2004/09/11 by F. Brunet, Ph. Bertani, Thibault Charpentier +2 · 1 citation
Chemistry · Engineering · Environmental Science · #Advanced NMR Techniques and Applications #Concrete and Cement Materials Research #Chemical Synthesis and Characterization #Homonuclear molecule #Heteronuclear molecule #Calcium silicate hydrate #Silicate #Chemistry #Proton #Solid-state nuclear magnetic resonance #Crystallography #Analytical Chemistry (journal) #Nuclear magnetic resonance spectroscopy #Materials science #Nuclear magnetic resonance #Molecule #Stereochemistry #Physics #Organic chemistry #Nuclear physics
paper · doi:10.1021/jp031174g
openalex publication_date 2004/09/11 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/30
Structural characterization of calcium silicate hydrate (C-S-H) is of major importance, as it is the main constituent of Portland cement and is responsible for its principal cohesion and durability properties. In this paper we apply homonuclear and heteronuclear solid-state NMR methods for the investigation of C-S-H. We use double quantum homonuclear 29 Si− 29 Si correlation using the BAck to BAck recoupling scheme to gain information about connectivity between silicates and 2D 1 H− 29 Si HETeronuclear chemical shift CORelation (HETCOR) to characterize the proton environment of the silicate chains. Our observations are in agreement with the tobermorite model and with previous results, but we get evidence of a continuous decrease of the silicate chain length with increasing Ca/Si ratio rather than a bimodal distribution of chain length.