硅酸盐通报 ›› 2026, Vol. 45 ›› Issue (6): 2063-2074.DOI: 10.16552/j.cnki.issn1001-1625.2025.1151
何彦辉1,2(
), 王欢3, 邹勇4, 陈诚4, 许芃3, 何智浩3,5,6(
)
收稿日期:2025-11-18
修订日期:2025-12-13
出版日期:2026-06-15
发布日期:2026-07-14
通信作者:
何智浩,博士,副教授。E-mail:zzzzhangjj@163.com作者简介:何彦辉(1981—),男,高级工程师。主要从事交通工程施工技术及管理、安全与应急救援方面的研究。E-mail:18080584376@163.com
基金资助:
HE Yanhui1,2(
), WANG Huan3, ZOU Yong4, CHEN Cheng4, XU Peng3, HE Zhihao3,5,6(
)
Received:2025-11-18
Revised:2025-12-13
Published:2026-06-15
Online:2026-07-14
摘要:
在“双碳”目标背景下,水泥工业的高能耗和高排放问题亟待解决,建筑固废的资源化利用成为低碳建材发展的重要途径。本研究采用普通硅酸盐水泥为基体,通过加速碳化处理制得回收水泥混凝土粉末(RCCP)和碳化回收水泥混凝土粉末(碳化RCCP),并分别以0%、20%、40%、60%(质量分数)替代水泥,制备泡沫混凝土。通过流动性、干密度、吸水率、抗压强度、XRD、TG-DSC、SEM、MicroCT及导热系数测试,分析了碳化RCCP对泡沫混凝土工作性、显微结构及热学性能的影响。结果表明:随着RCCP替代率增加,浆体流动性下降,当替代率为60%时,碳化与未碳化试样的流动度分别较基准样下降约8.0%与11.0%;随着碳化RCCP替代率增加,试样抗压强度先增大后减小,当替代率为20%时,28 d抗压强度达到峰值,比RCCP试样提高6.3%;随着RCCP替代率增加,孔隙率增大,导热性能有所改善,当碳化RCCP替代率为60%时,导热系数较RCCP试样降低6.8%。
中图分类号:
何彦辉, 王欢, 邹勇, 陈诚, 许芃, 何智浩. 碳化回收水泥混凝土粉末对泡沫混凝土性能的影响[J]. 硅酸盐通报, 2026, 45(6): 2063-2074.
HE Yanhui, WANG Huan, ZOU Yong, CHEN Cheng, XU Peng, HE Zhihao. Influence of Carbonized Recycled Cement Concrete Powder on Performance of Foamed Concrete[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2026, 45(6): 2063-2074.
| Raw material | Mass fraction/% | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| CaO | SiO2 | MgO | Al2O3 | Fe2O3 | K2O | Na2O | SO3 | LOI | |
| Cement | 50.10 | 26.50 | 4.30 | 8.00 | 3.30 | 0.85 | 0.55 | 2.95 | 3.40 |
| RCCP | 31.80 | 20.10 | 8.90 | 4.90 | 1.30 | 0.75 | 0.70 | 0.65 | 30.90 |
| Attapulgite | 1.90 | 47.90 | 9.10 | 9.30 | 4.50 | 0.95 | 5.80 | — | 19.30 |
表1 原材料的主要化学组成
Table 1 Main chemical composition of raw materials
| Raw material | Mass fraction/% | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| CaO | SiO2 | MgO | Al2O3 | Fe2O3 | K2O | Na2O | SO3 | LOI | |
| Cement | 50.10 | 26.50 | 4.30 | 8.00 | 3.30 | 0.85 | 0.55 | 2.95 | 3.40 |
| RCCP | 31.80 | 20.10 | 8.90 | 4.90 | 1.30 | 0.75 | 0.70 | 0.65 | 30.90 |
| Attapulgite | 1.90 | 47.90 | 9.10 | 9.30 | 4.50 | 0.95 | 5.80 | — | 19.30 |
| Sample | Mix proportion/(kg·m-3) | SP content/% | W/B | |||||
|---|---|---|---|---|---|---|---|---|
| Cement | Attapulgite | RCCP | Carbonated RCCP | Water | Foam | |||
| Ref | 450 | 90 | 0 | 0 | 324 | 15 | 0.8 | 0.6 |
| R20 | 360 | 90 | 90 | 0 | 324 | 16 | 0.8 | 0.6 |
| R40 | 270 | 90 | 180 | 0 | 324 | 18 | 0.8 | 0.6 |
| R60 | 180 | 90 | 270 | 0 | 324 | 20 | 0.8 | 0.6 |
| C20 | 360 | 90 | 0 | 90 | 324 | 16 | 0.8 | 0.6 |
| C40 | 270 | 90 | 0 | 180 | 324 | 18 | 0.8 | 0.6 |
| C60 | 180 | 90 | 0 | 270 | 324 | 20 | 0.8 | 0.6 |
表2 泡沫混凝土配合比设计
Table 2 Mix proportion design of foamed concrete
| Sample | Mix proportion/(kg·m-3) | SP content/% | W/B | |||||
|---|---|---|---|---|---|---|---|---|
| Cement | Attapulgite | RCCP | Carbonated RCCP | Water | Foam | |||
| Ref | 450 | 90 | 0 | 0 | 324 | 15 | 0.8 | 0.6 |
| R20 | 360 | 90 | 90 | 0 | 324 | 16 | 0.8 | 0.6 |
| R40 | 270 | 90 | 180 | 0 | 324 | 18 | 0.8 | 0.6 |
| R60 | 180 | 90 | 270 | 0 | 324 | 20 | 0.8 | 0.6 |
| C20 | 360 | 90 | 0 | 90 | 324 | 16 | 0.8 | 0.6 |
| C40 | 270 | 90 | 0 | 180 | 324 | 18 | 0.8 | 0.6 |
| C60 | 180 | 90 | 0 | 270 | 324 | 20 | 0.8 | 0.6 |
| Sample | Average diameter /µm | Porosity/% | Correlation coefficient |
|---|---|---|---|
| Ref | 53.49 | 41.32 | 0.96 |
| C60 | 82.73 | 52.48 | 0.92 |
| R60 | 89.64 | 56.69 | 0.97 |
表3 FC的孔隙结构特征
Table3 Pore structure characterization of FC
| Sample | Average diameter /µm | Porosity/% | Correlation coefficient |
|---|---|---|---|
| Ref | 53.49 | 41.32 | 0.96 |
| C60 | 82.73 | 52.48 | 0.92 |
| R60 | 89.64 | 56.69 | 0.97 |
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