Cracking susceptibility due to volume changes of self compacting concrete (SCC)

Title: Cracking susceptibility due to volume changes of self compacting concrete (SCC)
Author(s): T.A. Hammer
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: 553 - 557
Total Pages: 5
Nb references: 5
Language: English

Abstract: The influence of mix design of SCC on the cracking susceptibility due to volume changes has been evaluated. The volume changes considered are plastic settlement and shrinkage, autogenous deformation, thermal dilation and drying shrinkage. SCC is normally more vulnerable to cracking in the plastic stage (before and during time of set) than ordinary compacted concrete (OCC), because of higher cement and/or filler content. If SCC is designed with more binder and/or reduced w/b than compared with the alternative OCC, the risk of "thermal cracking" of the SCC is higher. In fact, it may convert a "no problem" using OCC into a problem using SCC that should be paid special attention (e.g. by crack risk prediction calculations). The risk of drying shrinkage cracking is probably not significantly different from OCC, unless a considerable increase in amount of paste is used. However, extra care should be taken in order to avoid segregation, in slabs in particular.

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