Embedded fiber optic micro strain sensors for assessment of shrinkage at very early ages

Title: Embedded fiber optic micro strain sensors for assessment of shrinkage at very early ages
Author(s): S. Schuler, W. Habel, B. Hillemeier
Paper category : conference
Book title: International Conference on Microstructure Related Durability of Cementitious Composites
Editor(s): W. Sun, K. van Breugel, C. Miao, G. Ye and H. Chen
Print-ISBN: 978-2-35158-065-3
e-ISBN: 978-2-35158-084-4
Publisher: RILEM Publications
Publication year: 2008
Pages: 1377 - 1387
Total Pages: 11
Nb references: 13
Language: English

Abstract: Durability is a main concern of high-performance concrete. Particularly microcracks can diminish strength and durability. The majority of the microcracks occur due to restrained shrinkage and temperature deformations at early ages. Embedded fibre optic micro strain sensors are able to measure even slightest deformations of the microstructure. Two types of sensors are used to assess material deformation: stiff fibre Bragg grating (FBG) sensors and compliant fibre optic Fabry-Perot (EFPI) sensors. Measurements of deformations at early ages by using compliant fibre optic sensors with low resistance reaction as well as the assessment of restraining effects of reinforcement steel offered new insights into cementitious matrices.
Important aspects with regard to the durability of embedded glass fibre sensors and to the uncertainty of the measurement results are addressed; results are presented. The deformation measurement results were validated by using computed X-ray tomography.

Online publication: 2009-06-09
Publication type : full_text
Public price (Euros): 0.00