EVALUATION OF TRANSITION FROM FLUID TO ELASTIC SOLID OF CEMENTITIOUS PASTES WITH BAUXITE RESIDUE USING OSCILLATION RHEOMETRY AND ISOTHERMAL CALORIMETRY

被引：23

作者：

de Oliveira Romano, Roberto Cesar ^{[1
]}

Liberato, Caio Cesar ^{[1
]}

Montini, Marcelo ^{[2
]}

Gallo, Jorge Borges ^{[2
]}

Cincotto, Maria Alba ^{[1
]}

Pileggi, Rafael Giuliano ^{[1
]}

机构：

[1] Univ Sao Paulo, Dept Civil Construct, BR-61548 Sao Paulo, Brazil

[2] Alcoa Latin Amer, BR-37719900 Pocos De Caldas, MG, Brazil

来源：

APPLIED RHEOLOGY | 2013年 / 23卷 / 02期

关键词：

oscillatory rheometry; isothermal calorimetry; cement paste; bauxite residue; HYDRATED PORTLAND-CEMENT; CALCIUM-CHLORIDE; PORE STRUCTURE; RED; ADSORPTION; RHEOLOGY;

D O I：

10.3933/ApplRheol-23-23830

中图分类号：

O3 [力学];

学科分类号：

08 ; 0801 ;

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, sigma(o)). 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 fluid-solid transition.

引用

页数：10

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