The use of coloured exposed aggregate concrete in public spaces has made considerable progress in Belgium. As such, urban planners have become aware of the architectural value of this technique. The variety of shapes, colours and textures combined with the well-known advantages of concrete such as resistance and durability explain...
Manufacture and Use of Precast Elements for the Construction of Traffic Calming Devices
In recent years, the proliferation of safety devices, the absence of legislation in the matter and the problems encountered in terms of the stability, efficiency and durability of these devices have resulted in the experimental manufacture of precast elements for the construction of road humps and plateaus. At the current...
Imprinted Concrete Installations in Brussels
Over the past years, consideration was given to the damage some streets were exhibiting which had been constructed from porphyre cobblestones paving or concrete block paving. The director of the street accomodation for the region of Brussels took the decision to replace those damaged areas with an Imprinted Concrete Paving...
High Performance Concrete Effects of Curing Conditions
The use of high performance concrete (HPC) is becoming more popular in the United States. Many State Departments of Transportation are replacing conventional concrete especially with HPC bridge decks. Despite the growing popularity of the material, little is known on the effect of the available curing methods on the mechanical...
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 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...
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...
Durability of Concrete Roads with Blended Cements
The study was conducted to bring out the salient features of blended cements, which go a long way in establishing the durability of rigid pavements. Blended cements not only enhance the life cycle of concrete road by protecting it from chloride and sulfate attack but also reduce the thermal cracking,...
Use of Recycled Aggregates in Whitetopping with Addition of Automotive Tires Scraps
The paper presents the results of a study about the use of recycled tire and building materials in concrete for whitetopping on asphalt concrete paving. This report presents the results of laboratory experiments and field tests. These results were obtained with concretes using substitution ratios of 15% to 20% by...
Nondestructive Testing of Concrete Permeability
In this article a research program on performance-based durability design of concrete highway structures conducted at Wayne State University is presented. The relation between concrete durability and its soundness (freedom from cracking) is described. A measure of concrete soundness based on ultrasonic pulse velocity developed during this research that incorporates...
High-Volume Fly Ash Concrete for Concrete Pavements
This paper presents the data on the properties of fresh and hardened concrete made with replacement of the Portland cement by fly ash, from a thermal power plant in Turkey, up to large volumes (55%). The investigated parameters are water requirement for a given slump, air content, setting time of...
Use of Taguchi Optimization Technique in Pavement Concrete Mix Design
In a concrete mix design, there are many mix variables affecting the concrete performance. If all the mix variables are taken into account, it may be necessary to use the full factorial design of experiment to obtain the concrete in the desired mechanical properties. It means more need of material,...