The self-healing of ultra-high performance cement based composites

Author(s): Jianzhong Lai, Chunmei Yang, Wei Sun
Paper category: Conference
Book title: 2nd International conference on Microstructural-related Durability of Cementitious Composites
Editor(s): Guang Ye, K. Van Breugel, Wei Sun, Changwen Miao
Print ISBN: 978-2-35158-129-2
e-ISBN: 978-2-35158-123-0
Publisher: RILEM Publications SARL
Pages: 1616- 1625
Total Pages: 9
Language: English

The self-healing of ultra-high performance cement based composites (UHPCC) was researched. Multi-scale fibers and different reactive powders were used to improve the self-healing of UHPCC. The static mechanical properties and ultrasonic wave velocity of UHPCC were measured before and after loading. The damaged UHPCC specimens subjected to different static loads were re-cured in different conditions. The mechanical behaviour and ultrasonic wave velocity of re-cured specimens were compared with those of intact specimens. Results show obvious self-healing of UHPCC and the self-healing is improved with increasing of curing time and temperature. Longer fiber reinforced UHPCC shows better self-healing than short fiber reinforced one. The damaged specimens with binary or ternary reactive powders recover more than those with single powders.

Online publication: 2013
Publication Type: full_text
Public price (Euros): 0.00