Sciences in Cold and Arid Regions ›› 2017, Vol. 9 ›› Issue (4): 384-391.doi: 10.3724/SP.J.1226.2017.00384

• ARTICLES • Previous Articles    

Concrete durability under different circumstances based on multi-factor effects

Feng Ming, ChengCheng Du, YuHang Liu, XiangYang Shi, DongQing Li   

  1. State Key Laboratory of Frozen Soil Engineering, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou, Gansu 730000, China
  • Received:2017-06-21 Revised:2017-07-21 Published:2018-11-23
  • Contact: DongQing Li, Professor, State Key Laboratory of Frozen Soil Engineering, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences. No. 320, West Donggang Road, Chengguan District, Lanzhou, Gansu 730000, China. Tel: +86-931-4967278; E-mail:
  • Supported by:
    This work is supported by the Key Research Program of Frontier Sciences of the Chinese Academy of Sciences (QYZDYSSW-DQC015) and the funding of the State Key Laboratory of Frozen Soil Engineering (No. SKLFSE-ZT-17).

Abstract: Concrete durability has become a hot research field in civil engineering. Concrete structures suffer salt-erosion damage to different degrees in the semi-arid region of North China. The environmental condition is one of the important factors affecting the durability of concrete constructions. To realize fully the interaction between various environmental factors, this paper researched concrete durability in the salt environment under combined actions (immersing, freeze–thaw cycles, and wet–dry cycles). According to the laboratory test data, the concrete-durability degradation law under coupling-effect factors was investigated. The results show that concrete's compressive strength decreases with the increase of salt concentration and immersion time. No matter what the environmental conditions were, the compressive strength-loss ratio increased with the test time. The compressive strength-test results indicate that sodium sulfate has the strongest corrosive effect on concrete durability, followed by calcium chloride, with sodium chloride having the weakest corrosion. Compared with the other two environmental factors, the wet–dry cycle is the key factor affecting concrete durability. Therefore, in engineering practice, the influence of environment conditions on the strength and durability of concrete should be taken into full consideration, especially in the wet–dry environment with salt conditions.

Key words: concrete durability, compressive strength, salt solution, wet–dry cycles, freeze–thaw cycles

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