CONCRETE

[:ru]Дебро P.[:en]Debroux, R.[:] [:ru]председатель подкомиссии PIARC по бетонным покрытиям, Брюссель, Бельгия[:en]Chairman of Sub-comittee on Concrete Pavements, PIARC, Brussels, Belgium[:]

Alitinform №1 (33) 2014 г. 68-83 p.

Abstract

Concrete pavement surfaces reach a high durability and good long-term performance. To ensure this, long-life constructions, sufficient design, qualitatively high-grade execution and the necessary maintenance are needed.
The construction method is regionally employed to very different extends. Hence, the experiences concerning the maintenance measures differ greatly. An international exchange of experiences took place only to a very limited extend. In order to improve the situation, the World Road Association PIARC has taken an interest in this topic. The Subcommittee D2c “Concrete Roads” was, under the title “Issue 2: “Improved Maintenance Methods”, given the task to identify the best maintenance measures for concrete pavement surfaces.
Initially, a survey was conducted in which 35 countries, or 56 % of the land surface of the earth, participated. The complete network of paved roads contains 26 mln km, of which 2 mln, or 7.7 %, are concrete roads. Hence, in the respective countries, the experiences with preservation measures of concrete pavements are correspondingly large.
Maintenance measures are being conducted in order to maintain, restore or adapt the road to increase traffic volume. They start by determining the condition within regular intervals. In doing so, the characteristic features of the pavements structures are depicted and illustrated. Damages and deficiencies are qualitatively and quantitatively being captured. This can be done visually, metrological and by means of additional tests, for example core tests, bearing capacity measurement or the detection of cavities. Besides the determined condition or the damage, the aspired remaining usage of the road construction has to be considered.
All maintenance measures gathered in the framework of the survey have been analyzed and the best are tested and determined here.