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- Title
Rate-Dependent Bonding of Steel Reinforcement in Geopolymer Concrete.
- Authors
Dongming Yan; Shikun Chen; Chenglin Wu; Qiang Zeng; Fan Yang
- Abstract
In this work, the dynamic pullout experiments with loading rates ranging from 0.1 to 100 MPa/s (0.0145 to 14.5 ksi/s) were conducted to investigate the bond behavior between the metakaolin-based geopolymer (MKG) concrete and the plain and deformed steel reinforcement. A rate-dependent bonding behavior between the MKG concrete and the steel reinforcement was observed. Using an analytical model, the effects of the dynamic properties of MKG concrete and the interfacial properties at MKG-steel interface were quantitatively characterized. The morphologies of the bonded and failed interfaces were also examined and analyzed, showing different failure mechanisms associated with varying loading rates. These results link the loading rate-dependency of the MKG-steel bonding behavior to the enhanced chemical adhesion at the MKG-steel interface.
- Subjects
REINFORCING bars; CONCRETE; INTERFACIAL bonding
- Publication
ACI Materials Journal, 2019, Vol 116, Issue 5, p217
- ISSN
0889-325X
- Publication type
Article
- DOI
10.14359/51715586