This paper presents a new generation of cementitious material devoted to pavement bedding layer construction and named MACES. This material contains a high volume of water in order to be very fluid and selfcompacting. It has also been designed in such a way that the free water in excess rapidly...
Study on Perfectly Bonded Ultra-Thin Whitetopping
Ultra-thin whitetopping is a repair method using concrete for asphalt pavement, whose primary characteristic is to allow the existing asphalt pavement and concrete to perform monolithically as a composite section. The existing asphalt concrete is normally milled to achieve such a bond, but milling can reportedly cause debonding of asphalt...
The Use of By-Product Phosphogypsum with Cement for Soil Stabilization
The aim of this research is to improve the properties of the soil by using phosphogypsum with cement stabilizing agent.Phosphogypsum and cement were used with the locally available soils in different portions and Atterberg limits, maximum dry density, optimum moisture content and unconfined compressive strength test were determined. It was...
Skid Resistant, Noise-Reducing Concrete Roads
Concrete motorways providing high performance and durable operation have been manufactured for many decades; nevertheless, continuous advancements are necessary to fulfill changing boundary conditions. Major challenges here are posed by increases in the volume of traffic as special requirements of traffic safety, environmental compatibility and economy. In order to develop...
Application of Ultra-Thin Whitetopping (UTW) on Bituminous Pavements in Factory Areas. An Italian Experience
The paper describes an application of ultra-thin white-topping on a bituminous factory pavement. Different road cement concrete mixes were studied: high-strength concrete, concrete with PP fibres added, concrete modified with latex, concrete made by tyre-rubber grains instead of natural aggregate and steel fibre reinforced concrete. The binder was CEM II/A-L...
Reconstruction of a Cement-Stabilised Fly-Ash Road-Base
In 1999 - in the province of Noord-Brabant in the Netherlands - an eighteen-year-old asphalt road with a cementstabilised fly-ash road-base, appeared to be in bad condition. Further investigation showed that the base was almost completely disintegrated, probably due to bad drainage and due to a possibly low cement content....
Overview and Comparison of the New Belgian Standard Specifications For Concrete Roads
Belgium is made up of 3 regions: the Region of Flanders, the Walloon Region and the Brussels Capital Region. Managing and maintaining the national trunk roads is a regional matter and therefore also carried out in Belgium by three different administrative authorities. Each of these administrative authorities has drawn up...
Life Cycle Cost Analysis Allows to Identify Profit Areas of Concrete Pavements
The need for constructing road pavements characterised by controllable technical performances, high durability and reduced construction and maintenance costs, led to the development of design criteria and procedures for the technical and economic appraisal of the pavements based on Life Cycle Cost Analysis (LCCA). New materials, new technologies and innovating...
Surface Properties of Road Construction Concrete Produced with Portland-Composite Cements
High concrete pavement performance requires excellent concrete quality. One imp ortant factor guaranteeing this high quality is the proper selection of qualified cement. The use of blended cements is increasing more and more. Especially the market share of Portland composite cements (cement type CEM II according to EN 197-1) shows...
Comparative Investigation on Concrete Pavement Thickness Using Industrial Waste Chips, Steel Fiber and Silica Fume
Application of steel fiber in concrete would increase modul of rapture (MR) and module of elasticity (E), which in turn decrease slab thickness in rigid pavements. Hence, damaging stresses due to thermal and moisture is reduced. Where as concrete mixes with Silica Fume (SF) would perform the same behavior with...
Alkali-Silica Reaction Prevention by Lithium Salts
After the exploration of damages caused by alkali-silica reaction (ASR) on highway bridges in Turkey recently, the usage of reactive aggregate on highway construction was prohibited. However, this does not seem to be the proper solution, because natural aggregate leads to an increase in workability of concrete due to its...
The Acoustical Properties of Optimised Exposed Aggregate Concrete in the Netherlands
About nine years ago, the Dutch Association of the Netherlands Cement industry (VNC) initiated indicative noise measurements on three new types of concrete roads. It was shown that exposed aggregate had a potential for further optimising. The Dutch Information and Technology Centre for Transport and Infrastructure (CROW) initiated in 1996...