By Pietro Vincenzini, Cristina Leonelli
The 26 peer-reviewed papers amassed right here jointly provide a plenitude of updated details on “Geopolymers and Geocements: Low Environmentally impression Ceramic Materials”. The papers are with ease prepared into education, CHARACTERIZATION, INDUSTRIALIZATION & APPLICATION.
This unique quantity has additionally been released on-line within the sequence, “Advances in technological know-how and expertise” Vol. sixty nine through www.scientific.net.
The Congress is being documented in 10 topical volumes. This 8th quantity covers education, characterization, industrialization, and alertness of the 2 varieties of ceramics. The keynote lecture is The prestige and Prospect of analysis and alertness of Alkali-Activated fabrics, through Pavel Krivenko (binders and fabrics, Kiev nationwide U. of Civil Engineering and structure, Ukraine). one other 25 papers give some thought to such subject matters as geopolymer binders in composite cements and ceramic-like fabrics, the position of alkaline cations in geomaterial foams, new geopolymers in line with electrical arc furnace slag, bond strengths in geopolymer and cement concretes, and recycling commercial wastewater by means of immobilizing it in geopolymer cement.
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Additional resources for 12th INTERNATIONAL CERAMICS CONGRESS PART H. Geopolymers and Geocements: Low Environmentally Impact Ceramic Materials
Molecular structure of HO-Si(OM)3 b. 2 Optimized molecular structure model of HO-T(OM)3 (T represents Si or Al) Na+ O K+ OH O Si a. Molecular structure of (OH)3Si-(Si(OH) 2O)3-Si(OH)2-ONa Si b. Molecular structure of (OH)3Si-(Si(OH) 2O)3-Si(OH)2-OK OH OH O O K+ Na+ Al Al c. Molecular structure of − − OH − d. 43KJ/mol). It is also found that dissolution in NaOH exhibit higher heat releasing than that in KOH (|∆E1|>-∆E2, |∆E3|>|∆E4|, |∆E5|>|∆E6|, |∆E7|>|∆E8|), which means that NaOH favors the dissolution of MK.
By using MAS-NMR techniques, McCormick et. al [22-24] and Swaddle et. al  also found that alkali metal cation of smaller size favor ion-pairing reaction with silicate monomer species in alkaline solution, which is consistent with our calculated result. 46 12th INTERNATIONAL CERAMICS CONGRESS PART H |∆E1|<|∆E5|, -∆E2<|∆E6| show ion-pairing reaction between HOAl−O3≡ and M+ is stronger than that between HOSiO3≡ and M+ in the same strongly alkaline solution. 10 KJ/mol (|△E7|-|△E5|)-(|△E8|-|△E6|).
4. 1 Reorientation pathways In this study the reorientation reaction among two or three ion clusters HOT(OM)3 (T represents Al- or Si, M represents Na or K) was taken as an example to investigate the possible reorientation pathways and the structural configuration of the reorientation products. From the thermodynamic point of view, three types of reorientation pathways can possibly take part in the reorientation process of two ion clusters as modeled in equations (9) to (11). The Lowenstein aluminum avoidance principle sates that, whenever two tetrahedral are linked by one oxygen bridge, only one can be occupied by Al and there can hence be no Al-O-Al bridges .