Applicability of the Hedvall effect to study the reactivity of calcium silicate hydrates

Author:

Alizadeh R.1,Beaudoin J.J.1,Ramachandran V.S.1,Raki L.1

Affiliation:

1. Institute for Research in Construction, National Research Council, Ottawa, Canada

Abstract

The Hedvall effect was used to investigate the reactivity of calcium silicate hydrates (C–S–H) with variable C/S ratios. The solid state reaction between silver nitrate and various C–S–H preparations occurring during the crystalline transition of silver nitrate was evaluated. Thermal methods as well as microscopic and X-ray diffraction analyses were employed to study the nature of the reaction products and estimate the chemical reactivity of the C–S–H systems. The overall reactivity included cationic and anionic species; namely both calcium and silica entered into the reaction. Silver silicate was identified as one of the reaction products.

Publisher

Thomas Telford Ltd.

Subject

General Materials Science,Building and Construction

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