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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.)

Using isothermal calorimetry, X-ray diffraction, thermogravimetry and FTIR to monitor the hydration reaction of Portland cements associated with red mud as a supplementary material

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Author(s):
de Oliveira Romano, Roberto Cesar [1] ; Bernardo, Heitor Montefusco [1] ; Maciel, Marcel Hark [1] ; Pileggi, Rafael Giuliano [1] ; Cincotto, Maria Alba [1]
Total Authors: 5
Affiliation:
[1] Univ Sao Paulo, Dept Civil Construct Engn, Av Prof Almeida Prado, Trav 2, 83, BR-05424970 Sao Paulo, SP - Brazil
Total Affiliations: 1
Document type: Journal article
Source: JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY; v. 137, n. 6, p. 1877-1890, SEP 2019.
Web of Science Citations: 3
Abstract

This study is part of a global project to find some large-scale application for red mud. A previous work confirmed that the use of RM as partial substitution for cement can affect its rheological properties; however, it is possible to produce cementitious materials without lose mechanical performances at harden state. The main goal of the work was to assess the impact of red mud (RM) as replacement of different Brazilian Portland cements by monitoring the formation of hydrated products over time, by thermogravimetry, X-ray diffraction and FTIR. Results show that the presence of RM increases the induction period, the gypsum and portlandite consumption as well as the amount of ettringite and monosulfoaluminate produced. The formation of sodium silicoaluminate hydrate (NASH) was also observed, regardless the kind of cement, as a result of the reaction with aluminates and silicates from the binder. (AU)

FAPESP's process: 12/19262-2 - Evaluation of physical-chemical interaction of bauxite residue and Portland cement
Grantee:Roberto Cesar de Oliveira Romano
Support Opportunities: Scholarships in Brazil - Post-Doctoral