硅酸盐通报 ›› 2026, Vol. 45 ›› Issue (6): 2021-2033.DOI: 10.16552/j.cnki.issn1001-1625.2025.1224
收稿日期:2025-12-08
修订日期:2026-01-13
出版日期:2026-06-15
发布日期:2026-07-14
通信作者:
陈娟,博士,教授。E-mail:chenjuan9876@163.com作者简介:王晓彬(2001—),男,硕士研究生。主要从事地聚合物胶凝材料的研究。E-mail:wxb.stu@yangtzeu.edu.cn
基金资助:
WANG Xiaobin1(
), LUO Liting1, HE Zixiang1, CHEN Juan1,2(
)
Received:2025-12-08
Revised:2026-01-13
Published:2026-06-15
Online:2026-07-14
摘要:
为探究偏高岭土地聚合物砂浆在海洋环境中的服役性能,本文重点研究了硅灰石和矿渣复掺改性偏高岭土地聚合物砂浆在海水干湿循环与全浸泡两种侵蚀方式下的性能劣化规律与机理。以硅灰石与矿渣的质量比(1∶2、1∶1和2∶1)为变量,制备了硅灰石-矿渣-偏高岭土地聚合物砂浆及纯偏高岭土砂浆(MK),对比研究了在0~90个侵蚀周期内的表观形貌与物理性能、力学性能变化,并结合SEM、XRD等微观测试手段分析劣化机制。结果表明,干湿循环的破坏远大于全浸泡,这是因为干湿循环是一种由盐结晶压力和离子“泵吸”效应驱动的“物理-化学”耦合侵蚀。硅灰石和矿渣复掺能显著提升偏高岭土地聚合物砂浆的抗侵蚀耐久性,其中硅灰石和矿渣的质量比为1∶1(WSM15)时性能最佳。与基准MK相比,WSM15的抗压强度提升了59.3%,质量损失率降低了30.97%。复掺的增效作用源于硅灰石和矿渣的物理、化学协同效应。
中图分类号:
王晓彬, 罗李亭, 何梓湘, 陈娟. 海水干湿循环下硅灰石-矿渣-偏高岭土地聚合物的性能与机理[J]. 硅酸盐通报, 2026, 45(6): 2021-2033.
WANG Xiaobin, LUO Liting, HE Zixiang, CHEN Juan. Performance and Mechanism of Wollastonite-Slag-Metakaolin Geopolymer under Seawater Wet-Dry Cycles[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2026, 45(6): 2021-2033.
| Material | Mass fraction/% | |||||||
|---|---|---|---|---|---|---|---|---|
| SiO2 | Al2O3 | Fe2O3 | CaO | MgO | K2O | Na2O | SO3 | |
| Metakaolin | 54.00 | 43.00 | 0.40 | 0.09 | 0.04 | 0.30 | 0.03 | — |
| Wollastonite | 41.80 | 0.36 | 0.31 | 54.91 | 1.75 | — | — | — |
| Slag | 34.50 | 17.70 | 1.03 | 34.00 | 6.01 | — | — | 1.64 |
表1 原材料的主要化学成分
Table 1 Main chemical composition of raw materials
| Material | Mass fraction/% | |||||||
|---|---|---|---|---|---|---|---|---|
| SiO2 | Al2O3 | Fe2O3 | CaO | MgO | K2O | Na2O | SO3 | |
| Metakaolin | 54.00 | 43.00 | 0.40 | 0.09 | 0.04 | 0.30 | 0.03 | — |
| Wollastonite | 41.80 | 0.36 | 0.31 | 54.91 | 1.75 | — | — | — |
| Slag | 34.50 | 17.70 | 1.03 | 34.00 | 6.01 | — | — | 1.64 |
| Item | Density/(g·cm-3) | Na2O content/% | SiO2 content/% | H2O content/% | Solid content/% | Modulus Ms | pH value |
|---|---|---|---|---|---|---|---|
| Value | 1.36 | 8.54 | 26.98 | 64.48 | 35.50 | 3.30 | 10~13 |
表2 Na2SiO3溶液的主要特征指标
Table 2 Main characteristic indicators of Na2SiO3 solution
| Item | Density/(g·cm-3) | Na2O content/% | SiO2 content/% | H2O content/% | Solid content/% | Modulus Ms | pH value |
|---|---|---|---|---|---|---|---|
| Value | 1.36 | 8.54 | 26.98 | 64.48 | 35.50 | 3.30 | 10~13 |
| Ingredient | NaCl | MgCl2 | Na2SO4 | CaCl2 | KCl | NaHCO3 |
|---|---|---|---|---|---|---|
| Concentration/(g·L-1) | 122.7 | 25.6 | 20.5 | 5.8 | 3.5 | 1.0 |
表3 模拟海水溶液各溶质浓度
Table 3 Solute concentrations in simulated seawater
| Ingredient | NaCl | MgCl2 | Na2SO4 | CaCl2 | KCl | NaHCO3 |
|---|---|---|---|---|---|---|
| Concentration/(g·L-1) | 122.7 | 25.6 | 20.5 | 5.8 | 3.5 | 1.0 |
| Group | Metakaolin/B | Slag/B | Wollastonite/B | Sand/B | Added water/B | NaOH/B | Na2SiO3 solution/B |
|---|---|---|---|---|---|---|---|
| MK | 1.000 | 0 | 0 | 2.500 | 0.209 | 0.088 | 0.453 |
| WSM10 | 0.700 | 0.200 | 0.100 | 2.500 | 0.209 | 0.088 | 0.453 |
| WSM15 | 0.700 | 0.150 | 0.150 | 2.500 | 0.209 | 0.088 | 0.453 |
| WSM20 | 0.700 | 0.100 | 0.200 | 2.500 | 0.209 | 0.088 | 0.453 |
表4 地聚合物砂浆配合比
Table 4 Mix proportion of geopolymer mortar
| Group | Metakaolin/B | Slag/B | Wollastonite/B | Sand/B | Added water/B | NaOH/B | Na2SiO3 solution/B |
|---|---|---|---|---|---|---|---|
| MK | 1.000 | 0 | 0 | 2.500 | 0.209 | 0.088 | 0.453 |
| WSM10 | 0.700 | 0.200 | 0.100 | 2.500 | 0.209 | 0.088 | 0.453 |
| WSM15 | 0.700 | 0.150 | 0.150 | 2.500 | 0.209 | 0.088 | 0.453 |
| WSM20 | 0.700 | 0.100 | 0.200 | 2.500 | 0.209 | 0.088 | 0.453 |
| Group | Rm | N | Experimental value/% | Fitted value/% | Absolute error | Relative error/% |
|---|---|---|---|---|---|---|
| WSM10 | 0.5 | 0 | 100.00 | 99.91 | 0.09 | 0.09 |
| 15 | 84.74 | 87.75 | 3.01 | 3.55 | ||
| 30 | 74.39 | 77.66 | 3.28 | 4.41 | ||
| 60 | 65.12 | 63.72 | 1.40 | 2.16 | ||
| 90 | 55.31 | 58.08 | 2.76 | 4.99 | ||
| WSM15 | 1.0 | 0 | 100.00 | 99.93 | 0.07 | 0.07 |
| 15 | 91.65 | 88.20 | 3.45 | 3.76 | ||
| 30 | 81.84 | 78.56 | 3.28 | 4.01 | ||
| 60 | 74.95 | 65.49 | 9.46 | 12.62 | ||
| 90 | 70.56 | 60.72 | 9.84 | 13.95 | ||
| WSM20 | 2.0 | 0 | 100.00 | 99.96 | 0.04 | 0.04 |
| 15 | 91.21 | 89.11 | 2.10 | 2.31 | ||
| 30 | 74.68 | 80.34 | 5.66 | 7.58 | ||
| 60 | 65.63 | 69.02 | 3.39 | 5.17 | ||
| 90 | 61.76 | 66.01 | 4.26 | 6.89 |
表5 地聚合物砂浆相对动弹性模量试验值与拟合值
Table 5 Experimental and fitted values of relative dynamic elastic modulus of geopolymer mortar
| Group | Rm | N | Experimental value/% | Fitted value/% | Absolute error | Relative error/% |
|---|---|---|---|---|---|---|
| WSM10 | 0.5 | 0 | 100.00 | 99.91 | 0.09 | 0.09 |
| 15 | 84.74 | 87.75 | 3.01 | 3.55 | ||
| 30 | 74.39 | 77.66 | 3.28 | 4.41 | ||
| 60 | 65.12 | 63.72 | 1.40 | 2.16 | ||
| 90 | 55.31 | 58.08 | 2.76 | 4.99 | ||
| WSM15 | 1.0 | 0 | 100.00 | 99.93 | 0.07 | 0.07 |
| 15 | 91.65 | 88.20 | 3.45 | 3.76 | ||
| 30 | 81.84 | 78.56 | 3.28 | 4.01 | ||
| 60 | 74.95 | 65.49 | 9.46 | 12.62 | ||
| 90 | 70.56 | 60.72 | 9.84 | 13.95 | ||
| WSM20 | 2.0 | 0 | 100.00 | 99.96 | 0.04 | 0.04 |
| 15 | 91.21 | 89.11 | 2.10 | 2.31 | ||
| 30 | 74.68 | 80.34 | 5.66 | 7.58 | ||
| 60 | 65.63 | 69.02 | 3.39 | 5.17 | ||
| 90 | 61.76 | 66.01 | 4.26 | 6.89 |
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