Control of cracking direction of Shcc under principal stress rotation with coarse aggregate

Title: Control of cracking direction of Shcc under principal stress rotation with coarse aggregate
Author(s): K. Nagai, B. Suryanto, K. Maekawa and T. Kanda
Paper category : conference
Book title: 2nd International RILEM Conference on Strain Hardening Cementitious Composites (SHCC2-Rio)
Editor(s): R.D. Toledo Filho, F.A. Silva, E.A.B. Koenders and E.M.R. Fairbairn
ISBN: 978-2-35158-120-9
e-ISBN: 978-2-35158-121-6
Publisher: RILEM Publications SARL
Publication year: 2011
Pages: 251 - 258
Total Pages: 8
Nb references: 4
Language: English

Abstract: To optimize the strain-hardening characteristic of SHCC, multiple cracks are expected to form subsequently and orthogonal to any given principal stress direction. However, this condition may not prevail when there is limited stress transfer along the existing multiple cracks, for instance, due to limited shear transfer. This paper provides a first attempt to improve the shear transfer property of SHCC by adding coarse aggregate. Specifically, this paper describes the effects of various aggregate amounts on the strength and ductility of plates made of SHCC with and without coarse aggregate and focuses on the plate cracking behaviour under rotating principal stress axis. It was found that a proper amount of aggregate works robustly with pre-cracking. The improvement in shear was found to stabilize the post-cracking response and to control the orientation of secondary cracks from somewhat orthogonal to the pre-cracks to nearly orthogonal to the new principal stress direction.

Online publication: 2012-01-25
Publication type : full_text
Public price (Euros): 0.00