The correlation between surface activity and retardation effect on cement hydration of non-ionic cellulose ethers

Author(s): Zhihua Ou, Yi Xiao, Hui Cao and Longmin Jiang
Paper category: Proceedings
Book title:4th International Symposium on Design, Performance and Use of Self-Consolidating Concrete
Editor(s): Caijun Shi & Zuhua Zhang, Hunan University, China
Kamal Henri Khayat, Hunan University, China
Missouri University of Science & Technology, USA
ISBN:978-2-35158-204-6
e-ISBN:978-2-35158-205-3
Publisher: RILEM Publications SARL
Publication year:2018
Pages:144-150
Total Pages:7
Language : English

Abstract: Cellulose ethers (CEs) are important thickeners of SCC, which may also lead to retardation of cement hydration. The molecular parameters of CEs, such as molecular weight, type and content of substituent group, play a major role on the retardation of cement hydration. For judging the retardation effect of non-ionic cellulose ethers on cement hydration only by using one parameter, the correlation between surface activity and retardation effect on cement hydration of non-ionic cellulose ethers is investigated. The correlation curve between surface tension of CEs and hydration heat peak value time of cement pastes modified by CEs is drawn, and the approximate correlation between them is found: the higher the surface tension is, the higher the hydration heat peak value time is; for the same type CEs, this correlation is more obviously. The retardation effect of CEs can be approximately estimated by their surface
tension, especially for the same type CEs. A parabolic equation can be fit to describe the correlation between the hydration heat peak value time and the surface tension.

Online publication : 2018
Publication type : full_text
Public price (Euros) : 0.00