crystal atomic structure of inorganic compoundsmineralsnuclear magnetic resonanceshort-range ordersilicon compounds/ Ca 5Si 6H 2O 184H 2 Omineralmagic angle spinning nuclear magnetic resonance spectroscopyAl-substituted tobermoritesSolid-state27Al and29Si NMR spectroscopy with magic angle spinning (MAS) ...
Richardson, I.G.: Tobermorite/jennite- and tobermorite/calcium hydroxide-based models for the structure of C-S-H: applicability to hardened pastes of tricalcium sili- cate, 尾-dicalcium silicate, Portland cement, and blends of Portland cement with blast- furnace slag, metakaolin, or silica fume...
However, the relationship between carbonation shrinkage and change of tobermorite-11Å crystal structure has not been reported. We studied the mechanism of carbonation shrinkage of AAC, carbonated under an accelerated condition, with 29Si MAS NMR spectroscopy. We also studied the carbonation shrinkage ...
27 Al and 29 Si magic angle spinning nuclear magnetic resonance spectroscopy revealed that the maximum amount of Al that can be substituted for Si in the tobermorite structure is 15 to 20 mol%. Powder X-ray diffraction and cation exchange studies corroborate the above finding. Anomalous ...
The results showed that Sr~(2+) can replace Ca~(2+) in calcium silicate hydrate (CSH) gel to form solid solution and make the structure ofCSHgel more disordered under the experimental conditi. 结果表明:在实验条件下,Sr2+能取代水化硅酸钙凝胶中Ca2+而形成固溶体,并使CSH凝胶结构更趋无序;SrO能...
(2010) Preliminary study of calcium silicate hydrate (tobermorite) as crystal material to recover phosphate from wastewater. Desalination & ... JQ Jiang,L Wu - 《Desalination & Water Treatment》 被引量: 25发表: 2010年 Structure of Calcium Silicate Hydrate (C-S-H): Near-, Mid-, and Far-...
Tobermorite/jennite- and tobermorite/calcium hydroxide-based models for the structure of C-S-H: applicability to hardened pastes of tricalcium silicate, β... Tobermorite/jennite- and tobermorite/calcium hydroxide-based models for the structure of C-S-H: applicability to hardened pastes of ...
In crystals and glasses of silica-alumina systems, highly condensed aluminate tetrahedra may lead to geometric distortion, loss of vibrational coherence and observed band structure (McMillan and Piriou 1982; McMillan et al. 1982). Substantial Q2(1Al) relative to Q2(0Al) occurs in 29Si and 27...
-CaSi03).Atthattime,noneofthesestructureshadbeendetermined,andanimportantadvanceoccurredwhenDornberger-Schiff,LiebauandThilo(1954;Liebau,1956a) determinedthestructureofMaddrell'ssalt,apolymorphofNaAs03,whichtheyshowedtobeisostructuralwithoneofthepolytypesofwollastonite.Thelatterwasthusfoundtocontaininfinitechainsof...
from the structure of 1.4 and 1.1 nm tobermorite, Brunauer (6). An idealized structure for 1.1 nm tobermorite is presented in Figure 1(a). Later, Taylor suggested that the C-S-H in hydrated cement contains elements of structure derived from both ...