硅灰对再生混凝土抗盐冻性能及微观结构的影响

王晨霞; 王金旭; 王宇飞; 梁卫国; 苏天; 曹芙波

doi:10.11988/ckyyb.20230063

PDF(5684 KB)

raybet体育在线院报 ›› 2024, Vol. 41 ›› Issue (6) : 171-177. DOI: 10.11988/ckyyb.20230063

水工结构与材料

硅灰对再生混凝土抗盐冻性能及微观结构的影响

王晨霞^1,2, 王金旭¹, 王宇飞³, 梁卫国⁴, 苏天⁵, 曹芙波^1,2

作者信息 +

Effect of Silica Fume on Salt Frost Resistance and Microstructure of Recycled Concrete

WANG Chen-xia^1,2, WANG Jin-xu¹, WANG Yu-fei³, LIANG Wei-guo⁴, SU Tian⁵, CAO Fu-bo^1,2

Author information +

文章历史 +

摘要

为研究硅灰对内蒙河套盐碱地区的再生混凝土微观结构和抗盐冻性能的影响,以硅灰掺量为变量对再生混凝土(RAC)进行了冻融循环试验、抗氯离子渗透试验和电镜扫描试验(SEM)。结果表明:通过SEM能看出球状硅灰颗粒可以使结构变得致密,RAC的质量损失率、立方体抗压强度损失率和氯离子迁移系数均随硅灰掺量的增加呈现先减后增的趋势,但硅灰掺量为10%和15%的RAC相对动弹性模量却相差不大;综合来看硅灰掺量为10%时抗盐冻性能最好,90次冻融循环后RC10组的质量损失率、立方体抗压强度损失率和氯离子迁移系数分别仅为RC0组的54.3%、50.3%和49.81%;同时建立了以硅灰掺量和冻融循环次数为参数的冻融损伤模型,并对内蒙盐碱地区的RAC进行了寿命预测。研究成果有助于推动再生混凝土的合理利用。

Abstract

To investigate the impact of silica fume on the microstructure and salt frost resistance of recycled concrete in the Hetao saline-alkali area of Inner Mongolia, we prepared recycled concrete (RAC) with varying silica fume content for cyclic salt freeze-thaw tests, chloride ion permeation resistance tests, and scanning electron microscopy (SEM) analysis. Our findings reveal that the microstructure of RAC becomes denser due to the influence of spherical silica fume particles. This leads to an initial decrease followed by an increase in the mass loss rate, cubic compressive strength loss rate, and chloride ion mobility coefficient of RAC with rising silica fume content. However, the relative dynamic elastic modulus of RAC with 10% and 15% silica fume content shows minimal disparity after salt-frost cycles. Overall, the optimal salt-frost resistance is achieved when silica fume content is at 10%. In the RC10 group, the mass loss rate, cube compressive strength loss rate, and chloride ion mobility coefficient are only 54.3%, 50.3%, and 49.81% of those of RC0 group respectively after 90 salt-frost cycles. Additionally, we developed a freeze-thaw damage model accounting for silica fume content and freeze-thaw cycle number to predict the service lifespan of RAC in saline-alkali regions of Inner Mongolia.

导出引用

王晨霞, 王金旭, 王宇飞, 梁卫国, 苏天, 曹芙波. 硅灰对再生混凝土抗盐冻性能及微观结构的影响[J]. raybet体育在线院报. 2024, 41(6): 171-177 https://doi.org/10.11988/ckyyb.20230063

WANG Chen-xia, WANG Jin-xu, WANG Yu-fei, LIANG Wei-guo, SU Tian, CAO Fu-bo. Effect of Silica Fume on Salt Frost Resistance and Microstructure of Recycled Concrete[J]. Journal of Changjiang River Scientific Research Institute. 2024, 41(6): 171-177 https://doi.org/10.11988/ckyyb.20230063

中图分类号： TU502

参考文献

[1] HUANG X, SU T, WANG J, et al. Bond Performance of Corroded Steel Reinforcement and Recycled Coarse Aggregate Concrete after Freeze-Thaw Cycles[J]. Sustainability, 2023, 15(7): 6122.
[2] WU J, JING X, WANG Z. Uni-axial Compressive Stress-strain Relation of Recycled Coarse Aggregate Concrete after Freezing and Thawing Cycles[J]. Construction and Building Materials, 2017, 134: 210-219.
[3] 鲍玖文, 于子浩, 张鹏, 等. 再生粗骨料混凝土及其构件抗冻性能研究进展[J]. 建筑结构学报, 2022, 43(4): 142-157. (BAO Jiu-wen, YU Zi-hao, ZHANG Peng, et al. Review on Frost Resistance Property of Recycled Coarse Aggregate Concrete and Its Structural Components[J]. Journal of Building Structures, 2022, 43(4): 142-157.(in Chinese))
[4] 王晨霞,郭磊,曹芙波.盐碱与冻融耦合作用下再生混凝土耐久性试验研究[J].硅酸盐通报,2018,37(1):10-16.(WANG Chen-xia,GUO Lei,CAO Fu-bo.Recycled Concrete Corrosion in Saline and Freeze-thaw Cycle Coupling under the Action of Durability Research[J].Bulletin of the Chinese Ceramic Society,2018,37(1):10-16.(in Chinese))
[5] 贾星亮. 钢纤维-玄武岩纤维再生混凝土力学性能与冻融腐蚀耦合研究[D]. 西安: 西京学院, 2021. (JIA Xing-liang. Study on Mechanical Properties and Freez-thaw Corrosion of Steel-basalt Hybridfiber Recycled Aggregate Concrete[D].Xi’an: Xijing University, 2021. (in Chinese))
[6] 李恒,郭庆军,王家滨,等.再生混凝土界面结构及耐久性综述[J].材料导报,2020,34(13):13050-13057.(LI Heng, GUO Qing-jun, WANG Jia-bin, et al. Meso-/Micro-structure of Interfacial Transition Zone and Durability of Recycled Aggregate Concrete: a Review[J]. Materials Reports, 2020, 34(13): 13050-13057.(in Chinese))
[7] 高嵩, 班顺莉, 郭嘉, 等. 硅灰对再生混凝土界面过渡区的影响[J]. 材料导报, 2023, 37(11): 97-103. (GAO Song, BAN Shun-li, GUO Jia, et al. Effect of Silica Fume on Interfacial Transition Zone of Recycled Concrete[J]. Materials Reports, 2023, 37(11): 97-103.(in Chinese))
[8] LU Z, FENG Z G, YAO D, et al. Freeze-thaw Resistance of Ultra-high Performance Concrete: Dependence on Concrete Composition[J]. Construction and Building Materials, 2021, 293,doi: 10.1016/j.conbuildmat.2021.123523.
[9] ZHAO R,YUAN Y,CHENG Z,et al.Freeze-thaw Resistance of Class F Fly Ash-based Geopolymer Concrete[J]. Construction and Building Materials,2019,222:474-483.
[10] 班顺莉. 矿物掺合料对再生混凝土界面过渡区微结构影响研究[D]. 青岛: 青岛理工大学, 2022. (BAN Shun-li. The Influence of Admixtures on Microstructure and Performance of Recycled Concrete Interface Transtion Zone[D].Qingdao: Qingdao Tehcnology University, 2022. (in Chinese))
[11] 赵飞,周志云,陈新星,等.再生粗骨料和矿物掺合料对再生混凝土抗冻性影响的研究[J].水资源与水工程学报,2015,26(4):183-186,191.(ZHAO Fei, ZHOU Zhi-yun, CHEN Xin-xing, et al. Study on Effect of Recycled Coarse Aggregate and Mineral Admixture on Frost Resistance of Recycled Concrete[J]. Journal of Water Resources and Water Engineering, 2015, 26(4): 183-186, 191.(in Chinese))
[12] 吴泽媚,陈东丰,高培伟,等.氯盐和冻融双重作用对混凝土抗盐冻性的影响[J].硅酸盐通报,2011,30(6):1244-1248.(WU Ze-mei, CHEN Dong-feng, GAO Pei-wei, et al. Effects of Chloride Salt and Freezing-thawing on Deicer-scaling Resistance of Concrete[J]. Bulletin of the Chinese Ceramic Society, 2011, 30(6): 1244-1248.(in Chinese))
[13] 李隽, 高培伟, 刘宏伟, 等. 盐冻对混凝土力学性能影响试验研究[J]. 混凝土, 2014(10): 8-11. (LI Jun, GAO Pei-wei, LIU Hong-wei, et al. Experimental Study on the Deicer-scaling Resistances to Mechanical Properties of Concrete[J]. Concrete, 2014(10): 8-11.(in Chinese))
[14] SASANIPOUR H,ASLANI F,TAHERINEZHAD J.Effect of Silica Fume on Durability of Self-compacting Concrete Made with Waste Recycled Concrete Aggregates[J]. Construction and Building Materials,2019,227,doi:10.1016/j.conbuildmat.2019.07.324.
[15] 刘普, 王明华, 李庆涛. 高温后路缘石再生骨料混凝土的力学性能[J]. 建筑材料学报, 2022, 25(12): 1233-1240. (LIU Pu, WANG Ming-hua, LI Qing-tao. Mechanical Properties of Curb Recycled Aggregate Concrete after High Temperature[J]. Journal of Building Materials, 2022, 25(12): 1233-1240.(in Chinese))
[16] 袁继峰,冷捷,段文峰,等.硅灰对再生混凝土性能影响的试验研究[J].吉林建筑大学学报,2017,34(1):31-35.(YUAN Ji-feng, LENG Jie, DUAN Wen-feng, et al. Experimental Study on Influence of Properties of Recycled Concrete by Silica Fuma[J]. Journal of Jilin Jianzhu University, 2017, 34(1): 31-35.(in Chinese))
[17] 侯泽宇. 部分浸泡复合盐侵蚀再生混凝土耐久性退化规律与机理研究[D]. 西安: 西安工业大学, 2022. (HOU Ze-yu. Study on Durability Deterioration Law and Mechanism of Partially Immersed Recycled Aggregate Concrete Subjected with Composite Salt[D].Xi’an: Xi’an Technological University, 2022. (in Chinese))
[18] LIU Y,CHEN Y F,WANG W,et al. Bond Performance of Thermal Insulation Concrete under Freeze-Thaw Cycles[J].Construction and Building Materials,2016,104:116-125.
[19] 王晨霞,刘路,曹芙波,等.冻融循环后再生混凝土力学性能试验研究[J].建筑结构学报,2020,41(12):193-202.(WANG Chen-xia, LIU Lu, CAO Fu-bo, et al. Experimental Study on Mechanical Properties of Recycled Concrete after Freeze-thaw Cycles[J]. Journal of Building Structures, 2020, 41(12): 193-202.(in Chinese))
[20] 刘崇熙,汪在芹.坝工混凝土耐久寿命的衰变规律[J].raybet体育在线院报,2000,17(2):18-21.(LIU Chong-xi, WANG Zai-qin. On Decay Rules of Durable Life of Dam Concrete[J]. Journal of Yangtze River Scientific Research Institute, 2000, 17(2): 18-21.(in Chinese))
[21] 刘路. 盐冻循环作用下再生混凝土力学性能与微观结构研究[D]. 包头: 内蒙古科技大学, 2020. (LIU Lu. Study on Mechanical Properties Concrete and Microstructure of Recycled under Salt-freeze Cycle[D].Baotou: Inner Mongolia University of Science & Technology, 2020. (in Chinese))
[22] 李金玉, 邓正刚, 曹建国, 等. 混凝土抗冻性的定量化设计[C] //中国土木工程学会.第五届全国混凝土耐久性学术交流会论文集. 北京: 中国土木工程学会,2000: 39-49. (LI Jin-yu, DENG Zheng-gang, CAO Jian-guo, et al. Quantitative Design of Frost Resistance of Concrete[C] //China Civil Engineering Society.Proceedings of the Fifth National Concrete Durability Academic Exchange Conference of China Civil Engineering Society. Beijing: China Civil Engineering Society, 2000: 39-49. (in Chinese))