Concrete structures paper
Ma, X, Mills, JE 2014, 'Structural performance of composite panels filled with light-weight crumb rubber concrete', 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. 669-674. ISBN: 9780994152008.
Crumb Rubber Concrete (CRC) first appeared in the 1990s, where crumbed rubber made from waste tyres was used as a partial aggregate replacement in paving concrete. CRC has better acoustic insulation, higher toughness, better impact resistance and reduced shrinkage and cracking when compared with traditional concrete. However, due to the weak interfacial bonds between the cement paste and tyre rubber, there is a reduction in compressive strength of concrete manufactured with rubber aggregates, which has to date limited the application of CRC in structural engineering. This paper addresses one of the potential structural applications of CRC for wall panel construction. An innovative composite panel with external steel skin filled internally with light-weight CRC has been designed, constructed and tested. Because of the reversible elasticity properties of rubber materials and the significantly increased damping properties, the new composite CRC panel is expected to have potential advantages in structures sensitive to vibration and impact. In this research, the static moment capacity and compression capacity of the CRC composite panel was tested. As a second step in the study, windborne debris impact tests were carried out to calibrate the impact capacity of the CRC panel. The test results verify that the newly developed CRC panel exhibits superior dynamic performance without any significant loss in static load-carrying capacities when compared with traditional lightweight composite panels.