硅酸盐通报 ›› 2026, Vol. 45 ›› Issue (9): 3017-3026.DOI: 10.16552/j.cnki.issn1001-1625.2026.0183
孙彬强1(
), 田茂盛1, 郑磊1, 谢超2(
), 代金鹏2, 谢登魁2
收稿日期:2026-03-02
修订日期:2026-04-30
出版日期:2026-09-15
发布日期:2026-10-09
通信作者:
谢 超,博士,副教授。E-mail:327600231@qq.com作者简介:孙彬强(1979—),男,高级工程师。主要从事工程管理工作和水泥基复合材料性能研究。E-mail:2573885013@qq.com
基金资助:
SUN Binqiang1(
), TIAN Maosheng1, ZHENG Lei1, XIE Chao2(
), DAI Jinpeng2, XIE Dengkui2
Received:2026-03-02
Revised:2026-04-30
Published:2026-09-15
Online:2026-10-09
摘要:
为探究高原低气压环境下剑麻纤维-水泥砂浆收缩性能及微观孔结构的发展规律,本文设置了57.6与95.0 kPa两种气压养护环境,采用5、10、15、20 mm剑麻纤维,制备了剑麻纤维-水泥砂浆试件,研究了其收缩性能、劈裂抗拉强度、微观孔结构及断裂面形貌。结果表明,养护环境气压下降会使各组试件的收缩率显著提升,劈裂抗拉强度下降,微观孔结构劣化。相较于95.0 kPa气压环境,57.6 kPa气压环境下试件的收缩率上升了5.9%~13.1%,劈裂抗拉强度下降了8.3%~10.9%,孔隙率增大了14.9%~21.9%,且孔径粗化。添加剑麻纤维能够抑制水泥砂浆的收缩,并提高其劈裂抗拉强度。相较于无纤维试件,剑麻纤维-水泥砂浆试件在57.6和95.0 kPa气压环境下的收缩率分别下降了5.3%~15.3%和3.0%~9.5%,劈裂抗拉强度分别提升了8.8%~29.4%和7.9%~26.3%。此外,10 mm剑麻纤维可在基体中良好分散并高效传递应力,其抑制水泥砂浆收缩及提升基体强度的效果最优。
中图分类号:
孙彬强, 田茂盛, 郑磊, 谢超, 代金鹏, 谢登魁. 低气压环境下剑麻纤维-水泥砂浆收缩性能及微观孔结构研究[J]. 硅酸盐通报, 2026, 45(9): 3017-3026.
SUN Binqiang, TIAN Maosheng, ZHENG Lei, XIE Chao, DAI Jinpeng, XIE Dengkui. Shrinkage Performance and Micro-Pore Structure of Sisal Fiber-Reinforced Cement Mortar under Low Atmospheric Pressure Environment[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2026, 45(9): 3017-3026.
| Item | Specific surface area/(m2·kg-1) | Initial setting time/min | Final setting time/min | Volume stability | SO3 mass fraction/% | MgO mass fraction/% | Ignition loss mass fraction/% | Cl- mass fraction/% |
|---|---|---|---|---|---|---|---|---|
| Standard requirement | ≥300 | ≥45 | ≤600 | Qualified | ≤3.5 | ≤5.0 | ≤5.0 | ≤0.06 |
| Measured value | 348 | 145 | 220 | Qualified | 2.4 | 2.0 | 1.6 | 0.012 |
表1 水泥性能指标
Table 1 Cement performance index
| Item | Specific surface area/(m2·kg-1) | Initial setting time/min | Final setting time/min | Volume stability | SO3 mass fraction/% | MgO mass fraction/% | Ignition loss mass fraction/% | Cl- mass fraction/% |
|---|---|---|---|---|---|---|---|---|
| Standard requirement | ≥300 | ≥45 | ≤600 | Qualified | ≤3.5 | ≤5.0 | ≤5.0 | ≤0.06 |
| Measured value | 348 | 145 | 220 | Qualified | 2.4 | 2.0 | 1.6 | 0.012 |
| Sieve size/mm | <0.15 | 0.15 | 0.30 | 0.60 | 1.18 | 2.36 | 4.75 |
|---|---|---|---|---|---|---|---|
| Cumulative sieve residual rate/% | 100 | 97.05 | 89.52 | 62.29 | 32.55 | 11.20 | 2.45 |
表2 河砂颗粒级配
Table 2 Grain gradation of river sand
| Sieve size/mm | <0.15 | 0.15 | 0.30 | 0.60 | 1.18 | 2.36 | 4.75 |
|---|---|---|---|---|---|---|---|
| Cumulative sieve residual rate/% | 100 | 97.05 | 89.52 | 62.29 | 32.55 | 11.20 | 2.45 |
| Fiber type | Length/mm | Diameter/μm | Density/(g·cm-3) | Tensile strength/MPa | Elasticity modulus/GPa |
|---|---|---|---|---|---|
| Sisal fiber | 5/10/15/20 | 300 | 1.35 | 500 | 15 |
表3 纤维性能指标
Table 3 Fiber performance index
| Fiber type | Length/mm | Diameter/μm | Density/(g·cm-3) | Tensile strength/MPa | Elasticity modulus/GPa |
|---|---|---|---|---|---|
| Sisal fiber | 5/10/15/20 | 300 | 1.35 | 500 | 15 |
| Group number | Blending amount (volume fraction)/% | Length/mm | Cement-sand ratio | Water-cement ratio |
|---|---|---|---|---|
| AFM0 | 0 | 0 | 2.5 | 0.38 |
| AFM5 | 1.0 | 5 | 2.5 | 0.38 |
| AFM10 | 1.0 | 10 | 2.5 | 0.38 |
| AFM15 | 1.0 | 15 | 2.5 | 0.38 |
| AFM20 | 1.0 | 20 | 2.5 | 0.38 |
表4 剑麻纤维-水泥砂浆试件配合比
Table 4 Mix proportion of sisal fiber-reinforced cement mortar
| Group number | Blending amount (volume fraction)/% | Length/mm | Cement-sand ratio | Water-cement ratio |
|---|---|---|---|---|
| AFM0 | 0 | 0 | 2.5 | 0.38 |
| AFM5 | 1.0 | 5 | 2.5 | 0.38 |
| AFM10 | 1.0 | 10 | 2.5 | 0.38 |
| AFM15 | 1.0 | 15 | 2.5 | 0.38 |
| AFM20 | 1.0 | 20 | 2.5 | 0.38 |
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