Modelling chloride ingress into cracked and crack-free Strain-Hardening Cement-based Composites (SHCC)

Title: Modelling chloride ingress into cracked and crack-free Strain-Hardening Cement-based Composites (SHCC)
Author(s): F. Altmann, V. Mechtcherine
Paper category : conference
Book title: 3rd International PhD Workshop on Modelling the Durability of Reinforced Concrete
Editor(s): R. M. Ferreira, J. Gulikers, C. Andrade
Print-ISBN: 978-2-35158-095-0
e-ISBN: 978-2-35158-094-3
Publisher: RILEM Publications SARL
Publication year: 2010
Pages: 75 - 83
Total Pages: 9
Nb references: 18
Language: English

Abstract: Strain-Hardening Cement-based Composites (SHCC) are high-performance fibre-reinforced composites characterised by their high ductility under tensile load. This is achieved through the formation of multiple cracks with limited crack width. It is expected that structural SHCC members will typically contain steel reinforcement (R/SHCC), thus steel corrosion due to chloride ingress will often be critical to the durability of such members. Due to the limited crack width cracked SHCC provides greater resistance against the ingress of chloride than cracked ordinary concrete. This is especially true under high tensile strains. To fully utilise this advantageous property of SHCC in the design of durable R/SHCC members and structures, a performance-based durability design concept is required that is applicable to both crack-free and cracked SHCC. In this paper an extension of the DuraCrete approach is presented that uses fuzzy probability theory to quantify model parameters for chloride ingress in cracked and crack-free SHCC. This approach takes into account the limited availability of relevant data for new materials, which prevents a reliable stochastic quantification of model parameters. Model parameter quantification based on experimental investigations is also briefly presented.

Online publication: 2010-02-22
Publication type : full_text
Public price (Euros): 0.00