Title:
Effect of D-gluconate on Nucleation and Growth of Synthetic Calcium Silicate Hydrate (C-S-H)
Author(s):
Jirawan Siramanont and Paul Bowen
Publication:
Symposium Paper
Volume:
329
Issue:
Appears on pages(s):
403-414
Keywords:
calcium silicate hydrate; D-gluconate; precipitation; morphology; agglomeration
DOI:
10.14359/51711230
Date:
9/26/2018
Abstract:
Calcium Silicate Hydrate (C-S-H) was synthesized with and without D-gluconate in controlled conditions and environment via a dropwise precipitation method. The presence of D-gluconate seems to affect the synthetic C-S-H precipitation. D-gluconate can adsorb on C-S-H and also complex with Ca2+ in solution. The C-S-H stoichiometry in the presence of D-gluconate is different to pure the synthetic C-S-H. The underlying structure of all samples characterized by FTIR and XRD are similar. With the ddition of D-gluconate the C-S-H showed higher weight losses (0.8-4.7%) than the pure synthetic C-S-H. Primary particles show a nanofoil-morphology with or without addition of D-Gluconate.. The D-gluconate modifies the agglomeration patterns, forming hollow square or cuboid aggregates. Higher concentrations of D-gluconate in synthetic C-S-H accentuate this square aggregate shape possibly because of a preferential adsorption onto the synthetic C-S-H basal plane.