硅酸盐通报 ›› 2026, Vol. 45 ›› Issue (7): 2226-2236.DOI: 10.16552/j.cnki.issn1001-1625.2026.0054
曹宇杰1(
), 刘律2, 黄栋2, 黄超群2, 刘云鹏1(
)
收稿日期:2026-01-14
修订日期:2026-03-03
出版日期:2026-07-15
发布日期:2026-08-13
通信作者:
刘云鹏,博士,研究员。E-mail:liuyunpeng@whut.edu.cn作者简介:曹宇杰(2001—),男,硕士研究生。主要从事安全与防护材料的研究。E-mail:344741@whut.edu.cn
基金资助:
CAO Yujie1(
), LIU Lv2, HUANG Dong2, HUANG Chaoqun2, LIU Yunpeng1(
)
Received:2026-01-14
Revised:2026-03-03
Published:2026-07-15
Online:2026-08-13
摘要:
超细水泥(UPC)在混凝土微裂缝修复中面临低水灰比下浆体流动性差、孔隙率高、易溶蚀等问题。本研究提出采用油酸对UPC进行表面改性,以同步提高其可注性与疏水性。采用球磨法制备了油酸掺量为0%~0.3%(质量分数)的油酸改性UPC。系统评估了改性UPC浆体的流变性能、抗压强度、水化热、疏水特性、界面粘接强度,并通过FTIR、SEM、TG、LF-NMR等微观手段揭示其改性机理。结果表明:适量(0.1%)油酸改性可降低注浆材料的黏度,改善流变特性;同时,该掺量下油酸对水泥水化的抑制作用较小,对浆体的强度影响不大,并显著降低浆体的自收缩。油酸参与水泥颗粒表面改性,使硬化后浆体的接触角从48.6°增至126.4°。然而,过量(>0.2%)油酸会严重抑制水化反应,使浆体28 d抗压强度从54.95 MPa降至23.08 MPa,并且增大自收缩与孔隙率。本研究探讨了油酸在UPC中的作用机制与掺量阈值,为开发高性能微裂缝防渗修复材料提供了支撑。
中图分类号:
曹宇杰, 刘律, 黄栋, 黄超群, 刘云鹏. 油酸改性超细水泥对注浆材料性能的影响[J]. 硅酸盐通报, 2026, 45(7): 2226-2236.
CAO Yujie, LIU Lv, HUANG Dong, HUANG Chaoqun, LIU Yunpeng. Influence of Oleic Acid Modified Ultrafine Cement on Performance of Grouting Materials[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2026, 45(7): 2226-2236.
| Chemical composition | SiO2 | CaO | Al2O3 | Fe2O3 | MgO | SO3 | K2O | Na2O | TiO2 | LOl |
|---|---|---|---|---|---|---|---|---|---|---|
| Mass fraction/% | 22.93 | 60.65 | 4.23 | 3.05 | 4.01 | 2.56 | 0.46 | 0.23 | 0.47 | 1.41 |
表1 超细水泥的化学组成
Table 1 Chemical composition of ultrafine cement
| Chemical composition | SiO2 | CaO | Al2O3 | Fe2O3 | MgO | SO3 | K2O | Na2O | TiO2 | LOl |
|---|---|---|---|---|---|---|---|---|---|---|
| Mass fraction/% | 22.93 | 60.65 | 4.23 | 3.05 | 4.01 | 2.56 | 0.46 | 0.23 | 0.47 | 1.41 |
| Indicator | Flexural strength/MPa | Compressive strength/MPa | Setting time/min | |||||
|---|---|---|---|---|---|---|---|---|
| 3 d | 7 d | 28 d | 3 d | 7 d | 28 d | Initial | Final | |
| Value | 7.10 | 8.35 | 9.10 | 27.40 | 44.80 | 59.70 | 125 | 195 |
表2 超细水泥的物理性能
Table 2 Physical properties of ultrafine cement
| Indicator | Flexural strength/MPa | Compressive strength/MPa | Setting time/min | |||||
|---|---|---|---|---|---|---|---|---|
| 3 d | 7 d | 28 d | 3 d | 7 d | 28 d | Initial | Final | |
| Value | 7.10 | 8.35 | 9.10 | 27.40 | 44.80 | 59.70 | 125 | 195 |
| Sample | Mass/g | W/C | ||
|---|---|---|---|---|
| UPC | Water | OA | ||
| S | 200 | 100 | 0 | 0.5 |
| A | 200 | 100 | 0.2 | 0.5 |
| B | 200 | 100 | 0.4 | 0.5 |
| C | 200 | 100 | 0.6 | 0.5 |
表3 注浆材料的基础配合比
Table 3 Basic mix ratio of grouting material
| Sample | Mass/g | W/C | ||
|---|---|---|---|---|
| UPC | Water | OA | ||
| S | 200 | 100 | 0 | 0.5 |
| A | 200 | 100 | 0.2 | 0.5 |
| B | 200 | 100 | 0.4 | 0.5 |
| C | 200 | 100 | 0.6 | 0.5 |
| Sample | W/C | Herschel-Bulkley model | τ₀/Pa | n | R2/% |
|---|---|---|---|---|---|
| S | 0.5 | y=23.52+3.82x0.57 | 23.52 | 0.57 | 99.96 |
| A | 0.5 | y=23.93+0.56x0.47 | 23.93 | 0.47 | 99.68 |
| B | 0.5 | y=24.91+2.52x0.62 | 24.91 | 0.62 | 99.94 |
| C | 0.5 | y=36.57+0.69x0.74 | 36.57 | 0.74 | 99.68 |
表4 基于Herschel-Bulkley模型的流变参数拟合结果
Table 4 Fitting results of rheological parameters based on Herschel-Bulkley model
| Sample | W/C | Herschel-Bulkley model | τ₀/Pa | n | R2/% |
|---|---|---|---|---|---|
| S | 0.5 | y=23.52+3.82x0.57 | 23.52 | 0.57 | 99.96 |
| A | 0.5 | y=23.93+0.56x0.47 | 23.93 | 0.47 | 99.68 |
| B | 0.5 | y=24.91+2.52x0.62 | 24.91 | 0.62 | 99.94 |
| C | 0.5 | y=36.57+0.69x0.74 | 36.57 | 0.74 | 99.68 |
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