Abstract
In this paper, the effects of the content of steel fiber and lightweight aggregate types on the mechanical properties of lightweight engineered geopolymer composites (LW-EGC) were investigated by uniaxial compression tests. The effect on compressive strength, stress-strain curves, elasticity modulus, peak strain, and energy absorption were discussed. The results showed that the type of lightweight aggregate had a significant effect on the mechanical properties of LW-EGC. LW-EGC-C had higher compressive strength, elasticity modulus, and energy absorption capacity. LW-EGC-S had a higher peak strain. Adding steel fibers could greatly increase the compressive strength, peak strain, and energy absorption. Meanwhile, there was an optimal range for the volume content of steel fiber, so the best improvement effect was achieved when the content of steel fiber was 1.0 %. Compared with LW-EGC-M, the above mechanical properties were improved by 39.28 %, 15.32 %, and 26.17 %, respectively. In addition, based on the existing constitutive models and test results, a stress-strain model for LW-EGC suitable for incorporating steel fibers is proposed. The constitutive model was divided into a rising phase and a falling phase, which could describe the falling curve more accurately than the existing constitutive models, indicating that it could reliably describe the compressive stress-strain response of LW-EGC.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
