Nanostructure of calcium silicate hydrates in cements.
Calcium silicate hydrate (CSH) is the major volume phase in the matrix of Portland cement concrete. Total x-ray scattering measurements with synchrotron x rays on synthetic CSH(I) shows nanocrystalline ordering with a particle diameter of 3.5(5) nm, similar to a size-broadened 1.1 nm tobermorite crystal structure. The CSH component in hydrated tricalcium silicate is found to be similar to CSH(I). Only a slight bend and additional disorder within the CaO sheets is required to explain its nanocrystalline structure.
Skinner
L B
LB
Department of Civil and Environmental Engineering, University of California, Berkeley, California 94720, USA.
Chae
S R
SR
Benmore
C J
CJ
Wenk
H R
HR
Monteiro
P J M
PJ