Effects of Fine-Grained Inert Mineral Additives on Fresh and Hardening Concrete

Title: Effects of Fine-Grained Inert Mineral Additives on Fresh and Hardening Concrete
Author(s): H.-W. Krauss, H. Budelmann
Paper category : conference
Book title: International RILEM Conference on Material Science
Editor(s): W. Brameshuber
Print-ISBN: 978-2-35158-110-0
e-ISBN: 978-2-35158-111-7
Publisher: RILEM Publications SARL
Publication year: 2010
Pages: 357 - 365
Total Pages: 9
Nb references: 17
Language: English

Abstract: An useful strategy of enhancing the rheology and the early age hydration of cementitious materials is given by the addition of fine-grained inert fillers. On the way to a better understood mix design, besides rheological characteristics the influence on hydration kinetics and of the microstructure have to be analysed. In this article, investigations on the influence of inert fillers on hydration process are presented. It is shown, that the parameters for the calculation of nonevaporable water wn and of gel water wg, which are empirically derived from a large OPC database by other authors, have to be modified when small amounts of fine-grained fillers are used. At least, the simple calculation of the effective w/c ratio only having regard to the dilution effect needs revision. Further, objections between the calculation of degree of hydration from calorimetric data and from the nonevaporable water are discussed.

Online publication: 2010-12-02
Publication type : full_text
Public price (Euros): 0.00