Alkaline stability of cellulose ethers and impact of their degradation products on cement hydration - Mines Saint-Étienne Access content directly
Journal Articles Cement and Concrete Research Year : 2006

Alkaline stability of cellulose ethers and impact of their degradation products on cement hydration

Abstract

Cellulose ethers are polymers frequently introduced into mortar formulations. This study allows to assess the potential role of cellulose ethers degradation on the alteration of the cement hydration kinetics. A retardation mechanism based on the calcium binding capacity of chelates is often proposed to describe the effects of some polysaccharides (e.g. sugars) on cement hydration. The alkaline stability of cellulose ethers has been poorly studied and may represent one way to understand the hydration delay induced by such admixtures. Identification and quantification of the hydroxy carboxylic acids generated during alkaline degradation were performed. The results indicate that cellulose ethers are very stable in alkaline media. We also show that the ability of cellulose ethers to complex calcium ions is negligible. Finally, degradation of cellulose ethers and its impact on the cement hydration kinetics does not seem to be significant.
Fichier principal
Vignette du fichier
JP-CCR-36-7-original.pdf (107.99 Ko) Télécharger le fichier
Origin Files produced by the author(s)
Loading...

Dates and versions

emse-00449712 , version 1 (18-09-2010)

Identifiers

Cite

Jérémie Pourchez, Alexandre Govin, Philippe Grosseau, René Guyonnet, Bernard Guilhot, et al.. Alkaline stability of cellulose ethers and impact of their degradation products on cement hydration. Cement and Concrete Research, 2006, 36 (7), pp.1252-1256. ⟨10.1016/j.cemconres.2006.03.028⟩. ⟨emse-00449712⟩
204 View
1021 Download

Altmetric

Share

Gmail Mastodon Facebook X LinkedIn More