硅酸盐通报 ›› 2026, Vol. 45 ›› Issue (4): 1304-1314.DOI: 10.16552/j.cnki.issn1001-1625.2025.0900
收稿日期:2025-09-08
修订日期:2025-09-28
出版日期:2026-04-20
发布日期:2026-05-14
通信作者:
罗玲,副教授。E-mail:24522597@qq.com作者简介:谌君诚(1999—),男,硕士研究生。主要从事建筑固体废弃物回收利用的研究。E-mail:1021830265@qq.com
基金资助:
CHEN Juncheng(
), LUO Ling(
), QIN Yongjun, GUO Yangguang, LI Qi, CHENG Hao
Received:2025-09-08
Revised:2025-09-28
Published:2026-04-20
Online:2026-05-14
摘要:
本文主要研究了硅灰(SF)和聚甲醛(POM)纤维掺量对再生水工混凝土力学性能和耐水性能的影响。试验选用新疆地区再生粗骨料(RCA),设计12组配合比,探讨硅灰(0%、5%、10%,质量分数)和POM纤维(0%、0.3%、0.6%、0.9%,体积分数)掺量对再生水工混凝土立方体抗压强度、劈裂抗拉强度、抗折强度、软化系数及毛细吸水量的影响规律。试验结果表明,与未掺硅灰和POM纤维的基准组相比,单独掺入10%的硅灰时,试件的28 d立方体抗压强度提高了16.49%。单独掺入0.6%的POM纤维时,试件的28 d劈裂抗拉强度提高了36.46%。复掺5%的硅灰和0.6%的POM纤维时,试件的28 d立方体抗压强度、劈裂抗拉强度和抗折强度分别提高了19.96%、49.10%和43.94%。复掺5%的硅灰和0.3%的POM纤维时,试件的软化系数提高10.88%,672 h毛细吸水量降低26.38%,说明复掺策略的性能改善效果更为显著,其机理在于优化微观结构并减少微裂缝;但过量掺入(如10%硅灰+ 0.9%POM纤维)则会因团聚效应和水分竞争导致性能劣化。本研究为新疆地区水利工程提供了一种高性能再生混凝土的优化配比方案。
中图分类号:
谌君诚, 罗玲, 秦拥军, 郭阳光, 李琦, 程昊. 硅灰-聚甲醛纤维再生水工混凝土力学和耐水性能研究[J]. 硅酸盐通报, 2026, 45(4): 1304-1314.
CHEN Juncheng, LUO Ling, QIN Yongjun, GUO Yangguang, LI Qi, CHENG Hao. Mechanical Properties and Water Resistance of Recycled Hydraulic Concrete with Silica Fume and Polyoxymethylene Fiber[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2026, 45(4): 1304-1314.
| Aggregatetype | Apparent density/(kg·m-3) | Packing density/(kg·m-3) | Void ratio/% | Mud content/% | Crushing indicator/% | Water absorption/% | Fineness modulus |
|---|---|---|---|---|---|---|---|
| RCA | 2 469 | 1 429 | 42.1 | 0.9 | 8.2 | 4.2 | — |
| Sand | 2 577 | 1 581 | 38.4 | 0.9 | — | — | 2.6 |
表1 骨料的基本性能
Table 1 Basic properties of aggregates
| Aggregatetype | Apparent density/(kg·m-3) | Packing density/(kg·m-3) | Void ratio/% | Mud content/% | Crushing indicator/% | Water absorption/% | Fineness modulus |
|---|---|---|---|---|---|---|---|
| RCA | 2 469 | 1 429 | 42.1 | 0.9 | 8.2 | 4.2 | — |
| Sand | 2 577 | 1 581 | 38.4 | 0.9 | — | — | 2.6 |
| Material | Mass fraction/% | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| CaO | SiO2 | MgO | Al2O3 | SO3 | MgO | Na2O | K2O | Cl | Other | |
| Cement | 52.77 | 23.40 | 4.44 | 6.82 | 1.14 | 2.46 | 1.14 | — | — | 4.91 |
| Silica fume | 0.38 | 96.38 | 0.67 | 1.07 | 0.46 | — | — | 0.62 | 0.27 | 0.15 |
表2 胶凝材料的主要化学成分
Table 2 Main chemical composition of cementitious materials
| Material | Mass fraction/% | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| CaO | SiO2 | MgO | Al2O3 | SO3 | MgO | Na2O | K2O | Cl | Other | |
| Cement | 52.77 | 23.40 | 4.44 | 6.82 | 1.14 | 2.46 | 1.14 | — | — | 4.91 |
| Silica fume | 0.38 | 96.38 | 0.67 | 1.07 | 0.46 | — | — | 0.62 | 0.27 | 0.15 |
| Specimen | Mix proportion/(kg·m-3) | ||||||
|---|---|---|---|---|---|---|---|
| Cement | Silica fume | POM fiber | RCA | Sand | Water | Water reducer | |
| S0P0 | 400 | 0 | 0 | 1 073.8 | 746.2 | 160 | 2 |
| S0P0.3 | 400 | 0 | 4.23 | 1 073.8 | 746.2 | 160 | 2 |
| S0P0.6 | 400 | 0 | 8.46 | 1 073.8 | 746.2 | 160 | 2 |
| S0P0.9 | 400 | 0 | 12.69 | 1 073.8 | 746.2 | 160 | 2 |
| S5P0 | 380 | 20 | 0 | 1 073.8 | 746.2 | 160 | 2 |
| S5P0.3 | 380 | 20 | 4.23 | 1 073.8 | 746.2 | 160 | 2 |
| S5P0.6 | 380 | 20 | 8.46 | 1 073.8 | 746.2 | 160 | 2 |
| S5P0.9 | 380 | 20 | 12.69 | 1 073.8 | 746.2 | 160 | 2 |
| S10P0 | 360 | 40 | 0 | 1 073.8 | 746.2 | 160 | 2 |
| S10P0.3 | 360 | 40 | 4.23 | 1 073.8 | 746.2 | 160 | 2 |
| S10P0.6 | 360 | 40 | 8.46 | 1 073.8 | 746.2 | 160 | 2 |
| S10P0.9 | 360 | 40 | 12.69 | 1 073.8 | 746.2 | 160 | 2 |
表3 RHC配合比
Table 3 Mix proportion of RHC
| Specimen | Mix proportion/(kg·m-3) | ||||||
|---|---|---|---|---|---|---|---|
| Cement | Silica fume | POM fiber | RCA | Sand | Water | Water reducer | |
| S0P0 | 400 | 0 | 0 | 1 073.8 | 746.2 | 160 | 2 |
| S0P0.3 | 400 | 0 | 4.23 | 1 073.8 | 746.2 | 160 | 2 |
| S0P0.6 | 400 | 0 | 8.46 | 1 073.8 | 746.2 | 160 | 2 |
| S0P0.9 | 400 | 0 | 12.69 | 1 073.8 | 746.2 | 160 | 2 |
| S5P0 | 380 | 20 | 0 | 1 073.8 | 746.2 | 160 | 2 |
| S5P0.3 | 380 | 20 | 4.23 | 1 073.8 | 746.2 | 160 | 2 |
| S5P0.6 | 380 | 20 | 8.46 | 1 073.8 | 746.2 | 160 | 2 |
| S5P0.9 | 380 | 20 | 12.69 | 1 073.8 | 746.2 | 160 | 2 |
| S10P0 | 360 | 40 | 0 | 1 073.8 | 746.2 | 160 | 2 |
| S10P0.3 | 360 | 40 | 4.23 | 1 073.8 | 746.2 | 160 | 2 |
| S10P0.6 | 360 | 40 | 8.46 | 1 073.8 | 746.2 | 160 | 2 |
| S10P0.9 | 360 | 40 | 12.69 | 1 073.8 | 746.2 | 160 | 2 |
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