• (development of low ph cement systems forming magnesium silicate hydrate (m-s-h

    جزئیات بیشتر مقاله
    • تاریخ ارائه: 1392/07/24
    • تاریخ انتشار در تی پی بین: 1392/07/24
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     this work aimed to develop novel cement systems for waste encapsulation that would form with a ph of around 10. the approach taken was to investigate the formation of brucite by hydration of a light burned periclase (mgo). commercially available mgo powders often contain some cao, and therefore silica fume was added to form c-s-h gel. identification of the hydrated phases in mgo/silica fume samples showed that brucite formed in substantial quantities as expected. however, brucite reacted with the silica fume to produce a magnesium silicate hydrate (m-s-h) gel phase. after 28 days, the ph of systems rich in mgo tended towards the ph controlled by residual brucite (~ 10.5), whereas when all brucite reacts with silica fume a cement with an equilibrium ph just below 10 was achieved.

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