In 1985 four trial sections of two-lane concrete pavement were laid in Zimbabwe. The purpose was to provide a data base for the preparation of appropriate design and maintenance specifications, suitable for the conditions found over a large part of Africa, namely, good subgrades, moderate rainfall, large temperature variations, low...
A Programme of Comparative Tests on Plain Fabric Reinforced & Fibre Reinforced Concrete Ground Slabs
This paper reports on the first phase of a test programme which compares the performance of concrete ground slabs with (a) no reinforcement, (b) steel fabric reinforcement, (c) steel fibre reinforcement and (d) polypropylene fibre reinforcement. The slabs were 3.0m square, 0.15 and 0.13 m deep and subjected to a...
The Reconstruction of a Special Lane in Continuously Reinforced Concrete For Slow Vehicles on the A6 Along the Mountain Pass of Bessey En Chaume
Two different pavement structures as part of one and the same transverse profile, or a specific treatment for a slow lane extremely liable to rutting.
High Strength Roller Compacted Concrete
The present paper is devoted to the development of high strength, frost resistant roller compacted concrete. Effects of using silica fume, superplasticizer and air-entraining admixture in Ree are investigated in a comprehensive laboratory research program. It is demonstrated that it is possible through the use of these additives to achieve...
Design Practice of Concrete Pavements in China
A brief review of China's practice on structural design of concrete pavements is presented. The designmethodology adopted controls the combined fatigue damage due to repeated traffic loading and fluctuating temperature gradient, and solves the loading and thermal warping stresses by using the finite element method, based on a mechanistic mo-del...
Modern Construction of Concrete Pavements For Expressways in Spain
In this paper, basic characteristics of concrete pavements constructed in Spain during the last years, corresponding to the General Highway Plan 1984-1991, are described. The main solutions adopted to get a concrete pavement with high strength and appropriate texture are an~)ed. The solutions used in the construction in cold weather...
Noise Reducing Concrete Surface. a Model For Assessment
me of the attributes required from a pavement is a noise redu-ing effect. But an optimization of this attribute without con-idering other important requirements as stability and pos-ibilities for patching, reinstatement and environmentaliaintenance is contrary to all national economic principles. Inact it is the road user who is running the...
The Chemical Characterization of Admixtures For Cement Concrete
Although the Belgian standards provide for quality control of idrnixtures for cement concrete, it is interesting to complement his information by a more thorough chemical identification. this makes it possible to increase the economic advantages vhich result from their use. nfrared spectrographic investigation, which enables the ategory of basic chemical...
Concrete Pavements on Industrial and Port Areas the Belgian Experience
The relative improvement of the economic situation, the growing transport by trucks and the increasing use of containers have created an important need for durable pavements, with very low maintenance cost. Due to the rich Belgian experience with concrete roads, many companies prefer to use concrete for surfacing industrial and...
Reflective Cracking on Concrete Pavements with Cement Treated Sub-Base
One concrete pavement just built was showing some located transverse cracking. In order to evaluate the cracking cause, longitudinal displacements were measured in some cracks and transverse joints. Results obtained showed that concrete cracking was reflected from cement treated base cracks, and allowed to verify that such phenomena happened in...
Cement Concrete Pavement on Granular Base Course of Graduated Concrete-Recycling-Ma Terlal
The hitherto used standard building method using hydraulic bound regulating and base course has been criticised for frequently faiîing. If existing concrete pavements are rehabilitated, the old road structures have to be involved into the new wearing system, so that the required bearing capacity E, ~ 50 Nz'mnr' may be...
Experimental Study of the Strain Modulus of Compacted Concrete
In this paper the results of several experimental studies carried out in order to determine some properties of RCC are described. These properties are important to design and to control RCC pavements: - comparison between strain modulus of different RCC and vibrated concrete mixes whose mechanical strength were similar; proposal...