Research and Application of Materials Science

Development of a Rapid Test Bar for Quantitative Detection of Chloride Ions in Fresh Concrete

ZHANGYingjie, WEIShujie, PANWen, JIXuping, SONGZijian


Due to the shortage of natural raw materials, many practitioners proposed to make concrete from desalinated sea sand. To reduce the risk of abuse of uncleaned sea sand, we proposed a new rapid test bar to detect chloride ions in fresh concrete quantitatively. The test bars were prepared by mixing silver chromate with cotton fiber. By virtue of the high liquid-absorbent capacity of cotton fiber, the chloride-contained liquid in fresh concrete will rapidly enter into the test bar and react with the silver chromate to finally show a certain coloring height, which corresponds to the actual chloride content. In order to optimize the preparation process, the color rendering, testing time and stability of test rods under different mixing ratios and conditions were investigated. The relationship between color height and chloride content was established, and an auxiliary card is prepared for user-friendly calculation of chloride content. The results showed that the best performance of the test bar was obtained under the following conditions: mass concentration of silver chromate 5.0g/L, soaking time 1 min, drying temperature 50℃ and content of discolored silica gel 0.5g/ root.


Test bar; Chloride ion; Concrete; Cotton fiber

Full Text:



L Tian. General situation and some characteristics of durability research of Concrete Structures. Construction Structure. 1995: 12, 44-90.

Z J Cheng, D Song, J H Jiang, et al. Research progress on corrosion and Protection of reinforcement in concrete. Thermal Processing Technology. 2016, 45: 14-19.

S Z Xue. Deterioration and repair of concrete structures. Tunnels and rail transit. 2019: 1-4.

Y G Yu, W G A Castel, A R Liu, et al. Modelling steel corrosion under concrete non-uniformity and structural defects. Cement and Concrete Research. 2020: 135.

Z Y Li. Aging treatment of hydraulic concrete buildings. Knowledge Economy. 2009, 7: 186.

B.R. Hong, D. Zhang, P. Wang. Current situation and future of Marine corrosion protection. Journal of Chinese Academy of Sciences. 2016, 31, 1326-1331.

E R Grist, K A Paine, A Heath, et al. Structural and durability properties of hydraulic lime–pozzolan concretes. Cement and Concrete Composites. 2015: 62.

J W Bao, J N Wei, P Zhang, et al. Research progress on similarity of Concrete resistance to Chloride Ion erosion in Marine environment. Journal of Silicate. 2020, 48: 689-704.

K K Gao, W F Cui, P. Zhang, et al. Advances in research on corrosion of reinforced concrete induced by alkali under chloride erosion. Bulletin of Silicate. 2020, 6: 1-9.

H M Jia, G.P. Yan, G.J. Yan. Research on reinforcement corrosion in concrete. Chinese Journal of Safety Science. 2005, 5: 56-60.

W P Zhang, X L Gu, X Y Jin, et al. Study on corrosion mechanism and Mechanical properties of Corroded Reinforcement in concrete. Journal of Building Structures. 2010, 31: 327-332.

R G Du, Y Liu, C J Lin. Effect of chloride ion on corrosion mechanism of reinforcement and its research progress. Material Protection. 2006, 6: 45-133.

X J Li. Exploration and Utilization and Ownership Management of Marine sand resources at home and abroad. Cooperative Economy and Science and Technology. 2018, 24: 49-51.

F G Leng, W Ding, Y X Zhou, et al. Some Key points of Marine sand concrete application technology. Construction technology. 2011, 40: 97-100.

F He, J X Ji. Effect of sea sand on concrete durability and desalination treatment, Cement engineering. 2015, 4: 72-75.

X Y Song, Z P Jiang, J Y Han, et al. Study on reinforcement corrosion in sea sand concrete. Concrete and cement products. 2019, 9: 19-23.

J H Chen, W J Pan. Research on the determination method of Chloride ion content in fresh concrete. Guangdong Civil and Architecture. 2015, 22: 137-139.

N F Hong. Corrosion of sea sand and harm of "sea sand house". Industrial Building. 2004, 11: 65-67.

Y Q Li. Detection technology of chloride ion content in site premix concrete. Construction machinery. 2019, 7: 102-213.

L J Li. Chlorine ion mechanism in concrete and its detection technology. Low carbon world. 2019, 9: 323-324.

L T Hao, K L Luo, S X Zhang, et al. Determination of chlorine ions in natural water by ion selective electrode. Journal of Inspection and Quarantine. 2019, 29: 25-28.



  • There are currently no refbacks.

Copyright (c) 2021 Yingjie ZHANG, Shujie WEI, Wen PAN, Xuping JI, Zijian SONG

Creative Commons License
This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.