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Title: Acoustic emission for characterising the crack propagation in strain-hardening cement-based composites (SHCC)

This paper presents the analysis of crack propagation in strain-hardening cement-based composite (SHCC) under tensile and flexural load by using acoustic emission (AE). AE is a non-destructive technique to monitor the development of structural damage due to external forces. The main objective of this research was to characterise the cracking behaviour in SHCC in direct tensile and flexural tests by using AE. A better understanding of the development of microcracks in SHCC will lead to a better understanding of pseudo strain-hardening behaviour of SHCC and its general performance. ARAMIS optical deformation analysis was also used in direct tensile tests to observe crack propagation in SHCC materials. For the direct tensile tests, SHCC specimens were prepared with polyvinyl alcohol (PVA) fibre with three different volume percentages (1%, 1.85% and 2.5%). For the flexural test beam specimens, only a fibre dosage of 1.85% was applied. It was found that the application of AE in SHCC can be a good option to analyse the crack growth in the specimens under increasing load, the location of the cracks and most importantly the identification of matrix cracking and fibre rupture or slippage.
Authors:
 [1] ;  [2] ;  [1] ;  [2]
  1. Department of Civil Engineering, Stellenbosch University (South Africa)
  2. BAM Federal Institute for Materials Research and Testing (Germany)
Publication Date:
OSTI Identifier:
22475492
Resource Type:
Journal Article
Resource Relation:
Journal Name: Cement and Concrete Research; Journal Volume: 69; Other Information: Copyright (c) 2014 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; CEMENTS; COMPOSITE MATERIALS; CRACK PROPAGATION; CRACKS; DEFORMATION; EMISSION; FIBERS; MATRIX MATERIALS; PVA; RUPTURES; STRAIN HARDENING; TENSILE PROPERTIES