Effect of limestone filler on the cement hydration in self-compacting concrete

Title: Effect of limestone filler on the cement hydration in self-compacting concrete
Author(s): A.M. Poppe, G. De Schutter
Paper category : conference
Book title: International RILEM Symposium on Self-Compacting Concrete
Editor(s): O. Wallevik and I. Nielsson
Print-ISBN: 2-912143-42-X
e-ISBN: 2912143713
Publisher: RILEM Publications SARL
Publication year: 2003
Pages: 558 - 566
Total Pages: 9
Nb references: 12
Language: English

Abstract: At the Magnel Laboratory for Concrete Research an extensive experimental program is going on concerning SCC. One of the objects of this study is to investigate the development of heat energy caused by the hydration reaction. The high concentrations of cement and fillers (often with puzzolanic properties) can lead to the development of an increased heat of hydration, with rather large thermal stresses in the hardening concrete and early age thermal cracking as a consequence. In literature it is often mentioned to use alternative, non-puzzolanic fillers, but few figures concerning heat generation are submitted. In the experimental program adiabatic hydration tests are carried out to evaluate the heat generation in SCC with a high limestone filler content. Combining these results with the results of isothermal hydration tests on the paste fraction of the SCC, it can be concluded that the changes made in the mixture composition to make the concrete self-compactable, also alter the reaction mechanism. To investigate the cause(s) of this alterations, tests on different mix compositions are carried out, also considering different types of cement.To study the heat generation in more detail, the applicability of a hydration model developed for traditional concrete is investigated, and suggestions are made to incorporate the effect of the high limestone filler content.

Online publication: 2003-08-21
Publication type : abstract_only
Public price (Euros): 0.00