Toughness enhancement mechanism of cement-sodium silicate composites based on fiber bridging and calcium ion regulation

FENG Xiao; HOU Benao; SUN Wen; YANG Wenda; SHI Zhenzhong; ZHANG Shilei; LI Meiling

doi:10.20265/j.cnki.issn.1007-2993.2025-0202

Volume 40 Issue 5

Oct. 2026

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FENG Xiao, HOU Benao, SUN Wen, YANG Wenda, SHI Zhenzhong, ZHANG Shilei, LI Meiling. Toughness enhancement mechanism of cement-sodium silicate composites based on fiber bridging and calcium ion regulation[J]. GEOTECHNICAL ENGINEERING TECHNIQUE, 2026, 40(5): 755-764. doi: 10.20265/j.cnki.issn.1007-2993.2025-0202

Citation:

FENG Xiao, HOU Benao, SUN Wen, YANG Wenda, SHI Zhenzhong, ZHANG Shilei, LI Meiling. Toughness enhancement mechanism of cement-sodium silicate composites based on fiber bridging and calcium ion regulation[J]. GEOTECHNICAL ENGINEERING TECHNIQUE, 2026, 40(5): 755-764. doi: 10.20265/j.cnki.issn.1007-2993.2025-0202

Citation:

FENG Xiao, HOU Benao, SUN Wen, YANG Wenda, SHI Zhenzhong, ZHANG Shilei, LI Meiling. Toughness enhancement mechanism of cement-sodium silicate composites based on fiber bridging and calcium ion regulation[J]. GEOTECHNICAL ENGINEERING TECHNIQUE, 2026, 40(5): 755-764. doi: 10.20265/j.cnki.issn.1007-2993.2025-0202

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Toughness enhancement mechanism of cement-sodium silicate composites based on fiber bridging and calcium ion regulation

doi: 10.20265/j.cnki.issn.1007-2993.2025-0202

1.
School of Transportation Engineering, Shandong Jianzhu University, Jinan 250101, Shandong, China
2.
Inner Mongolia Yin Chao Ji Liao Water Supply Co., Ltd., Hinggan League 137499, Nei Mongol, China

Received Date: 2025-05-05
Accepted Date: 2025-11-11
Rev Recd Date: 2025-09-16

Available Online: 2026-10-08

Publish Date: 2026-10-08

Abstract

Abstract

Cement-sodium silicate (C-S) grout struggles to effectively absorb dynamic load energy in practical engineering due to insufficient toughness. To address this problem, a ternary synergistic modification system of CaO-EG-PP was proposed. By regulating calcium ion concentration and the bridging effect of polypropylene (PP) fibers, the effects of different mixing ratios (0%~5% calcium oxide (CaO), 0.04% ethylene glycol (EG), 0%~1% PP fibers) on the mechanical properties of C-S consolidates are investigated. Combined with experiments on setting time, compressive strength, flexural-compressive strength ratio, tensile-compressive strength ratio and impact resistance, the toughness enhancement mechanism is revealed. The results show that when the volume ratio (V_c∶V_s) increases from 2∶1 to 5∶1, the setting time is shortened by 41.2%~54.2%. For the group with 1% CaO + 0.04% EG, the compressive strength reaches 6.75 MPa at a PP fiber content of 0.2%, which is 13.4% higher than that of the control group, and the elastic modulus increases by 36.1% simultaneously. The tensile-compressive strength ratio of the group with 3% CaO + 0.04% EG is increased by 5.4%~104.1% compared with the control group, and the PP fiber bridging effect raises the impact energy consumption at complete cracking to 147.15 J (39.24 J for the control group). The study indicates that optimized calcium ion concentration balances the charge density of silicate tetrahedra to stabilize the gel structure, ethylene glycol strengthens interfacial bonding via hydrogen bonds, and fiber bridging together with topological entanglement inhibits microcrack propagation. The three components synergistically realize the coupled enhancement of ion regulation-hydrogen bond stabilization-fiber toughening.
- cement-sodium silicate slurry couple,
- fiber bridging,
- tensile-to-compressive ratio,
- impact resistance test,
- toughness,
- mechanical properties

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[1]	张庆松, 张连震, 刘人太, 等. 水泥−水玻璃浆液裂隙注浆扩散的室内试验研究[J]. 岩土力学, 2015, 36(8): 2159-2168. (ZHANG Q S, ZHANG L Z, LIU R T, et al. Laboratory experimental study of cement-silicate slurry diffusion law of crack grouting with dynamic water[J]. Rock and Soil Mechanics, 2015, 36(8): 2159-2168. (in Chinese) doi: 10.16285/j.rsm.2015.08.005 ZHANG Q S, ZHANG L Z, LIU R T, et al. Laboratory experimental study of cement-silicate slurry diffusion law of crack grouting with dynamic water[J]. Rock and Soil Mechanics, 2015, 36（8）: 2159-2168. (in Chinese) doi: 10.16285/j.rsm.2015.08.005
[2]	李术才, 孙子正, 刘人太, 等. 基于裂隙动水注浆的水泥–水玻璃浆液相界面特征研究[J]. 岩石力学与工程学报, 2013, 32(8): 1640-1646. (LI S C, SUN Z Z, LIU R T, et al. Research on phase interface characteristics of cement-silicate grout based on crack grouting with dynamic water[J]. Chinese Journal of Rock Mechanics and Engineering, 2013, 32(8): 1640-1646. (in Chinese) LI S C, SUN Z Z, LIU R T, et al. Research on phase interface characteristics of cement-silicate grout based on crack grouting with dynamic water[J]. Chinese Journal of Rock Mechanics and Engineering, 2013, 32（8）: 1640-1646. (in Chinese)
[3]	杨秀竹, 雷金山, 张屿庆, 等. 岩溶水养护条件下改性水泥−水玻璃浆液性能试验研究[J]. 铁道科学与工程学报, 2019, 16(12): 2999-3004. (YANG X Z, LEI J S, ZHANG Y Q, et al. Study of the orthogonal test of modified cement-water glass grouting material under the curing condition of Karst water[J]. Journal of Railway Science and Engineering, 2019, 16(12): 2999-3004. (in Chinese) YANG X Z, LEI J S, ZHANG Y Q, et al. Study of the orthogonal test of modified cement-water glass grouting material under the curing condition of Karst water[J]. Journal of Railway Science and Engineering, 2019, 16（12）: 2999-3004. (in Chinese)
[4]	夏冲, 李传贵, 冯啸, 等. 水泥粉煤灰−改性水玻璃注浆材料试验研究与应用[J]. 山东大学学报(工学版), 2022, 52(1): 66-73,84. (XIA C, LI C G, FENG X, et al. Experiment study and application of cement fly ash-modified sodium silicate grouting material test[J]. Journal of Shandong University (Engineering Science), 2022, 52(1): 66-73,84. (in Chinese) doi: 10.6040/j.issn.1672-3961.0.2021.106 XIA C, LI C G, FENG X, et al. Experiment study and application of cement fly ash-modified sodium silicate grouting material test[J]. Journal of Shandong University (Engineering Science), 2022, 52（1）: 66-73,84. (in Chinese) doi: 10.6040/j.issn.1672-3961.0.2021.106
[5]	纪荣健, 杨建明, 吴庆, 等. 水玻璃对大流动度的磷酸铵镁水泥浆体性能的影响[J]. 硅酸盐通报, 2020, 39(1): 28-33. (JI R J, YANG J M, WU Q, et al. Effect of water glass on properties of high flowing magnesium ammonium phosphate cement paste[J]. Bulletin of the Chinese Ceramic Society, 2020, 39(1): 28-33. (in Chinese) JI R J, YANG J M, WU Q, et al. Effect of water glass on properties of high flowing magnesium ammonium phosphate cement paste[J]. Bulletin of the Chinese Ceramic Society, 2020, 39（1）: 28-33. (in Chinese)
[6]	宗明明, 李涛, 杨建明, 等. 硫酸盐环境下水玻璃对磷酸钾镁水泥浆体力学的影响[J]. 中国测试, 2023, 49(3): 152-158. (ZONG M M, LI T, LI J M, et al. Effect of sodium silicate in sulfate environment on the mechanics of potassium magnesium phosphate cement slurry[J]. China Measurement & Test, 2023, 49(3): 152-158. (in Chinese) ZONG M M, LI T, LI J M, et al. Effect of sodium silicate in sulfate environment on the mechanics of potassium magnesium phosphate cement slurry[J]. China Measurement & Test, 2023, 49（3）: 152-158. (in Chinese)
[7]	陈鹏, 王先明, 周安琦, 等. 盾构隧道水泥-水玻璃双液同步注浆研究及应用[J]. 铁道科学与工程学报, 2024, 21(12): 5163-5174. (CHEN P, WANG X M, ZHOU A Q, et al. Research and application of cement-sodium silicate two-component synchronous grouting material in shield tunnel[J]. Journal of Railway Science and Engineering, 2024, 21(12): 5163-5174. (in Chinese) doi: 10.19713/j.cnki.43-1423/u.T20240373 CHEN P, WANG X M, ZHOU A Q, et al. Research and application of cement-sodium silicate two-component synchronous grouting material in shield tunnel[J]. Journal of Railway Science and Engineering, 2024, 21（12）: 5163-5174. (in Chinese) doi: 10.19713/j.cnki.43-1423/u.T20240373
[8]	郑昊, 李兆平, 王子元, 等. 超细水泥−水玻璃双液浆性能及注浆止水效果试验研究[J]. 铁道建筑, 2024, 64(1): 95-99. (ZHENG H, LI Z P, WANG Z Y, et al. Experimental study on performance and grouting water plugging effect of ultrafine cement-sodium silicate slurry[J]. Railway Engineering, 2024, 64(1): 95-99. (in Chinese) ZHENG H, LI Z P, WANG Z Y, et al. Experimental study on performance and grouting water plugging effect of ultrafine cement-sodium silicate slurry[J]. Railway Engineering, 2024, 64（1）: 95-99. (in Chinese)
[9]	汤青青, 张丽娟, 孙国文, 等. 三乙醇胺−氢氧化钙对大掺量粉煤灰水泥胶凝体系早期活性激发[J]. 硅酸盐通报, 2018, 37(9): 2737-2742. (TANG Q Q, ZHANG L J, SUN G W, et al. Early activity of triethanolamine-calcium hydroxide activates to high volume fly ash in cement-gel system[J]. Bulletin of the Chinese Ceramic Society, 2018, 37(9): 2737-2742. (in Chinese) doi: 10.16552/j.cnki.issn1001-1625.2018.09.008 TANG Q Q, ZHANG L J, SUN G W, et al. Early activity of triethanolamine-calcium hydroxide activates to high volume fly ash in cement-gel system[J]. Bulletin of the Chinese Ceramic Society, 2018, 37（9）: 2737-2742. (in Chinese) doi: 10.16552/j.cnki.issn1001-1625.2018.09.008
[10]	李祖仲, 毛浩天, 王亮, 等. 混凝土早强修补材料基准水泥配合比优化研究[J]. 硅酸盐通报, 2025, 44(3): 802-810. (LI Z Z, MAO H T, WANG L, et al. Optimization of standard cement mix ratio for concrete early-strength repair materials[J]. Bulletin of the Chinese Ceramic Society, 2025, 44(3): 802-810. (in Chinese) LI Z Z, MAO H T, WANG L, et al. Optimization of standard cement mix ratio for concrete early-strength repair materials[J]. Bulletin of the Chinese Ceramic Society, 2025, 44（3）: 802-810. (in Chinese)
[11]	张轶, 张彪, 邓翔文, 等. LDHs-NO₂对水泥砂浆性能及钢筋锈蚀的影响[J]. 硅酸盐通报, 2025, 44(1): 1-10. (ZHANG Y, ZHANG B, DENG X W, et al. Effect of LDHs-NO₂ on properties of cement mortar and corrosion of steel bar[J]. Bulletin of the Chinese Ceramic Society, 2025, 44(1): 1-10. (in Chinese) doi: 10.16552/j.cnki.issn1001-1625.2024.1003 ZHANG Y, ZHANG B, DENG X W, et al. Effect of LDHs-NO₂ on properties of cement mortar and corrosion of steel bar[J]. Bulletin of the Chinese Ceramic Society, 2025, 44（1）: 1-10. (in Chinese) doi: 10.16552/j.cnki.issn1001-1625.2024.1003
[12]	王晨宇, 韦经杰, 龙武剑, 等. 纤维取向分布对水泥基复合材料力学性能的影响及其评价方法的研究进展[J]. 材料导报, 2022, 36(15): 20120133. (WANG C Y, WEI J J, LONG W J, et al. Review on the effect of fiber orientation distribution on mechanical performance of cement-based composites and its evaluated methods[J]. Materials Reports, 2022, 36(15): 20120133. (in Chinese) doi: 10.11896/cldb.20120133 WANG C Y, WEI J J, LONG W J, et al. Review on the effect of fiber orientation distribution on mechanical performance of cement-based composites and its evaluated methods[J]. Materials Reports, 2022, 36（15）: 20120133. (in Chinese) doi: 10.11896/cldb.20120133
[13]	LIU P, WANG H T, LIU Q S, et al. FDEM numerical study on the large deformation mechanism of layered rock mass tunnel under excavation-unloading disturbance[J]. Tunnelling and Underground Space Technology, 2025, 159: 106497. doi: 10.1016/j.tust.2025.106497
[14]	曾熙文, 王艳芬, 赵光明, 等. 聚丙烯纤维改性超细水泥复合注浆材料性能研究[J]. 煤炭科学技术, 2024, 52(7): 57-67. (ZENG X W, WANG Y F, ZHAO G M, et al. Study on properties of polypropylene fiber-modified ultrafine cement composite grouting materials[J]. Coal Science and Technology, 2024, 52(7): 57-67. (in Chinese) doi: 10.12438/cst.2023-1292 ZENG X W, WANG Y F, ZHAO G M, et al. Study on properties of polypropylene fiber-modified ultrafine cement composite grouting materials[J]. Coal Science and Technology, 2024, 52（7）: 57-67. (in Chinese) doi: 10.12438/cst.2023-1292
[15]	马豪达, 白银, 陈波, 等. 水胶比和橡胶掺量对砂浆力学性能及能量演化规律的影响[J]. 材料导报, 2025, 39(1): 23120226. (MA H D, BAI Y, CHEN B, et al. Influence of water-cement ratio and rubber admixture on mechanical properties and energy evolution law of mortar[J]. Materials Reports, 2025, 39(1): 23120226. (in Chinese) doi: 10.11896/cldb.23120226 MA H D, BAI Y, CHEN B, et al. Influence of water-cement ratio and rubber admixture on mechanical properties and energy evolution law of mortar[J]. Materials Reports, 2025, 39（1）: 23120226. (in Chinese) doi: 10.11896/cldb.23120226
[16]	贾毅, 赵强, 韦朝宽, 等. 聚丙烯纤维增强水泥基复合材料单轴拉伸损伤本构模型研究[J]. 硅酸盐通报, 2024, 43(11): 4061-4071. (JIA Y, ZHAO Q, WEI C K, et al. Uniaxial tensile damage constitutive model of polypropylene fiber reinforced engineered cementitious composites[J]. Bulletin of the Chinese Ceramic Society, 2024, 43(11): 4061-4071. (in Chinese) JIA Y, ZHAO Q, WEI C K, et al. Uniaxial tensile damage constitutive model of polypropylene fiber reinforced engineered cementitious composites[J]. Bulletin of the Chinese Ceramic Society, 2024, 43（11）: 4061-4071. (in Chinese)
[17]	沈霁, 姚力豪, 王彦平, 等. PP纤维对疏水性水泥-矿渣复合材料性能的影响[J]. 化工新型材料, 2024, 52(S1): 266-271. (SHEN J, YAO L H, WANG Y P, et al. Effect of PP fibers on the performance of hydrophobic cement-slag composites[J]. New Chemical Materials, 2024, 52(S1): 266-271. (in Chinese) doi: 10.19817/j.cnki.issn1006-3536.2024.S1.023 SHEN J, YAO L H, WANG Y P, et al. Effect of PP fibers on the performance of hydrophobic cement-slag composites[J]. New Chemical Materials, 2024, 52（S1）: 266-271. (in Chinese) doi: 10.19817/j.cnki.issn1006-3536.2024.S1.023
[18]	范淋, 杨曌, 祁小龙, 等. SMAF增强PP/PVA混杂纤维工程水泥基复合材料拉伸性能[J]. 硅酸盐通报, 2025, 44(3): 811-820. (FAN L, YANG Z, QI X L, et al. Tensile properties of pp/pva hybrid fiber engineered cementitious composites reinforced by SMAF[J]. Bulletin of the Chinese Ceramic Society, 2025, 44(3): 811-820. (in Chinese) doi: 10.16552/j.cnki.issn1001-1625.2024.1055 FAN L, YANG Z, QI X L, et al. Tensile properties of pp/pva hybrid fiber engineered cementitious composites reinforced by SMAF[J]. Bulletin of the Chinese Ceramic Society, 2025, 44（3）: 811-820. (in Chinese) doi: 10.16552/j.cnki.issn1001-1625.2024.1055
[19]	李召峰, 高益凡, 张健, 等. 水溶性植物胶改性水泥–水玻璃封堵材料试验研究[J]. 岩土工程学报, 2020, 42(7): 1312-1321. (LI Z F, GAO Y F, ZHANG J, et al. Experimental study of water-soluble vegetable gum-modified cement-sodium silicate plugging materials[J]. Chinese Journal of Geotechnical Engineering, 2020, 42(7): 1312-1321. (in Chinese) doi: 10.11779/CJGE202007015 LI Z F, GAO Y F, ZHANG J, et al. Experimental study of water-soluble vegetable gum-modified cement-sodium silicate plugging materials[J]. Chinese Journal of Geotechnical Engineering, 2020, 42（7）: 1312-1321. (in Chinese) doi: 10.11779/CJGE202007015
[20]	连会青, 杨俊文, 雷玉娟. 水泥−粉煤灰−水玻璃注浆材料强度影响因素试验研究[J]. 煤炭工程, 2018, 50(12): 107-112. (LIAN H Q, YANG J W, LEI Y J. Experimental study on the influence factors of strength of cement-fly ash-water-glass grouting material[J]. Coal Engineering, 2018, 50(12): 107-112. (in Chinese) doi: 10.11799/ce201812028 LIAN H Q, YANG J W, LEI Y J. Experimental study on the influence factors of strength of cement-fly ash-water-glass grouting material[J]. Coal Engineering, 2018, 50（12）: 107-112. (in Chinese) doi: 10.11799/ce201812028
[21]	中华人民共和国交通部. 水泥混凝土圆柱体轴心抗压强度试验方法: T 0554—2005[S]. 北京: 人民交通出版社, 2005. ((Ministry of Communications of the People’s Republic of China. Test Method for Axial Compressive Strength of Cement Concrete Cylinders: T 0554—2005[S]. Beijing: China Communications Press, 2005.(in Chinese) (Ministry of Communications of the People’s Republic of China. Test Method for Axial Compressive Strength of Cement Concrete Cylinders: T 0554—2005[S]. Beijing: China Communications Press, 2005.(in Chinese)
[22]	国家市场监督管理总局, 国家标准化管理委员会. 水泥胶砂强度检验方法(ISO法): GB/T 17671—2021[S]. 北京: 中国标准出版社, 2021. (State Administration for Market Regulation, National Standardization Administration. Test method of cement mortar strength (ISO method): GB/T 17671—2021[S]. Beijing: Standards Press of China, 2021. (in Chinese) State Administration for Market Regulation, National Standardization Administration. Test method of cement mortar strength (ISO method): GB/T 17671—2021[S]. Beijing: Standards Press of China, 2021. (in Chinese)
[23]	工业和信息化部. 高延性纤维增强水泥基复合材料力学性能试验方法: JC/T 2461—2018[S]. 北京: 建材工业出版社, 2018. (Ministry of Industry and Information Technology. Standard test method for the mechanical properties of ductile fiber reinforced cementitious composites: JC/T 2461—2018[S]. Beijing: China Building Materials Industry Press, 2018. (in Chinese) Ministry of Industry and Information Technology. Standard test method for the mechanical properties of ductile fiber reinforced cementitious composites: JC/T 2461—2018[S]. Beijing: China Building Materials Industry Press, 2018. (in Chinese)
[24]	中国工程建设标准化协会. 纤维混凝土试验方法标准: CECS 13—2009[S]. 北京: 中国计划出版社, 2010. (China Association for Engineering Construction Standardization. Standard test methods for fiber reinforced concrete: CECS 13—2009[S]. Beijing: China Planning Press, 2010. (in Chinese) China Association for Engineering Construction Standardization. Standard test methods for fiber reinforced concrete: CECS 13—2009[S]. Beijing: China Planning Press, 2010. (in Chinese)
[25]	陈鑫, 殷苏鑫. 氧化钙–碳酸钠复合激发矿渣灌浆材料流变特性研究[J]. 现代隧道技术, 2023, 60(6): 269-277. (CHEN X, YIN S X. Study on the rheological properties of calcium oxide-sodium carbonate composite activated slag based grouting material[J]. Modern Tunnelling Technology, 2023, 60(6): 269-277. (in Chinese) doi: 10.13807/j.cnki.mtt.2023.06.029 CHEN X, YIN S X. Study on the rheological properties of calcium oxide-sodium carbonate composite activated slag based grouting material[J]. Modern Tunnelling Technology, 2023, 60（6）: 269-277. (in Chinese) doi: 10.13807/j.cnki.mtt.2023.06.029
[26]	田婷, 张爱, 李国新, 等. 氧化钙对硅酸盐水泥–铝酸盐水泥–硫酸钙体系低温水化性能的影响[J]. 硅酸盐通报, 2015, 34(12): 3670-3675. (TIAN T, ZHANG A, LI G X, et al. Influence of calcium oxide on the hydration performance of Portland cement-aluminate cement-gypsum ternary system at low temperature[J]. Bulletin of the Chinese Ceramic Society, 2015, 34(12): 3670-3675. (in Chinese) TIAN T, ZHANG A, LI G X, et al. Influence of calcium oxide on the hydration performance of Portland cement-aluminate cement-gypsum ternary system at low temperature[J]. Bulletin of the Chinese Ceramic Society, 2015, 34（12）: 3670-3675. (in Chinese)
[27]	孔爱散, 钱锶嘉, 王伟, 等. 聚丙烯纤维协同碳化养护技术改性水泥土的抗剪特性研究[J]. 硅酸盐通报, 2025, 44(5): 1939-1948. (KONG A S, QIAN S J, WANG W, et al. Shear strength characteristics of cement soil modified with polypropylene fiber and carbonation curing technology[J]. Bulletin of the Chinese Ceramic Society, 2025, 44(5): 1939-1948. (in Chinese) doi: 10.16552/j.cnki.issn1001-1625.2024.1239 KONG A S, QIAN S J, WANG W, et al. Shear strength characteristics of cement soil modified with polypropylene fiber and carbonation curing technology[J]. Bulletin of the Chinese Ceramic Society, 2025, 44（5）: 1939-1948. (in Chinese) doi: 10.16552/j.cnki.issn1001-1625.2024.1239
[28]	鞠鹏, 雷宝锋, 姬语洋, 等. 聚丙烯纤维对流态固化土流变及力学性能的影响[J]. 材料导报, 2025, 39(20): 94-101. (JU P, LEI B F, JI Y Y, et al. Effect of polypropylene fibers on rheological and mechanical properties of fluid-consolidated soil[J]. Materials Reports, 2025, 39(20): 94-101. (in Chinese) doi: 10.11896/cldb.24080171 JU P, LEI B F, JI Y Y, et al. Effect of polypropylene fibers on rheological and mechanical properties of fluid-consolidated soil[J]. Materials Reports, 2025, 39（20）: 94-101. (in Chinese) doi: 10.11896/cldb.24080171

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Toughness enhancement mechanism of cement-sodium silicate composites based on fiber bridging and calcium ion regulation

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