Serviceability of the concretes that undergo such effects of repetition of freezing-thaw is greatly affected by water-cement ratio, permeability, composition of the cement and mineral additves. Water-cement ratio being between 0.40-0.50, the concrete having a structure without any voids, using a cement with mineral additives, increase the resistance of the...
Finite Element and Post-Crack Analysis of Fiber Reinforced Concrete Pavement Structures
Potentially useful improvements in the mechanical behaviour of concrete can be achieved by incorporating fibers in the concrete matrix while it is being poured. In this study an analytical investigation was performed using a finite element analysis where various materials and geometrical parameters were included in different sets of numerical...
Management of the Aggregate Industry in Chile
In 1998, the Chilean private companies exploiting rock deposits for the aggregate production necessary in the construction industry, promoted the creation of the multilateral Commission with the purpose of solving problems of supply and demand unbalance, uncontrolled environmental impacts and serious legal gaps and/or superpositions. This Commission has been in...
Concrete Highway Pavement with Thin Upper Layer Concrete and Concrete Pavement on Short Bridges
For concrete pavements the new thin upper layer concrete construction method, potentially in connection with the method of thick concrete pavement placed on an unbound roadbase enables a 40mm thick upper layer concrete having a maximum aggregate size of only 8mm to be placed instead of a 70mm thick upper...
Crack Initiation and Propagation in the Continuously Reinforced Pavement of the Zuidtangent
In the period 1996 2001 the Zuidtangent" was designed and constructed. The "Zuidtangent" is situated between Haarlem and Amstelveen, just south of Amsterdam (The Netherlands). The "Zuidtangent" is designed as a special purpose road connection for public transport and plays a major role in the accessibility of the Schiphol...
Experimental Validation of Rigid Road Structure Design
surfaces, which is a product developed by the BRRC (Belgian Road Research Centre) and Febelcem (Federation of the Belgian Cement Industry), it became clear that it would be necessary to conduct onsite validation in the area of rigid roads. In particular, the various hypotheses regarding the effectiveness and durability of...
Concrete Roads in Pavement Management Systems from Technical To Political Responsibilities
CROW published in 2001 in the Netherlands the new national methodology on Pavement Management Systems on asphalt, block pavements and concrete roads. DHV has been the author of this publication. Two major improvements are implemented in this new methodology: 1. concrete pavements are fully included 2. a connection has been...
Laboratory Studies for a New Self-Compacting Bleeding Cementitious Material For Pavement Bedding
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...