非饱和砂浆氯离子传输与pH分布相关性研究

doi:10.11896/cldb.20070324

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Abstract Chloride ion transportation and pH distribution of unsaturated mortar suffered from continuous immersion in chloride solution and drying-wetting cycles were investigated, and the influence of carbonation on chloride transportation was considered. What's more, the correlation between chloride transportation and pH distribution was analyzed systematically. The results show that the chloride transportation and pH distribution do not show a direct correlation when the dried mortars were suffered from continuous immersing in NaCl solution for different time. However, under the drying-wetting cycles, the chloride transportation of unsaturated mortar is closely related to pH distribution. The decrease of chloride content near the surface of mortar is consistent with the decrease of pH. For the unsaturated pre-carbonated mortar suffered from drying-wetting cycles, the chloride content distribution and pH distribution show the same characteristics, similar to “S” shape. The carbonation of unsaturated mortar changes the pH distribution and further affects the behavior of chloride transportation.

Key words： unsaturated concrete chloride ion carbonation durability

Published: 30 September 2021

CLC number:

TU528

Fund:This work was financially supported by the National Natural Science Foundation of China (51808508, 52078468).

About author:: Lin Yang received his doctor degree in 2017 from Southeast University. He works in the School of Water Conservancy Engineering, Zhengzhou University, as an associate professor. His research area is the durability of cement-based materials.

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	YANG Lin
	ZHANG Yunsheng
	ANDRADE Carmen
	ZHANG Chunxiao

Cite this article:

YANG Lin,ZHANG Yunsheng,ANDRADE Carmen, et al. Study on the Correlation Between Chloride Ion Transportation and pH Distribution in Unsaturated Mortar[J]. Materials Reports, 2021, 35(18): 18064-18068.

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http://www.mater-rep.com/EN/10.11896/cldb.20070324 OR http://www.mater-rep.com/EN/Y2021/V35/I18/18064

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