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Study on durability and damage mechanism of concrete exposed to salt lake conditions



Title: Study on durability and damage mechanism of concrete exposed to salt lake conditions
Author(s): H. Yu, W. Sun, H. Ma
Paper category : conference
Book title: International Conference on Advances in Concrete and Structures
Editor(s): Ying-shu Yuan, Surendra P. Shah and Heng-lin Lü
Print-ISBN: 2-912143-41-1
e-ISBN: 2351580176
Publisher: RILEM Publications SARL
Publication year: 2003
Pages: 391 - 398
Total Pages: 8
Nb references: 10
Language: English


Abstract: 
Bittern-freezing-thawing durability of ordinarily concretes exposed to Xinjiang, Qinghai, Neimenggu and Xizang salt lakes were determined by the accelerated freezing-thawing test. The damage mechanism of ordinarily concretes under the combined action of two durability-factors, i.e. freezing-thawing cycling and chemical corrosion of salt lake bittern, were proposed. The compound and interaction effects of concrete damages caused by these two durability factors were quantitatively analyzed. According to the bittern-freezing-thawing durability of ordinary concrete soaked in various bitterns, the bitterns listed in descendent sequence were Qinghai, Xinjiang, pure water, Xizang, and Neimengu. Bittern-freezing-thawing induced deterioration of concretes was characterized as salt crystallization caused expansion cracks. Bittern-freezing-thawing induced damage effects was composed of both positive effects including lowering freeze point therefore abating freezing-thawing damage, and negative ones such as accelerating salt crystallization and thus speeding concrete expansion cracking. The equilibrium of these two effects determines the concrete's bittern-freezing-thawing damage mechanism.


Online publication: 2003-08-10
Publication type : full_text
Public price (Euros): 0.00


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