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Reaction of Hydraulic Calcium Silicates with Carbon Dioxide and Water
Author(s) -
GOODBRAKE C. J.,
YOUNG J. F.,
BERGER R. L.
Publication year - 1979
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.1151-2916.1979.tb19112.x
Subject(s) - carbonation , aragonite , calcium silicate , calcite , carbon dioxide , silicate , calcium silicate hydrate , relative humidity , mineralogy , chemistry , chemical engineering , inorganic chemistry , materials science , cement , metallurgy , thermodynamics , composite material , organic chemistry , physics , engineering
The carbonation of wetted powders of beta‐dicalcium silicate (β·2CaO·SiO 2 =β‐C 2 S) and tricalcium silicate (3CaO·SiO 2 = C 3 S) was studied as a function of reaction conditions. The water/solids ratio is an important parameter and there is an optimum value for each silicate. Relative humidity and the partial pressure of CO 2 also strongly affect the reaction. The rate of carbonation can be conveniently represented by plotting the degree of carbonation against the logarithm of time. C‐S‐H and calcite are the initial reaction products. Subsequently, carbonation of the C‐S‐H produces silica gel, whereas aragonite may form if the system is allowed to dry out.