Title:
Assessing the Durability of Concrete Regarding ASR
Author(s):
J. Stark and C. Giebson
Publication:
Symposium Paper
Volume:
234
Issue:
Appears on pages(s):
225-238
Keywords:
alkali-silica reaction (ASR); durability; performance-test; slow/late aggregates
DOI:
10.14359/15939
Date:
3/22/2006
Abstract:
The alkali-silica reaction (ASR) was recognized by Stanton in 1940 and is still today a world-wide problem. The basic reaction mechanisms are reasonably well understood and in many cases a prevention of the ASR is possible. However, there are still severe damages on concrete structures caused by alkali-silica reaction, especially related to slow/late aggregates. This paper presents the experiences with the German Alkali-Guideline during the past decades in Germany and introduces latest approaches in developing forward-looking test methods to assess the durability of concrete regarding ASR due to alkali-reactive slow/late aggregates. The emphasis is particularly placed on assessing the influence of an external alkali supply, i.e. the impact of de-icing solutions, on pavement concretes. For this purpose the cyclic climate storage was used and proved as appropriate method.