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Study on the erosion mechanism of calcium-based sand erosion-resistant materials in an ion-stress coupled environment.

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Title: Study on the erosion mechanism of calcium-based sand erosion-resistant materials in an ion-stress coupled environment.
Authors: Wang, Tianshu1 (AUTHOR), Li, Peng1 (AUTHOR) lp@ouc.edu.cn, Yang, Feiyu1 (AUTHOR), Yi, Kai1 (AUTHOR)
Source: Marine Georesources & Geotechnology. Apr2026, Vol. 44 Issue 4, p799-813. 15p.
Subjects: Material erosion, Building material durability, Compressive strength, Seawater corrosion, Magnesium ions, Environmental engineering, Chloride ions
Abstract: This study investigates the weakening laws and erosion mechanisms of Cl−, S O 4 2 − , and Mg2+ ions on grouted solids via seawater erosion tests. Single-ion solutions simulate the marine environment under varying erosion durations and confining pressures. Through compressive strength tests, triaxial experiments, and SEM/EDS analyses, material performance evolution is evaluated. Results show Cl− increases compressive strength from 6.84 MPa to 11.24 MPa at 30 days, but causes a 21.5% decline at 120 days. S O 4 2 − - reduces the 120-day compressive strength resistance coefficient to 0.369, indicating a 63.1% degradation. Mg2+ generates Mg(OH)2 and M-S-H gel, increasing surface hardness with minimal strength change. Microscopic observations reveal ions degrade structures via chemical erosion and physical crystallization synergism, with S O 4 2 − dominating long-term deterioration. These findings support durability design and protection strategies for marine grouting materials. [ABSTRACT FROM AUTHOR]
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Database: Engineering Source
Description
Abstract:This study investigates the weakening laws and erosion mechanisms of Cl−, S O 4 2 − , and Mg2+ ions on grouted solids via seawater erosion tests. Single-ion solutions simulate the marine environment under varying erosion durations and confining pressures. Through compressive strength tests, triaxial experiments, and SEM/EDS analyses, material performance evolution is evaluated. Results show Cl− increases compressive strength from 6.84 MPa to 11.24 MPa at 30 days, but causes a 21.5% decline at 120 days. S O 4 2 − - reduces the 120-day compressive strength resistance coefficient to 0.369, indicating a 63.1% degradation. Mg2+ generates Mg(OH)2 and M-S-H gel, increasing surface hardness with minimal strength change. Microscopic observations reveal ions degrade structures via chemical erosion and physical crystallization synergism, with S O 4 2 − dominating long-term deterioration. These findings support durability design and protection strategies for marine grouting materials. [ABSTRACT FROM AUTHOR]
ISSN:1064119X
DOI:10.1080/1064119X.2025.2533987