The hydration characteristics of MSWI fly ash slag present in C3S

The hydration characteristics of C3S and the mixing of C3S with municipal solid waste incinerator (MSWI) fly ash slag are reported. The results can be summarised as follows: TGA observations show lower amounts of CSH and Ca(OH)2 in samples that incorporated MSWI slag into C3S, possibly due to the pa...

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Bibliographic Details
Published in:Cement and concrete research 2003-07, Vol.33 (7), p.957-964
Main Authors: LIN, K. L, WANG, K. S, LEE, T. Y, TZENG, B. Y
Format: Article
Language:English
Subjects:
Analysis of cement phases and constituents
Applied sciences
Buildings. Public works
Cement concrete constituents
Cements
Exact sciences and technology
Hydration
Materials
Properties of anhydrous and hydrated cement, test methods
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Summary:The hydration characteristics of C3S and the mixing of C3S with municipal solid waste incinerator (MSWI) fly ash slag are reported. The results can be summarised as follows: TGA observations show lower amounts of CSH and Ca(OH)2 in samples that incorporated MSWI slag into C3S, possibly due to the partial replacement of the C3S by slag with less activity. In general, the incorporation of slag into C3S decreases the initial hydration reactions, but it increases the pozzolanic reactions at a later stage by consuming Ca(OH)2. As hydration proceeds, the C3S peaks decrease, up to 90 days, due to activation of the slag by liberated Ca(OH)2. As well, the amount of hydration products (Ca(OH)2) from the pure C3S pastes are more than for the C3S-slag pastes. Moreover, the degree of hydration of the C3S pastes increases with curing time, and the C3S-slag paste also shows lower degrees of hydration at all ages. 12 refs.
ISSN:0008-8846
1873-3948
DOI:10.1016/S0008-8846(02)01002-5