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Effect of the “Pozzolit” active mineral admixture on the properties of cement mortars and concretes Part 2: Pozzolanic activity

✍ Scribed by Vili Lilkov; Vanyo Stoitchkov

Publisher: Elsevier Science
Year: 1996
Tongue: English
Weight: 594 KB
Volume: 26
Category: Article
ISSN: 0008-8846
DOI: 10.1016/0008-8846(96)00082-8

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✦ Synopsis

The results from investigations on the pozzolanic activity of the Pozzolit mineral admixture and its components -silica fume and low calcium content fly ash, are regarded in the present paper. The pozzolanic activity of these materials in hydrating cement pastes in the course of one year has been determined by means of physical, chemical and structural methods. It has been established that the Pozzolit mineral admixture has a high pozzolanic activity, comparable to that of silica fume, which is displayed at all ages of cement hydration and exerts a favourable effect on cement strength characteristics. The pozzolanic properties of the admixture are determined mainly by the silica fume during the early stages of hydration and by the fly ash ingredient -at later stages of hydration.

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