes. The scientific approach is first presented. Then details and results on...

Experiences with Cement Stabilisation in Australia and South East Asia

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While cement stabilisation has been an alternate for pavement construction for many years, it is in the last 15 years that there have been significant changes in our knowledge and ability to build long lasting cement stabilised pavements. These developments have been as a result of significant improvements in the...

Special High Technology Binding Materials for Stabilization / Solidification of Contaminated Soils

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Inerting of contaminated soils is a processing technique that prevents them from migrating pollutants affecting the environment. It is based on obtaining by mixing soil with special cement based binders, an array of physical and chemical properties that immobilizes the harmful chemicals preventing its bioavailability. As a technique of treatment...

Cyclic CBR Test of the Natural and Improved Soils

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Improvement or stabilization of soils in subgrade by using lime or binders can provide significantly improved engineering properties. The results of soil improvement can be very substantial increases in resilient modulus values, in shear strength, continued strength gain with time even after periods of damage and long-term durability over decades...

The Belgian Code of Good Practice for Soil Treatment with Lime and Hydraulic Binder Update

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In 2004, the Belgian Road Research Centre published some documents concerning soil treatment with lime and/or cement to make them suitable for use in road applications: a code of good practice including theoretical and practical knowledge and 3 practical guides to specific applications (soil improvement for trench backfills, soil stabilization...

Posibilities of Concrete Pavement Blocks

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During the last years precast concrete pavements have increase their market. The main reason of this success is the large amount of possibilities which offer to the client. Maintaining the best mechanical properties precast pavements can give to the designer the freedom necessary to create singular environments, and what is...

Safety and Durability of Pedestrian Precast Concrete Pavements

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The National Precast Concrete Association, the Official Laboratory of the Mining University School of Madrid through the Gomez Pardo Foundation and a group of Spanish manufactures of terrazzo tiles, with the collaboration of the Spanish Ministry of Industry, Tourism and Trade have developed a research project to find and test...