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Novel Use of Kaolin Wastes in Blended Cements

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This paper describes the influence of different thermally activated clay wastes (ACW) on the hydration phases in cement pastes containing two percentages of addition (10% and 20%). Results show that the main products obtained during hydration of cement pastes containing ACW were portlandite, calcium aluminate hydrates, calcium silicate hydrates, and hydrotalcite-type compounds. Portlandite formation decreases when addition percentage is 20%, contrary to tetracalcium aluminate hydrate, which increases in similar conditions. The ACW that showed the most portlandite consumption was ACW1 (700°C, 2 h) according to thermogravimetric data.
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Document Type: Research Article

Affiliations: 1: Instituto Eduardo Torroja, CSIC, 28033 Madrid, Spain 2: Universidad Autónoma de, 28049 Madrid, Spain

Publication date: October 1, 2009

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