Durability of concrete pavements of recycled concrete (VSS2008/404_OBF)
Overview
Objectives:
The aim is to use more concrete aggregates (from used concrete pavements) for the manufacture of new concrete pavements. More than 18 years ago a concrete pavement, made from recycle concrete, was placed at the section Oberriet-Haag on highway A13, which will provide valuable experience. On this section investigations will be carried out on recycled concrete containing different amounts of concrete aggregates and the long-term behaviour examined.
Based on the results, the standards for recycling of concrete (SN 670 143) will be checked and probably revised.
Methodology:
From the recycled concrete road sections and from the adjacent section with concrete from natural aggregates cores are removed, visually, chemically and physically examined and evaluated. In particular, on:
- Capillary water absorption
- Frosttaumittelbeständigkeit (diagnostic and physical determination)
- Chloride entry
- AAR (alkali-aggregate reaction)
- Compressive strength of concrete
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