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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Gluconate action in the hydration of calcium aluminate cements: Theoretical study, processing of aqueous suspensions and hydration reactivation

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Author(s):
dos Santos, Jr., T. [1] ; Pereira, I, C. ; Goncalves, R. [2] ; Salvini, V. R. [3] ; Zetterstrom, C. [4] ; Wohrmeyer, C. [4] ; Parr, C. [4] ; Pandolfelli, V. C. [5]
Total Authors: 8
Affiliation:
[1] Univ Fed Sao Carlos, FIRE Associate Lab, Mat Microstruct Engn Grp GEMM, Mat Engn Dept, Rodovia Washington Luis, Km 235, BR-13565905 Sao Carlos, SP - Brazil
[2] Univ Fed Sao Carlos, Ctr Dev Funct Mat CDMF, Chem Dept, Rodovia Washington Luis, Km 235, BR-13566905 Sao Carlos, SP - Brazil
[3] Coll Technol FATEC Sertaozinho, Jordao Borghetti St 480, BR-14160050 Sertaozinho, SP - Brazil
[4] FIRE Associate Co, Imerys Technol Ctr ITC Lyon, Le Chatelier St 1, ZAC Parc Technol, F-38090 Vaulx Milieu - France
[5] Pereira, C., I, Univ Fed Sao Carlos, FIRE Associate Lab, Mat Microstruct Engn Grp GEMM, Mat Engn Dept, Rodovia Washington Luis, Km 235, BR-13565905 Sao Carlos, SP - Brazil
Total Affiliations: 5
Document type: Journal article
Source: Journal of the European Ceramic Society; v. 39, n. 8, p. 2748-2759, JUL 2019.
Web of Science Citations: 0
Abstract

Considering the production of stable CAC aqueous suspensions, this work addressed the action of gluconate anion as a Ca2+ complexing agent and retarder of CAC hydration. Using quantum simulations, the complexation energy of gluconate complexes was calculated. The pH range of stability for the complexes was estimated and aqueous suspensions containing CAC and sodium gluconate (NaG), stable up to 4 days at room temperature, were prepared. Afterwards, their hydration reactions were reactivated by adjusting the systems' pH. Results of solidification kinetics and mineralogical characterisation highlighted that, after reactivation, calcium aluminate hydrates were formed. Thermodynamics simulations indicated that using NaG up to 1 wt% would not be deleterious to the systems refractoriness up to 1700 degrees C. These systems could be applied in less explored processing routes for CAC-based refractory compositions (e.g. slip casting, direct foaming and additive manufacturing), resulting in innovations to produce advanced refractory ceramics. (AU)

FAPESP's process: 13/07296-2 - CDMF - Center for the Development of Functional Materials
Grantee:Elson Longo da Silva
Support Opportunities: Research Grants - Research, Innovation and Dissemination Centers - RIDC