理论与试验研究

毛细浸润条件下固化淤泥的干湿耐久性

  • 何俊 ,
  • 朱元军 ,
  • 龙思昊 ,
  • 罗时茹 ,
  • 李文静
展开
  • 湖北工业大学 土木建筑与环境学院,武汉 430068
何俊(1977—),女,湖北钟祥人,博士,教授,主要从事环境岩土工程方向的研究。E-mail:hjunas@163.com

收稿日期: 2024-12-26

  网络出版日期: 2025-10-17

基金资助

国家自然科学基金 (41772332)

Dry-Wet Durability of Solidified Sludge under Capillary Immersion Mode

  • He Jun ,
  • Zhu Yuanjun ,
  • Long Sihao ,
  • Luo Shiru ,
  • Li Wenjing
Expand
  • School of Civil Engineering, Architectural and Environment, Hubei University of Technology, Wuhan 430068, P.R. China

Received date: 2024-12-26

  Online published: 2025-10-17

摘要

分别以碱渣-矿渣-电石渣和水泥为淤泥固化剂,开展毛细浸润与全浸没方式下固化淤泥的干湿循环耐久性试验,探讨海水侵蚀环境下不同浸润方式对固化淤泥耐久性的影响规律和机理。结果表明:当水泥与矿渣掺量相同时,碱渣-矿渣-电石渣固化淤泥干湿耐久性优于水泥固化淤泥;全浸没试样外观破损严重、质量损失率大,无侧限抗压强度小;但当固化剂掺量增大、干湿循环次数增多时,毛细浸润试样强度低于全浸没试样;毛细浸润时海水中侵蚀性离子随毛细水上升,引起盐结晶并生成碳硫硅钙石等物质,多次干湿循环使试样上下和内外不均匀性增强、损伤加深,导致毛细浸润对固化淤泥干湿循环耐久性的不利影响超过全浸没,地下水位界面以上成为固化土最薄弱区域。

本文引用格式

何俊 , 朱元军 , 龙思昊 , 罗时茹 , 李文静 . 毛细浸润条件下固化淤泥的干湿耐久性[J]. 地下空间与工程学报, 2025 , 21(5) : 1576 -1584 . DOI: 10.20174/j.JUSE.2025.05.11

Abstract

Using soda residue (SR)-ground granulated blast furnace slag (GGBS)-carbide slag (CS) and cement as solidifiers of sludge, the dry-wet durability of solidified sludge under capillary immersion and full immersion in seawater are conducted, and the influence laws and mechanisms of different immersion methods on the durability of solidified silt under seawater erosion environment are investigated. The results show that: SR-GGBS-CS solidified sludge shows better dry-wet durability than cement solidified sludge when cement dosage equals GGBS dosage. Generally, the samples in full immersion mode are damage severely, and show a high mass loss rate and low unconfined compressive strength. However, the strength of the sample in capillary immersion mode is lower than that in full immersion mode when the solidifier dosage and dry-wet cycles increase. The corrosive ions rising with the capillary water cause salt crystallization and the formation of Thaumasite, which deepens the inhomogeneity and damage for the samples under the coupling effects of multiple dry-wet cycles and seawater. Therefore, the adverse effect of capillary immersion on the dry-wet durability of solidified sludge gradually exceeds that of full immersion, and the zone above groundwater is the weakest.

参考文献

[1] American Society for Testing and Material. Standard test method for wetting and drying test of solid wastes (ASTM D4843-88(2024)) [S]. ASTM International, West Conshohocken, PA, USA, 2024.
[2] American Society for Testing and Material. Standard test methods for wetting and drying compacted soil-cement mixture (ASTM D559/D559M-15) [S]. ASTM International, West Conshohocken, PA, USA, 2015.
[3] 中华人民共和国交通运输部. 公路工程水泥及水泥混凝土试验规程(JTG3420-2020)[S]. 北京: 人民交通出版社, 2021. (Ministry of Transport of the People's Republic of China. Test Procedures for Cement and Cement Concrete for Highway Engineering: JTG3420-2020[S]. Beijing: China Communications Press, 2021. (in Chinese))
[4] Zhang X C, Fang X W, Liu J D, et al. Durability of solidified sludge with composite rapid soil stabilizer under wetting-drying cycles[J]. Case Studies in Construction Materials, 2022, 17: e01374.
[5] Kamei T, Ahmeda A, Ugai K. Durability of soft clay soil stabilized with recycled Bassanite and furnace cement mixtures[J]. Soils and Foundations, 2013, 53(1): 155-165.
[6] Du Y J, Bo Y L, Jin F, et al. Durability of reactive magnesia-activated slag-stabilized low plasticity clay subjected to drying-wetting cycle[J]. European Journal of Environmental and Civil Engineering, 2016, 20(2): 215-230.
[7] Helson O, Eslami J, Beaucour A, et al. Durability of soil mix material subjected to wetting/drying cycles and external sulfate attacks[J]. Construction and Building Materials, 2018, 192: 416-428.
[8] He J, Shi X, Li Z, et al. Strength properties of dredged soil at high water content treated with soda residue, carbide slag, and ground granulated blast furnace slag[J]. Construction and Building Materials, 2020, 242: 118126.
[9] Ngo T P, Bui Q B, Phan V T A, et al. Durability of geopolymer stabilised compacted earth exposed to wetting-drying cycles at different conditions ofpH and salt[J]. Construction and Building Materials, 2022, 329: 127168.
[10] Mardani-Aghabaglou A, Tuyan M, Ramyar K. Mechanical and durability performance of concrete incorporating fine recycled concrete and glass aggregates[J]. Materials and Structures, 2015, 48: 2629-2640.
[11] 梁仕华, 曾伟华. 干湿循环条件下水泥粉煤灰固化南沙淤泥土试验研究[J]. 工业建筑, 2018, 48(7): 83-86,43. (Liang Shihua, ZengW eihua. Experimental study of Nansha silt soil reinforced with cement and fly-ash during wetting-drying cycles[J]. Industrial Architecture, 2018, 48(7): 83-86,43. (in Chinese))
[12] 张经双, 段雪雷, 吴倩云, 等. 氯盐-干湿循环耦合作用下水泥土的力学性能[J]. 建筑材料学报, 2021, 24(3): 508-515. (Zhang Jingshuang, Duan Xuelei, Wu Qianyun, et al. Mechanical properties of cement soil subject to coupling effect of chloride salt solution and dry-wet cycles[J]. Journal of Building Materials, 2021, 24(3): 508-515. (in Chinese))
[13] 徐丽娜, 邓皓允, 牛雷, 等. 盐干-湿循环作用下低温养护纤维水泥土的力学性能试验研究[J]. 土木与环境工程学报(中英文), 2022, 44(1): 10-19. (Xu Lina, Deng Haoyun, Niu Lei, et al. Experimental study on mechanical properties of fiber-reinforced cemented soil with the low temperature curing condition subjected to effect of salt and drying wetting cycles[J]. Journal of Civil and Environmental Engineering (Chinese and English), 2022, 44(1): 10-19. (in Chinese))
[14] He J, Li Z X, Wang X Q, et al. Durability of soft soil treated with soda residue and ground granulated blast furnace slag in a soaking environment[J]. Journal of Materials in Civil Engineering, 2020, 32(3): 06019018.
[15] Yu Y, Pu J, Ugai K. A damage model for soil-cement mixture[J]. Soils and foundations, 1998, 38(3): 1-12.
[16] Chen H, Chen Z F, Zheng C F, et al. Damage evolution process of cement-stabilized soil based on deformation and microstructure analysis[J]. Marine Georesources and Geotechnology, 2018, 36(1): 64-71.
[17] Geng K Q, Chai J R, Qin Y, et al. Damage evolution, brittleness and solidification mechanism of cement soil and alkali-activated slag soil[J]. Journal of Materials Research and Technology, 2023, 25: 6039-6060.
[18] 陈鑫, 张泽, 李东庆, 等. 软弱夹层对水泥土单轴压缩影响研究[J]. 岩石力学与工程学报, 2020, 39(2): 398-412. (Chen Xin, Zhang Ze, Li Dongqing, et al. Study on the influence of weak interlayer on uniaxial compression behaviors of cement soils[J]. Chinese Journal of Rock Mechanics and Engineering, 2020, 39(2): 398-412. (in Chinese))
[19] 李新平, 路亚妮, 王仰君. 冻融荷载耦合作用下单裂隙岩体损伤模型研究[J]. 岩石力学与工程学报, 2013, 32(11): 2307-2315. (Li Xinping, Lu Yani, Wang Yangjun. Research on damage model of single jointed rock masses under coupling action of freeze-thaw and loading[J]. Chinese Journal of Rock Mechanics and Engineering, 2013, 32(11): 2307-2315. (in Chinese))
[20] Talero R, Trusilewicz L, Delgado A, et al. Comparative and semi-quantitative XRD analysis of Friedel's salt originating from pozzolan and Portland cement[J]. Construction and Building Materials, 2011, 25(5): 2370-2380.
[21] 吴萌, 张云升, 刘志勇, 等. 水泥基材料碳硫硅钙石型硫酸盐侵蚀的研究进展[J]. 硅酸盐学报, 2022, 50(8): 2270-2283. (Wu Meng, Zhang Yunsheng, Liu Zhiyong, et al. Research Progress on Thaumasite Sulfate Attack of Cement-based Materials[J]. Journal of the Chinese Ceramic Society, 2022, 50(8): 2270-2283. (in Chinese))
[22] 何俊, 罗时茹, 龙思昊, 等. 不同吸水环境下碱渣固化淤泥毛细吸水和强度性质[J]. 材料导报, 2024, 38(9): 22100254. (He Jun, Luo Shiru, Long Sihao, et al. Capillary water absorption and strength of soft soil solidified with sodaresidue under different water environments[J]. Materials Reports, 2024, 38(9): 22100254. (in Chinese))
[23] 张虎元, 严耿升, 赵天宇, 等. 土建筑遗址干湿耐久性研究[J]. 岩土力学, 2011, 32(2): 347-355. (Zhang Huyuan, Yan Gengsheng, Zhao Tianyu, et al. Durability of earthen architecture ruins under cyclic wetting and drying[J]. Rock and Soil Mechanics, 2011, 32(2): 347-355. (in Chinese))
文章导航

/