Effect of Periodic Thermal Fatigue on Strength and Permeability of Ultra-High Performance Concrete

Author(s): Zhang G, An M.Z., Dong X.Y., Han M.M., Han S.
Paper category: Proceedings
Book title: 1st International Conference on UHPC Materials and Structures
Editor(s): Caijun Shi and Dehui Wang
ISBN: 978-2-35158-164-3
e-ISBN: 978-2-35158-165-O
Publisher: RILEM Publications SARL
Publication year: 2016
Pages: 395-402
Total Pages: 08
Language: English

Abstract: Suffered from high temperature and high humidity, the bridge pier under marine environment was affected by the intense ultraviolet radiation, the surface temperature was high. At the same time, the concrete bridge piers in the splash zone were subjected to high temperature and also suffer from low temperature of sea water erosion. The influences of temperature and humidity
of alternating thermal fatigue cycle on the performance of the piers concrete cannot be ignored. In this paper, compressive strength as the evaluation index of mechanical properties and electric flux as the evaluation index of permeability properties were evaluated. The mechanical properties and penetration resistance of ultra-high performance concrete (UHPC) with different steel fiber contents (0%, 1%, 2%) under the periodic thermal fatigue were studied. The results showed the compressive strength of UHPC with steel fiber content of 0% and 1% increased first and then decreased, while that with steel fiber content of 2% decreased first and then increased and then decreased. The electric flux of UHPC with steel fiber content of 0%, 1%,
and 2% gradually increased. A reasonable steel fiber content can effectively improve the compressive strength of UHPC under the periodic thermal fatigue cycles, but not conductive to improve the impermeability of UHPC. With the further increase of steel fiber content, the compressive strength showed a decline trend.

Online publication: 2016
Publication type : full_text
Public price (Euros): 0.00