expansion of cement

Dear All

what is the diffrence between autoclave & Lechatelier expansion?

what are the reasons of Autoclave expansion & ramedy?

what are the reasons of Lechalier expansion & solutions?

Can both occur simulateniously? if yes why?

Pl. reply

engineer

 

 

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re expansion of cement

This paper should answer most of your questions;-

http://www.cement.org/bookstore/download.asp?mediatypeid=1&id=6439&itemid=SN2651

 

Regards,

Ted.

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re expansion of cement

The Le Chatelier procedure determines unsoundness from the hydration of free CaO only, whereas the autoclave procedure measures cement paste expansion from either free CaO, free MgO, or both. However, it should be noted that a high C3A and low C4AF content in cement, in addition to the known additive effects of CaO and MgO, may also contribute to the total autoclave expansion.

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