Document Type

Composite structures paper

Publication details

Un, CH, Sanjayan, JG, San Nicolas, R, van Deventer, JSJ 2014, 'Investigation of long-term behaviour of composite geopolymer concrete beams under sustained loads', in ST Smith (ed.), 23rd Australasian Conference on the Mechanics of Structures and Materials (ACMSM23), vol. II, Byron Bay, NSW, 9-12 December, Southern Cross University, Lismore, NSW, pp. 657-662. ISBN: 9780994152008.

Peer Reviewed



The long term behaviour of steel composite beams constructed with geopolymer concrete is investigated. A sustained load of 1 kPa was applied on top of the beams at the age of 14 days. Creep tests on geopolymer concrete show higher creep in the specimens loaded at 14 days than those loaded at 28 days. Long term deflection calculations were performed by using the age-adjusted effective modulus method (AEMM) through input of properties of geopolymer concrete from experimental data including elastic modulus, modulus of rupture, creep and shrinkage. The estimated deflection by AEMM as applied to geopolymer concrete beams is compared with the experimental results, and the accuracy is discussed.