As part of the Ministry of Transportation Ontario (MTO) drive to pursue innovation and have the “greenest” roads in North America, MTO is actively pursuing the use of pervious concrete pavement. Pervious concrete provides many environmental benefits and is recognized as a stormwater management best practice. There is also strong...
Mix Design Method and Void Performance of Concrete for Pervious Concrete Pavement [No Fines Concrete]
Pervious concrete pavement is drawing increasing attention for its high content of interconnected voids which is expected to reduce the environmental impact as concrete is often counted as a causal factor of the urban heat island phenomenon. Performance of pervious concrete can be measured by water permeability, water retentivity and...
Increase of Safety of Concrete Pavements Bright Concrete Pavements with Dark Aggregates #2
The method of constructing bright concrete Pavements with dark aggregates presents a variety of advantages; an essential benefit is the brightness of concrete pavements compared to bituminous pavements, because brighter street surfaces affect positively the safety of the road users. Above all, bright concrete surfaces provide an increase in safety...
Cement Treated Base with Recycled Aggregates Coming from C&D Wastes
? 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
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
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
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)
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
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
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
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
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...