Influence of polycarboxylate superplasticizer, citric acid and their combination on the hydration and workability of calcium sulfoaluminate cement - Mines Saint-Étienne Access content directly
Journal Articles Cement and Concrete Research Year : 2021

Influence of polycarboxylate superplasticizer, citric acid and their combination on the hydration and workability of calcium sulfoaluminate cement

Abstract

PCEs are well known to improve the initial fluidity of CSA. However, their dispersion efficiency drops quickly over time. This issue can be solved by incorporating retarders. In this context, this paper deals with the influence of citric acid, used as a retarder, PCE and their combination on the hydration and workability of CSA. Isothermal calorimetry, XRD and TG analysis were used to describe the hydration process, while workability was characterized with the mini-cone test. Adsorption behavior was investigated using total organic carbon analyzer coupled with ion chromatography. Results show that the introduction of citric acid retained the dispersion efficiency of PCE over time. However, the initial dispersion efficiency of PCE was decreased by citric acid as the latter tend to adsorb first on the surface of cement grains, inhibiting the adsorption of PCE. A dispersion model was proposed to describe the acting mechanism of these admixtures on CSA.
Fichier principal
Vignette du fichier
RB_AG Cement and Concrete Research 2021.pdf (2.01 Mo) Télécharger le fichier
Origin : Files produced by the author(s)

Dates and versions

emse-03267038 , version 1 (24-06-2021)

Identifiers

Cite

Rachid Belhadi, Alexandre Govin, Philippe Grosseau. Influence of polycarboxylate superplasticizer, citric acid and their combination on the hydration and workability of calcium sulfoaluminate cement. Cement and Concrete Research, 2021, 147, pp.106513. ⟨10.1016/j.cemconres.2021.106513⟩. ⟨emse-03267038⟩
103 View
301 Download

Altmetric

Share

Gmail Facebook X LinkedIn More