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Details of Grant 

EPSRC Reference: GR/R18291/01
Title: Accelerated Ageing & Durability Modelling of Glass Fibre Reinforced Cementitious Composites
Principal Investigator: Purnell, Professor P
Other Investigators:
Researcher Co-Investigators:
Project Partners:
Department: Sch of Engineering
Organisation: University of Warwick
Scheme: Fast Stream
Starts: 01 January 2001 Ends: 31 December 2003 Value (£): 63,021
EPSRC Research Topic Classifications:
Eng. Dynamics & Tribology
EPSRC Industrial Sector Classifications:
Construction Manufacturing
Environment
Related Grants:
Panel History:  
Summary on Grant Application Form
Glass-fibre reinforced cement composites are commonly subjected to accelerated ageing in order that service life predictions can be made. The rationale underpinning current methods is now obsolete. It was developed empirically for use only with unmodified Portland cement-based matrices - modern grc uses modified and non-Portland matrices. A new rationale has been proposed which addresses these concerns. Preliminary results indicate that the old rationale is inappropriate for use with new GRC formulations and overestimate their durability. However, there is insufficient data available concerning the accelerated ageing behaviour of these new formulations to fully apply the new rationale. It is proposed that programmes of accelerated ageing, mechanical testing and microstructural studies are initiated to provide this data. Commercial GRC samples will be aged to varying periods of time at temperatures between 38 and 80(C and the degradation of mechanical properties with time evaluated and related to microstructural changes. The strength vs time data will be factored into a new durability model, the activation energies of the processes underlying the strength loss derived and design guidelines predicting service lives advanced. The findings will also allow the new model to be refined and the assumptions upon which it is based examined.
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Organisation Website: http://www.warwick.ac.uk