This paper reports on the analysis of the hydration kinetics of a tricalcium silicate paste cured in presence of polymers industrially used in the extrusion process of mortars. In particular, we investigated the effect of a rheology-modifying additive (a methyl hydroxy ethyl cellulose) and a superplasticizer (a polyacrylic polymer). These polymers have been added to tricalcium silicate paste, both separately and together, to understand their distinct influence on the tricalcium silicate hydration and their possible synergies. The kinetic curves have been monitored from 10 to 40 °C by means of Differential Scanning Calorimetry and fitted using the generalized Boundary Nucleation and Growth Model combined to a diffusion-limited model, to extract: induction times, reaction rates, activation energies and diffusion coefficients. As a main result, this paper contributes to the advancement of the knowledge in the field of the extrusion process of cementitious materials, providing a thermodynamic support to the empirical evaluations of the additives performances.

Influence of acrylic superplasticizer and cellulose-ether on the kinetics of tricalcium silicate hydration reaction / Francesca Ridi;Emiliano Fratini;Roberta Alfani;Piero Baglioni. - In: JOURNAL OF COLLOID AND INTERFACE SCIENCE. - ISSN 0021-9797. - STAMPA. - 395:(2013), pp. 68-74. [10.1016/j.jcis.2012.12.048]

Influence of acrylic superplasticizer and cellulose-ether on the kinetics of tricalcium silicate hydration reaction

RIDI, FRANCESCA;FRATINI, EMILIANO;BAGLIONI, PIERO
2013

Abstract

This paper reports on the analysis of the hydration kinetics of a tricalcium silicate paste cured in presence of polymers industrially used in the extrusion process of mortars. In particular, we investigated the effect of a rheology-modifying additive (a methyl hydroxy ethyl cellulose) and a superplasticizer (a polyacrylic polymer). These polymers have been added to tricalcium silicate paste, both separately and together, to understand their distinct influence on the tricalcium silicate hydration and their possible synergies. The kinetic curves have been monitored from 10 to 40 °C by means of Differential Scanning Calorimetry and fitted using the generalized Boundary Nucleation and Growth Model combined to a diffusion-limited model, to extract: induction times, reaction rates, activation energies and diffusion coefficients. As a main result, this paper contributes to the advancement of the knowledge in the field of the extrusion process of cementitious materials, providing a thermodynamic support to the empirical evaluations of the additives performances.
2013
395
68
74
Francesca Ridi;Emiliano Fratini;Roberta Alfani;Piero Baglioni
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Utilizza questo identificatore per citare o creare un link a questa risorsa: https://hdl.handle.net/2158/817545
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