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Compositions of Solutions in Contact with Hydrating Tricalcium Silicate Pastes
Author(s) -
YOUNG J. F.,
TONG H. S.,
BERGER R. L.
Publication year - 1977
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.1151-2916.1977.tb14104.x
Subject(s) - nucleation , calcium hydroxide , crystal growth , induction period , ionic bonding , silicate , crystal (programming language) , calcium silicate , chemical engineering , chemistry , hydroxide , mineralogy , materials science , inorganic chemistry , crystallography , ion , organic chemistry , composite material , computer science , programming language , engineering , catalysis
The concentration of ionic species in the solution in contact with hydrating tricalcium silicate (C 3 S) has been studied as a function of time and in the presence of admixtures. The ionic product for calcium hydroxide (CH) was calculated as a function of time and correlated with calorimetric measurements and crystal growth data. The results support the hypothesis that nucleation of CH crystals controls the induction period and that their subsequent growth controls the second heat peak. The influence of admixtures can be predicted from their influence on CH crystal growth. However, solution data indicate that the system cannot properly be compared with the growth of pure CH; the combined role of C‐S‐H and CH must be considered. Some implications for C 3 S hydration are discussed.