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Specific Surface of Hardened Portland Cement Paste as Determined by Small‐Angle X‐Ray Scattering
Author(s) -
WINSLOW D. N.,
DIAMOND S.
Publication year - 1974
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.1151-2916.1974.tb10856.x
Subject(s) - portland cement , materials science , composite material , relative humidity , yield (engineering) , cement , scattering , specific surface area , humidity , mineralogy , optics , chemistry , thermodynamics , biochemistry , physics , catalysis
Small‐angle X‐ray scattering was used to determine the specific surfaces of hardened portland cement pastes subjected to various treatments. Reasonably mature pastes yielded values of the order of 700 m 2 /g of ignited paste when examined in the original saturated condition. Drying to an intermediate relative humidity, P‐drying, and D‐drying reduce the surface areas to values of the order of 200 to 300 m 2 /g, but vacuum resaturation results in recovery of all the lost surface. Oven drying produces an additional loss in surface area, and in this case recovery on resaturation is not quite complete. The effect of w/c ratio appears to be minor, and pastes of hydrated C 3 S yield essentially the same surface areas as corresponding portland cement pastes.