Clients and contractors all over the world are aiming to reduce construction cost by using less expensive construction material and applying new, more economic construction methods. This is a continuous challenge to the manufacturers of construction machinery to modify existing machines or develop new ones to meet the contractor's requirements....
A New Design Method For Control of Cracking in Continuously Reinforced Concrete Pavement
Reinforcement stress and crack width has been in-vestigated in full scale experimental pavement ofContinuously Reinforced Concrete Pavement forthree years. The validity of designequation for pre-dicting crack width distributed through the thick-ness of the slab and reinforcement stress etc.,which is based on bond stress -slip relationshipconsidering the effect of both concrete...
A Contribution to the Study of Joints on Concrete Pavements
vlaterials used as joint sealants on concrete pavements are zenerally classified in: - Preformed sealants. - Field molded sealants. l'his work shows the demanded characteristics for preformed .ealants and field molded sealants. The last ones are divided in :wo types: thermosetting -two component systems- coldap-rlied, and thermoplastics --one component- bot...
Economic Analysis of Cement Fly Ash Bound Materials
In order to design a cement bound mixture for use in base/sub-base pavement layers, it isusually re-quired to obtain a certain minimun strength value.Ifonly one type of binder isused, the problem hasonly one restriction and one variable, so, one onlysolution. However, if more binders are added tothe mixture, asit happens...
Developments in Noise Redution of Concrete Roads in the Netherlands
In the Netherlands experiments have been performed recently :onceming noise reduction on concrete roads. Three pos-.ibilities are being investigated:I. Top layer of no-fines porous concrete.~. Surface of washed dense concrete.. Dense concrete with fine-grained epoxy surface treatment. noise emission level slightly higher than on porous asphalt,iut much less than on...
The Passage of State Roads Through Built-Up Areas. Applications of Concrete Block Pavements
In the eighties, a campaign was set up in Belgium in view of the rearrangement of the state road sections which are passing through built-up areas. These projects were meant to improve the road safety and the viability along these cross town links. Efforts were made to come to a...
The Potential of Thinner Concrete Pavements: Evidence from Accelerated Testing
Overseas thin concrete slabs have been used successfully and have been shown to be economic. To evaluate the suitability of this type of construction under South African conditions, four experimental sections were constructed to evaluate the interaction of slab thickness and subbase thickness and quality. The sections were trafficked with...
Proposed Test Method For a Procedure to Stitch Longitudinal Weakened Plane Joints in a Plain Jointed Portland Cement Concrete Pavement Where Tie Bars Were Ineffectivel Y Located During Construction
The method used to conduct pull-out tests on tie bars cast into the edge of an existing concrete pavement is described. The test results are used in conjunction with a simple statical procedure to design an economical system for stitching sections of longitudinal weakened plane joints in a plain jointed...
Widening of Concrete Roads with Porous Concrete Bases
This paper assesses the condition of a concrete motorway pavement in the Paris region to be widened from three to four lanes from the outside. The sigilificant drainage requirements of the existing pavement led to the provision of a new porous pavement. The design criteria applied for the typical crosssection...
Experience with Rolled Concrete For Traffic Areas in the Federal Republic of Germany
Traffic areas are being executed to an increasing degree with roller compacted concrete. This concerns a concrete which is transported with earth-moving equipment, installed and compacted. To gather experience on concrete technology, test fields were laid. Furthermore, within the framework of a quality assurance program, comprehensive tests were performed on...
New Concrete Pavement Structures in the Revision of the French Catalogue of New Pavements and in the Technical Guide of Overlays
The documents for conception and design of new and reinforcement works on the French national road network were updated in 1988to take into account new pavement designs and techniques: dowelled slabs, continuously reinforced concrete, thick slabs on porous course, cement processed materials subbases. The article explains: - the development of...
Setting New Standards in the Construction of Flight Operation Areas in MUC 2
The construction of the International Airport MUC 2 and especiallyof the flight operation areas in -for road designers- gigantic dimensions and short time-limit was a unique chance for the ex-perts to search for and find newstandards for tech-nique, economy and quality by an innovative fur-ther development of proven equipment and...