Model C-S-H structure represented by 14Å14Å tobermorite in …
Özçelik and White used the model 14 Å tobermorite structure as the crystalline analogue of C-S-H gel to study the impact of alkalis and Al substitution on the thermodynamics of this phase [89...
The real structure of tobermorite 11Å - GeoScienceWorld
It was found that three distinct phases exist, corresponding to three degrees of hydration, tobermorite 9Å (riversideite), tobermorite 11Å (tobermorite s.s.), tobermorite 14Å (plombierite) (McConnell, 1954), characterised by different d 002 values in the powder diffraction pattern, 9.3 Å, 11.3 Å, 14.6 Å, from the least to the most ...
Tobermorite/jennite- and tobermorite/calcium hydroxide-based …
2004年9月1日 · On the T/CH viewpoint they occur in layers of CH sandwiched between silicate layers of tobermorite-like structure whilst on the T/J viewpoint they form part of the main layer of jennite-based structural units (as Si–O–Ca–OH).
A comprehensive review of C-S-H empirical and computational …
2022年6月1日 · These empirical models aimed to describe the C-S-H gel structure by comparison with related crystals like portlandite or the tobermorite family and often included stoichiometric formulas. The second group covers the more detailed atomic-scale models developed in the last decade using computational simulations.
The Crystal Structure of Tobermorite 14 Å (Plombierite
2005年3月1日 · The structure of tobermorite 14 Å is built up of complex layers, formed by sheets of sevenfold coordinated calcium cations, flanked on both sides by wollastonite-like chains.
Proposed C-S-H structure model with a tobermorite-type layer structure …
The C-S-H have a tobermorite-type layer structure. Each layer consists of central calcium and oxygen atoms sandwiched by silicate tetrahedral chains. Additional calcium and water are located...
A Structural Study of Dehydration/Rehydration of Tobermorite, …
2002年1月1日 · We have investigated the structure and the dehydration/rehydration process of Tobermorite-like Calcium Silicates Hydrates (CSH) by using High Resolution Transmission Electronic Microscopy (HRTEM) and a new in-situ temperature and pressure controlled X-Ray Diffraction set up.
The Crystal Structure of Tobermorite 14 A (Plombierite), a CSH …
The structure of tobermorite 14 Å is built up of complex layers, formed by sheets of sevenfold coordinated calcium cations, flanked on both sides by wollastonite-like chains.
Tobermorite is a hydrated calcium silicate, structurally related to the C–S–H com-pounds, the main binding product of Portland cement. The story of tobermorite 11A and tobermorite group started in 1880 when Hed-˚ dle described a hydrate calcium silicate found in …
[PDF] The crystal structure of the 11 Ä natural tobermorite …
The crystal structure of a natural tobermorite from Zeilberg, Maroldsweisach, Germany (average formula Ca2.2s[Si307.s(OH)1.5]'1 H20), is solved using the data obtained from an automatic diffractometer. For the structure determination only the sharp main reflexions are considered.