Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Experimental investigation of transient strains of GGBS-FA-SF blended geopolymer concrete at elevated temperatures
https://orcid.org/0000-0002-5982-0965
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.
Highlights Experimental results are reported for thermal strains of free expansion of geopolymer concrete. Experimental results are reported for thermal strains of prestressed geopolymer concrete. Experimental results of transient strains of geopolymer concrete are reported. Temperature- and prestress-dependent transient strain formulas are proposed. The effect of coarse aggregate and steel fibre on transient strains is examined.
Experimental investigation of transient strains of GGBS-FA-SF blended geopolymer concrete at elevated temperatures
https://orcid.org/0000-0002-5982-0965
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.
Highlights Experimental results are reported for thermal strains of free expansion of geopolymer concrete. Experimental results are reported for thermal strains of prestressed geopolymer concrete. Experimental results of transient strains of geopolymer concrete are reported. Temperature- and prestress-dependent transient strain formulas are proposed. The effect of coarse aggregate and steel fibre on transient strains is examined.
Experimental investigation of transient strains of GGBS-FA-SF blended geopolymer concrete at elevated temperatures
https://orcid.org/0000-0002-5982-0965
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.
Highlights Experimental results are reported for thermal strains of free expansion of geopolymer concrete. Experimental results are reported for thermal strains of prestressed geopolymer concrete. Experimental results of transient strains of geopolymer concrete are reported. Temperature- and prestress-dependent transient strain formulas are proposed. The effect of coarse aggregate and steel fibre on transient strains is examined.
Experimental investigation of transient strains of GGBS-FA-SF blended geopolymer concrete at elevated temperatures
Yu, Min (Autor:in) / Wang, Tan (Autor:in) / Lin, Hanjie (Autor:in) / Li, Dawang (Autor:in) / Li, Long-yuan (Autor:in)
22.02.2024
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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