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Role of cracks in delayed ettringite formation



Title: Role of cracks in delayed ettringite formation
Author(s): K. Scrivener, A. Guidoum, V. Mathier
Paper category : conference
Book title: International RILEM Workshop on Internal Sulfate Attack and Delayed Ettringite Formation
Editor(s): K. Scrivener and J. Skalny
Print-ISBN: 2-912143-44-6
e-ISBN: 2912143802
Publisher: RILEM Publications SARL
Publication year: 2004
Pages: 259 - 262
Total Pages: 4
Nb references: 7
Language: English


Abstract: The role of cracks in expansion due to delayed ettringite formation is controversial. Some researchers claim that expansion occurs throughout the paste and that cracks form as a consequence of the stresses created in the concrete due to the heterogeneous arrangement of the aggregates and that ettringite subsequently recystallises into these cracks. Others claim that the growth of ettringite in cracks, causing them to widen and extend, is the principal mechanism of expansion. This paper reviews some aspects of this question and presents some preliminary results of numerical simulation, illustrating how uniform expansion in the paste phase may lead to a complex crack pattern due to the propagation of existing cracks.


Online publication: 2002-09-07
Publication type : full_text
Public price (Euros): 0.00
doi: 10.1617/2912143802.018