University of Manchester

Characterisation of fire-spalling-resistant concrete and mortar

Shanshan Cheng

Scientific Case

Fire-induced spalling of concrete experienced by constructed facilities such as tunnels, buildings and bridges has been shown to cause catastrophic failure, and to lead to huge economic costs and potential loss of life. However, despite the consequences, fire-induced spalling remains one of the least well understood aspects of concrete behaviour. This project aims to develop an improved understanding of fire-induced spalling of modern high-performance concrete, and to find a sustainable spalling-mitigation solution by using fibres recovered from end-of-life tyres. X-Ray Computed Tomography (XRCT) will be used to detect the microstructural changes in concrete due to thermo-mechanical loading and to examine the underlying mechanics of spalling and the spalling-mitigation mechanism of polymer fibre in general and that of the Reused Tyre Polymer Fibre (RTPF) in particular.

Experiment Design

The smallest feature of interest is in the order of 5-15 microns (polymer fibres), and the re-solidified polymeric mass (of a few microns).
Scanners and Rigs
Nikon Custom 320kV Bay
Not Required
Xradia VersaXCT
Not Required
Xradia VersaXCT
MRI furnace is required

Sample & Safety

Three cylindrical concrete cores, with diameters of 10 - 50 mm;
One cylindrical mortar sample, with a diameter of 10 mm.
Low Hazard

Scan Records

Project Report