High Tech Concrete: Where Technology and Engineering Meet pp 1420-1427 | Cite as
Fire Resistance of Concretes with Blended Cements
Abstract
An extensive experimental study has been carried out to analyse the post-heating characteristics of concrete subjected to high temperatures up to 800 °C. Major parameters of our study were the type and amount of supplementary cementitious materials (slag, fly ash, trass, silica fume, metakaolin) in cements and the level of maximum temperature (50, 150, 300, 500 or 800 °C). Present study includes analyses of surface cracking and residual compressive strength.
Our observations indicated that the most intensive surface cracking was observed by using Portland cement without addition of supplementary materials. The increasing contents of the supplementary material of cement influence differently the relative post-heating compressive strength. Tendencies of surface cracking and reduction of compressive strength were in agreement, i.e. the more surface cracks, the more strength reduction has been observed.
Keywords
Fire Fire resistance Concrete Supplementary materials ThermoanalysisNotes
Acknowledgements
Authors acknowledge the support by the Hungarian Research Grant NVKP_16-1-0019 “Development of concrete products with improved resistance to chemical corrosion, fire or freeze-thaw”.
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