Projects per year
Abstract
This is a first study comparing dielectric spectroscopy and gravimetric measurements of moisture uptake in pultruded glass fibre reinforced polymers (FRPs). Specimens were subjected to sub-Tg hygrothermal aging for 224 days. Impedance spectra in the frequency range 0.1 Hz to 10 MHz were captured during exposure and compared with gravimetric measurements. Moisture concentration was found to increase the FRP’s dielectric permittivity monotonically and decrease bulk resistance. High quality dielectric data was obtained as moisture uptake is independent of inherent changes suggested by mass loss which compromise gravimetry. Dielectric measurements remained sensitive to moisture despite significant mass loss, which typically distorts the weight gain process complicating the commonly adopted gravimetric methodology. Real-time dielectric measurements were obtained from FRP specimens continuously immersed in water and without making use of any additional sensing elements. The novel approach adopted is of high commercial impact as moisture uptake control is recognized as a significant problem by industry.
Original language | English |
---|---|
Pages (from-to) | 108-117 |
Number of pages | 10 |
Journal | Composites Part A - Applied Science and Manufacturing |
Volume | 105 |
Early online date | 21 Nov 2017 |
DOIs | |
Publication status | Published - 28 Feb 2018 |
Keywords
- Dielectric changes
- Glass fibre reinforced polymer
- Impedance spectroscopy
- Moisture uptake
ASJC Scopus subject areas
- Ceramics and Composites
- Mechanics of Materials
Fingerprint
Dive into the research topics of 'Impedance spectroscopy as a tool for moisture uptake monitoring in construction composites during service'. Together they form a unique fingerprint.Projects
- 1 Finished
-
Limesnet Duracomp
Evernden, M. (PI)
Engineering and Physical Sciences Research Council
1/06/13 → 4/08/16
Project: Research council
Profiles
-
Richard Ball
- Department of Architecture & Civil Engineering - Reader
- Centre for Sustainable Chemical Technologies (CSCT)
- Centre for Integrated Materials, Processes & Structures (IMPS)
- Centre for Climate Adaptation & Environment Research (CAER)
- Centre for Regenerative Design & Engineering for a Net Positive World (RENEW)
Person: Research & Teaching, Core staff, Affiliate staff
-
Mark Evernden
- Department of Architecture & Civil Engineering - Senior Lecturer
- Centre for Regenerative Design & Engineering for a Net Positive World (RENEW)
Person: Research & Teaching, Core staff