A series of tests have been carried out to figure out the in-fluence of deviation of the dowels on concrete paving slabdowels with respect to slab movements through shrinking andthermal variations.The stresses produced in the slabs for various deviations withrespect to the theoretical position and according to the systemchosen to...
Design of Sand-Cement Base Courses Using Fracture Mechanics Principles
Sand-cement base courses exhibit shrinkage and fatigue crack-ing. Both types of cracks tend to reflect through the asphaltictop layers. An analysis has been made to determine pavementlife, which is defmed as the number of cycles until cracks arevisible at the pavement surface, by taking into account fatiguecrack initiation, propagation and...
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 Design of Concrete Block Pavements For Urban Roads
This design method for concrete block road pavements applies to block pavements (under normal road traffic), consisting of rectangular paving blocks (thickness ~ 80 mm) in herringbone bond, 50 mm crushed sand bedding layer, eventually an unbound base, and a sand sub-base. The design criterion for such pavements is rutting....
Data Base and Pavement Condition Surveys of Concrete Roads in the Shrp Long-Term Pavement Performance Study
The Long-Term Pavement Performance (LTPP) research program, a component of the Strategic Highway Research Program (SHRP), was launched in 1987 as a $50 million effort to collect field observations of both in-service and new, specially constructed test sections throughout North America. This paper deals primarily with the pavement distress evaluation...
Continuously Reinforced Concrete Overlay Worksites. Planning on Motorways in Service. High Output Production Equipment
Since 1983, most of the work sites in France using Continuously Reinforced Concrete have been for overlaying work on existing motorways in service. As regards methods and equipment, this has necessitated high output production facilities to allow work to be complete as quickly as possible so as to minimize inconvenience...
Behaviour of Rolled Compacted Concrete Results of Measurements in Experimental Pavements
Precise measurements on experimental ruil scale pavements demonstrate that curling and warping phenomena arc affecting similarly the RCC and the conventional PCC pavements of equivalent designs: with «light differences in deflections and joint openings mainly attributed to different adherence at the slab-base interface. After IS months exposed to drying shrinkage....
Considerations in the Design of Jointed Concrete Pavements
This paper provides considerations, recommendations, and guidelines on the design of jointed concrete pavements. These are based on the field performance results of 95 inservice con-crete pavement sections, on the results of a literature review,and on the experience of the authors. Key considerations in thedesign of concrete pavements are highlighted...
Concrete Paving in the UK One Contractors Experience and Approach Since 1983
dfred McAlpine Construction Ltd have constructed 20 kilometres of concrete carriageway using slipform pavers; 00 kilometres of which have been completed since 1983. This aper sets out the philosophy and experience of this firm with egard to the construction since 1983. It highlights the decision laking processes undergone at tender...
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...
High Strength Concrete For Highway Pavements Ano Bridge Decks
An accelerated road-wear simulator employed by Norcem for experimental testing of abrasion resistance of highway concrete pavements subjected to heavy traffic by studded tyres was set up at Slemmestad, Norway in 1985. By increasing concrete strength from 50 up to 120 MPa, the abrasion was reduced by roughly 60-70 %....
Precast Concrete Footway Paving Slabs That Resist Vehicular Overrun
This paper presents research into the design of square precast concrete paving flags ranging in plan size between 600 mm and 300 mm square. A design method for these paving flags overrun by vehicles is presented. The method shows that the existing test procedure underestimates the paving flag strength and...