Universal modeling for hydration heat generation and strength development of arbitrarily blended cementitious materials based on multicomponent system

Title: Universal modeling for hydration heat generation and strength development of arbitrarily blended cementitious materials based on multicomponent system
Author(s): T. Kishi, Y. Otabe, Z. Lin
Paper category : conference
Book title: International RILEM Symposium on Concrete Modelling - ConMod '08
Editor(s): E. Schlangen and G. De Schutter
Print-ISBN: 978-2-35158-060-8
e-ISBN: 978-2-35158-076-9
Publisher: RILEM Publications SARL
Publication year: 2008
Pages: 411 - 418
Total Pages: 8
Nb references: 6
Language: English

Abstract: A multi-component hydration heat model covering blending cement with blast furnace slag and fly ash was developed and applied more than a decade ago. In this paper some recent improvements for its applicability and accuracy are introduced. First, the physical filler effect of belite to alite reaction and the effect of calcium ion concentration are taken into account so that a wider applicability for various types of Portland cement could be achieved. Second, to enhance the rationality and accuracy for blending cases, the physical filler effect of fly ash was modified, and the reaction balance in terms of consumption of calcium hydroxide as the stimulus between blast furnace slag and fly ash was successfully captured. In addition, new component of silica fume was added to extend applicability to the high strength concrete. The improved model was systematically verified by the experimental results of adiabatic temperature rise, and could be a core technology reliable enough to offer hydration degree of binders for other models. Moreover, a compressive strength development model, in which volume change of solid phase is monitored as the indicator by the improved hydration heat model, is also proposed.

Online publication: 2009-06-15
Publication type : full_text
Public price (Euros): 0.00