Processing-Moisture Resistance and Thermal Analysis of Macro-Defect-Free Materials |
| |
Authors: | Mojumdar S C |
| |
Institution: | (1) Institute of Inorganic Chemistry, Slovak Academy of Sciences, Dubravska Cesta 9, SK-842 36 Bratislava, Slovakia |
| |
Abstract: | The system of sulfoaluminate ferrite belite (SAFB) clinkers premixed with Portland cement (PC) in mass ratio 85:15 in combination
with hydroxypropylmethyl cellulose (HPMC) or polyphosphates(poly-P) was used for the syntheses of Macro-Defect-Free (MDF)
materials. The subsequent moisture treatment and thermal stability of these MDF materials were investigated. The effect of
individual humidity upon the evolution of mass is more intensive than the effects of composition of MDF materials or duration
of the original MDF material synthesis. Detailed values of mass changes at 100% relative humidity (RH) and under ambient conditions
are strongly affected by the nature of polymer used. A significant improvement of moisture resistance of MDF materials is
achieved when the materials are dried after 24 h of finishing the pressure application. In the inter-phase section of MDF
material samples, the content ofC-(A,F)-S hydraulic phases, mainly tetracalcium aluminate ferrite monosulphatehydrate (AFm) decomposing by 250°C and CaCO3 decomposing at 600–700°C increase after the moisture attack, while cross-links in AFm-like section with typical thermoanalytical
traces in temperature region 250–550°C remain intact.
This revised version was published online in July 2006 with corrections to the Cover Date. |
| |
Keywords: | Al(Fe)– O– C(P) cross-links MDF materials thermal stability moisture resistance |
本文献已被 SpringerLink 等数据库收录! |
|