Free Lime

What is the effect of water if present in glasswares in free lime determination?

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Re: Free Lime

norew:

What is the effect of water if present in glasswares in free lime determination?

Norew,

Water reacts with clinker minerals such as C3S and C2S to produce calcium silicate hydrates (CSH) and Ca(OH)2.

Ca(OH)2 will react just like CaO with the HCl used in the free lime titration. Therefore, if water is present in either the glassware or the ethylene glycol/ethanol solvent used to dissolve out the free lime, you will no doubt get a falsely high result.

Regards,

Ted.

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