Investigation of the surface charge behaviour of ettringite: Influence of pH, calcium, and sulphate ions.

ABSTRACT: Ettringite is an important mineral that contributes to the overall performance of cementitious materials. Knowledge of the surface charge behaviour of a solid is necessary for a mechanistic description of surface processes such as adsorption or particle-particle interactions. The objective of this study was to develop a model capable of reproducing ettringite surface charge as a function of calcium, sulphate, and pH. Ettringite was synthesised and characterised using different analytical, microscopic, and spectroscopic techniques with the help of density functional theory. Electrophoretic mobility was measured using laser Doppler electrophoresis in alkaline waters representative of the cementitious environment. The behaviour of the ettringite surface charge was shown to be quite complex as

SUBMITTER: Missana T 

PROVIDER: S-EPMC11378879 | biostudies-literature | 2024 Aug

REPOSITORIES: biostudies-literature