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Updated: Jan 9, 2026

Expression of Cementitious Pore Solution and the Analysis of Its Chemical Composition and Resistivity Using X-ray Fluorescence
06:27

Expression of Cementitious Pore Solution and the Analysis of Its Chemical Composition and Resistivity Using X-ray Fluorescence

Published on: September 23, 2018

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研究硫酸盐攻击下水泥材料的孔隙分布特征和强度降解的研究

Yuhang Li1,2, Enze Hao1,2, Xiumei Zheng3,4

  • 1College of Civil Engineering, Kashi University, Kashi, 844006, China.

Scientific reports
|December 7, 2025
PubMed
概括

硫酸盐侵蚀最初会增强基于水泥的材料,但长时间暴露会降低其质量和压力强度. 孔径变化因材料类型和测试方法而异,影响整体性能.

关键词:
基于水泥的材料是基于水泥的材料.压力强度的压力强度是什么多孔性 多孔性质量变化 质量变化硫酸盐腐蚀是因为硫酸盐的腐蚀.

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Detecting the Water-soluble Chloride Distribution of Cement Paste in a High-precision Way07:42

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Sulfate Attack on Concrete

Sulfate attack on concrete is a deterioration process characterized by a whitish discoloration beginning at the edges and corners, accompanied by cracking and spalling. This phenomenon occurs when sulfates react with the components of hardened concrete, forming compounds like calcium sulfate and calcium sulfoaluminate which occupy more space than the substances they replace, causing the concrete to expand and disrupt.
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In concrete, the pore size distribution significantly influences the material's properties. Capillary pores, markedly larger than gel pores, form a vast network within partially hydrated cement paste, reducing the concrete's strength and increasing its permeability. This heightened permeability leads to a greater risk of damage from environmental factors like freeze-thaw cycles and chemical attacks, with the extent of vulnerability also being tied to the water-to-cement ratio.
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Acid Attack on Concrete

When acids come into contact with concrete, they initiate a chemical reaction that dissolves the hydrated cement paste. This process leads to softening and structural weakening of the concrete. This issue is commonly observed in environments such as chimneys, sewers, and industrial settings. The severity of the damage increases as the pH of the water interacting with the concrete drops below 6.5. In particular, a pH under 4.5 can cause significant concrete damage.
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