Experimental study on erosion resistance of site soil strengthened by EICP combined with sodium alginate
Liu Xiaojun1,2, Sun Yue1,2, Wang Dongya1,2, Fang Chenzhi1,2
1.School of Civil Engineering, Xi’an University of Architecture and Technology, Xi’an 710055, China 2.Key Laboratory of Geotechnical and Underground Space Engineering of Shaanxi Province, Xi’an University of Architecture and Technology, Xi’an 710055, China
Abstract:For the earthen heritage sites in Northwest China, their structural stability and historical authenticity preservation have faced severe challenges due to natural factors such as concentrated rainfall erosion and wind erosion. Traditional protective materials have certain limitations in resisting the erosions of wind-sand and rainfall. Hence, it was proposed that the spray of Sodium Alginate (SA) combined with enzyme-induced calcite precipitation (EICP) technology can be used to reinforce the surface layer of the site; the mechanism of the reinforcement system was systematically explored through a series of laboratory strengthening tests, along with the macroscopic mechanical tests, disintegration tests, wind erosion tests and scanning electron microscopy tests. The results showed that: ① The strength of SA-EICP reinforced specimens increased first and then decreased with the increase of sodium alginate concentration, and reached the maximum value of 2 834 kPa at a concentration of 3 g/L, which was 166% higher than that of the unreinforced specimens. ② The maximum calcium carbonate content in SA-EICP reinforced specimens was 12.81%, and SA provided nucleation sites for calcium carbonate precipitation. ③ Disintegration tests revealed that unreinforced specimens rapidly disintegrated in water with the disintegration coefficient of 99%, whereas SA-EICP reinforced specimens didn’t disintegrate basically and the disintegration coefficient even exhibited negative behavior in growth. ④ Wind erosion tests indicated that on the SA-EICP reinforced specimen, a dense surface crust layer, which effectively prevents particle detachment and crack propagation, was formed, enhancing wind erosion resistance of specimens.
刘小军, 孙跃, 王东亚, 方谌志. EICP联合海藻酸钠强化遗址土抗侵蚀能力试验研究[J]. 土木工程学报, 2026, 59(11): 128-138.
Liu Xiaojun, Sun Yue, Wang Dongya, Fang Chenzhi. Experimental study on erosion resistance of site soil strengthened by EICP combined with sodium alginate. 土木工程学报, 2026, 59(11): 128-138.
1 郭青林. 干旱环境下土遗址保护成套技术集成与效果评价研究[M]. 北京: 科学出版社, 2021. 2 RICHARDS J, VILES H, GUO Q L. The importance of wind as a driver of earthen heritage deterioration in dryland environments[J]. Geomorphology, 2020, 369: 107363. 3 崔凯, 谌文武, 张景科, 等. 干旱区古代建材夯土特征及劣化机理研究[J]. 四川大学学报: 工程科学版, 2012(6): 47-54. CUI Kai, CHEN Wenwu, ZHANG Jingke, et al. Study on mechanism of degradation and feature of ancient building materials-rammed earth in arid region[J]. Journal of Sichuan University: Engineering Science Edition, 2012(6): 47-54. (in Chinese) 4 和法国, 吕燃, 粟华忠, 等. SH材料加固夯筑遗址土耐久性试验及机理研究[J]. 岩土力学, 2019, 40(增1): 297-307. HE Faguo, Lü Ran, SU Huazhong, et al. Durability test and reinforced mechanism on adding SH materials into soil of archaeological sites[J]. Rock and Soil Mechanics, 2019, 40(S1): 297-307. (in Chinese) 5 谌文武, 张起勇, 刘宏伟. SH固土剂在遗址土中的渗透注浆扩散规律[J]. 岩土力学, 2019, 40(2): 429-435, 444. CHEN Wenwu, ZHANG Qiyong, LIU Hongwei. Infiltration grouting diffusion law of SH agent in earthen sites[J]. Rock and Soil Mechanics, 2019, 40(2): 429-435, 444. (in Chinese) 6 和法国, 周瑾, 张景科. PS材料加固遗址土强度与微结构参数相关性研究[J]. 兰州大学学报: 自然科学版, 2018, 54(1): 15-19. HE Faguo, ZHOU Jin, ZHANG Jingke. Correlation analysis of microstructure indices and strength of solidified site soil with PS material[J]. Journal of Lanzhou University: Natural Sciences, 2018, 54(1): 15-19. (in Chinese) 7 郭青林, 李平, 张博, 等. 微纳米Ca(OH)2加固遗址土室内试验研究[J]. 岩土力学, 2023, 44(8): 2221-2228. GUO Qinglin, LI Ping, ZHANG Bo, et al. Laboratory test of micro-nano Ca(OH)2 reinforced earthen sites[J]. Rock and Soil Mechanics, 2023, 44(8): 2221-2228. (in Chinese) 8 BORSOI G, LUBELLI B, VAN HEES R, et al. Evaluation of the effectiveness and compatibility of nanolime consolidants with improved properties[J]. Construction and Building Materials, 2017, 142: 385-394. 9 GIORGI R, DEI L, BAGLIONI P. A new method for consolidating wall paintings based on dispersions of lime in alcohol[J]. Studies in Conservation,2000,45(3):146-161. 10 文鑫, 王南, 张景科, 等. 烧料礓石-遗址土注浆浆液工作性能[J]. 兰州大学学报: 自然科学版, 2023, 59(5): 664-670, 680. WEN Xin, WANG Nan, ZHANG Jingke, et al. The working performance of fissure grouting slurry composed of calcined ginger nuts and earthen site’s soil[J]. Journal of Lanzhou University: Natural Sciences, 2023, 59(5): 664-670, 680. (in Chinese) 11 赵林毅, 李志鹏, 李燕飞, 等. 超细烧料礓石改性多福寺遗址土空鼓灌浆材料的性能测试及现场应用[J]. 西北师范大学学报: 自然科学版, 2024, 60(5): 1-9, 44. ZHAO Linyi, LI Zhipeng, LI Yanfei, et al. Performance test and field application of ultrafine calcined ginger nut modified earthen sites of Duofu Temple as an empty drum grouting materials of mural[J]. Journal of Northwest Normal University: Natural Science, 2024, 60(5): 1-9, 44. (in Chinese) 12 李驰, 史冠宇, 武慧敏, 等. 基于脲酶诱导碳酸钙沉积的微生物矿化技术在分散性土改良中应用的试验研究[J]. 岩土力学, 2021, 42(2): 333-342. LI Chi, SHI Guanyu, WU Huimin, et al. Experimental study on bio-mineralization for dispersed soil improvement based on enzyme induced calcite precipitate technology[J]. Rock and Soil Mechanics, 2021, 42(2): 333-342. (in Chinese) 13 CHANDRA A, RAVI K. Application of enzyme-induced carbonate precipitation (EICP) to improve the shear strength of different type of soils[M]//Problematic Soils and Geoenvironmental Concerns. Singapore: Springer Singapore, 2020: 617-632. 14 原鹏博, 朱磊, 钟秀梅, 等. 酶诱导碳酸钙沉淀加固遗址土动力特性试验研究[J]. 岩土力学, 2022, 43(12): 3385-3392, 3415. YUAN Pengbo, ZHU Lei, ZHONG Xiumei, et al. Experimental investigation on the dynamic characteristics of earthen site soil treated by enzyme-induced calcium carbonate precipitation[J]. Rock and Soil Mechanics, 2022, 43(12): 3385-3392, 3415. (in Chinese) 15 张建伟, 韩一, 边汉亮, 等. 大豆脲酶诱导碳酸钙固化粉土抗风侵蚀性能的试验研究[J]. 工业建筑, 2020, 50(12): 19-24, 118. ZHANG Jianwei, HAN Yi, BIAN Hanliang, et al. Experimental research on wind resistance of silty soil cemented by soybean urease induced calcium carbonate precipitation[J]. Industrial Construction, 2020, 50(12): 19-24, 118. (in Chinese) 16 MARTIN K, TIRKOLAEI H K, KAVAZANJIAN E. Enhancing the strength of granular material with a modified enzyme-induced carbonate precipitation (EICP) treatment solution[J]. Construction and Building Materials, 2021, 271: 121529. 17 YUAN H, REN G Z, LIU K, et al. Experimental study of EICP combined with organic materials for silt improvement in the Yellow River flood area[J]. Applied Sciences, 2020, 10(21): 7678. 18 吴敏, 高玉峰, 何稼, 等. 大豆脲酶诱导碳酸钙沉积与黄原胶联合防风固沙室内试验研究[J]. 岩土工程学报, 2020, 42(10): 1914-1921. WU Min, GAO Yufeng, HE Jia, et al. Laboratory study on use of soybean urease-induced calcium carbonate precipitation with xanthan gum for stabilization of desert sand against wind erosion[J]. Chinese Journal of Geotechnical Engineering, 2020, 42(10): 1914-1921. (in Chinese) 19 张建伟, 王小锯, 李贝贝, 等. EICP-木质素联合固化粉土的试验研究[J]. 土木与环境工程学报: 中英文, 2021, 43(2): 201-202. ZHANG Jianwei, WANG Xiaoju, LI Beibei, et al. Experimental study on silt reinforced by EICP-lignin technology[J]. Journal of Civil and Environmental Engineering, 2021, 43(2): 201-202. (in Chinese) 20 土工试验方法标准: GB/T 50123—2019[S]. 北京: 中国计划出版社, 2019. Standard for geotechnical testing method: GB/T 50123—2019[S]. Beijing: China Planning Press, 2019. (in Chinese) 21 吴林玉, 缪林昌, 孙潇昊, 等. 植物源脲酶诱导碳酸钙固化砂土试验研究[J]. 岩土工程学报, 2020, 42(4): 714-720. WU Linyu, MIAO Linchang, SUN Xiaohao, et al. Experimental study on sand solidification using plant-derived urease-induced calcium carbonate precipitation[J]. Chinese Journal of Geotechnical Engineering, 2020, 42(4): 714-720. (in Chinese) 22 原华, 李瑾, 何德洪, 等. 黄河泥沙在海藻酸钠+EICP制备生物砖中的应用[J]. 工程科学与技术, 2026, 58(3): 146-154. YUAN Hua, LI Jin, HE Dehong, et al. Application of Yellow River sediment in the preparation of bio-bricks by sodium Alginate+EICP[J]. Advanced Engineering Sciences, 2026, 58(3): 146-154. (in Chinese)