3D concrete printing technology is an emerging construction method at present and the applications include either panel-based or full building construction. Although, 3D concrete printing is currently being subjected to many research studies, the investigation on fire performance is limited. Fire safety of a building is becoming a prominent consideration due to the recent fire accidents and the consequences in terms of loss of life and property damage. ISO 834 standard fire test regulation and simulation cannot be applied to assess the fire performance of 3D Printed Concrete (3DPC) walls as the real fire time-temperature curves could be more severe, compared to standard fire curve, in terms of the maximum temperature and the time to reach that maximum temperature. Therefore, this article describes an investigation on the fire performance of 3DPC composite wall panels subjected to different fire scenarios. The fire performance of 3DPC wall was traced through developing an appropriate heat transfer numerical model. The validity of the developed numerical model was confirmed by comparing the time-temperature profiles with available fire test results of 3DPC walls. A detailed parametric study of 140 numerical models were conducted subsequently covering different 3DPC wall configurations. Solid, cavity, and cavity insulated walls with 5 varying densities were investigated under 4 fire curves (i.e. standard, hydrocarbon fire, rapid and prolong). 3DPC walls and Rockwool infilled cavity walls showed superior fire performance. Furthermore, the study indicates that the thermal responses of 3DPC walls exposed to rapid fire is crucial compared to other fire scenarios.
|Journal||Journal of Structural Fire Engineering|
|Publication status||Accepted/In press - 19 Feb 2021|