Residual fracture energy of high performance and normal concrete subject to high temperatures英文电子书.pdf

Materials and Structures / Matrriaux et Constructions, Vol. 36, October 2003, pp 515-521 Residual fracture energy of high-performance and normal concrete subject to high temperatures C.V. Nielsen ~ and N. Birani6 2 (1) Danish Technological Institute, Concrete Centre, Yaastrup, Denmark (2) University of Glasgow, Department of Civil Engineering, Glasgow, U.K. A B S T R A C T RESUM Test data on the residual fracture energy of two Des donns sur ldnergie riduelle de rupture de deux significantly different concrete types are presented. About b~tons diffdrents sont prrsent~es. Environ 80 poutres de 80 beams of high performance basalt concrete and ordinary b~ton ~ base de basalte de tr haute performance et de gravel concrete have been tested in accordance with the bdton h base de gravier ordinaire ont ~t~ examinOes RILEM work of fracture method. The bemns are heated at conformdment au travaux de Ia RILEM sur lOnergie de 1~ per minute up to a certain maximum temperature and rupture. Les poutres sont chauffs it 1~ par minutejusqug* kept at this temperature tbr 8 hours before cooling them une tempature maximale, puis maintenues h cette back to room temperature and testing in three-point tempature pendant 8 heures avant dOtre refkoidies de bending. nouveau la tempature ambiante. Les poutres sont ensuite The tests show that the two concretes behave almost tests enflexion (systne defexion en troispoints). identical when the fracture energy GF is considered as a Les essais prouvent q