ORCID

Document Type

Article

Abstract

Fire is one of the most severe conditions encountered during the lifetime of a structure. Consequently, the provision of proper fire safety measures for structural members is a major safety requirement in building design. In this paper an experimental study is reported on the axial deformation of GGBS-FA-SF blended geopolymer mortar and geopolymer concrete with and without steel fibre when they are subjected to both mechanical and thermal loadings. The transient tests were conducted in Instron machine with additional heating facility. During the test the specimen was first subjected to a pre-defined mechanical load and followed by thermal heating. The transient axial deformations of the tested specimens were recorded using digital image correlation camera. By using the experimentally obtained temperature-dependent thermal strains of the specimen with different preloads the transient strains of the geopolymer mortar and geopolymer concrete with and without steel fibre are analysed and evaluated. Finally, empirical formulas are also proposed to reproduce the influence of the preload, heating temperature and constituents of the mix on the transient strain of geopolymer mortar and geopolymer concrete.

Publication Date

2024-03-15

Publication Title

Construction and Building Materials

Volume

419

ISSN

0950-0618

Acceptance Date

2024-02-22

Deposit Date

2024-08-22

Funding

The authors would like to acknowledge the financial support received from the National Natural Science Foundation of China under grants (No. 52078300 and No. 51978406), the Marie Skłodowska-Curie Individual Fellowships (H2020-MSCA-IF-2020) under grant No. 101022142 (TemGPC), and the Royal Society Joint Project with NSFC China under grant No. IEC\NSFC\201077.

Keywords

Alkali activated binder, Concrete, Elevated temperature, Fire, Geopolymer, Transient strain

Creative Commons License

Creative Commons Attribution 4.0 International License
This work is licensed under a Creative Commons Attribution 4.0 International License.

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