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Hydration products of slag in blended cement
Many XRD analysis results have shown the main hydration products of slag blended cement are essentially similar with that of pure Portland cement, except the amounts of CH found by this method or other are in varying degrees and less than those that should be given by the pure Portland cement constituent if the slag part did not participate the reaction. The main hydration products of the slag-cement are C-S-H gel, Ca(OH)₂, the sulpho-aluminate hydrate phases AFt and AFm and a Mg, Al-rich hydroxide phase. ...
Activation of slag in blended cement
The latent hydraulic property of slag means no hydration products could be observed when slag is solely placed in contact with water, though surface analysis using X-ray photoelectron spectrometry showed that the surface of slag was modified as soon as it came into contact with water making a protective film lacking Ca²⁺ that prevent further reaction, thus, slag dissolves to a small extent. The hydration of slag and cement is more complex than that of Portland cement; given that both slag and cement take part in the reaction with water. ...