The continuously-reinforced semi-rigid structure consists basically of a thick structural layer placed directly on the foundation when it is made of untreated, permeable materials, or on a draining layer of geotextile when it is treated. This layer is made of concrete having a low cement content and cracking is rnntrnlled...
Factors Affecting the Abrasion Wear of Concrete Pavements
This paper describes the application of a relatively simple and inexpensive laboratory test deiived Iiuiii ASTM procedure C779 for evaluating abrasion resistance of concrete surfaces. Factors affecting the reproducibility and precision of the test are quantified. The paper describes the use of the test to evaluate trial mixes of paving...
Noise Reduction on Concrete Paving Blocks
Today the people in the cities require, more than in former times, a nice looking but also noice reduced pavement. The aim of our one year trial in 1 9w92h,i ch was promoted by the Austrian innovation fund, was to fulfill the requirements mentioned above. 1200 m of new concrete...
Project Instrumentation Installation and Presentation of Results
This article presents the design criteria and operating procedures adopted for the installation of the instrumentation devices to record the variations in "sIowIy changing quantities affected by temperature and humidity as well as by traffic-induced dynamic" phenomena. Interesting trends and correlations between the various physical quantities measured have been found....
The Benefits to Turkey’s Economy of the Selection of the Pavement Superstructure
In this paper we discuss about how to select the best pavement type to minimize the pavement cost. It is studied which pavement type (flexible or rigid pavement alternatively) is more suitable for Turkey taking into account economic criteria. The most important parameters for choosing the type of pavement are...
Early Trafficking of Concrete Pavements – Practical Experience
Fast track paving has been a daily routine in Vienna since the early 80ies. To meet the requirements for opening to traffic (flexural strength at least 3.85 N/mm 2 ) quickly, super-plasticized concrete with a w/c-ratio below 0.42 is used and opened to traffic the second day after placing. If...
Application of Cement to Stabilize Used Materials in Hydraulic Bounded Subbases
In the last few years the interest for preventive environment measures has increased. That is the reason for stimulating the re-use of waste materials as a means of recycling. With the aim of stimulating the recycling of waste materials, the interest in using cement to stabilize different materials increased. This...
Study of the Impact of Vehicles against Concrete Barriers Delimiting the Area of Approach to Narrower Carriageways in Function of the Barriers Feature
This paper examines the influence of the different factors that affect the problem of the collisions against the concrete safety barriers used to delimit the area of approach to narrower carriageways. In particular we have studied the influence on the damage of the vehicle and the shear strength necessary in...
Continuously Reinforced Concrete for the Diamond-Shaped Toll Square and the Pavement of the Licfkcnshocktunnol in Antwerp (Belgium)
For the construction of the LIEFKENSHOEK-toll tunnel under the river Scheldt, the Flemish Road Administration has once again chosen CRCP, 20 cm thick, as the best solution for the pavement inand outside the tunnel. By also choosing CRCP for the 30.000 m 2 diamond shaped toll-square, it was possible to...
Fine-Grained (Sand) Concrete for the Construction of Cement Concrete Road and Airfield Pavements
The problem of using fine-grained (sand) concrete instead of the "classic one in the construction of road and airfield pavements is analysed. In sand concrete the coarse aggregate, crushed stone or gravel, are substituted by natural sand or a blend of natural sand and screenings 0.5 (10) mm. The use...
Experiences with Noise Reducing Surfaces for Existing Concrete Pavements
In Carinthia a surface dressing with epoxy resin as binder and chippings 3/4 mm has been used since 1989. The task was to get better noise reducing conditions of existing concrete pavements. The result can be seen in noise reducing properties of - 6 db(A) compared with the existing old...
Conclusions from the Longtime Behaviour of Cement Bound Road Bases
Cement-bound road bases of 16 heavily loaded Autobahns in West Germany (12 road bases under concrete pavements and 4 under asphalt pavements) were investigated regarding bond, damage due to frost and erosion, compressive strength, water permeability, frost and erosion resistance. The investigations showed that cement-bound road bases are proved in...