Hydration model for cementitious materials containing mineral admixtures

Authors: T. Saeki, K. Sasaki
Paper category: conference
Book title: Concrete Durability and Service Life Planning – ConcreteLife’09
Editor(s): K. Kovler
Print ISBN: 978-2-35158-074-5
e-ISBN: 978-2-35158-085-1
Publisher: RILEM Publications SARL
Publication year: 2009
Pages: 466 – 473
Total Pages: 8
Language: English

Abstract: C-S-H is the dominant hydration product of cementitious materials. Ca/Si molar ratio of C-S-H depends on types of binder, water to binder ratio and curing period. C-S-H with a low Ca/Si ratio is formed due to hydration of mineral admixtures, such as fly ash and blast furnace slag.
Physical and chemical properties of C-S-H are affected by Ca/Si ratio. Physical and chemical properties of the concrete may be affected by Ca/Si ratio of C-S-H. Therefore, it is important for estimate the properties of the concrete using mineral admixture to predict the Ca/Si ratio of C-S-H.
From the background, the purpose of this study is to estimate the Ca/Si ratio of the C-S-H formed by hydration of mineral admixtures. The reaction between mineral admixture and calcium hydroxide was investigated with mineral admixture – calcium hydroxide paste.
Based on the experimental results, hydration models between mineral admixture and calcium hydroxide are proposed to predict the Ca/Si ratio. Using these models, the prediction method for the Ca/Si of C-S-H formed by the hydration of cement and mineral admixture is developed. The Ca/Si ratios of C-S-H in various cement-mineral admixture pastes can be predicted using the prediction model.

Online publication: 2012-05-16
Publication Type: full_text
Public price (Euros): 0.00