Deterioration of Concrete under Combined Freeze-Thaw Cycles, Chloride Attack and Flexural Load

Author(s): Yin CAO, Ling WANG and Yan YAO
Paper category: Proceedings
Book title: Proceedings of the 71st RILEM Annual Week & ICACMS 2017,Chennai,India, 3rd -8th September 2017
Editor(s): Manu Santhanam
Ravindra Gettu
Radhakrishna G. Pillai
Sunitha K. Nayar
ISBN: 978-2-35158-196-4
ISBN: 978-2-35158-190-2 (Set)
e-ISBN: 978-2-35158-191-9:
Publisher: Published by RILEM Publications S.A.R.L.
Publication year: 2017
Pages: 294-303
Total Pages: 10
Language : English

Abstract: Deterioration of concrete under combined freeze-thaw cycles, chloride attack and flexural load
was characterized by using strain and residual strain. The mutual effect of freeze-thaw damage
and chloride attack, as well as the effect of external flexural load on frost damage was analysed.
It is shown that the generation and propagation of micro-cracks caused by frost action degrades
the pore structure of concrete, which accordingly accelerates chloride attack. Due to the effect
of chloride on the migration of pore solution and the saturation of concrete, surface scaling and
inner damage of concrete during freezing and thawing actions are accelerated. For a concrete
under flexural load, the crack propagation and the connection are intensified in the tensile stress
zone, which increases the probability of rupture failure. The evolution of residual strain of
concrete under combined freeze-thaw cycles, chloride attack and flexural load can be divided
into three phases like fatigue damage model. Deep work in this field need to be done so that the
relationship between residual strain and the number of freeze-thaw cycles can be established
for the service life prediction and durability design of concrete in cold regions.

Online publication : 2017
Publication type : full_text
Public price (Euros) : 0.00