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- Title
INSIGHTS ON THE MECHANISMS OF SEAWATER-MIXING CALCIUM SILICATE SLAG-BASED ALKALI-ACTIVATED MATERIALS.
- Authors
DI SHI; JIAYUAN YE; WENSHENG ZHANG; WEIGUO SHEN
- Abstract
In order to get a full understanding of the mechanisms of seawater-mixing alkali-activated materials, calcium silicate slag (CSS)-based alkali-activated materials (AAMs) with various content of Cl- were synthesized, and then the effect of Cl- on the properties, products, hydration heat evolution, microstructure of AAMs, as well as the characteristics of alkaline solution were investigated. The results showed that the Cl- introduced in the form of solid NaCl significantly decreased the mechanical properties of CSS-based AAMs in the range higher than 1 wt%. This properties degradation can be attributed to the hydration inhibitions caused by the dissolution of solid NaCl and the interaction between NaCl and sodium silicate solution, as well as the formation of non-cementitious sodalite other than C(N)-A-S-H gels. Despite this, the findings of this study provided further evidence for the application potentialities of seawater in AAMs as mixing water due to the limited content of Cl- in seawater.
- Subjects
CALCIUM silicates; HEAT of hydration; SOLUBLE glass; ALKALINE solutions; SODALITE; SEAWATER
- Publication
Romanian Journal of Materials / Revista Romana de Materiale, 2023, Vol 53, Issue 1, p43
- ISSN
1583-3186
- Publication type
Article