Figure 3From: Transformation of meta-stable calcium silicate hydrates to tobermorite: reaction kinetics and molecular structure from XRD and NMR spectroscopy29Si MAS NMR (a) and 27Al MAS NMR (b) of tobermorite that had been reacted for t = 24 h (solution:solid 5:1). 29Si MAS NMR shows Q2 and Q3 Si-O-Si and Si-O-Al chain linkages while 27Al MAS NMR shows two structurally distinct [4]Al coordination sites from Al in bridging and branching bonds.Back to article page