矿化煤矸石混凝土抗硫酸盐侵蚀性能

潘铖; 郑志明; 杨逾

doi:10.11988/ckyyb.20230126

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raybet体育在线院报 ›› 2024, Vol. 41 ›› Issue (7) : 168-174. DOI: 10.11988/ckyyb.20230126

水工结构与材料

矿化煤矸石混凝土抗硫酸盐侵蚀性能

潘铖¹, 郑志明², 杨逾²

作者信息 +

Sulfate Corrosion Resistance of Microbial Mineralized Coal Gangue Concrete

PAN Cheng¹ , ZHENG Zhi-ming² , YANG Yu²

Author information +

文章历史 +

摘要

为研究微生物菌液浓度、尿素浓度、钙离子浓度、煤矸石取代率对矿化煤矸石混凝土抗硫酸盐侵蚀性能的影响,开展4因素3水平正交试验。结果表明:微生物矿化技术可显著提升煤矸石混凝土力学性能,煤矸石混凝土强度影响排序为煤矸石取代率＞菌液浓度＞钙离子浓度＞尿素浓度,微生物矿化煤矸石混凝土力学性能和抗硫酸盐侵蚀性能的最优配比为:菌液浓度4×10⁸ cells/mL、尿素浓度0.9 mol/L、钙离子浓度0.2 mol/L、煤矸石取代率30%;硫酸盐与水化产物反应生成钙矾石是硫酸盐干湿循环前期质量和抗压强度提升的主要原因,也是后期表观形态盐化、体积膨胀、鼓包掉落、强度降低的主要原因。研究成果可为微生物矿化煤矸石混凝土力学和耐久性提供试验依据。

Abstract

Orthogonal tests with four factors at three levels were conducted to investigate the sulfate corrosion resistance of concrete under varying microbial concentration, urea concentration, calcium ion concentration, and coal gangue replacement rate. Subsequently, mechanical testing and sulfate resistance dry-wet cycle experiments were performed on coal gangue concrete specimens. The findings demonstrate that microbial mineralization technology markedly enhances the mechanical properties of coal gangue concrete. Coal gangue replacement rate exerts the largest influence on the strength of coal gangue concrete, followed by bacterial solution concentration, calcium ion concentration, and urea concentration in descending order. Optimal ratios for mechanical properties and sulfate corrosion resistance of microbial mineralized coal gangue concrete are as follows: bacterial solution concentration of 4×10⁸ cells/mL, urea concentration of 0.9 mol/L, calcium ion concentration of 0.2 mol/L, and a coal gangue replacement rate of 30%. The formation of ettringite through sulfate reaction with hydration products primarily accounts for early-stage quality improvement and compressive strength enhancement during dry-wet cycles, and also contributes to later-stage apparent salinization, volume expansion, bulge drop, and strength reduction. This study serves as an experimental foundation for understanding the mechanics and durability of microbial mineralized coal gangue concrete.

导出引用

潘铖, 郑志明, 杨逾. 矿化煤矸石混凝土抗硫酸盐侵蚀性能[J]. raybet体育在线院报. 2024, 41(7): 168-174 https://doi.org/10.11988/ckyyb.20230126

PAN Cheng , ZHENG Zhi-ming , YANG Yu. Sulfate Corrosion Resistance of Microbial Mineralized Coal Gangue Concrete[J]. Journal of Changjiang River Scientific Research Institute. 2024, 41(7): 168-174 https://doi.org/10.11988/ckyyb.20230126

中图分类号： TU528

参考文献

[1] 刘方, 蒋伟, 傅少君, 等. 水工混凝土饱水过程水分分布及冻融劣化对比[J]. raybet体育在线院报, 2023, 40(7): 152-157. (LIU Fang, JIANG Wei, FU Shao-jun, et al. Moisture Distribution during Water Saturation and Freeze-thaw Deterioration of Hydraulic Concrete[J]. Journal of Changjiang River Scientific Research Institute, 2023, 40(7): 152-157.(in Chinese))
[2] 秦楠,李琼,徐博.聚甲醛纤维高强混凝土孔隙特征及动态力学特性[J].raybet体育在线院报,2023,40(6):180-186.(QIN Nan, LI Qiong, XU Bo. Pore Characteristics and Dynamic Mechanical Properties of Polyoxymethylene Fiber-reinforced High-strength Concrete[J]. Journal of Changjiang River Scientific Research Institute, 2023, 40(6): 180-186.(in Chinese))
[3] 杨科,陶铁军,黄柯宇,等.基于模糊数学的混凝土表观质量综合评价[J].raybet体育在线院报,2023,40(6):187-194.(YANG Ke,TAO Tie-jun, HUANG Ke-yu, et al. Comprehensively Assessing the Appearance Quality of Concrete Based on Fuzzy Mathematics[J]. Journal of Changjiang River Scientific Research Institute, 2023, 40(6): 187-194.(in Chinese))
[4] 张岩,刘嘉昊,吕园,等.不同石粉参数对混凝土力学性能的影响[J].raybet体育在线院报,2023,40(3):166-173.(ZHANG Yan, LIU Jia-hao, L Yuan, et al. Influence of Stone Powder Parameters on Mechanical Properties of Concrete[J]. Journal of Changjiang River Scientific Research Institute, 2023, 40(3): 166-173.(in Chinese))
[5] 杨栩, 陈松, 蒋俊, 等. 煤矸石对霞石尾矿陶粒孔结构及性能的影响[J]. 非金属矿, 2022, 45(4): 102-106. (YANG Xu, CHEN Song, JIANG Jun, et al. Effect of Coal Gangue on the Pore Structure and Properties of Nepheline Tailing Ceramsite[J]. Non-Metallic Mines, 2022, 45(4): 102-106.(in Chinese))
[6] 何龙,张雁,朱红星,等.煤矸石改性膨胀土干湿循环下缩裂的调控机制[J].非金属矿,2022,45(4):42-44,48.(HE Long, ZHANG Yan, ZHU Hong-xing, et al. Control Mechanism of Shrinkage Cracking of Expansive Soil Modified by Coal Gangue under Wetting and Drying Cycles[J]. Non-Metallic Mines, 2022, 45(4): 42-44, 48.(in Chinese))
[7] 毛明杰, 黄博文, 陈浩旭, 等. 未燃煤矸石粗骨料混凝土高温后的损伤研究[J]. 建筑结构, 2022, 52(增刊1): 1566-1570. (MAO Ming-jie, HUANG Bo-wen, CHEN Hao-xu, et al. Study on Damage of Unburned Coal Gangue Coarse Aggregate Concrete after High Temperature[J]. Building Structure, 2022, 52(Supp.1): 1566-1570.(in Chinese))
[8] 杜青铉, 张宇航, 孙伟豪, 等. 基于混合模型的煤矸石透水混凝土透水系数预测[J]. 材料导报, 2022, 36(增刊1): 319-323. (DU Qing-xuan, ZHANG Yu-hang, SUN Wei-hao, et al. Prediction of Permeability Coefficient of Coal Gangue Permeable Concrete Based on Mixed Model[J]. Materials Reports, 2022, 36(Supp.1): 319-323.(in Chinese))
[9] 邱继生,程坤,张如意,等.质量分数对煤矸石基绿色充填体性能影响研究[J].非金属矿,2022,45(3):22-26.(QIU Ji-sheng, CHENG Kun, ZHANG Ru-yi, et al. Study on the Effect of Mass Fraction on the Properties of Coal Gangue-based Green Filling Body[J]. Non-Metallic Mines, 2022, 45(3): 22-26.(in Chinese))
[10]罗秀云,张雁,朱红星.干湿循环下煤矸石改良膨胀土表面特性研究[J].非金属矿,2022,45(1):31-33,36.(LUO Xiu-yun, ZHANG Yan, ZHU Hong-xing. Study on Surface Characteristics of Expansive Soil Ameliorated by Coal Gangue under Dry-Wetting Cycle[J]. Non-Metallic Mines, 2022, 45(1): 31-33, 36.(in Chinese))
[11]朱红光, 霍青杰, 倪亚东, 等. 煤矸石细集料-矿渣混凝土抗压强度与抗冻性能研究[J]. 材料导报, 2021, 35(22): 22085-22091. (ZHU Hong-guang, HUO Qing-jie, NI Ya-dong, et al. Study on Compressive Strength and Frost Resistance of Coal Gangue Fine Aggregate-slag Cement-based Concrete[J]. Materials Reports, 2021, 35(22): 22085-22091.(in Chinese))
[12]葛洁雅, 朱红光, 李宗徽, 等. 煤矸石粗骨料-地聚物混凝土的力学与耐久性能研究[J]. 材料导报, 2021, 35(增刊2): 218-223. (GE Jie-ya, ZHU Hong-guang, LI Zong-hui, et al. Study on Mechanics and Durability of Coal Gangue Coarse Aggregate-geopolymer Concrete[J]. Materials Reports, 2021, 35(Supp.2): 218-223.(in Chinese))
[13]马立纲,乔金丽,孙永涛,等.隧道二衬微膨胀注浆料试验研究及性能分析[J].raybet体育在线院报,2023,40(7):158-166,171.(MA Li-gang,QIAO Jin-li,SUN Yong-tao,et al.Mix Proportion Design and Properties Analysis of Micro-expansion Grouting Material for Secondary Lining of Tunnel[J]. Journal of Changjiang River Scientific Research Institute,2023,40(7):158-166,171.(in Chinese))
[14]姚泽良,崔婷婷,党发宁,等.基于ABAQUS的再生混凝土塑性损伤性能[J].raybet体育在线院报,2022,39(9):131-136,143.(YAO Ze-liang, CUI Ting-ting, DANG Fa-ning, et al. Plastic Damage Performance of Recycled Concrete Based on ABAQUS[J]. Journal of Yangtze River Scientific Research Institute, 2022, 39(9): 131-136, 143.(in Chinese))
[15]冯忠居, 陈露, 孔元元, 等. 青海盐沼泽环境下混凝土现场腐蚀试验[J]. raybet体育在线院报, 2023, 40(5): 166-172. (FENG Zhong-ju, CHEN Lu, KONG Yuan-yuan, et al. Field Corrosion Test of Concrete in Salt Swamp Environment in Qinghai[J]. Journal of Changjiang River Scientific Research Institute, 2023, 40(5): 166-172.(in Chinese))
[16]诸裕良, 林明泽, 陈磊, 等. 含泥量及成型工艺对疏浚砂水泥基材料力学性能和耐久性的影响[J]. raybet体育在线院报, 2023, 40(2): 131-135. (ZHU Yu-liang, LIN Ming-ze, CHEN Lei, et al. Influences of Mud Content and Molding Techniques on Mechanical Properties and Durability of Cement-based Materials Prepared with Dredged Sand[J]. Journal of Changjiang River Scientific Research Institute, 2023, 40(2): 131-135.(in Chinese))