Journal Title: Hemijska Industrija
ISSN: 0367-598X (Print); 2217-7426 (Online)
Publisher: Association of Chemical Engineers of Serbia
LCC Subject Category: Technology: Chemical technology
Country of publisher: Serbia
Language of fulltext: Serbian, English
Full-text formats available: PDF
Marina Biljana S.
Brezovska Snežana S.
Burevski Dončo K.
Panova Biljana I.
Abstract | Full Text
Adsorption isotherms of benzene on hydrated cement pastes prepared by cement ground with and without the addition of grinding aids, triethanol amine (TEA) and ethylene glycol (EG) were investigated. The adsorption isotherms were interpreted by means of the Dubinin-Astakhov (DA) and Dubinin-Radushkevich-Stoeckli (DRS) equations. The microporous structure of cement gel (C-S-H) in the cement pastes, and changes in the Gibbs free energy of adsorption were determined. The mechanical properties of the cement pastes were also measured. It was evident that pastes with additives had different parameters of the DRS and DA equations: the volume and dimensions of the gel pores, the distribution of the dimensions, the characteristic energy of adsorption, and the change in the Gibbs free energy of adsorption. The mechanical properties were also different. The dispersity of the additive-containing ground cements had a favorable effect on the hydration processes. When applying TEA, it was also necessary to analyze its influence on the chemical behavior of hydration in the starting period.