Effect of polyethylene glycol on the rheological properties and heat of hydration of alkali activated slag pastes

Construmat 2018

Mikhailova, O.^1 ; Rovnanik, P.^1

Faculty of Civil Engineering, Brno University of Technology, Veveri 95, Brno, Czech Republic^1

关键词: Alkali activated slags;    Heat of hydration;    Newtonian model;    Polymer dosage;    Rheological behaviour;    Rheological measurements;    Rheological parameter;    Rheological property;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/385/1/012037/pdf
DOI  :  10.1088/1757-899X/385/1/012037

来源: IOP

【 摘 要 】

In this work the effect of two types of polyethylene glycol on the rheological properties of alkali activated slag pastes have been investigated. Polyethylene glycols were incorporated in the alkali activated slag pastes in quantities ranging between 0.5 and 5% by mass of slag. All rheological measurements were performed on all pastes with water-to-slag ratio of 0.4. Rheological parameters (shear stress and viscosity) of obtained fresh pastes were studied. Rheological behaviour of pastes modified with polyethylene glycols fits the Newtonian model. In this study also isothermal calorimerty test were performed with different amount of polyethylene glycols concerning time. Results showed that the heat flow generally decreases with increasing polymer dosage.