Evaluation of Transition from Fluid to Elastic Solid of Cementitious Pastes with Bauxite Residue Using Oscillation Rheometry and Isothermal Calorimetry

Applied Rheology

Borges Gallo Jorge¹  Montini Marcelo¹  Liberato Caio Cesar²  Alba Cincotto Maria²  Giuliano Pileggi Rafael²  Oliveira Romano Roberto Cesar de² 

[1] Alcoa Latin America, Poços de Caldas,Minas Gerais, cep 37719-900, Brazil;Department of Civil Construction, University of São Paulo,São Paulo61548, Brazil;

关键词: oscillatory rheometry;    isothermal calorimetry;    cement paste;    bauxite residue;   

DOI  :  10.3933/applrheol-23-23830

来源: DOAJ

【 摘 要 】

This work evaluates the impact of using bauxite residue (BR) as filler addition in cementitious compositions, during the early ages of transformation from the viscous fluid phase to an elastic solid. Chemical reaction and consolidation (physical phenomena of hardening) were also correlated. The chemical reaction rate was accompanied using isothermal calorimetry and the consolidation measured using oscillatory rheometry (quantifying the storage modulus - G’ and relating with yield stress, σο). The results show that BR accelerates the cement hydration reaction, but in pastes with pure cement, consolidation was faster, showing a distinct effect on the fluidsolid transition.

【 授权许可】

Unknown