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Effect of Treatment of Reactive Aggregate by H 2 O 2 on the Alkali‐Silica Reaction
Author(s) -
Hibino Takeshi,
Tsuyuki Naomitsu,
Ishida Hideki
Publication year - 1994
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1994.tb09751.x
Subject(s) - hydrogen peroxide , oxidizing agent , alkali metal , alkali–silica reaction , aggregate (composite) , mortar , x ray photoelectron spectroscopy , chemistry , peroxide , inorganic chemistry , materials science , chemical engineering , organic chemistry , composite material , engineering
A method of controlling the alkali‐silica reaction by treating a reactive aggregate with a solution of hydrogen peroxide was investigated. Mortar bars made using the hydrogen peroxide‐treated aggregate exhibited no expansion after 12 months, indicating that the alkali‐silica reaction was suppressed. Study of the state of bonding of Si in the aggregate using XPS showed that the Si‐O bond energy indicating glassy SiO 2 (102.7 eV) before treatment had changed to crystalline SiO 2 (103.2 eV) after hydrogen peroxide treatment. This indicates that the strong oxidizing potential of hydrogen peroxide stabilizes the silica in the reactive aggregate and thus suppresses the alkali‐silica reaction.