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Crack distribution characterisation towards a framework for durability design of SHCC



Title: Crack distribution characterisation towards a framework for durability design of SHCC
Author(s): G.P.A.G. van Zijl
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: 149 - 156
Total Pages: 8
Nb references: 23
Language: English


Abstract: To verify and quantify the durability of strain-hardening cement-based composites (SHCC), the cracked state must be carefully linked with durability performance. Cracks are permitted in reinforced concrete under service conditions, but most research has focussed on the resistance of uncracked concrete to ingress of gases, fluids and salts. Research results on cracking and its influence on gas and water permeation, chloride diffusion, and capillary absorption are reported here. Ingress rates are increased by cracks, which form pathways.
Evidence is presented that water flow rate is proportional to the crack width cubed, but chloride diffusion is proportional to the crack width. A framework for durability design with SHCC is proposed, serving the dual purpose of informing comprehensive consideration of degradation and transfer mechanisms, and highlighting research needs.


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