硅酸盐通报 ›› 2026, Vol. 45 ›› Issue (6): 1959-1967.DOI: 10.16552/j.cnki.issn1001-1625.2025.1246
收稿日期:2025-12-15
修订日期:2026-02-10
出版日期:2026-06-15
发布日期:2026-07-14
作者简介:唐佩(1987—),女,博士,研究员。主要从事生态建筑材料的研究。E-mail:pei-tang@whut.edu.cn
基金资助:
TANG Pei1(
), ZHAO Dongsheng2, CHEN Wei1
Received:2025-12-15
Revised:2026-02-10
Published:2026-06-15
Online:2026-07-14
摘要:
钙矾石是硫酸盐基低碳胶凝材料的主要水化产物,对材料力学性能、耐久性等有重要影响,探究钙矾石的形成与演化过程至关重要。铝相常被用作调控钙矾石生长的关键组分,现有研究多关注外掺铝相对低碳胶凝材料宏观性能的提升,而对钙矾石的形成机制尚需深入完善。本文以六水氯化铝(AC)、十八水合硫酸铝(AS)、聚合硫酸铝(PAS)、偏铝酸钠(NA)四种铝相为原料合成钙矾石,并研究铝相种类对合成钙矾石生长行为及稳定性的影响。结果表明:60 ℃是钙矾石的最佳合成温度,其中AS参与形成的钙矾石质量分数最高,为94.23%;与其他铝相相比,AS参与形成的钙矾石晶体最大失重温度为120.4 ℃,热稳定性最优,晶体结构更稳定,长径比变化幅度小,分布在14.5左右。本研究为后续低碳胶凝材料体系的优化设计与性能提升提供了理论基础。
中图分类号:
唐佩, 赵东升, 陈伟. 铝相对钙矾石生长调控及稳定性研究[J]. 硅酸盐通报, 2026, 45(6): 1959-1967.
TANG Pei, ZHAO Dongsheng, CHEN Wei. Regulation and Stability of Ettringite Growth by Aluminum Phases[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2026, 45(6): 1959-1967.
| Composition | Na2O | MgO | Al2O3 | SiO2 | SO3 | Cl | CaO | Fe2O3 | LOI |
|---|---|---|---|---|---|---|---|---|---|
| Mass fraction/% | 0.04 | 0.02 | 8.72 | 0.06 | 15.81 | 0.01 | 0.03 | 0.01 | 75.30 |
表1 PAS化学成分分析
Table 1 PAS chemical composition analysis
| Composition | Na2O | MgO | Al2O3 | SiO2 | SO3 | Cl | CaO | Fe2O3 | LOI |
|---|---|---|---|---|---|---|---|---|---|
| Mass fraction/% | 0.04 | 0.02 | 8.72 | 0.06 | 15.81 | 0.01 | 0.03 | 0.01 | 75.30 |
| Sample | Peak 1 | Peak 2 | |||
|---|---|---|---|---|---|
| Temperature/℃ | Mass loss/% | Temperature/℃ | Mass loss/% | ||
| 60 ℃ | AC-AFt | 117.5 | 32.9 | 250.4 | 4.8 |
| AS-AFt | 120.4 | 32.7 | 251.5 | 4.9 | |
| PAS-AFt | 116.8 | 30.3 | 257.6 | 5.6 | |
| NA-AFt | 115.5 | 30.2 | 248.7 | 4.7 | |
| 80 ℃ | AC-AFt | 116.8 | 21.1 | 247.3 | 7.1 |
| AS-AFt | 119.2 | 20.8 | 250.5 | 5.9 | |
| PAS-AFt | 116.2 | 18.6 | 256.1 | 7.1 | |
| NA-AFt | 114.8 | 18.2 | 245.2 | 6.1 | |
表2 不同温度段晶体的质量损失
Table 2 Mass loss of crystals at different temperature ranges
| Sample | Peak 1 | Peak 2 | |||
|---|---|---|---|---|---|
| Temperature/℃ | Mass loss/% | Temperature/℃ | Mass loss/% | ||
| 60 ℃ | AC-AFt | 117.5 | 32.9 | 250.4 | 4.8 |
| AS-AFt | 120.4 | 32.7 | 251.5 | 4.9 | |
| PAS-AFt | 116.8 | 30.3 | 257.6 | 5.6 | |
| NA-AFt | 115.5 | 30.2 | 248.7 | 4.7 | |
| 80 ℃ | AC-AFt | 116.8 | 21.1 | 247.3 | 7.1 |
| AS-AFt | 119.2 | 20.8 | 250.5 | 5.9 | |
| PAS-AFt | 116.2 | 18.6 | 256.1 | 7.1 | |
| NA-AFt | 114.8 | 18.2 | 245.2 | 6.1 | |
| Sample | NA-AFt | AS-AFt | PAS-AFt | AC-AFt |
|---|---|---|---|---|
| Length-to-diameter ratio | 4.90~18.29 | 14.38~14.65 | 12.21~15.94 | 16.81~23.49 |
表3 钙矾石晶体的长径比(60 ℃)
Table 3 Length-to-diameter ratio of ettringite crystals (60 ℃)
| Sample | NA-AFt | AS-AFt | PAS-AFt | AC-AFt |
|---|---|---|---|---|
| Length-to-diameter ratio | 4.90~18.29 | 14.38~14.65 | 12.21~15.94 | 16.81~23.49 |
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