کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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1518442 | 1511617 | 2007 | 5 صفحه PDF | دانلود رایگان |

Macro-defect-free (MDF) materials comprise a “hot topic” example in the field of cement-based materials and composites. The methods of MAS-NMR and thermal analysis gave key data for monitoring the scope of Al–O–P cross-links both in virgin MDF test pieces and in those exposed to moisture. The increased contents of calcium aluminate hydrates, calcium silicate hydrates and CaCO3 in moisture-attacked (as opposed to virgin) MDF probes have been detected by these methods. The controlling feedback from cross-links and interfaces to the extent of secondary interactions of MDF materials with out-door atmospheric humidity is evident. Data on both the next-nearest-neighbour (NNN) interactions and the thermal stability of cross-linked interfaces show that for MDF materials chemical knowledge is crucial to (i) procedure design; Al–O–P cross-linking is the key nano-scale aspect of the MDF formation process and (ii) exploitation; interfaces comprise compact and stable regions in which Al–O–P cross-links support moisture resistance in the MDF materials.
Journal: Journal of Physics and Chemistry of Solids - Volume 68, Issues 5–6, May–June 2007, Pages 1057–1061