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Fracture toughness and fracture energy of concrete subjected to freeze-thaw cycles



Title: Fracture toughness and fracture energy of concrete subjected to freeze-thaw cycles
Author(s): Z. Ning, H. Ba, Y. Yang
Paper category : conference
Book title: International Conference on Microstructure Related Durability of Cementitious Composites
Editor(s): W. Sun, K. van Breugel, C. Miao, G. Ye and H. Chen
Print-ISBN: 978-2-35158-065-3
e-ISBN: 978-2-35158-084-4
Publisher: RILEM Publications
Publication year: 2008
Pages: 815 - 823
Total Pages: 9
Nb references: 10
Language: English


Abstract: According to GBJ82-85 test method for frost resistance of concrete, four-point bending tests were used to examine the effects of water-cement ratio and air-entraining agent on fracture toughness, fracture energy and dynamic elastic modulus of concrete subjected to 300 rapid freeze-thaw cycles. The microstructure of the concrete was also analyzed. The results show that with the increase of the number of freeze-thaw cycles, the fracture toughness of concrete, and the loss of fracture energy as well as the loss of relative dynamic elastic modulus showed a downward trend. The higher water-cement ratio, the severer the damage of concrete as the number of freeze-thaw cycles increased. Air-entraining agent can significantly reduce the damage of concrete structure due to freeze-thaw cycles. The loss of fracture energy and the loss of relative dynamic elastic modulus kept a good linear relationship.


Online publication: 2009-06-09
Publication type : full_text
Public price (Euros): 0.00