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Alkali‐silica reaction performance testing of concrete considering external alkalis and preexisting microcracks
Author(s) -
Giebson Colin,
Voland Katja,
Ludwig HorstMichael,
Meng Birgit
Publication year - 2017
Publication title -
structural concrete
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.912
H-Index - 34
eISSN - 1751-7648
pISSN - 1464-4177
DOI - 10.1002/suco.201600173
Subject(s) - alkali–silica reaction , alkali–aggregate reaction , alkali metal , materials science , prism , composite material , fly ash , chloride , forensic engineering , geotechnical engineering , structural engineering , metallurgy , engineering , chemistry , cement , physics , organic chemistry , optics
In concrete elements, simultaneously subjected to cyclic loadings and external alkalis, the risk for damage caused by or under participation of an alkali‐silica reaction ( ASR ) is particularly high. This is of particular concern for concrete pavements due to the increasing heavy vehicle traffic and the application of sodium chloride ( NaCl ) de‐icer during winter. Since 2004, the climate simulation concrete prism test ( CS‐CPT ) has been used successfully to evaluate job mixtures for pavements by considering the impact of alkali‐containing de‐icers. However, the role of mechanical predamage on ASR is largely unclear. In a joint research project, the CS‐CPT has been used to investigate the influence of preexisting microcracks on ASR . It was evident that an ASR initiated earlier in the predamaged concrete prisms due to the more rapid ingress of NaCl solution through the microcracks.