Mechanics behavior of ultra high toughness cementitious composites after freezing and thawing |
| |
Authors: | Shilang Xu and Xinhua Cai |
| |
Affiliation: | (1) College of Civil Engineering and Architecture, Zhejiang University, Hangzhou, People’s Republic of China;(2) Dalian Institute of Building Scientific Research & Design Stock Co., LTD, Dalian, People’s Republic of China;(3) Department of Civil Engineering, Dalian University of Technology, Dalian, People’s Republic of China |
| |
Abstract: | Mechanical behaviors of UHTCC after freezing and thawing were investigated, and compared with those of steel fiber reinforced
concrete (SFRC), air-entrained concrete (AEC) and ordinary concrete (OC). Four point bending tests had been applied after
different freezing-thawing cycles (0, 50, 100, 150, 200 and 300 cycles, respectively). The results showed that residual flexural
strength of UHTCC after 300 freezing-thawing cycles was 10.62 MPa (70% of no freezing thawing ones), while 1.58 MPa (17% of
no freezing thawing ones) for SFRC. Flexural toughness of UHTCC decreased by 17%, while 70% for SFRC comparatively. It has
been demonstrated experimentally that UHTCC without any air-entraining agent could resist freezing-thawing and retain its
high toughness characteristic in cold environment. Consequently, UHTCC could be put into practice for new-built or retrofit
of infrastructures in cold regions. |
| |
Keywords: | |
本文献已被 CNKI SpringerLink 等数据库收录! |
|