Geopolymer concrete-filled aluminium alloy tubular cross-sections

Composite steel–concrete members are adopted in structural applications as a cost-effective and high-speed construction practice. Exploiting the superior corrosion strength-to-weight properties of aluminium, research on composite aluminium-concrete has been reported. Aiming for an even more sustainable durable member, this paper proposes combining aluminium alloys with low carbon geopolymer concrete (GC) to form member lower environmental footprint. To end, experimental programme concrete-filled alloy tubular (GCFAT) cross-sections is performed. A total 24 tests stub columns 12 beams were carried out. In particular, 4 square hollow sections infilled one-part tested under uniform compression uniaxial bending. The fabricated from 6082-T6 heat-treated alloy. same also bare ordinary Portland cement (OPC) comparison purposes. It shown that strength significantly increased compared ones. average increase was range 16.5%–93.3% 23%–93.1% GC OPC-aluminium columns, respectively. beams, 14.1%–53.6% GC-aluminium 10.2%–48.9% specimens. absence codified design rules concrete-aluminium structures, formulae based European standards members, material steel replaced by those GC, respectively, adopted. obtained results demonstrated proposed methodology suitable GCFAT providing reasonably accurate consistent predictions. Overall, potential novel cement-free, sustainable, structurally efficient cross-section demonstrated.